80 results about "Alkali salt" patented technology

The invention provides an alkali-salt composite excited low-carbon hydraulic cementing material based on an element compatibility method as well as a preparation method and application thereof, and relates to the technical field of building materials. Silica-aluminum solid waste (mainly providing SiO2 and Al2O3), a sulfate solid waste exciting agent (mainly providing alkali metal oxide and / or alkaline earth metal oxide and SO3) and an alkaline solid waste exciting agent (mainly providing an alkalinity environment required by a hydration reaction) are used as main materials to generate a certain content of hydration product ettringite crystals and C (N)-A-S-H gel, and a compatibility method is adopted for design. The relative contents of Ca, Si, Al and S in a cementing system are adjusted while the alkaline solid waste excitant and the sulfate solid waste excitant are compounded and cooperated to excite the silicon-aluminum solid waste, so that the contents of ettringite crystals and hydrated calcium silicate gel in the whole hydration system are controlled, and the early strength and the later strength of the alkali-salt compounded and excited low-carbon hydraulic cementing material are improved.

This invention provides a method and application for the comprehensive utilization of chlor-alkali salt mud solid waste to prepare a composite de-icing agent, belonging to the field of comprehensive utilization of solid waste resources and composite material synthesis technology. The invention first prepares a slurry by mixing chlor-alkali salt mud with water. Then, under the action of an acidification aid and an ionic liquid, organic and inorganic acids are added in a single step, followed by precipitation of the composite de-icing agent in an alcohol precipitation solution. The method of this invention achieves a salt mud utilization rate of 86.55-88.85% and an effective component extraction rate of 96.70-99.27%, especially for Ca... 2+ Na + K + Mg 2+ Al 3+ The extraction rates reached 95-99.99%, 99.9%, 99.9%, 85.5-95.0%, and 80.5-90.0%, respectively, and also improved the extraction efficiency of Ca in the solution. 2+ Na + K + Mg 2+ Al 3+ The precipitation rates reached 95.5-99.5%, 75.5-80.5%, 72.5-75.5%, 95.5-99.5%, and 71.5-75.5%, respectively, and the product yield reached 90.80-95.08%. It has broad prospects for snow melting and ice removal in low-temperature environments of -15℃ to -20℃.

The present invention relates to the use of a lubricant composition comprising at least one alkali salt or alkaline earth salt of hydroxybenzoic acid, optionally substituted with at least one hydrocarbon group, referred to as hydroxybenzoate salt, in an ammonia combustion engine. The invention also relates to the use of said hydroxybenzoate salt as a corrosion retardant in an ammonia combustion engine. The invention further relates to a method for lubricating an ammonia combustion engine, comprising a step of bringing at least one mechanical part of said engine into contact with a lubricant composition comprising at least said hydroxybenzoate salt.

The present application relates to the technical field of chemical medicine preparation, and particularly relates to a preparation method of tetrabromophenol tetrahalosulfonophthalein, which is prepared from 3,4,5,6-tetrahalophenol sulfonophthalein as raw material, organic carboxylic acid in aqueous solution, liquid bromine, oxidation by hydrogen peroxide to obtain tetrabromophenol tetrahalosulfonophthalein crude product, then salification with alkali salt in an aprotic solvent to obtain tetrabromophenol tetrahalosulfonophthalein salt; and then acid conversion with organic carboxylic acid in aqueous solution, recrystallization to obtain tetrabromophenol tetrahalosulfonophthalein pure product; the present application provides a preparation method of tetrabromophenol tetrahalosulfonophthalein, which is low in cost, high in yield and purity, simple in method, mild in condition, high in yield and purity, and beneficial to mass production.

