54 results about "Salt sodium" patented technology

The invention relates to an inorganic hydrated salt expanded graphite composite phase-changing heat storage material. In the preparation method thereof, 85-89 mass parts of inorganic hydrated salt sodium acetate trihydrate as a heat storage matrix, 5.5-6.5 mass parts of disodium hydrogenphosphate as a nucleating agent, 2.5-3.5 mass parts of carboxymethyl cellulose as a thickening agent, and 3-4.5 mass parts of expanded graphite is blended in an inorganic hydrated salt mixture as a material with a high thermal conductivity. Due to the use of the expanded graphite, the material not only maintains excellent properties of natural flake graphite such as good thermal conductivity, no toxicity and the like, but also has adsorbability which the natural flake graphite does not have. The invention solves the problems of sub-cooling degree, phase stratification and low thermal conductivity during the heat storage process. The composite phase-changing material has a low sub-cooling degree after the phase changing performance is improved, the solution thereof is uniform without sedimentation and stratification during the solid-liquid phase change, the performance is stable, the repeatability of good, and the phase-changing heat storage can be enhanced through improving the thermal conductivity of the material.

The invention discloses a preparation method for a supercapacitor material MoO2/graphene/g-C3N4, and belongs to the technical field of composite material preparation. The method comprises the following steps: 1), scattering oxidized graphene into deionized water, employing a cell pulverizer for smashing, adding mixed solution composed of a molybdenum salt precursor and an end-capping reagent, carrying out the stirring of the mixed solution, enabling the mixed solution to be uniform, and obtaining an oxidized graphene-molybdenum salt-sodium salt mixed solution system; 2), adjusting pH value andthen carrying out the hydro-thermal reaction in a reaction still; 3), employing water and ethyl alcohol for cleaning, carrying out the low-temperature vacuum drying, and obtaining an MoO2 composite oxidized graphene material; 4), mechanically mixing the MoO2 composite oxidized graphene material with a carbon and nitrogen precursor, carrying out the high-temperature calcination of the mixture under the protective atmosphere of high temperature argon gas, cooling the mixture to the room temperature, and then obtaining the MoO2/graphene/g-C3N4 composite material. The method is simple and feasible, and is low in cost. The specific capacity of an obtained composite material supercapacitor is remarkably enlarged, and the composite material supercapacitor is good in cyclic charging and discharging stability.

The invention discloses a process for preparing high-purity methylsulfonic acid. The process comprises the following steps: generating methylsulfonic sodium in a mixed reactor by the reaction of a sodium sulfite solution and monochloro methane at the temperature of 70-110 DEG C, then adding concentrated hydrochloric acid after dewatering, and generating a methylsulfonic acid solution and a corresponding sodium chloride salt precipitate; distilling off a hydrochloric acid solution from filtrate obtained after filtering sodium chloride salt, then distilling off acid water by depressurization, decompressing and distilling to obtain the methylsulfonic acid with high yield and high purity. The filtered salt sodium chloride can be used as a raw material for industrial electroanalysis, all the water which is distilled out is recovered as an assistant material, and the recovered hydrochloric acid solution is recovered for circular mechanical application. The invention has no pungent odor, no generation of waste water and waste residues, single reaction, easy acquirement of raw materials, simple operation and low cost, is suitable for industrialized scale production and is an environment-friendly industrialized process for preparing the high-purity methylsulfonic acid.

