97 results about "Sodium carbonate decahydrate" patented technology

The invention relates to a phase transition temperature adjusting cup, which comprises a cup body outer casing, a cup body inner casing and a top cover, and the composite phase transition material is filled between the inner casing and the outer casing. The composite phase transition material comprises phase transition material, a nucleating agent, heat conduction filling material and a thickening agent. The phase transition material is selected from one or more of sodium acetate trihydrate, sodium thiosulfate pentahydrate, twelve disodium hydrogen phosphate, sodium sulfate decahydrate and decahydrate. <{EN4}>The nucleating agent is selected from one or more of borax, sodium phosphate dibasic anhydrous, diatomaceous earth, silica, sodium silicate, eight water strontium hydroxide, hexahydrate chloride strontium. <{EN5}>The heat conduction filling material is selected from one or more of graphite, carbon nanotube, expanded graphite, carbon fiber, graphene, three-dimensional graphite foam, silicon carbide, copper powder. <{EN6}>The thickening agent is selected from one of polyacrylic acid emulsion or carboxymethylcellulose sodium. <{EN7}>Compared with existing temperature adjusting cups, the phase transition temperature adjusting cup of the present invention has the advantages of rapid cooling, simple structure convenient operation, 3-4 hours of comfort temperature zone, and not being restricted from external environment.

The invention relates to a preparing method of an inorganic hydrous salt phase change microcapsule energy-storage material and belongs to preparing methods of energy-storage materials. The energy-storage material comprises a core material and a wall material, wherein the core material is prepared from one or more of calcium chloride hexahydrate, sodium sulfate decahydrate, sodium thiosulfate pentahydrate, disodium hydrogen phosphate dodecahydrate, sodium acetate trihydrate and sodium carbonate decahydrate inorganic hydrous salt, and the wall material is prepared from one or more of polystyrene, polymethyl methacrylate, poly(ethyl acrylate), polyurethane, cellulose acetate butyrate (CAB) and a diphenylmethane diisocyanate polymer, the core material accounts for 30-80% of the microcapsule energy-storage material by mass, and the wall material is prepared from the polymer and accounts for 20-70% of the microcapsule energy-storage material by mass. The phase change point of the obtained phase change microcapsule energy-storage material ranges from 20 DEG C to 90 DEG C, and the particle size ranges from 1 micrometer to 100 micrometers. The phase change microcapsule energy-storage material prepared with the method is high in encapsulation rate, good in sealing performance, large in phase change latent heat value, simple in preparing method and large in industrial application prospect.

A process is provided for recovering sodium chloride crystals and sodium carbonate decahydrate crystals from a concentrated brine that results from a gas mining operation where gas and produced water is recovered and the produced water constitutes a brine. An initial pre-concentration process is carried out where the brine is concentrated and in the process carbon dioxide is removed from the brine and at least some sodium bicarbonate is converted to sodium carbonate. In one process, the concentrated brine is directed to a sodium chloride crystallizer where the brine is heated and further concentrated to form sodium chloride crystals which are separated from the brine to yield a product and wherein the resulting brine is termed a first mother liquor. The first mother liquor is then directed to a sodium carbonate decahydrate crystallizer where the first mother liquor is cooled and concentrated resulting in the formation of sodium carbonate decahydrate crystals and a second mother liquor. The second mother liquor is split into two streams where one stream is directed back to the sodium chloride crystallizer while the other stream is wasted or further treated.

This invention describes a process for the recovery and recycle of industrial waste solids, especially the salt-alkali separation and recycle of the waste salt-alkali solids from the manufacturing of hydrated nitriles. This invention uses water, mother liquid and sodium bicarbonate to wash the waste salt-alkali solids from the manufacturing of hydrated nitriles, so that Na2CO3 and NaOH in the waste salt-alkali solids are washed into the solution. The washing solution is then cooled to 0-5deg.C, and filtrated and separated to obtain solid sodium carbonate decahydrate, which can be commercialized after washing. The mother liquid, after separating the solid alkali, is directed to the next process for washing the waste salt-alkali solids without discharge. During the circulatory washing of the waste salt-alkali solids, the table salt keeps in the solid state. After centrifugal separation, the table salt containing 3% of alkali can be obtained and used for sodium carbonate industry. The said table salt NaCl, after washing and separation to remove a small amount of hydrazine and amine, can be used for chlorine-alkali industry. Chlorine Cl2 and sodium hydroxide NaOH are raw materials for sodium hypochlorite NaClO, which is a raw material for producing hydrazine hydrate. In addition, sodium hydroxide is directly involved in the reaction for producing hydrazine hydrate N2H4íñH2O, thus constituting an internal recycling system of a manufacturing plant without discharging, which not only is environmentally friendly but also reduces transportation load and production cost. This invention describes a rational process for large-scale hydrazine hydrate manufacturing plants.