The invention discloses an electrodeionization device for preparing ultrapure water, and relates to the technical field of water treatment.The electrodeionization device comprises a shell, an electrodeionization cavity, a cathode chamber, an anode chamber and a cation replacement module, a deionization module is arranged between the cation replacement module and the cathode chamber, and a concentrated water chamber is arranged between the deionization module and the cation replacement module; the deionization module comprises a first cation exchange membrane, a decation fresh water chamber, a first bipolar membrane, a deanion fresh water chamber and a first anion exchange membrane which are arranged in sequence, and the cation replacement module comprises a second cation exchange membrane, a cation replacement chamber, a third cation exchange membrane, an ion supply chamber and a second anion exchange membrane which are arranged in sequence; to-be-treated water sequentially flows through the cation replacement chamber, the deanion fresh water chamber and the decation fresh water chamber, and a strong acid and strong alkali salt solution is contained in the ion supply chamber. The device has the advantages of efficiently removing soluble acid gas, reducing the scaling risk of the concentrated water chamber and improving the resistivity of produced water.

The invention belongs to the technical field of chemical synthesis and specifically discloses a preparation method of a diphenylamine-type adamantane substituent compound. The method comprises the following steps: adding adamantane alcohol and acetanilide to a solvent for reaction to obtain adamantane acetanilide; adding adamantane acetanilide and NBS to the solvent for reaction to obtain bromoadamantanacetanilide; adding bromoadamantanacetanilide, phenylboric acid, a catalyst and an alkali salt to the solvent for reaction to obtain phenyladamantanacetanilide; and adding phenyladamantanacetanilide and hydrochloric acid to the solvent for reaction to obtain adamantane diphenylamine. The method has readily available raw materials and simple operation, has achieved kilogram-level production, and has high product purity, with a liquid phase purity of over 99.9%.

A process for upcycling a polymeric waste material containing a polyarylethersulfone (PAES polymer) having less than 20 mol% reactive end groups, comprising depolymerizing the PAES polymer in the presence of a phenolic nucleophile and an alkali salt-forming carbonate agent in a polar aprotic solvent to obtain a PAES reactive macromer of lower molecular weight which is recovered. A composite comprising a resin matrix, reinforcing fibers and the PAES reactive macromer. An article made from a self-crosslinking PAES reactive macromer. Such a PAES reactive macromer contains more than 60 mol% of reactive end group(s) Ref, at most 20 mol% halide end group(s) X, and at most 20 mol% of unreactive end group(s) Ne, based on the total amount of moles of end groups. Preferably, Ref contains at least one group selected from –OH, -NH2, -COOH, –C≡CH, –C≡C–Ar, and / or an OH group connected to –Ara--W-Ara-, wherein Ar is an aryl group, Ara is an allyl-substituted aryl group, and W is a single bond, –C(CH3)2– and / or –SO2–. Preferably, Ne is an alkoxy group, such as methoxy, and X is Cl.

The application provides a method for preparing calcium-magnesium acetate environment-friendly snow-melting corrosion inhibitor from chlor-alkali salt mud solid waste, and belongs to the technical field of comprehensive utilization of solid waste and organic material synthesis. Firstly, the chlor-alkali salt mud is prepared into slurry with water, then under the action of acidification aid and ionic liquid, the acetate is added at one time, and then the calcium-magnesium acetate environment-friendly snow-melting corrosion inhibitor is precipitated in the alcohol precipitation solution. The method can achieve 84.13-87.26% of the utilization rate of the salt mud, 95-99.99% and 85-92% of the extraction rates of Ca 2+ and Mg 2+ in the salt mud respectively, basically realizing the full recovery of high-value components in the salt mud. The precipitation rates of Ca 2+ and Mg 2+ in the solution are 96.4-99.9% and 96.6-99.9% respectively, basically realizing the full precipitation of Ca 2+ and Mg 2+ , the product yield reaches 96.5-99.9%, the whiteness of the product reaches more than 98.0, no waste liquid is generated in the whole process, and the recycling of the salt mud solid waste is realized.

