39results about How to "Does not involve high temperature and pressure" patented technology

The invention discloses an aerogel preparation method. The aerogel preparation method comprises the following steps of immersing gel into a solvent, putting the gel solution into a vacuum tank, and carrying out vacuum-pumping so that the solvent is evaporated in vacuum and after the solvent is completely evaporated, aerogel is obtained. The aerogel preparation method is a fast drying method. In vacuum-pumping, the solvent in the gel is fast volatilized so that a large amount of heat is taken away and a system temperature is reduced; reactivity of active groups in a gelskeleton is reduced; and irreversible collapse possibility is reduced. The gelskeleton has strong rigidity at a low temperature so that a gel structure is kept well. The aerogel obtained by the aerogel preparation method has low density, large porosity and a high specific surface area, and has standard features of aerogel prepared by a supercritical method.

The invention provides a water-based dust depressor and a preparation method thereof. The dust depressor is prepared through water solution copolymerization, the dust depressor comprises 6-25 parts of unsaturated acid; 2-10 parts of unsaturated esters; 0.1-0.5 part of cross-linking agent; 0.1-2.0 parts of initiating agent and 100 parts of water; the raw materials further comprise antalkali, and the quantity of the antalkali adjusts the pH value of a reaction system to 6.0-9.0. The dust depressor is prepared by the unsaturated acid and the unsaturated esters through the water solution copolymerization technology, a shell layer can be formed on the surface of a dust particle, a good moisturizing function and a dust depressing function are achieved, and an obtained product contains neither volatile low-molecular compounds nor corrosive high valence metal ions. The prepared chemical dust depressor can be used by being diluted with water and sprayed, the comprehensive performance is good, and the safety and environmental protection are achieved.

The invention relates to the technical field of an organic semiconductor material, and provides a preparation method of a high thermal conductivity graphene thin film. The preparation method comprises the following steps: preparing expanded graphite; mixing the obtained expanded graphite and an organic solvent; carrying out ultrasound dissociation on an expanded graphite organic solvent mixed liquid so as to obtain a graphene microchip suspension liquid; and preparing a graphene thin film by using the graphene microchip suspension liquid. The preparation method has the following advantages that the preparation method is suitable for low-cost industrial large-scale production of the high thermal conductivity graphene thin film, does not refer to high temperature and high pressure and is low in energy consumption; the oxidation-reduction process is not adopted, the lattice structure of the graphene is not damaged, and the obtained product has high thermal conductivity; and meanwhile, as the oxidation-reduction process is not adopted, acid-base or other poisonous effluent is not generated, and the organic solvent can be repeatedly used and is environment-friendly.

The invention discloses a construction dust depressor and a preparation method thereof. According to the dust depressor, unsaturated carboxylic acid, unsaturated sulfonic acid and unsaturated polyether are adopted as monomer raw materials, a neutralizer and an initiator are adopted as auxiliary raw materials, and the dust depressor is prepared through an aqueous solution copolymerization technology. Ionic stability of the dust depressor is improved through the non-ionicity of unsaturated polyether monomers, the adaptability of the dust depressor to cement, concrete and residue soil dust is improved, and the prepared dust depressor can be diluted with water to be sprayed and used and is good in comprehensive performance, safe and environmentally friendly.

The invention discloses a food raw material rich in slowly digestible and resistant starch as well as a preparation method and application of the food raw material. According to the method, firstly, alcohol precipitation starch is prepared, and then molten liquid fatty acid is added for a kneading reaction. The method specifically comprises the following steps: (1) heating and gelatinizing starchmilk; (2) dropwise adding anhydrous alcohol into the gelatinized starch obtained in the step (1) to obtain alcohol precipitation starch; and (3) adding molten liquid fatty acid into the alcohol precipitation starch obtained in the step (2), and carrying out the kneading reaction to obtain the food raw material with the slowly digestible and resistant starch content of 80% or above. The method hasthe characteristics of mild reaction conditions, simple operation, environmental protection, recyclable raw materials and the like, and can be widely applied to the fields of food and the like.

