626 results about "Calcium chloride anhydrous" patented technology

The invention relates to a preparation method of highly filled polyethylene synthetic paper. The preparation method is characterized in that: high density polyethylene, heavy calcium carbonate, waterless calcium chloride, sodium dodecyl benzene sulfonate and an antioxidant 1076 are added to a banbury mixer, and a temperature reaches 150 to 180 DEG C through banburying; materials after banburying are sent to an extruder, and melts from the extruder are sent to a calender by a T-shaped die head and then calendered into sheets at the temperature of 140 to 160 DEG C; the sheets from the calender are cooled to below 50 DEG C by air with a relative humidity of 50 % to 100%; and the sheets are sent to a multi-roller stretcher, preheated in the stretcher to 110 to 130 DEG C, and stretched by group 2 to 5 stretching rollers to obtain the needed synthetic paper. The purity of the highly filled polyethylene synthetic paper prepared through the method provided by the present invention is 0.9 to 1.5 g / cm<3>.

The invention discloses a litsea cubeba oil microcapsule and a preparation method thereof, and belongs to the technical field of mouldproof and insecticidal capsules. The litsea cubeba oil microcapsule is characterized by being prepared by the complex coacervation of litsea cubeba oil taken as a core material, sodium alginate taken as a main wall material and an aqueous solution which contains 1% to 5% of chitosan and 2% to 5% of anhydrous calcium chloride and is taken as a coagulating bath solution, wherein the mass ratio of the sodium alginate to the litsea cubeba oil is 1:(1-4). The preparation method mainly comprises the following steps: firstly preparing an emulsion A of the sodium alginate and the litsea cubeba oil; then preparing the aqueous solution of the chitosan and the anhydrous calcium chloride as the coagulating bath solution B; dripping the emulsion A into the coagulating bath solution B; and solidifying the mixture for certain time and then filtering the mixture, thereby obtaining the litsea cubeba oil microcapsule. Thus, the litsea cubeba oil microcapsule which is high in litsea cubeba oil content, long in service time and good in mouldproof and insecticidal effect and the preparation method of the litsea cubeba oil microcapsule are provided. The litsea cubeba oil microcapsule is mainly used for performing mouldproof and insecticidal functions on grains as well as on clothes.

The invention relates to a graphene / hydroxyapatite nano composite and the preparation method thereof, particularly relates to a hydrothermal method for preparing graphene / hydroxyapatite nano composite through the assistance of amino acid, and belongs to the field of nano composite and biological material. According to the invention, graphene oxide is placed in deionized water for ultrasonic dispersion, and calcium chloride anhydrous is added for stirring, so as to form mixed solution A; amino acid is added into dilute phosphoric acid for stirring so as to form solution b, the dilute hydrochloric acid solution is used for adjusting the solution to enable the PH value to be 7.5 to 8.5, finally the mixed solution A and the mixed solution B are mixed to transfer into a polytetrafluoroethylene reaction kettle for hydro-thermal reaction, and after the reaction is finished, the composite can be obtained through centrifugating, cleaning and vacuum drying the product. The invention has the advantages that the operating process is relatively simple, the structure is controllable, the surface appearance is better, the specific surface area is larger, the dimension is even, and the like.

The invention discloses a method for determining content of potassium, sodium, calcium and magnesium in cigarette paper simultaneously, which includes the following steps: cutting 100+ / -0.1 mg of a cigarette paper sample, using 100mL of 0.02mol / L hydrochloric acid as an extracting agent, ultrasonic-extracting for 18-22min to obtain extract liquor, selecting 5.0mL of the extract liquor to a 25mL volumetric flask, bringing to the volume with 0.02mol / L hydrochloric acid to obtain diluent, and filtering the diluent through a 0.45 mu m filtering film to obtain sample liquid to be detected; selecting sodium chloride, potassium chloride, hexahydrate magnesium chloride and anhydrous calcium chloride, using pure water as solvent, preparing mixed standard solution through gradual diluting, and adding 0.02mol / L hydrochloric acid to prepare series standard working solution; detecting and analyzing the series working solution and the sample liquid to be detected respectively through an ion chromatographic instrument; and drawing a standard curve and calculating results. The method is fast and simple to operate, high in sensitivity, low in detection limit, good in recovery rate, and suitable for batch analyzing of important inorganic elements in the cigarette paper.