Composition comprising a thiopyridinone compound and an aminosulfonic compound. The present invention relates to a composition, in particular a cosmetic composition, comprising at least one compound of formula (I), at least one aminosulfonic compound of formula (II), and strictly less than 0.2% by weight of an alkali salt of thiosulfuric acid and / or its solvates such as hydrates, or totally free of an alkali salt of thiosulfuric acid and / or its solvates such as hydrates. Figure for the abstract: none

The invention provides a method for preparing a calcium magnesium acetate environment-friendly snow melting corrosion inhibitor by comprehensive utilization of chlor-alkali salt mud solid waste, and belongs to the technical field of solid waste resource comprehensive utilization and organic material synthesis. The method comprises the following steps: firstly, preparing chlor-alkali salt mud and water into slurry, then adding acetic acid at one time under the action of an acidification auxiliary agent and an ionic liquid, and then realizing the precipitation of the calcium magnesium acetate environment-friendly snow melting corrosion inhibitor in an alcohol precipitation solution. According to the method, the utilization rate of the salty mud reaches 84.13-87.26%, the extraction rates of Ca < 2 + > and Mg < 2 + > in the salty mud respectively reach 95-99.99% and 85-92%, total recovery of high-value components in the salty mud is basically achieved, the precipitation rates of Ca < 2 + > and Mg < 2 + > in the solution respectively reach 96.4-99.9% and 96.6-99.9%, total precipitation of Ca < 2 + > and Mg < 2 + > is basically achieved, the product yield reaches 96.5-99.9%, the product whiteness reaches 98.0 or above, no waste liquid is generated in the whole process, and the method is suitable for industrial production. The cyclic utilization of the salty mud solid waste is realized.

The present invention relates to a polymerizable solution for impregnating wood, a method for impregnating wood with said solution and impregnated wood impregnated with said solution. The polymerizable solution comprises: - furfuryl alcohol in the range from 25 to 75 weight% based on the total weight of the solution, - carboxylic acid in the range from 0.01 to 0.15 mol / kg based on the total weight of the solution, - maleic anhydride in the range from 0.25 to 4 weight% based on the total weight of the solution, - condensate from a previous curing process of wood in the range from 24 to 74 weight% based on the total weight of the solution, and - an amount of water-soluble alkali salt to obtain a pH in the range from 3 to 5 at the time point when the solution is made.

Disclosed are a crystalline form of a high-stability nor-ursodeoxycholic berberine salt and a preparation method therefor, while relate to the field of pharmaceutical chemistry. The crystalline form has the following structural formula. In X-ray powder diffraction of the crystalline form, a 2θ diffraction angle has characteristic peaks at 3.54+ / -0.2 degrees, 7.13+ / -0.2 degrees, 13.14+ / -0.2 degrees, 15.95+ / -0.2 degrees, 16.40+ / -0.2 degrees, 18.64+ / -0.2 degrees, 24.90+ / -0.2 degrees, 25.76+ / -0.2 degrees and 26.30+ / -0.2 degrees. Compared with other crystalline forms of the nor-ursodeoxycholic berberine salt, the crystalline form has more excellent stability, and has a good application prospect in the preparation of high-quality solid chemical drugs.

The utility model relates to the technical field of electronic wires, in particular to an anti-corrosion electronic wire which comprises a battery core conductor, a spiral groove is arranged on the outer side surface of the battery core conductor, conductive gel containing benzotriazole is filled in the spiral groove, a conductive layer is sleeved on the outer side of the battery core conductor, a chemical passivation layer is arranged on the outer side of the conductive layer, and an anti-corrosion layer is arranged on the outer side of the chemical passivation layer. The outer side of the chemical passivation layer is sleeved with a physical blocking layer, the outer side of the physical blocking layer is provided with a fireproof mica layer, the outer side of the fireproof mica layer is sleeved with a shielding layer, the outer side of the shielding layer is sleeved with an armor layer, and the outer side of the armor layer is sleeved with an anti-corrosion sheath. Through the synergistic effect of the chemical passivation layer and the four-layer composite anti-corrosion sheath (the W61-3 organic silicon coating, the graphene epoxy coating, the nano modified layer and the PTFE glass fiber composite layer), a chemical and physical dual protection system is formed, the cable can resist complex corrosion environments such as acid, alkali, salt and humid and hot atmosphere, and the protection life is prolonged by more than three times.