The invention discloses a synthesis technology of a novel cosmetic antibacterial agent (ethylhexylglycerin), which is suitable for industrial production. The synthesis technology at least comprises the following steps: step one, carrying out condensation reactions: mixing isooctanol and alkali, adding a phase transferring agent, dropwise adding epoxy chloropropane to carry out reactions in a cooling condition, washing, and layering to obtain an intermediate (1); step two, performing ring-opening reactions: mixing the intermediate (1) with a ring-opening agent, heating to carry out reactions, washing, and layering to obtain a coarse product (2); step three, refining: making the coarse product (2) go through a rectifying column to carry out separation to obtain qualified product (ethylhexylglycerin). The provided synthesis technology has the characteristics of short synthesis route, low cost, high yield, and high product quality.

The invention provides a preparation method of a quantum dot semi-interpenetrating network lithium-sulfur battery composite cathode material. The preparation method comprises the following steps: dispersing aluminum isopropoxide, polyacrylamide and graphene in isopropanol, thus obtaining dispersed glue solution; mixing zinc acetate, oleic acid and 1-octadecene, injecting a sulfur source and performing reaction, adding a sulfur elemental substance and a carbon source, dispersing at a high speed, further cooling, cleaning with deionized water and drying, thus obtaining a quantum dot ZnS / S / C compound; and adding the quantum dot ZnS / S / C compound into the dispersed glue solution, stirring for 1-2 hours, then performing spray drying, and performing de-polycondensation on aluminum isopropoxide inpresence of water to obtain a semi-interpenetrating network ZnS / S / C compound formed by alumina sol and polyacrylamide gel, thus the quantum dot semi-interpenetrating network lithium-sulfur battery composite cathode material is obtained. The preparation method provided by the invention adds sulfur and carbon in a process that zinc sulfide quantum dots are formed, and quantum dot sulfide and the sulfur elemental substance are combined, so that full participation of sulfur in electrolyte reaction is guaranteed, polysulfide shuttling is prevented, and volume expansion deformation is effectively prevented.

The invention provides a synthesis process for industrially producing daidzein. The synthesis process of the invention has simple raw material and easy operation, can realize standard process flow. When the synthesis process is used in industrial production, the whole reaction condition is very moderate compared to other organic synthesis conditions, and the production process is finished only by using the conventional chemical equipment without requiring high temperature and high pressure, and the period is short. In the synthesis process, the yield of the daidzein is over 50%, the yield of the daidzein with purity of over 98% is over 60% and the purity is over 98%.

The invention discloses environment-friendly biology liquid fuel and a preparation method of the environment-friendly biology liquid fuel. The environment-friendly biology liquid fuel is composed of, by weight, 55% to 75% of animal and vegetable oil, 15% to 20% of carbon 5, 10% to 12% of methylal, 5% to 10% of fatty acid methyl ester, 0.5% to 3.0% of triethylamine, 0.1% to 2.0% of smell masking agents and 0.05% to 1.5% of hydrazine. The preparation method of the environment-friendly biology liquid fuel includes the steps of firstly, taking the animal and vegetable oil, the methylal and the fatty acid methyl ester according to the mass ratio and fully mixing the animal and vegetable oil, the methylal and the fatty acid methyl ester; secondly, weighing the carbon 5 and the hydrazine according to the mass ratio and fully mixing the carbon 5 with the hydrazine; thirdly, mixing the mixed liquor obtained in the first step with the mixed liquor obtained in the second step; fourthly, sequentially adding the triethylamine and the smell masking agents according to the mass ratio and completing the preparation after the mixture is fully stirred and mixed. The key indicators of the product are up to the national standard for light diesel oil, and therefore the environment-friendly biology liquid fuel can not only be used as boiler fuel, but also be used as power fuel.