The invention discloses a portable electrolytic salt sodium hypochlorite generator suitable for various kinds of disinfection in disaster areas. An ion membrane electrolysis cell is arranged and provided with a switching power supply. The ion membrane electrolysis cell is connected with a salt liquor metering pump, an alkaline liquor metering pump, a hydrogen separator and a chlorine separator. A soluble salt tank is connected with the salt liquor metering pump and the chlorine separator. An alkaline liquor tank is connected with the alkaline liquor metering pump and the hydrogen separator. A chlorine absorber is connected with the chlorine separator and an activated carbon tank. The activated carbon tank is connected with a vacuum pump. A reverse osmosis water purifier is arranged on a pure water tank. The pure water tank is connected with the ion membrane electrolysis cell. A bipolar type electrode structure is adopted in the electrolysis cell, so that the size of the electrolysis cell and the size of the switching power supply are reduced; the quality of salt liquor and alkaline liquor in the electrolysis cell is guaranteed through the reverse osmosis water purifier; and safe backflow of light salt brine is guaranteed through the soluble salt tank, safe backflow of high-concentration alkaline liquor is guaranteed through the alkaline liquor tank, and by means of the activated carbon tank and the vacuum pump, the chlorine separation efficiency and the absorption effect are ensured, and chlorine leakage is avoided.

The invention discloses a zero-emission resource recycling method of high-salt sodium sulfate wastewater. The method comprises the following steps: 1) removing noncondensable gas from a gas phase space, gasifying water in sodium sulfate wastewater through pressure difference, enabling the gasified water to flow to the surface of lithium bromide solution through a gas phase channel, and evaporating, cooling, concentrating and crystallizing the high-salt sodium sulfate wastewater; 2) separating mirabilite and mother liquid from crystal mush, carrying out heat exchange and concentration on the mother liquid to obtain concentrated mother liquid and fresh water; feeding the concentrated mother liquid and new sodium sulfate wastewater together into a crystallizer and then repeating the steps 1) and 2); and 3) pumping the diluted lithium bromide solution into an evaporator, heating for evaporating to form concentrated lithium bromide solution, and returning the concentrated lithium bromide solution back into an absorber. According to the method disclosed by the invention, evaporation and crystallization are completed at a low temperature, no low-temperature clod source or septate heat exchange equipment, and therefore the energy consumption is lowered. By the method, mirabilite which is the crystallization product and fresh water can be recycled; furthermore, the aim of zero-emission resource recycling of high-salt sodium sulfate wastewater is achieved and the whole process is easy to operate.

The invention discloses an amide quaternary ammonium salt sodium hydroxypropyl sulfonate asphalt emulsifier and a preparation method thereof. The asphalt emulsifier is prepared from coconut oil acyl propyl dimethyl tertiary amine, alcohol solvent, acrylic acid, epoxy chloropropane and sodium hydrogen sulfite according to a molar ratio of 1mol:(4.00-9.00)mol):(1.00-1.10)mol:(1.0-1.15)mol:(1.05-1.25)mol, wherein the alcohol solvent is alcohol, methanol or isopropanol. The asphalt emulsifier is easy-to-obtain in synthesis raw materials, low in production cost, simple in process and needless of high-temperature reaction and can emulsify asphalt different in type, emulsified asphalt prepared by using the asphalt emulsifier is exquisite, uniform and high in storage stability, and cationic emulsified asphalt can be prepared.

The invention discloses a method for coproducing sodium chloride by using micro barium sulphate prepared by barium chloride, which is technically characterized in that: reacting the barium chloride and sodium sulphate according to certain proportion to obtain micro barium sulphate and sodium chloride after filtration; filtering the micro barium sulphate and sodium chloride to obtain filter cake, washing, drying, grinding, and packaging into micro barium sulphate products; and distilling the filtrate under reduced pressure to obtain industrial salt sodium chloride products. The method is simple and concise, and particularly uses low-grade barium chloride and sodium sulphate to produce high-grade precipitated barium sulphate, the production technology and equipment are simple, the productivity is extremely high, and the profit is high.

The invention relates to an environmentally-friendly gold extracting agent and a preparation method thereof, belonging to the technical field of gold production. The environmentally-friendly gold extracting agent comprises sodium carbonate, urea, and yellow prussiate of soda. The preparation method comprises the following steps of: uniformly mixing the raw materials according to a certain proportion, heating the mixture to 800-850 DEG C in a closed container, keeping for a certain period of time, then pouring the mixture into an open container, and naturally cooling the mixture to obtain the environmentally-friendly gold extracting agent. The environmentally-friendly gold extracting agent can completely replace sodium cyanide and is suitable for the recovery and utilization of gold in gold-bearing oxidized ore and gold-bearing tailings. Compared with other agents, the environmentally-friendly gold extracting agent has the characteristics of low production cost, simple production method, strong applicability, environmental protection, good economic benefits and the like.