The application provides a method for modifying DPP pigment with a tertiary butyl alcohol alkali salt, which uses DPP pigment as raw material, and also uses a tertiary butyl alcohol alkali salt, carbon dioxide and sulfonyl chloride as raw material; and uses an aprotic solvent as solvent; the method first synthesizes a salt containing a tert-butyloxycarbonyl group, and then uses the tert-butyloxycarbonyl group in the salt to modify an imino group in a DPP pigment molecule to obtain a modified DPP pigment. The application uses DPP pigment, a tertiary butyl alcohol alkali salt, carbon dioxide and sulfonyl chloride as raw material, uses an aprotic solvent as solvent, uses a unique molecular structure design, synthesizes a tert-butyloxycarbonyl group to directly modify an imino group on a DPP pigment molecule to achieve the purpose of chemical modification; the side reaction is low, and the generated by-product can be removed by water washing, and will not affect the performance of the parent pigment.

The invention discloses a method for selectively preparing an indole compound or a carbazole compound by alkali salt regulation and manganese catalysis, which comprises the following steps of: selectively synthesizing the indole compound or the carbazole compound by taking 2-aryl indole or substituted 2-aryl indole and alpha-chloro aryl ethyl ketone or substituted alpha-chloro aryl ethyl ketone as initial raw materials; conditions are mild, selectivity, yield and safety are high, and industrial production is facilitated; according to the invention, 2-aryl indole or substituted 2-aryl indole and alpha-chloro-aryl ethyl ketone or substituted alpha-chloro-aryl ethyl ketone are used as initial raw materials for the first time, and alkali salt is regulated to regulate the reaction so as to selectively prepare indole compounds or carbazole compounds.

In a method (1) of recovering an alkali metal from a material (2) including the alkali metal as a free alkali element, the material (2) is contacted with an aqueous solution (3) such as to convert the free alkali element into an alkali salt dissolved in the aqueous solution (3). The aqueous solution (3) with the alkali salt dissolved therein is separated from solid remainders of the material (2); and the separated aqueous solution (3) is hydrometallurgically processed to recover the alkali metal. In order to reduce an emission of hydrogen from the aqueous solution (3) contacting the material (2), a metal salt of a more noble metal that is higher in the galvanic series than the alkali metal is added to the aqueous solution (3).

Aqueous gel, its use in cosmetics and process to reduce the sticky effect felt during its application. Aqueous gel comprising from 0.5% wt to 5.0% wt of a crosslinked anionic polyelectrolyte (PA) comprising from 5.0% mol to 95.0% mol of monomeric units from 2-methyl-2-((1-oxo-2-propenyl)amino)-1-propanesulfonic acid partially or totally salified as an alkali salt or ammonium salt, from 4.9% mol to 90.0% mol of monomeric units of N,N-dialkylacrylamide and from 0.1% mol to 5.0% mol of monomeric units from a monomer of formula CH2=C(CH3)-C(=O)-O-(CH2-CH2-O-)n-R5; from 0.5% mass to 9.5% mass, either of an alkanol of formula R1-OH, or of a mixture of alkanols of formula R1-OH; or of a composition (C) of alkyl polyglycosides represented by the formulas R1-O-(G)xH, in which G represents either the remainder of glucose or the remainder of xylose and x represents a decimal number between 1.05 and 2.05;either a mixture (M) of said alkanol of formula R1-OH or of said mixture of alkanols of formula R1-OH and of said composition (C); from 0.0% mass to 3.0% mass one or more cosmetic active ingredients and the quantity of water necessary to make up to 100% mass in which the mass ratio (RM) having as numerator the mass of the alkanol(s) of formula R1-OH, or the mass of said composition (C) or the mass of said mixture (M) and as denominator, the mass of said cross-linked anionic polyelectrolyte (PA), is greater than or equal to 1 and less than or equal to 10; cosmetic skin care process using said aqueous gel; use, either of said alkanol of formula R1-OH, or of a mixture of alkanols of formula R1-OH, or of said composition (C) or of said mixture (M), with a view to reducing or eliminating the sticky effect felt when applying to the skin an aqueous gel comprising said anionic polyelectrolyte (PA);process for reducing or eliminating the sticky feeling experienced when applying an aqueous gel comprising said anionic polyelectrolyte (PA) to the skin by modifying its composition before application to the skin, by adding either the alkanol(s) of formula R1-OH, or said composition (C), or said mixture (M).;