The invention relates to a method for preparing an aromatic aldehyde / ketone compound based on photoelectrocatalysis. A reaction system is included and comprises an anode solution obtained by mixing a compound in formula I and an acid solution of metal ions, a cathode solution, namely, an acid solution, an anode, namely, a photocatalyst film electrode, a cathode Pt and a reference electrode, namely, mercury-mercurous sulfate; the reaction system carries out a reaction for 1-8 h at the bias voltage of -0.3 V-0.9 V and at the temperature of 10-70 DEG C, then the anode solution is extracted, an organic phase is purified to obtain the compound in formula II, an inorganic phase is utilized cyclically, and a cathode product is hydrogen. The formulas are shown in the specification. Alkylated aromatic is indirectly and selectively oxidized into corresponding aldehyde / ketone through the photoelectrocatalysis technology and meanwhile hydrogen is generated by the cathode. Photoproduction electrons are separated from a hole through an optical excitation semiconductor, and the hole has the strong oxidizing property. Ce3+ or Mn2+ is oxidized into Ce4+ or Mn3+ in an aqueous solution through the photoproduction hole, the alkylated aromatic is oxidized into corresponding aldehyde / ketone through high-valence Ce4+ or Mn3+, and Ce4+ or Mn3+ is reduced into Ce3+ or Mn2+ to form a cycle. Meanwhile, H+ of H2O can be reduced into H2 through the photoproduction electrons.

The invention relates to an industrial process control experimental device capable of acquiring a non-minimum phase characteristic and a method, and belongs to the experiment and teaching field of industrial automation and process control technologies. The industrial process control experimental device is composed of a controlled object unit and a computer control unit, and is characterized in that the controlled object unit is composed of a first motor speed regulation device, a first air blower, a second motor speed regulation device, a second air blower, a first electric actuating mechanism, a first regulating baffle, a second electric actuating mechanism, a second regulating baffle, an air heater, a tee joint, an air thermometer and an air flow meter; and the computer control unit is a PLC / DCS. The method comprises the steps of designing a single-circuit controller by taking the frequency of the second motor speed regulation device or the opening degree of the second regulating baffle as a controlling variable and taking the normal-temperature air flow as a controlled variable; constituting a non-minimum phase controlled object by taking the frequency of the first motor speed regulation device or the opening degree of the first regulating baffle as a controlling variable and taking a medium-temperature air flow temperature as a controlled variable, and designing a controller which is suitable for the non-minimum phase controlled object.

The invention provides a method for preparing 1,3-propylene glycol by means of methyl 3-methoxypropionate, and relates to the field of chemical synthesis. Aiming at the problems that for an existing method, the technology condition is high, a reaction is harsh, and operation is complex, methyl 3-methoxypropionate serves as the main raw material, methyl 3-methoxypropionate is obtained through a hydrogenation reaction, demethylation is conducted, and reaction is conducted with hydroiodic acid, a target product 1,3-propylene glycol and methyl iodide are obtained, methyl iodide is subjected to catalytic cracking finally, and hydroiodic acid is obtained, wherein hydroiodic acid is reused in the demethylation process. For the whole scheme, the synthetic route is short, reaction selectivity is good, the cost is low, the yield is high, the quality is high, raw material resources are simple, the method does not refer to high temperature and high pressure, the technology is safe and reliable, operability is high, and the influence on the environment is low.

The invention belongs to the field of lignin recycling, and particularly relates to a method for degrading lignin in papermaking black liquor. The method includes steps of (1), extracting the lignin in the papermaking black liquor; (2), adding the lignin extracted at the step (1), a catalyst and aqueous solution into a reaction device according to appropriate proportions and carrying out degradation reaction. The catalyst is imidazole phosphotungstate. The method has the advantages that the imidazole phosphotungstate is used as the catalyst for carrying out the degradation reaction on the lignin extracted from the papermaking black liquor, high-temperature, high-pressure and strongly alkaline environments can be omitted in the integral degradation reaction, the high degradation rate stillcan be guaranteed under mild degradation reaction conditions, the method has low requirements on equipment and is favorable for industrially treating the papermaking black liquor on a large scale, andenergy consumption can be reduced to a great extent; the imidazole phosphotungstate which is the catalyst is non-volatile, has a low melting point, is provided with organic-inorganic hybrid structures and is soluble, and accordingly the catalyst is high in efficiency, easy to recycle and good in reusability.