The invention discloses a system for producing anhydrous calcium chloride by using industrial waste hydrochloric acid, and a technology thereof. The reaction system of the technology is connected to an evaporation system through a refined calcium chloride conveying device, and the evaporation system, a calcium chloride forming machine, a drying system, a finished calcium chloride conveying device and a finished calcium chloride bunker are sequentially connected; the reaction system is mutually connected with a reaction tail gas treatment system; and the refined calcium chloride conveying device is also connected with a dry tail gas washing device, and the gas outlet end of the drying system is connected to the inlet end of the evaporation system through the dry tail gas washing device. The reaction tail gas washing device adopts a clean calcium chloride solution as an absorbent, and the hydrogen chloride absorbed calcium chloride solution returns to a calcium chloride reactor, so the concentration of hydrochloric acid is not diluted, and the energy consumption of the evaporation system is reduced; and the calcium chloride solution is used to wash dust-containing tail gas with calories to make dusts not exist in vented tail gas, and a circulating absorption solution absorbing the calories in the tail gas returns to the evaporation system and is reused, so the energy consumption of the evaporation system is reduced.

The invention relates to a preparation method for flame retardant bisphenol A bi(diphenyl phosphate). The preparation method comprises the following steps: taking phosphorus oxychloride, bisphenol A and phenol as raw materials, adopting anhydrous zinc chloride or anhydrous aluminum chloride as a main catalyst, and adopting anhydrous calcium chloride or calcium phosphate as a promoter; adding the phosphorus oxychloride, the main catalyst and the promoter into a reactor for intensive stirring, when the materials are heated up to 73 to 78 DEG C, continuously adding bisphenol A, after the addition of bisphenol A is completed within 2.5 to 3 hours, heating up to and maintaining the temperature of 110 to 115 DEG C, and continuing the reaction for 1.5 to 2 hours; leaking out excessive phosphorus oxychloride under the normal and reduced pressure; and cooling down the intermediate product to 100 DEG C, continuous dropping phenol into the intermediate product, heating up to 140 DEG C 2 hours later, carrying out the reaction for 3 to 4 hours, monitoring the content of phenol through the liquid chromatography, and complementing phenol till the phenol content in the crude product is less than 0.5 percent. The yield reaches 98 percent; the content of triphenyl phosphate is less than 1.5 percent; and the acid number is 0.03mgKOH / g.

The invention relates to a compound chloride-based environment-friendly snowmelt agent, which comprises a main component of a chloride mixture of calcium chloride dihydrate and magnesium chloride hexahydrate, contains various additives of sodium citrate, disodium hydrogen phosphate, sodium metasilicate, urea and the like and can contain abscisic acid or indoleacetic acid or a mixture thereof, sodium tartrate, humic acid or a salt thereof. The snowmelt agent in the invention can reduce the corrosivity to a metal object and a concrete structure effectively, improves the anti-salinization capabilities of a seed, a plant and soil, can be used when the temperature is as low as -25 DEG C, and solves the problems of bad snow melting effect caused by an autologous freezing point characteristic when a sodium chloride-based snowmelt agent is used and high cost caused by using an anhydrous calcium chloride-based snowmelt agent under the condition. The invention also provides a use method of the snowmelt agent, which places the main component and each additive separately without preparing a finished product of the snowmelt agent in advance and compounds the snowmelt agent on the spot before using. The method can avoid the problems of wetting, hardening and the like of the finished product of the snowmelt agent in the processes of storing and transporting, can avoid the defects of high-temperature energy consumption in the process of preparing compound granules (such as coating and granulating) and the capability of causing decomposition of the additives, has simple operations and a low cost, and is particularly suitable for on-site mechanical shed work.