The application provides a preparation method of a medical intermediate 4-bromo-6-chloronicotinic acid methyl ester. The method takes 4,6-dichloronicotinic acid methyl ester as a starting material, reacts with an alkali salt to obtain 6-chloro-4-hydroxynicotinic acid methyl ester; then the 6-chloro-4-hydroxynicotinic acid methyl ester reacts with a bromination reagent under the action of an acid binding agent to obtain the target product 4-bromo-6-chloronicotinic acid methyl ester. The preparation method has short steps, the raw material is easy to obtain and low in price, the reaction conditions are mild, easy to purify, and simple to operate; meanwhile, the product has high yield, high purity, low production cost, is convenient for industrialized production, has a good application prospect, and plays a positive role in the research and development of downstream products of 4-bromo-6-chloronicotinic acid methyl ester.

The utility model discloses a chlor-alkali salt mud collecting device which comprises a tank body, sliding rods are arranged on the two sides of the tank body in a sliding mode in the length direction of the tank body, a supporting plate is fixedly connected to the tops of the sliding rods on the two sides, and a movable plate is vertically arranged at the bottom of the supporting plate in a lifting mode. The utility model relates to the technical field of salty mud collection. According to the chlor-alkali salty mud collecting device, firstly, a movable plate descends to drive a scraping plate to descend to the bottom of the interior of a tank body, then a sliding rod slides to drive the scraping plate to slide in the length direction of the tank body, and when the scraping plate slides to the front side of the interior of the tank body, salty mud in the tank body is dug upwards to be in a horizontal state by rotating the scraping plate; then the scraper blade is driven by the ascending movable plate to ascend to the opening of the tank body, the salty mud on the scraper blade is scraped into the collecting frame to be collected by sliding the cleaning plate, the waste of resources is reduced by collecting the salty mud, the environment is protected, and the harm of the salty mud to equipment and workers is avoided.

The invention provides a method for preparing a snow-melting agent by comprehensive utilization of chlor-alkali salt mud solid waste, and belongs to the technical field of solid waste resource comprehensive utilization and inorganic material synthesis. The method comprises the following steps: firstly, preparing chlor-alkali salt mud and water into slurry, then adding concentrated hydrochloric acid at one time under the action of a dispersing agent and an acidification auxiliary agent, then adjusting and concentrating through a calcium-containing solid alkaline substance, adding chitosan to remove impurities, and finally realizing the precipitation of the snow-melting agent in an alcohol precipitation solution of ethanol and ethyl acetate. According to the method, the utilization rate of the salty mud reaches 86.37%-88.61%, the extraction rate of effective components reaches 96.5%-99.0%, the precipitation rates of Ca < 2 + > and Mg < 2 + > in the solution respectively reach 95% or above and 96.3% or above, the yield of the snow-melting agent reaches 95.5%-99.99%, the whiteness of the snow-melting agent reaches 98.0% or above, no waste liquid is generated in the whole process, cyclic utilization of salty mud solid waste is achieved, and remarkable environmental benefits and economic benefits are achieved.

The application provides a Cd-Ni3S2 / NF composite material and a preparation method and application thereof. By adopting the preparation method provided in the application, by regulating the molar quantity of a cadmium source, a nickel salt, an alkali salt, ammonium fluoride and a sulfur source within the range of the application, and the reaction temperature and time in steps (2)-(3), the Cd-Ni3S2 / NF composite material obtained has HER and OER dual-function electrocatalytic activity.