The invention provides a silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material, a preparation method and an application thereof. The technical scheme is that the preparation method comprises the following steps: mixing and grinding a carbon tube and elemental sulfur, adding CS2 and fully stirring, after that, drying to obtain a carbon tube sulfur-loaded composite material; and mixing the carbon tube sulfur-loaded composite material with carbon black and polyvinylidene fluoride according to a certain mass ratio, then adding N-methylpyrrolidone and the silicon-based molecular sieve, stirring and performing ultrasonic dispersion to be uniform, controlling the viscosity to be 1,000 to 10,000cps to obtain slurry, uniformly coating the obtained slurry on acurrent collector aluminum foil with a thickness of 150 to 400mm, then transferring the aluminum foil to a drying oven at 40 to 60 DEG C to obtain the silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material. The preparation method disclosed by the invention is simple to operate and easy for large-scale production; the prepared silicon-based molecular sieve / carbon tube sulfur-loaded composite positive electrode material is used for a lithium-sulfur battery, so that the dissolution of polysulfide ions in liquid electrolyte in the charging and discharging process of the lithium-sulfur battery can be solved, a shuttle effect is effectively inhibited, and the coulombic efficiency and the cycling stability of the lithium-sulfur battery are improved.

The invention discloses a composite conductive monofilament and a preparation method and application thereof. The composite conductive monofilament comprises a matrix, graphene, a carbon nano tube andcarbon black. The composite conductive monofilament has a point-line-plane three-dimensional conductive network and has a permanent antistatic property, the surface resistance is 10-1000 omega, the strength is greater than or equal to 40 Mpa, the elongation is greater than or equal to 115%, the ultraviolet protection performance T(UVA)AV(%) is less than or equal to 5%, T(UVB)AV(%) is less than orequal to 5%, UPF Rating is greater than or equal to 50, the far-infrared emissivity is greater than or equal to 0.88, the half-life period is less than or equal to 2.0 seconds, and the bacteriostasisrate is greater than or equal to 97%.

The invention provides a preparation method of a metal phthalocyanine / carbon tube composite material and application thereof in a lithium-sulfur battery cathode. The preparation method comprises the steps of: mixing and grinding a carbon tube and a sulfur element, and adding CS2 for full stirring and then drying to prepare a carbon tube sulfur-carrier composite material; and mixing the carbon tubesulfur-carrier composite material with the carbon nanotube, polyvinylidene fluoride and metal phthalocyanine in a certain mass ratio, then adding N-methylpyrrolidone for stirring and uniform ultrasonic dispersion, controlling the viscosity in a range of 1000-10000 cps to obtain slurry, coating the slurry on a current collector aluminum foil with a thickness of 150-400 mm, and performing drying toobtain a metal phthalocyanine / carbon tube composite material. The preparation method of the metal phthalocyanine / carbon tube composite material is simple to operate and easy for large-scale production. The prepared composite material is used in lithium-sulfur batteries to solve the dissolution of polysulfide ions in liquid electrolyte during charging and discharging of lithium-sulfur batteries, effectively suppress the shuttle effect and improve the coulombic efficiency and the cycle stability of the lithium-sulfur batteries.

The invention discloses a method for preparing blocky silicon dioxide aerogel through ambient pressure drying by means of a co-precursor method. The preparation method includes the steps that two silicon sources A and B are selected, and an organic solvent and deionized water are added into the silicon source A and the silicon source B respectively to obtain a silicon source solution A and a silicon source solution B; acidic catalysts are added into the silicon source solution A and the silicon source solution B respectively for hydrolysis to obtain a silicon source precursor hydrolysis solution A and a silicon source precursor hydrolysis solution B; under the stirring state, the silicon source precursor hydrolysis solution B is added into the silicon source precursor hydrolysis solution A, and an alkaline catalyst is added for polycondensation to obtain wet gel, wherein the concentration of the alkaline catalyst is 0.8-1.3 mol / L; solvent exchange is conducted after the wet gel is aged, and solvent exchanged wet gel is obtained; the solvent exchanged wet gel is subjected to normal-pressure graded drying. The technical process related to the method is simple, the extra surface modification step is not needed, and the preparation period is short. A prepared sample is good in blocking property, has certain mechanical strength and can meet requirements of more special fields.