The invention provides a plant salt. The content of sodium in the plant salt is 15.26-15.55%, and the content of potassium in the plant salt is 3.4-3.6%. The invention further provides a method for extracting the plant salt from suaeda salsa through a hot extraction technology via the synergy of ultrasonic waves and microwaves. The method comprises the following steps of selecting raw materials and assisting hot extraction through synergy of the ultrasonic waves and the microwaves. The plant salt disclosed by the invention has the beneficial effects that the content of the sodium in the extracted plant salt is 15.26-15.55%, the content of the potassium is 3.4-3.6%, the content of Ca is 2660-2680 mg/kg, the content of Fe is 690-707 mg/kg, and the yield of the extracted plant salt is high and is 11.4-11.9%; the extracted plant salt has antioxidative activity, the content of flavone is 2.62-2.7 mg/g, and the whole antioxidative activity FRAP value is 0.7-0.89 mmol/100g.

The invention discloses an intermittent electrolytic salt sodium hypochlorite generator suitable for small water supply projects in rural areas. An electrolytic tank is arranged. An electrolysis electrode is fixed to the low end in the electrolytic tank. A cooling pipe is fixed to the upper portion of the electrolytic tank. An alternating current power supply switch, a direct current switching power supply and a direct current inverse-electrode switch are connected in series through a cable to be then connected with the electrolysis electrode. A reverse osmosis water purifier is communicated with the electrolytic tank through a pipe. The arranged cooling pipe starts cooling after electrolysis is carried out for 3-4 h, it can be effectively guaranteed that an electrolyte is stable and does not exceed 25 DEG C, and the later electrolysis condition is improved; purified water is used for preparing a salt solution so that the electrode can be effectively prevented from scaling; the same material and coating are adopted in the negative pole and the positive pole of the electrolysis electrode, the direct current inverse-electrode switch is used for alternate inverse-electrode electrolysis, and therefore scale on the electrode can be effectively removed; and the disinfectant dosage needed by the water supply projects for 1-5 days can be met when a sodium chlorate solution is produced each time. In addition, the intermittent electrolytic salt sodium hypochlorite generator is simple in structure and easy and convenient to operate and manage, and the disinfection needs of the small water supply projects in the rural areas can be met.

The invention discloses a method for synthesis of tetrazolylacetic acid using a hydrazine hydrate method. The tetrazolylacetic acid is prepared from the raw materials of triethylorthoformate, glycine,hydrazine hydrate, sodium nitrite and the like. According to the method for synthesis of tetrazolylacetic acid using the hydrazine hydrate method, the processing route of a traditional azide ester method that sodium azide is adopted as a raw material to prepare the tetrazolylacetic acid is abandoned, the safety of the production technology is improved, the production cost is low, no waste water or waste gas is generated in the whole technology, the method accords with the production requirement of green chemical, co-produced salt sodium sulfate can be sold out directly, and the production cost is further lowered. According to the method for synthesis of tetrazolylacetic acid using the hydrazine hydrate method, the synthetic route is simple, the product purity is high, the maneuverabilityand the repeatability are high, and industrial production is facilitated.

The invention provides equipment and method for slowing down salt-sodium sulfate co-production sodium sulfate flash tank scaling. The tank includes a circulation part, wherein the circulation part consists of a circulation pump, a preheater, a sodium sulfate evaporation tank, a sodium sulfate flash tank and a salt evaporation tank that are connected in order. The solid salt slurry flowing out of the salt evaporation tank is led to a salt slurry bucket, the effluent liquid is connected to the inlet of the circulation pump, the outlet of the salt slurry bucket is provided with a salt slurry pump, and the salt slurry pump conveys the salt slurry to a centrifuge through a salt slurry pump outlet pipe, and then salt can be collected. The equipment is characterized in that: the salt slurry pump outlet pipe is provided with a section of a reflux branch pipe communicated with the sodium sulfate flash tank, and the reflux branch pipe is equipped with a flow control valve. The equipment and method provided by the invention are beneficial to precipitation growth and flash operation of crystals in the sodium sulfate flash tank, can slow down the production of salt scale and prolong the operation period, and have very strong practicability.