The invention belongs to the technical field of ocean engineering structure durability research, and discloses a test method for simulating the bonding durability of an FRP (Fiber Reinforce Plastic) rib in an actual service environment of an ocean concrete structure. Comprising the steps of carrying an FRP rib with a crack channel and a concrete bonding test piece, accelerating a corrosion device and calculating the time of leading a member concrete crack to the FRP rib. A loading support is installed at the loading end of the bonding test piece, and a force application nut is rotated to apply a load to a required value. A loading test piece is placed on a water tank supporting frame filled with seawater, after the test piece is soaked for theoretical time, a port of a U-shaped pipe is opened to enable seawater to flow through the U-shaped pipe, seawater is simulated to seep to an FRP rib bonding interface through a concrete crack, and the whole process that the corrosion mode of the FRP rib is evolved from an alkaline environment to an alkali-salt coupling environment is achieved. The method effectively solves the problem of unreliable test conclusion caused by large difference between the corrosion state of the bonding interface of the FRP rib and the corrosion environment in a maritime work structure actually serving in the ocean in a traditional accelerated corrosion test.

Process for treating keratinous materials employing at least one polysaccharide compound with acetoacetate functional groups. The present invention relates to a process for treating keratinous materials, comprising applying to said keratinous materials, in one or more successive steps, at least i) one or more compounds of formula (I) as well as their optical and geometric isomers, their acid or base salts, and / or solvates, such as hydrates, or a composition containing them: (I) formula (I) in which X, R1, R2, Ra, Rb, and n are as defined in the description, optionally ii) at least one crosslinking agent, iii) optionally water. Figure for the abstract: None

The application provides a kind of alkaline deruster and its preparation method, belong to metal surface treatment technical field.The alkaline deruster includes: base mother liquor, alkali salt, surfactant and water;The base mother liquor includes organic acid, chloride and fluoride.The alkaline deruster provided in the application does not contain volatile inorganic acid such as phosphate acid, does not contain heavy metal or harmful substance, is friendly to environment, the alkaline deruster can simplify three processes of oil removal, water washing and rust removal into one process, greatly improves production efficiency;The alkalinity of the alkaline deruster is alkaline, and the position of weld seam, clamping seam and pipe, etc. after pickling of workpiece is prone to residual reagent, and the position will not appear re-rust phenomenon caused by strong acidic derusting, corrosion is low, and has no irritating smell.

The invention discloses application of a boron and alkali metal salt composite synergistic system in ring-opening polymerization and copolymerization, and belongs to the field of polymer synthesis. The invention provides a dual-core or multi-core boron Lewis acid-base pair catalytic system, and particularly relates to a QC-B1 / potassium tert-butoxide / 18-C-6, CAT-B2 / potassium tert-butoxide / P5Cl and POSS-B8 / potassium tert-butoxide / P5Cl acid-base composite system, which can efficiently and controllably realize the copolymerization of epoxide and CO2 and the homopolymerization of epoxide. And carrying out copolymerization on the epoxide and CO2 to obtain the low-molecular-weight and end-functionalized polycarbonate. According to the invention, the synthesis of polycarbonate is realized by adopting a potassium alkoxide / ether or potassium alkoxide / phosphazene salt composite system and binuclear or multi-nuclear organic boron, and the problems of complex synthesis and high price of onium salt and phosphazene base halogen and phosphazene in the prior art are solved.