Provided are a supported bimetallic carbon-silicon composite catalyst and a preparation method and application thereof. The preparation method of the supported bimetallic carbon-silicon composite catalyst comprises the following steps of (1) rice husk breaking; (2) rice husk acid treatment; (3) rice hull pyrolysis carbonization; (4) functionalization; (5) metal loading. The catalyst is based on the concept of green chemistry, a biomass resource rice husk is utilized as the raw material of a catalyst carrier, the raw material is easy to obtain and cheap, the preparation process does not involvehigh temperature and high pressure, the reaction condition is mild, the requirement for equipment is low, and the energy consumption is greatly reduced; the catalyst preparation process is green, environmentally friendly, low-cost and reusable; (2) the prepared supported bimetallic carbon-silicon composite catalyst is applied to a benzene-methanol solvent-free selective oxidation catalytic reaction without involving other organic solvents, and is green and pollution-free; the catalyst is easy to recycle, reusableand high in catalytic activity.

The invention belongs to the field of lignin recycling, and particularly relates to a method for degrading lignin in papermaking black liquor. The method includes steps of (1), extracting the lignin in the papermaking black liquor; (2), adding the lignin extracted at the step (1), a catalyst and aqueous solution into a reaction device according to appropriate proportions and carrying out degradation reaction. The catalyst is imidazole phosphotungstate. The method has the advantages that the imidazole phosphotungstate is used as the catalyst for carrying out the degradation reaction on the lignin extracted from the papermaking black liquor, high-temperature, high-pressure and strongly alkaline environments can be omitted in the integral degradation reaction, the high degradation rate stillcan be guaranteed under mild degradation reaction conditions, the method has low requirements on equipment and is favorable for industrially treating the papermaking black liquor on a large scale, andenergy consumption can be reduced to a great extent; the imidazole phosphotungstate which is the catalyst is non-volatile, has a low melting point, is provided with organic-inorganic hybrid structures and is soluble, and accordingly the catalyst is high in efficiency, easy to recycle and good in reusability.

The invention provides a preparation method of lithium sulfide. First, under the protection of an inert atmosphere, weigh a lithium source compound and a sulfur source compound and prepare their alcohol solutions respectively, and then add the alcohol solution of the lithium source compound to the alcohol solution of the sulfur source compound In the process, centrifuge the fully reacted product after magnetic stirring, and collect the supernatant; then transfer it to a tube furnace for heating and crystallization to obtain a crude lithium sulfide product; then use N-methylpyrrolidone or acetone to wash and centrifuge the crude lithium sulfide product, collect the solid product; then use n-hexane to wash and centrifuge the solid product, and vacuum-dry to obtain lithium sulfide. Compared with the prior art, in the method provided by the present invention, the lithium source compound and the sulfur source compound are subjected to a metathesis reaction in an alcoholic solution to obtain lithium sulfide, and the obtained lithium sulfide has high purity and good reproducibility, and the preparation process does not involve high temperature High pressure, no greenhouse gas emissions, environmental friendliness, no need for complicated and expensive instruments and equipment, and easy for large-scale industrial production.

The invention discloses a polymer dispersion and a preparation method thereof. The polymer dispersion is obtained through the soap-free emulsion copolymerization technology. The polymer dispersion comprises a negative ion monomer, a non-ionic monomer, a pH buffering agent, an initiator, an antalkali and water, wherein the negative ion monomer accounts for 3-10 parts of the raw materials, the non-ionic monomer accounts for 10-25 parts of the raw materials, the pH buffering agent accounts for 0.3-1.0 part of the raw materials, the initiator accounts for 0.3-2 parts of the raw materials, and the water accounts for 100 parts of the raw materials. A proper amount of the antalkali is used for adjusting the pH value of a reaction system to range from 6.0 to 9.0. The obtained polymer dispersion is used as a dust depressor, an effective shell can be formed on the surface of dust, and the construction safety and application safety of the polymer dispersion are higher. The polymer dispersion is applied as the chemical dust depressor, can be diluted with water to be sprayed for use, and is good in overall performance, safe and environmentally friendly.