The invention relates to a high-salinity coal mine water standard treatment and resource utilization device and a use method thereof. The device comprises a homogenizing adjusting tank, a high-densityclarification tank, a gravity type filter tank, a sodium bed device, an ultrafiltration device, a reverse osmosis device, a recycled water tank, an ozone reaction tank, a concentrated water high-density clarification tank, a multi-media filter, a concentrated water weak acid resin bed, a concentrated water ultrafiltration device, a nanofiltration device, a nanofiltration produced water reverse osmosis device, a strong brine tank, a nanofiltration produced water evaporation concentration device, a sodium carbonate decahydrate freezing crystallization device, a sodium chloride evaporation crystallization device, an impure salt crystallization device, a nanofiltration concentrated water tank, a nanofiltration concentrated water evaporation concentration device, a sodium sulfate decahydrate freezing crystallization device, a resin regeneration waste liquid storage tank, a calcium sulfate settling tank, a calcium sulfate dehydrator and the like. The device has the advantages that the structural design is reasonable, consumption of softening agents for mine water desalination treatment is reduced, the system reliability is improved, the additional value of salt products is increased, and maximum utilization of resources is achieved.

The invention provides a white carbon black production process for producing sodium fluoride and co-producing cryolite by using fluorosilicic acid. The production process is used for producing sodium fluoride and co-producing high-purity silicon dioxide and cryolite by using fluorosilicic acid, sodium carbonate decahydrate and aluminum hydroxide as main raw materials. The white carbon black production process provided by the invention can be used for reducing the cost of sodium fluoride and cryolite raw materials and further improving the benefits of sodium fluoride production enterprises.

The present invention discloses a process for producing biurea through an optimized urea method. The process comprises that: during the biurea preparing, the crude solution of hydrazine hydrate produced through the urea method is adopted as a raw material and is subjected to repeated evaporation concentration and freezing crystallization for a plurality of times to respectively separate out sodium chloride and sodium carbonate so as to obtain a fine hydrazine solution of the hydrazine hydrate; the sodium chloride is separated at the evaporation section and the sodium carbonate decahydrate is separated at the freezing crystallization section during each evaporation, a salt extracting pump is used to extract, and the solid sodium chloride is separated out by a salt separation centrifuge; and the liquid is subjected to freezing crystallization, is separated, and then returns to the cold hydrazine solution at the evaporation section, pre-cooling is performed, and then the obtained material is conveyed to the crystallization kettle. The process of the present invention has the following beneficial effects that: the hydrazine hydrate-containing crude solution produced through the urea method is adopted as the raw material, alkali removing through freezing is performed while the cold energy and the heat energy are recovered, the repeated circulating method is used, the hydrazine hydrate concentration is improved in the low cost manner, and the process has characteristics of less raw material consumption, less energy source consumption, low cost, and high single-kettle yield during condensation.

The invention relates to a combined process for preparing a calcined soda from a natural soda containing sodium chloride, soda and sodium sulphate, which comprises steps: (a) dissolving the natural soda to prepare an aqueous solution; (b) obtaining sodium carbonate decahydrate crystals from the natural soda solution by using a separation method of attaching crystallization; and (c) treating the obtained sodium carbonate decahydrate crystals to obtain the calcined soda. The selection to raw materials in the combined process is widened, and the associated minerals, such as sodium chloride, soda and sodium sulphate, can be separated as simple substances. The species of the obtained calcined soda and anhydrous sodium sulphate are abundant, and their purities are high. Moreover, the entire processes can be recycled, and there is no discharge of smoke, dust, waste liquid and so on.

The invention discloses a phase-change gel heat-preservation material and a preparation method thereof. The heat-preservation material comprises the following components in parts by weight: 23-48 parts of magnesium oxide, 12-35 parts of magnesium sulfate heptahydrate, 3-11 parts of paraffin, 2-10 parts of polyethylene glycol, 4-12 parts of sodium sulfafe decahydrate, 5-9 parts of calcium chloride hexahydrate, 3-9 parts of sodium carbonate decahydrate, 2-12 parts of aluminum hydroxide, 1-8 parts of hydrogen peroxide, 3-15 parts of a polypropylene fiber and 4-13 parts of a glass fiber. The phase-change gel heat-preservation material disclosed by the invention has excellent properties of heat preservation, energy storage and light weight and is high in strength and good in anti-cracking property.

A self contained laptop computer cooling pad that does not require any electrical power to operate and will effectively and efficiently reduce the operating temperature of the computer and reduce the heat being transferred into the user's lap. The cooling pad contains a phase-changing compound such as sodium sulfate decahydrate, sodium carbonate decahydrate, disodium phosphate dodecahydrate or sodium thiosulfate pentahydrate, and may be made of a soft, flexible material that will contain the phase-changing compound and prevent excess shifting within the cooling pad. The cooling pad is placed under the laptop computer when operating the computer to effectively transfer heat away from the computer by conduction and prevent passage onto the user. The cooling pad may be in the form of a sleeve to additionally provide padded storage for the computer when not in use.