An environmentally-clean fire inhibiting liquid biochemical composition for application on combustible surfaces to inhibit fire ignition and flame spread in the presence of fire. The environmentally-clean fire inhibiting liquid biochemical composition including a dispersing agent realized in the form of a quantity of water, for dispersing metal ions dissolved in water; a fire inhibiting agent in the form of at least one alkali metal salt of a nonpolymeric saturated carboxylic acid, for providing metal ions dispersed in the water when the alkali metal salt of a nonpolymeric saturated carboxylic acid is dissolved in the quantity of water; and a coalescing agent in the form of an organic compound containing three carboxylic acid groups, or salt / ester derivatives thereof, specifically triethyl citrate (TEC), an ester of citric acid, for dispersing and coalescing the metal ions when the fire inhibiting liquid composition is applied to combustible surfaces to be protected against fire, while water molecules in the water evaporate to the environment during drying, and the metal ions cooperate to form thin alkali metal salt crystalline coatings on the combustible surfaces. The alkali metal salt of nonpolymeric saturated carboxylic acid may be selected from the group consisting of: alkali metal salts of citric acid; alkali metal salts of oxalic acid; alkali metal salts of gluconic acid; and alkali metal salts of tartaric acid. The alkali metal salt of nonpolymeric saturated carboxylic acid may be selected from the group consisting of the alkali salt of lithium, the alkali salt of sodium, the alkali salt of potassium, the alkali salt of cesium and the alkali salt of rubidium. Preferably, the alkali metal salt of nonpolymeric saturated carboxylic acid is an alkali salt of potassium, namely tripotassium citrate (TPC).

The present application belongs to the technical field of environmental protection and solid waste recycling, and particularly relates to a method for passivating, completely removing alkali and retaining valuable metal components of red mud. The present application limits the precise alkali removal acid amount by an acid amount formula, creates a weak acid reaction environment, and limits only the alkali substances contained in the red mud to participate in the neutralization reaction by controlling the passivation agent amount, liquid-solid ratio, stirring time and temperature and other parameters, to generate alkali salt dissolved in water, and then separates and discharges the alkali salt by filtration to prepare the alkali-removed red mud filter cake. During the whole reaction process, the metal oxide components such as Fe2O3 and TiO2 are basically completely retained in the alkali-removed red mud filter cake due to the weak acid environment and the passivation and oxidation of the passivation agent. The alkali-removed red mud obtained by the present application contains zero alkali and increased iron content, and can be directly used as fine iron powder or catalyst, adsorbent, building material, roadbed material and the like.

The invention relates to a preparation method of lithium bis (fluorosulfonyl) imide liquid salt, which comprises the following steps: step 1, reacting hexamethyldisilazane, fluorosulfonic acid and organic alkali serving as raw materials in the presence of a first solvent and in an inert gas atmosphere, and removing a reaction solvent by reduced pressure distillation after the reaction is finished, washing the concentrated solution with water, and drying to obtain organic alkali salt of bis (fluorosulfonyl) imide; and 2, reacting the organic alkali salt of the imidodisulfuryl fluoride with an alkaline lithium source in the presence of a second solvent, and after the reaction is finished, filtering, crystallizing and drying to obtain the high-purity lithium imidodisulfuryl fluoride, and 3, adding the obtained lithium bis (fluorosulfonyl) imide into DMC (dimethyl carbonate), and dissolving to prepare a DMC solution with the concentration of about 30% so as to obtain the lithium bis (fluorosulfonyl) imide liquid salt. The method overcomes the problems of high production cost, complex process, low yield and purity and the like caused by production of a large amount of water, acid gas and organic matters in the preparation process of the lithium bis (fluorosulfonyl) imide liquid salt and many purification steps in the prior art.

The present application belongs to the technical field of hydrogen production method, and particularly relates to a supercritical water gasification hydrogen production system and method suitable for high-concentration lignocellulose biomass, which realizes preparation and pumping of high-concentration cellulose biomass slurry, does not cause a substantial breakage of chemical bonds of material molecular structure in the slurry preparation process, only generates a small amount of gas, and has excellent slurry uniformity, stability and flowability; by using the physicochemical properties of supercritical water, a two-step gasification method is adopted, a primary reactor is based on the supercritical water liquefaction principle, realizes alkali salt recovery and macromolecular depolymerization, and a causticizing device is used to increase the reusability of alkali salt, improve the economy of the pulping process, and realize low-cost slurry preparation; based on the simplification of material molecular structure in the primary reactor, the occurrence of carbon deposition and reactor corrosion in a secondary reactor is substantially reduced, high-efficiency gasification of lignocellulose biomass is realized, and the efficiency of the system gasification efficiency is ensured.