A preparation method for the p-phenylene terephthalamide p-phenylenediamine with high molecular weight, which comprises the following steps: adding anhydrous calcium chloride and N-methylpyrrolidone (NMP) to a reactor according to the weight proportion of 4-20: 100; adding proper amount of p-phenylenediamine (PPD), starting stirring, stirring for 30min at room temperature; inletting cooling medium to the reactor jacket to reduce temperature; reducing the system temperature to 0-15 DEG C below zero; adding the first batch of terephthaloyl chloride (TPC), continually stirring for 30min; reducing the temperature to 0-15 DEG C below zero again; adding the second batch of TPC; stirring quickly; stopping reaction after the system occurs pole-climbing and gel and is stirred to prepare the p-phenylene terephthalamide p-phenylenediamine. By adding the reactant TPC by two batches, the method of the invention can effectively control the reaction temperature; by cooling and reducing the temperature of the system, the method reduces the occurrence of side reaction and prepares the p-phenylene terephthalamide p-phenylenediamine with higher molecular weight and better color and luster.

The invention discloses a new method for solidification treatment of tailing sand accumulated in an ore field, in particular to a tailing sand biological prefabricated product and a preparation method thereof, and belongs to the cross scientific and technical field of microbiology and building materials. The method is characterized in that the cementing mechanism is realized by using microorganisms to induce the generation of calcium carbonate to conduct solidification treatment, so as compared with other using methods for the tailing sand, the method is environment-friendly and free of environmental pollution, and the calcium carbonate formed by microbial mineralization has the cementing property that cannot be obtained from chemical preparation. The prefabricated product comprises the following raw materials: the tailing sand from an iron ore field, bacillus pasteurii, casein, soy protein and anhydrous calcium chloride, which are shaped in a cementing mode according to a definite cementing process. The prefabricated product can be used for cementing prefabricated bricks as well as for the reinforcement of tailing sand ore dams. The new interdisciplinary method provided by the invention has the biggest characteristics of environment protection, no pollution, recycling of discarded tailing sand, and the like.

The invention discloses a method utilizing phosphate mineralized bacteria to solidify and loosen loose sand particles. The method comprises the steps that bacillus subtilis is inoculated to beef extract and a peptone culture medium for obtaining bacterial liquid, then disodium phenyl phosphate is added to the prepared bacterial liquid, an anhydrous calcium chloride solution with the concentration of 0.5-1.5mol / L is prepared, 70-90g of sand with two levels of less than 0.15mm and of 0.15-0.30mm is prepared according to the closest Fuller packing method and then loaded into a trial mould with a buffering pad and a sand filter, the bacterial liquid and a chemical solution are respectively poured into the prepared sand in the third step through a peristaltic pump according to a volume ratio of 1:1, the flowing speed of the bacterial liquid is controlled to be 4-6mL / min, the flowing speed of the chemical solution is 10-15mL / min, continuous pouring is carried out for 8-15 days, and the sand with the mould is placed into an oven of 60 DEG C for being conserved for 48h and then taken out and released from the mould. The compressive strength of the sand can reach 1.0MPa.