The invention relates to gadolinium-doped zinc oxide nanoparticles and a preparation method thereof. The preparation method comprises the following steps: dissolving zinc methacrylate and a gadolinium compound in a solvent, heating to obtain a colorless transparent solution, adding 0.3g of azodiisobutyronitrile and 15ml of methacrylic acid-monomethyl polyethylene glycol ester, heating, stirring for 5 minutes, and adding 0.3g of azodiisobutyronitrile and 100ml of a 0.15mol / L alkali solution; performing reflux on a mixture under the conditions of heating and stirring for 1 hour, and dialyzing and purifying in de-ionized water to finally obtain a water solution product. The method has the advantages that cheap zinc materials with good biocompatibility are adopted, a gadolinium-doped zinc oxide nanoparticle product is directly synthesized by adopting a sol-gel method, the biological toxicity of the final product is reduced, the product cost is lowered, and the product has application prospect of magnetic resonance and fluorescent bifunctional imaging.

The invention discloses a food raw material rich in slow digestion and resistant starch, a preparation method and application thereof. The method first prepares alcohol precipitation powder, and then adds molten liquid fatty acid to carry out kneading reaction, specifically comprising the following steps: (1) heating starch milk to gelatinize; (2) adding absolute alcohol dropwise to the gelatinized starch in step (1) (3) adding molten liquid fatty acid to the alcohol precipitation powder obtained in step (2) for kneading reaction to obtain food raw materials with slow digestion and resistant starch content of more than 80%. The method has the characteristics of mild reaction conditions, simple operation, environmental protection, recyclable raw materials, etc., and can be widely used in food and other fields.

The invention discloses a synthetic method of novel liquid crystal material 3-butoxy-N,N-dimethylpropanamide. The synthetic method comprises following steps at least: step 1, condensation reaction, wherein n-butyl alcohol is mixed with an alkali, N,N-dimethylpropanamide is added dropwise at heating conditions for reaction, and a crude product (1) is obtained after a certain time of reaction; and step 2, refining, wherein the crude product (1) is subjected to heating and vacuum rectifying column separation so as to obtain qualified product 3-butoxy-N,N-dimethylpropanamide. Raw material source of the synthetic method is simple; high temperature and high pressure are not needed; the synthetic method is safe and reliable; operationality is high; and influence on the environment is less.

The invention discloses environment-friendly biology liquid fuel and a preparation method of the environment-friendly biology liquid fuel. The environment-friendly biology liquid fuel is composed of, by weight, 55% to 75% of animal and vegetable oil, 15% to 20% of carbon 5, 10% to 12% of methylal, 5% to 10% of fatty acid methyl ester, 0.5% to 3.0% of triethylamine, 0.1% to 2.0% of smell masking agents and 0.05% to 1.5% of hydrazine. The preparation method of the environment-friendly biology liquid fuel includes the steps of firstly, taking the animal and vegetable oil, the methylal and the fatty acid methyl ester according to the mass ratio and fully mixing the animal and vegetable oil, the methylal and the fatty acid methyl ester; secondly, weighing the carbon 5 and the hydrazine according to the mass ratio and fully mixing the carbon 5 with the hydrazine; thirdly, mixing the mixed liquor obtained in the first step with the mixed liquor obtained in the second step; fourthly, sequentially adding the triethylamine and the smell masking agents according to the mass ratio and completing the preparation after the mixture is fully stirred and mixed. The key indicators of the product are up to the national standard for light diesel oil, and therefore the environment-friendly biology liquid fuel can not only be used as boiler fuel, but also be used as power fuel.

The invention belongs to the field of chemical engineering and environment protection and particular and particularly relates to a treatment method for rubber waste water. The rubber waste water is mixed with ethylene high salt waste water for treatment. The treatment method includes the following steps: performing hydrolytic acidification under the effect of facultative bacteria, performing air aeration, and then performing contact oxidization with a bio-membrane attached on a semi-soft filler, and finally performing biological aerated filter tank treatment. In the method, nutritional substances, such as nitrogen and phosphorus, being rich in the high salt waste water are fully utilized, so that operation cost is greatly reduced. Air aeration is employed, so that operation cost is reduced and establishment of nitrification is promoted, thus completely removing ammonia nitrogen in the waste water. The rubber waste water is 400-500 mg / L in COD and is 50-55 mg / L in NH3-N; and by means of the method, discharged water is 34.2-48.4 mg / L in COD, which can stably reach the discharge standard being less than 50 mg / L; and meanwhile, the discharged water also reaches the discharge standard of NH3-N being less than 5 mg / L.