The invention relates to a recovery method of polyphenylene sulfide byproduct salt, in particular to recovery treatment of byproduct salt sodium chloride in industrial production of polyphenylene sulfide resin, and belongs to the technical field of three-waste treatment. The technical problem to be solved by the invention is to provide a simple-process recovery method of polyphenylene sulfide byproduct salt, which comprises the following steps: putting polyphenylene sulfide byproduct salt in vacuum, keeping at 300-500 DEG C for 1.5-3 hours, adding water to dissolve the salt, and filtering by using a microporous filter to obtain a sodium chloride solution. According to the method, a vacuum dry distillation method is adopted, little tail gas is generated, the generated tail gas is easy to collect, advanced oxidation deodorization is conveniently adopted, environment-unfriendly emission is reduced, the produced sodium chloride solution is low in SS, NH3-N and COD and colorless, and pure salt can be obtained by evaporating and crystallizing the sodium chloride solution. The method is short in process, simple to operate and low in equipment requirement, and has the characteristics of low cost and low temperature.

The invention discloses a method for preparing high-quality gallium nitride nano powder. The method comprises the following steps: fully mixing and grinding metal Ga and soluble salt sodium phosphate according to the mass ratio of 1 to (2-10) at certain temperature, and then nitriding the mixture with ammonia gas at 750-1050 DEG C for 2-4 hours; repeatedly washing the nitrided mixture to wash off sodium phosphate by using distilled water to finally obtain pure high-quality gallium nitride nano powder, wherein the diameters of the particles are 10-30nm. Particularly, the obtained product is gallium nitride powder with high crystallinity in a hexagonal phase structure when nitriding is performed at over 850 DEG C. The method has positive effects of being simple, convenient, economical and environment-friendly, and can be used for preparing the high-quality gallium nitride nano powder on a large scale.

The invention relates to a method for recovering propionyl triketone and sodium chloride from clethodim decarboxylation wastewater, which comprises the following steps: adding a separating agent into the clethodim decarboxylation wastewater, and standing for layering to obtain an upper layer which is a separation phase and a lower layer which is a water phase; wherein the separating agent comprises a complexing agent, a cosolvent and a diluent; adding an alkaline solution into the separation phase, and standing for layering to obtain an upper layer which is a regenerated separating agent and a lower layer which is a sodium propionyltriketone solution; carrying out adsorption treatment on the water phase to obtain treated effluent; and evaporating the treated effluent to obtain evaporated effluent and sodium chloride. According to the method, toxic pollutants in the wastewater can be effectively recycled, the quality of subsequent evaporation salt is improved, propionyltriketone is recycled, the byproduct salt sodium chloride is obtained, wastewater recycling is achieved, and the method has the advantages of being easy to operate, high in pollutant removal rate and the like.

The invention relates to a method synthesizing nanocrystalline by the assistance of soluble salt. Soluble salt sodium sulfate Na2SO4 and soft metal are fully grinded or ball milled according to the proportion of 1 to 6-30 at a certain temperature or normal temperature and then the mixture of the soft metal and the sodium sulfate Na2SO4 is nitrided with ammonia or oxygenized with oxygen at 600 to 800 degrees centigrade for 2 to 4 hours. The nitrided or oxygenized mixture is flushed repeatedly with distilled water to wash away the sodium sulfate and obtain pure nanocrystalline powder. The method is simple, convenient, economical and environment-friendly, can be used to prepare the nanocrystalline massively and at the same time provides a universal thinking for synthesizing low melting point soft metal compound nanocrystalline in large quantity.