The invention relates to a production technology for producing sodium fluoride from sodium fluosilicate and co-producing white carbon black. Sodium fluorosilicate and byproduct white carbon black areobtained with sodium fluorosilicate and sodium carbonate or sodium carbonate decahydrate as raw materials through steps of pulping, alkali dissolution, reaction, settling separation, drying and the like. The reaction is conducted in an ultrasonic reactor and at least one ultrasonic generator is arranged in the reactor. The technology has the advantages as follows: reactants or products cannot scaron the wall of the reactor easily, the thermal resistance of the reactor is low, the heat transfer efficiency is high, and continuous production can be realized. The separation effect on sodium fluorosilicate and white carbon black is good, and the product purity is high; the refresh cycle of mother liquor is prolonged, the replacement amount of the mother liquor is reduced, waste liquor emissionis reduced, and the production is more environmentally friendly and more convenient.

The invention provides a method for comprehensively utilizing hydrazine hydrate by-product sodium carbonate decahydrate through a urea method. The method comprises the following steps: pulping sodium carbonate decahydrate subjected to freezing crystallization, heating up, forming a sodium carbonate solution with a certain concentration, filtering, removing the impurities, introducing CO2 and carbonizing in a carbonizing tower so as to generate sodium bicarbonate, centrifuging and separating the sodium bicarbonate generated in the reaction, and drying to obtain baking soda; taking a small amount of finished baking soda, adding the baking soda into a hydrazine hydrate solution prepared by the urea method, controlling the PH value, and neutralizing the excessive caustic soda solution in the crude hydrazine solution. The method has the beneficial effects that the sodium carbonate decahydrate which serves as the waste for performing low-price treatment is comprehensively utilized, and the economic value of the by-product is greatly improved; and moreover, more sodium carbonate decahydrate can be obtained in the subsequent freezing sodium carbonate removal link, the concentration of the hydrazine hydrate in the crude hydrazine is improved, and the consumption of acid in the biurea condensation reaction process is reduced.

The invention discloses a preparation technology of lithium carbonate. The preparation technology comprises the following steps: S1, a process of impurity removal and concentration: carrying out impurity removal and concentration on salt lake brine to obtain lithium-containing concentrated liquor; S2, a process of carbonization lithium-settling: adding sodium carbonate decahydrate crystals which is a by-product produced in a process of preparing biurea by means of urea treatment into the lithium-containing concentrated liquor obtained in the S1 so as to form reaction liquid, wherein the molar ratio of sodium carbonate to lithium in the reaction liquid is equal to (1.2-1.6): 2 in an initial state, and carrying out a reaction to generate lithium carbonate precipitate; S3, a process of aftertreatment: separating out the lithium carbonate precipitate generated in the step S2, washing, and drying to obtain the lithium carbonate product. The preparation method utilizes the sodium carbonate decahydrate crystals which is the by-product produced in a process of preparing the biurea by means of urea treatment, thus realizing the effects of recycling the material and reducing the long-distance transport cost of the material; furthermore, the preparation method also lowers the preparation cost of the lithium carbonate, thus having higher economic benefit. After the preparation technology is adopted, the high-quality lithium carbonate product also can be obtained and is beneficial to later use.

A method of producing crystals of crystallizable mineral salt comprises introducing an effluent comprising a dissolved crystallizable mineral salt at a temperature higher than the mineral salt crystallization temperature to a crystallization pond area to provide a pond solution; cooling the pond solution to provide cooling crystallization promoting conditions effective to form a crystalline mineral salt deposit; stopping the flow of the effluent; draining remaining spent liquor to a liquor pond area; and recovering the deposit. Cooling the pond solution may comprise exposure to cool ambient temperatures which are lower than the crystallization temperature. Preferably, the mineral salt includes or is sodium carbonate decahydrate; the pond solution comprises less than 10% NaCl; and/or the decahydrate deposit is sent or recycled to a soda ash plant. The deposit thus formed by cooling crystallization has a higher purity, lower hardness, and/or lower density than a deposit formed by evaporative crystallization.