The invention relates to an over mature vinegar brewing process. The over mature vinegar brewing process includes the following steps: smashing sorghums, adding water to make Be' of 16-18, adjusting the pH value to 6.0-6.4, adding anhydrous calcium chloride with 0.2% by mass of the sorghums, adding alpha-amylase with 0.25% by mass of the sorghums, adding saccharifying enzyme for 150 active units per gram of the sorghums according to the mass of the sorghums to react for 30 minutes, adding the mixture into a material stirring pool, adding the mixture into an alcoholic fermentation jar to ferment after the mixture is stirred to be even, adding brans, cavings and rice hulls into the mixture and stirring the mixture, obtaining white vinegar fermentative substrates after ferment, placing 50% by mass of the fermented vinegar fermentative substrates into a smoking jar to smoke, obtaining smoked vinegar fermentative substrates, placing the rest white vinegar fermentative substrates and obtained vinegar fermentative substrates respectively into a white spraying pool and a smoking spraying pool to obtain semi-finished products of the over mature vinegar through covering spraying, placing the semi-finished products of the over mature vinegar into a mature vinegar brewing jar, placing the mature vinegar brewing jar naturally, and obtaining the over mature vinegar more than half of a year later. According to the over mature vinegar brewing process, the over mature vinegar is simple in process, high in quality, stable, and high in rice starch utilization rate.

The invention provides a method for preparing olystyrene hollow microspheres with high degree of sphericity. The method comprises the following steps of a, dissolving a polystyrene polymer and an additive in an organic solvent to obtain an oil phase; b, dissolving polyvinyl alcohol and anhydrous calcium chloride in distilled water to obtain an outer water phase; c, respectively injecting distilled water, the oil phase and the outer water phase into an inner water phase pipeline, an oil phase pipeline and an outer water phase pipeline in an axial emulsifiable granule generator by virtue of an injection pump and reacting to obtain distilled-water-in-oil-phase compound emulsifiable granules; d, collecting the compound emulsifiable granules in a rotary bottle in which the outer water phase is contained, placing in a rotary evaporator, heating in a water bath for curing; and e, cleaning the cured microspheres with distilled water, drying the microspheres in a drying oven to obtain the hollow microspheres with high degree of sphericity. The method disclosed by the invention is suitable for X-ray-driven symmetry research, laser inertial confinement fusion physical experiments and high-energy physical experiments.

The invention discloses a antifreeze early strength admixture used in construction using concrete that includes anhydrous calcium chloride, fly ash, inositol hexaphosphate, triethanolmine, sodium benzoate, azimidobenzene, and adding monoethanolamine to adjust the pH value to 9-9.5. The advantages of the invention are that: low cost, easy to gain raw material, no toxin, and no pollution to environment; improving the compressive strength and anti-leaking, anti-charring, antifreeze ability; shortening time limit for a project; ensuring intension and saving cement content.

The invention belongs to the field of gas drying, and provides a drying agent. The drying agent comprises 1-5 parts by weight of anhydrous calcium chloride, 0-8 parts by weight of calcium chloride dihydrate, 1-5 parts by weight of polyacrylamide and 0-1 part by weight of vegetable starch by weight. The drying agent provided by the invention adopts an organic macromolecule component, and is low in raw material cost; higher hygroscopicity can be obtained and can be up to over 400% through the structural characteristics of macromolecules; the drying agent is long in effective time; no liquid water oozes.

The invention relates to an extraction method of essential oil from citrus peel, the extraction method is characterized in that hardening liquid is prepared by taking 99.04 percent to 99.26 percent of water, 0.1 percent to 0.2 percent of sodium benzoate, 0.5 percent to 0.8 percent of calcium chloride anhydrous and 0.04 percent to 0.06 percent of sodium bisulfite; 1 part of fresh citrus peel and 4 parts of the hardening liquid are further taken according to the proportion by weight, the even mixing is carried out to allow the citrus peel to be fully submerged in the hardening liquid, the time is 2 to 3 hours, the citrus peel is fished out from the hardening liquid after the completion of the soaking and crushed by using a roller crusher, the obtained citrus peel residues are directly or indirectly used as animal feeds after the drying, the mixed liquid of citrus oil and water which is obtained by crushing is filtered by using a filter net with 80 to 120 meshes, then a pipeline type high-speed centrifuge is used for separation under the rotation speed of 18000 turns / min to 20000 turns / min, the obtained water enters a sedimentation tank, big scraps are carried out the sedimentation, supernatant liquid is returned to a soaking tank of the citrus peel as hardening water, the obtained citrus oil is stored for more than 7 days at 3 DEG C to 8 DEG C, and the essential oil from the citrus peel is obtained after the filtration.