The invention discloses a process method for preparing ammonia borane from boroxol acid ammonium through electrochemical reduction in a recycling manner. According to the process method, electrochemical reduction is carried out by virtue of a three-dimensional negative electrode with relatively high hydrogen overpotential under an electrochemical reduction principle based on ammonia borane hydrolysate ammonia metaborate as a raw material, so that conversion of boroxol acid radical ions into borone hydrogen acid radical ions is promoted. White floppy ammonia borane solid can be prepared through operation steps such as boroxol acid ammonium electroreduction, freeze-drying dehydration, dissolution backflowing, centrifugal treatment, rotation evaporation, crystallization and the like. The process method is gentle in preparation condition, short in process, low in energy consumption, simple and convenient to operate, free of waste discharge and free of environment pollution, and the raw materials which are byproducts generated from hydrolysis hydrogen release of ammonia borane are low in price and easily available. In addition, due to adoption of an appropriate electrode material, the current efficiency of electroreduction of a negative electrode chamber to generate hydroboron can be improved.

Industrial process control experimental devices and methods capable of obtaining non-minimum phase characteristics belong to the experimental and teaching fields of industrial automation and process control technology. It is composed of a controlled object unit and a computer control unit; the controlled object unit consists of a first motor speed regulating device, a first blower, a second motor speed regulating device, a second blower, a first electric actuator, a first adjusting baffle, It consists of a second electric actuator, a second adjusting baffle, an air heater, a tee, an air temperature meter and an air flow meter; the computer control unit is a PLC / DCS control system; based on the frequency of the second motor speed control device or the second Adjust the baffle opening as the control variable, and use the normal temperature airflow flow as the controlled variable to design a single-loop controller; use the frequency of the first motor speed control device or the first adjusting baffle opening as the control variable, and use the medium-temperature airflow temperature as the controlled variable. The controlled variable is used to form a non-minimum phase controlled object; a controller suitable for the non-minimum phase controlled object is designed.

A process for preparing ammonia borane by recycling the electrochemical reduction of ammonium borate, using ammonia borane hydrolysis product ammonium metaborate as the raw material, and according to the principle of electrochemical reduction, electrolytic reduction is carried out with the help of a three-dimensional cathode with a high hydrogen overpotential, which can Promote the transformation of boronate ions into borohydride ions. Through electrolytic reduction of ammonium borate, freeze-drying and dehydration, dissolution and reflux, centrifugation, rotary evaporation and crystallization, a white and loose ammonia borane solid was prepared. The method has mild preparation conditions, short process, low energy consumption, simple operation, no waste discharge, and no environmental pollution. The raw material used belongs to the by-product of ammonia borane water decomposing hydrogen, and is cheap and easy to obtain. Moreover, due to the adoption of appropriate electrode materials, the current efficiency of borohydride generated by electrolytic reduction in the cathode chamber can be improved.

The invention relates to an industrial waste liquid regenerant and a preparation method thereof. The regenerant is prepared by adjusting copolymerization of the following raw materials through an aqueous solution, and the regenerant is prepared from, by weight, 10-20 parts of unsaturated acid, 10-20 parts of unsaturated amide, 0.5-5 parts of a molecular weight regulator, 0.1-2.0 parts of an initiator, and 100 parts of water. A dust suppressant is prepared by adopting unsaturated acid and unsaturated amide through an aqueous solution regulation copolymerization technology, various metal ions are promoted to flocculate and settle through coordination and crosslinking of the metal ions, separated floccules can be used as an industrial raw material, and recycled acid liquor is locally returnedand reused. The preparation method is simple in preparation process, good in comprehensive performance, safe and environment-friendly.