The invention relates to a method for recycling fluorosilicone in high-salt ammonia-nitrogen wastewater and producing sodium fluoride with coproduction of white carbon black. The method is characterized in that sodium fluoride is produced by taking sodium fluorosilicate and sodium carbonate decahydrate or sodium carbonate as raw materials; sodium carbonate decahydrate is produced by crystallizingsodium carbonate component in high-salt ammonia-nitrogen wastewater; a reaction by-product which is white carbon black is used as a raw material for preparing sodium fluorosilicate; sodium fluorosilicate is generated by taking fluosilicic acid and sodium chloride or sodium sulfate as raw materials through double decomposition reaction; sodium chloride or sodium sulfate is produced by the high-saltammonia-nitrogen wastewater; fluosilicic acid is prepared by reacting acidic fluorine-containing wastewater with the white carbon black; or fluosilicic acid which is a by-product in the phosphate fertilizer industry is directly used. The method has the advantages that fluorosilicone in the high-salt ammonia-nitrogen wastewater is recycled and is used for producing sodium fluoride with coproduction of white carbon black, the contents of ammonia-nitrogen and salt in the wastewater can be greatly reduced, the treatment cost of the wastewater is reduced, the wastewater is reused, the waste is changed into wealth, and the economic benefit is increased.

The invention relates to a method of preparing azodiisobutyronitrile. The method comprises the following steps: a, carrying out a reaction on acetone cyanohydrin and hydrazine hydrate to generate diisobutyronitrile hydrazine; and b, introducing chlorine to diisobutyronitrile hydrazine to react to generate azodiisobutyronitrile, wherein hydrazine hydrate used in the step a is prepared by a urea method. The hydrazine hydrate is specifically prepared by the following steps: (1) introducing chlorine to a caustic soda solution to generate sodium hypochlorite; (2) adding solid urea to prepare a urea saturated solution and carrying out a reaction with sodium hypochlorite to obtain a coarse solution containing hydrazine hydrate; and (3) freezing and crystallizing the coarse solution containing hydrazine hydrate to separate sodium carbonate decahydrate so as to obtain a refined solution of hydrazine hydrate, adding a neutralizer to neutralize the pH to 2-3, removing sodium hydroxide and sodium carbonate in the solution, and then adding the refined solution of hydrazine hydrate to reversely neutralize to PH to 10-10.5. According to the method provided by the invention, the purification process of the hydrazine hydrate solution is canceled and the production procedure is simplified, so that the production cost is greatly lowered.

The invention discloses a chemical ice bag which comprises sodium carbonate decahydrate, ammonium nitrate and water. The invention has the advantages of reasonable formula, good use effect and low production cost.

The invention relates to a cheek cold compressing face mask. The size of the cheek cold compressing face mask is a little greater than that of an ordinary mask; the cheek cold compressing face mask can better wrap parts easily generating edema on the face, but the mouth and nose parts are exposed. In the use process, substances in a disposable ice bag are poured into the face mask; the ice bag is broken through pinching when being used; ammonium salt is dissolved in water for absorbing heat, and ammonium nitrate takes a reaction with sodium carbonate decahydrate for absorbing heat, so that the temperature of the face mask is lowered; the cold compressing effect is achieved. The face mask is used in an ear hanging mode, and does not need to be fixed on the face by hand; some other things can be made during cold compressing, so that the time is saved.

The invention discloses a treatment method of carbonate-containing wastewater. The carbonate-containing wastewater passes through a regulating reservoir, a multi-medium filter, an ultrafiltration system, a reverse osmosis system, a primary resin softening system, a concentrated water reverse osmosis system, an advanced oxidation system, a tubular microfiltration system, a secondary resin softening system, a high-pressure reverse osmosis system, a sludge filter pressing system, an evaporation freezing crystallization system, an evaporation crystallization system, a wastewater treatment system, a recycling water tank and the like for process treatment to obtain sodium carbonate decahydrate product salt and by-products sodium sulfate and sodium chloride product salt. The treatment method has the advantages of strong anti-pollution capability, high concentration multiple, high recovery rate, high crystallized salt quality, high automation degree, low investment and low operation cost.

Pure mung bean noodles are prepared by taking mung bean powder obtained by grinding mung beans as the raw material and eggs, salt, sodium carbonate decahydrate and water as the auxiliary materials. 5-10 parts of eggs, 0.1-1.5 parts of salt, 0.1-1.5 parts of sodium carbonate decahydrate and 2-10 parts water by weight are added to every 100 parts of mung beans by weight. The mung bean noodles are prepared by the following steps: first adding water accounting for 5-10% of the material amount into the mung bean residues, turning and stirring the mixture at room temperature and sealing the mixturefor 8-12h, carrying out peeing after purification and then using a stone mill to mill the mixture into 80-120-mesh fine powder for standby use; and mixing the eggs, salt and sodium carbonate decahydrate with mung bean powder according to the above proportion, adding water to knead dough and rolling the dough to noodles by a plodder with revolution of 20-50r/min. The noodles feature reasonable proportion of primary and auxiliary materials, are easy to shape up, maintain the nutritions and taste of the mung beans, have good edible ductility, unique, smooth and refreshing taste and have the effects of clearing away heat and toxic materials, moistening skins, invigorating primordial energy, coordinating five internal organs and tranquilizing the mind and caring skins.