The invention discloses a nanoparticle enhanced low-interfacial-tension foam system and a preparation method thereof. The foam system comprises the following components by weight percent: 0.2-0.8% ofa cationic surface active agent, 0.01-0.1% of a stabilizer, 0.5-1.0% of a polymerization inhibitor, 0.3-1.0% of an additive and the balance of mineralized water, wherein the cationic surface active agent is selected from dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and stearyl trimethyl ammonium bromide; the stabilizer is selectedfrom modified nano-SiO2, modified nano-MgO and modified nano-TiO2; the polymerization inhibitor is sodium citrate; the additive is selected from ethylene glycol and dodecanol; the mineralized water isa mixed water solution of sodium chloride, anhydrous calcium chloride and anhydrous magnesium sulfate. The nanoparticle enhanced low-interfacial-tension foam system is good in foaming performance andfoam stabilizing performance, high in interfacial activity, cheap and easily accessible in raw material, simple in preparation method and excellent in foam combination performance.

The invention discloses a polyazomethine hole transport material and a preparation method thereof, and belongs to the technical field of polymer materials. The preparation method for soluble polyazomethine comprises the following step of: performing polymerization reaction on diamine monomer containing a tertiary aromatic amine structure with dialdehyde monomer at lower temperature for a certain period of time by taking N-methylpyrrolidone (NMP), dimethyl formamide (DMF) or dimethylacetamide (DMAc), and obtaining a generated material in absolute ethanol, wherein anhydrous calcium chloride or anhydrous lithium chloride can be added to serve as a catalyst. The polyazomethine hole transport material serving as a novel hole transport material is polyazomethine polymer with a tertiary aromatic amine structure, and has high glass transition temperature (Tg), high dissolubility and photoelectric properties; and the method has the advantages of simple process and energy conservation.

The invention relates to 3D direct writing zirconium oxide ceramic ink, which comprises zirconium oxide particles, a solvent, a binder, a dispersant and a salt, wherein the particle size of the zirconium oxide particles is 0.1-2 [mu]m, the solid content of the zirconium oxide particles in the ink is 40-58 vol%, the dispersant is one or a variety of materials selected from polyacrylic acid, polyvinyl acid, ammonium polyacrylate, polyvinyl acid salt, polyacrylate, polycarboxylate and polyacetyl imine, the dispersant accounts for 0.1-2% of the mass of the zirconium oxide particle dry powder, andthe salt is one or a variety of materials selected from ammonium chloride, zinc acetate, sodium chloride, magnesium chloride, potassium chloride, barium chloride, ammonium bicarbonate, anhydrous calcium chloride, potassium carbonate, sodium bicarbonate, sodium carbonate, anhydrous sodium carbonate, anhydrous sodium acetate, anhydrous calcium chloride, copper sulfate, basic copper carbonate, ammonium sulfate, ammonium bicarbonate, potassium aluminum sulfate and sodium citrate, and accounts for 0.001-0.1% of the mass of the ink. According to the present invention, the 3D direct writing zirconiumoxide ceramic ink can be printed at the room temperature, has high solid content while can flow out of the fine spraying nozzle and cannot cause the clogging, can be quickly cured into the fine wirewith a certain strength, and has good rheological property.

The invention discloses a temperature-resistant foam-stabilizing type low interfacial tension foaming agent and a preparation method thereof. The temperature-resistant foam-stabilizing type low interfacial tension foaming agent comprises the following raw material components by mass percent: 0.18-0.25% of an anionic surfactant, 0.05-0.1% of an amphoteric surfactant, 0.08-0.15% of a nonionic surfactant and 99.2-99.69% of mineralized water, wherein the anionic surfactant is one of fatty acid polyoxyethylene ether sodium sulfate and disodium laureth sulfosuccinate; the amphoteric surfactant is one of erucamidopropyl sultaine and cocoamidopropyl betaine; the nonionic surfactant is one of coconutt diethanol amide and polyoxyethylene ether; the mineralized water is a mixed water solution of sodium chloride, sodium sulfate, sodium hydrogen carbonate, anhydrous calcium chloride and magnesium chloride hexahydrate. The temperature-resistant foam-stabilizing type low interfacial tension foaming agent, disclosed by the invention, has the advantages of high temperature resistance, good foam stability, low interfacial tension and the like.

The invention discloses a desiccant composition, including 55-90% (weight) easy deliquescence salt and 10-45% (weight) potato modified starch, wherein, the easy deliquescence salt is anhydrous calcium chloride, anhydrous magnesium chloride or mixture of them. The invention provided desiccant has a large water absorbing capacity and excellent moisture sorption effect in a long time; and immobile after absorbing water and holds a certain tractable gel shape, convenient use, no-mould after absorbing water and good stability. The invention provided desiccant has low production cost, easy industrial production, meanwhile has advantages of wide materials sources, innocuity, degradable and wide applicability.

The invention provides a drying agent for removing humidity and odor, which comprises the components by weight percent: 40-75% of ultrahigh molecular weight polyethylene, 20-55% of water absorbent and 5-40% of activated carbon, wherein the molecular weight of the ultrahigh molecular weight polyethylene is 2.5-4 million; and the water absorbent is one or compound of more in water absorption mineral substance, attapulgite clay, active carbon, anhydrous calcium chloride and activated aluminium oxide. The drying agent not only has the performance of removing humidity and odor with high efficiency, but also can be combined with other different functional agents, thus having the effects of absorbing acidic gas and alkaline gas or antibiosis, and the like.

The invention relates to a biological desiccant, which is characterized by comprising the following ingredients including a water retention agent, a water absorbent, an anti-sticking agent and an adsorbent, wherein the water retention agent is konjak flying powder or konjak full powder; the water absorbent is one or a mixture of several materials from anhydrous calcium chloride, magnesium chloride and L-carnitine-L-tartrate; the anti-sticking agent is one or a mixture of several materials from silicon dioxide, white carbon black and talcum powder; the adsorbent is bamboo charcoal or active carbon. The biological desiccant and a preparing method of the biological desiccant have the advantages that the effects of safety, no toxicity and no pollution are achieved; the water absorbing capacity is high; the biological desiccant is suitable for being applied to environments with any humidity; in the environment with T being 25 DEG C and RH being 90 percent, the moisture absorption rate can reach 70 to 200 percent; the prepared desiccant finished product also has the function of odor adsorption; the preparing process is simple; the one-step forming rate of the product is high; the problem of low profits since the konjak flying powder is only used as feed for a long time is solved; the application value of konjak by-products and the diversity of drying agent products are improved.

The invention belongs to the field of water body pollution control, and provides a preparation method of a flavone sustained-release algal inhibition preparation. The flavone sustained-release algal inhibition preparation comprises 30% to 50% of 5,4'-dihydroxylflavone and 50% to 70% of embedding agent such as sodium alginate in percentage by weight, and has an entrapment rate of 50% to 70%. The preparation method of the flavone sustained-release algal inhibition preparation comprises the steps of: mixing a 5,4'-dihydroxylflavone dimethyl sulfoxide solution and a sodium alginate solution and mixing the obtained mixed solution and the mixed solution of chitosan and anhydrous calcium chloride; and then after performing the reaction for a certain time, filtering to obtain a precipitated flavone sustained-release algal inhibition preparation. According to the preparation method, the used materials are high in ecological safety; the prepared flavone sustained-release algal inhibition preparation can obviously inhibit the growth activity of bloom algae, particularly inhibits the growth activity of microcystis aeruginosa, and can control or manage outbreak of algal bloom in lakes. Compared with the prior art, the flavone sustained-release algal inhibition preparation has durable action time, and is particularly suitable for preventing and managing the algal bloom which frequently breaks out.

A manufacturing method for plums preserving agent, the present invention relates to a fruit preserving agent, specific manufacturing method for plums preserving agent. For preserving plums at present, one is putting preserving agent into package box or bag, the other is adopting low temperature storage. Because the current preserving agent contains noxious components, and low temperature storage affects the fruit shelf quality. The present invention includes the proportion of raw materials and manufacturing technology for preserving agent. The raw materials includes potassium permanganate, calcium hydroxide, ferrous sulfate, calcium oxide, sodium hypochlorite, anhydrous calcium chloride, zinc oxide, ascorbic acid, and sodium polyacrylate etc., zeolite as the carrier, in proportion mixed, crushed, stirring uniform and then sieving. Adding little water makes granule. The preserving agent made by this invention can adjust oxygen and carbon dioxide concentration around the fruits, decrease ethylene content, thus inhibiting fruits respiratory, delaying ripening, and reaching preservation purposes. The present invention method is simple, easy to implement, having obvious active effects compared with current products.

A method for recovering triethylamine from triethylamine hydrochloride aqueous solution comprises allowing calcium oxide and the triethylamine hydrochloride to react, and distilling at 50-150 DEC C to obtain the triethylamine; adding the calcium oxide into the collected triethylamine, refluxing under heating to remove water, and distilling to collect the triethylamine having water content smaller than 0.5%, distilling to obtain the triethylamine, separating solid from a turbid aqueous solution residual in a reaction kettle, adjusting the pH value of the aqueous solution to 7 with hydrochloric acid, and removing water to respectively obtain calcium chloride hexahydrate, calcium chloride dehydrate and anhydrous calcium chloride; and allowing the calcium oxide after drying the triethylamine and the triethylamine hydrochloride to react to obtain the triethylamine. Compared with the prior method for recovering the triethylamine from the triethylamine hydrochloride aqueous solution, the method has the advantages of simple operation, low price, high recovery rate, and no three wastes discharge.

The invention discloses a water vapor diffusion coefficient unsteady state measurement device and a method thereof. The device comprises a constant-temperature constant-humidity box, an organic glass box, a forced convection device, a capacitor type relative-humidity sensor, a data acquisition unit and a computer, wherein the constant-temperature constant-humidity box is used for providing a high-relative-humidity environment; the organic glass box internally contains anhydrous calcium chloride and is used for providing low relative humidity; the forced convection device is used for balancing the relative humidity of a tank interior; the capacitor type relative-humidity sensor is used for determining the interior of a to-be-measured sample and the relative humidity of the environment; the data acquisition unit is used for acquiring the relative humidity determined by the relative-humidity sensor and corresponding determining time; the computer is used for combining with the Fick second law representing water vapor unsteady state diffusion, and the relative humidity of the sample interior and the corresponding detection time, and utilizing Boltzmann transformation inversion problem processing to obtain a water vapor diffusion coefficient of the to-be-measured sample at different relative humidity. The water vapor diffusion coefficient unsteady state measurement device and the method thereof have the characteristics of simple structure, high measurement precision and short measurement time.

The invention relates to a preparation method of prepared rehmannia root polysaccharide, which effectively resolves the problem that the prepared rehmannia root polysaccharide is extracted from the prepared rehmannia root polysaccharide. The technical proposal for the resolution is that water with 8 times of bulkfactor is added into the prepared rehmannia root, leaching is carried out for 4 hours at the temperature of 98 DEG C to 100 DEG C, filtration is carried out, water with 8 times of bulkfactor of original drug is added in dregs, leaching is carried out for 4 hours at the temperature of 98 DEG C to 100 DEG C, water in the dregs is squeezed completely, filtration is carried out, filtrates are combined and concentrated to 0.5g / mL of raw drugs, alcohol is added and mixed to lead alcohol content to reach 80 percent, slow addition and fast mixture are carried out, depositing in alcohol is carried out for 24 hours, suction filtration is carried out, 95 percent alcohol with 4 times of bulkfactor of the drugs is used for abstersion and sedimentation and volatized till no alcohol odor is left, water is added to dissolve to 2 times of bulkfactor of the crude drugs, pH is adjusted to 8 to 9, anhydrous calcium chloride is added to lead W / V to reach 7 percent, dissolution is carried out, room temperature is applied for the placement thereof, centrifugation is carried out, supernatant is taken for concentration to thick paste, and the prepared rehmannia root polysaccharide is obtained after drying at reduced pressure of is carried out at the temperature of 95 DEG C. The anhydrous calcium chloride deprives the protein of the prepared rehmannia root polysaccharide and avoids the use of poisonous reagent, therefore, the protein deprivation efficiency reaches 50.54 percent and the preservation ratio of the prepared rehmannia root polysaccharide reaches 77.15 percent. Therefore, the preparation method has enormous economic and social benefits.

A method for comprehensively treating low-concentration ammonia-nitrogen wastewater by completely recycling is disclosed. The low-concentration ammonia-nitrogen wastewater and carbide slag or quick lime are mixed and reacted to obtain a mixed solution containing ammonia water and ammonium chloride. The mixed solution is transferred into an ammonia-water evaporative concentration tower to separate the ammonia water and thus obtain an ammonia vapor and a calcium chloride waste solution. The ammonia vapor is transferred into an ammonia-water cooler, and the calcium chloride waste solution is introduced into an aging pool for aging, and then filtered to obtain a purified calcium chloride solution; and the purified calcium chloride solution is introduced into an MVR triple-effect evaporator for evaporation, so as to obtain distilled water and a concentrated calcium chloride solution. The concentrated calcium chloride solution is introduced into a fluidized bed for spray granulation, so as to obtain an anhydrous calcium chloride product.

The invention relates to a sterilization and smell removing material, in particular to a composite material which is suitable for a refrigerator and has an actively adsorbing sterilization function. An actively adsorbing sterilization and smell removing agent comprises a component A, a component B and a component C, wherein the component A is one or more of montmorillonite, kieselguhr, zeolite and activated carbon; the component B is one or more of zinc oxide, anhydrous zinc sulfate, anhydrous cupric sulfate, silver nitrate, titanium dioxide, aluminum oxide, or negative ion powder; and the component C is one or more of anhydrous calcium chloride, anhydrous sodium sulfate and borax. The actively adsorbing sterilization and smell removing agent has the advantages of actively adsorbing bacteria and peculiar smell, killing absorbed bacteria timely, decomposing peculiar smell and prolonging service life and products.

The present invention relates to a kind of synthetic method of food spice 1,2,3,5,6-pentathiocycloheptane, the steps are as follows: firstly thiating: in a three-necked reaction flask equipped with a stirrer, a constant pressure dropping funnel, and a thermometer Add sodium tetrathiocarbonate and absolute ethanol to the mixture and stir until sodium tetrathiocarbonate is completely dissolved. Add the absolute ethanol solution of diiodomethane dropwise with a constant pressure dropping funnel within 2 hours at 25°C. Stir and react at a constant temperature of 25°C for 10 hours; second extraction: dilute the above reaction solution with water, then extract three times with cyclohexane, separate the water layer and combine the extracts, add anhydrous calcium chloride for drying; finally obtain the finished product by distillation. The invention provides an edible spice 1,2,3,5,6-pentathiacycloheptane with strong characteristic fragrance, good antibacterial activity and biological activity. The process is simple and the yield is high, and it can be safely used as a spice in It is a new type of mushroom flavor during frying, frying, cooking, frying and other cooking processes.