28 results about "Anhydrous" patented technology

The invention relates to the technical field of chemical synthesis, and discloses a preparation method of anhydrous N, N-dimethyl amino sulfuryl fluoride, which comprises the following steps: (1) introducing sulfuryl fluoride gas into a dimethylamine organic solution to carry out nucleophilic substitution reaction, and then adding triethylamine to obtain a mixed solution containing N, N-dimethyl amino sulfuryl fluoride; and (2) sequentially carrying out normal-pressure rectification and reduced-pressure rectification on the mixed solution containing the N, N-dimethyl amino sulfonyl fluoride to obtain the N, N-dimethyl amino sulfonyl fluoride. According to the method, water is not introduced in the whole process, the risk of water residue is avoided, and the prepared product is high in yield and purity.

The invention relates to a preparation technology of a multifunctional plastic clothes hanger through cooperation of degradable color master batches and nitrogen filling injection molding, and belongs to the technical field of plastic products. Adding the polylactic acid, the styrene-acrylonitrile copolymer, the modified stone powder, the degradable color master batch and the compound additive into a horizontal helical ribbon mixer, stirring and drying to obtain a mixture; the dried mixture is added into an injection molding machine to be melted and plasticized, a screw pushes melt to be injected into a mold, high-pressure nitrogen is injected into the melt, and the melt is pushed to completely fill a cavity; the plastic clothes hanger is obtained through pressure maintaining, cooling and demolding; the compound additive is prepared from allyl alcohol polyoxyethylene ether, 2-octenyl succinic anhydride, 14-mercaptotetradecanoic acid, anhydrous tetrahydrofuran, 2-hydroxy-4 '-(2-hydroxyethoxy)-2-methyl propiophenone and triethylamine. The preparation method comprises the following steps: preparing the compound additive; the degradable material is adopted, the biodegradation rate is high, the mechanical property is stable, the coloring effect is good, fading is not prone to occurring, and the service life is long.

The invention relates to the technical field of energetic materials, in particular to nickel fluoride catalyzed ammonium perchlorate / aluminum composite fuel and a preparation method and application thereof. The ammonium perchlorate / aluminum composite fuel consists of the following components in percentage by mass: 50-70% of ammonium perchlorate, 0-10% of nickel fluoride and the balance of aluminum powder. Due to the addition of NiF2, high and low decomposition peaks of AP are combined into a violent exothermic peak, and the temperature of the high-temperature decomposition peak is reduced by about 30 DEG C, which means that the burning rate of the propellant can be greatly improved; the heat effect of the fluorination reaction (55.98 kJ. G <-1 >) of aluminum is far higher than the heat effect of the oxidation reaction (31.05 kJ. G <-1 >) of aluminum, so that the explosion heat is improved by about 10% while the reaction path is optimized. Besides, the anhydrous NiF2 used in the formula is stable in physical and chemical properties and does not absorb moisture and deliquesce, the problem of long-term storage of common fluorides such as CuF2 and FeF3 is solved, and the product reliability is extremely high.

This invention relates to the field of bionanomaterials technology, and particularly to mitochondrial-targeting nanomaterials capable of releasing HNO, their preparation methods, and applications. The preparation method of the mitochondrial-targeting nanomaterials capable of releasing HNO includes the following steps: synthesis of a silanized HNO donor: hydroxylamine hydrochloride is dissolved in a mixed solvent of anhydrous tetrahydrofuran and anhydrous pyridine, and a dichloromethane solution of 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane is added. The mixture is stirred at room temperature, and after post-treatment, a silanized HNO donor is obtained; synthesis of aminated carbon dots: chitosan, ethylenediamine, and mercaptosuccinic acid are dispersed in deionized water, and concentrated hydrochloric acid is added and stirred until dissolved. This preparation method can prepare mitochondrial-targeting nanomaterials capable of releasing HNO, achieving precise delivery, controlled release, and visual tracking of HNO to cardiac mitochondria, solving the technical problems of traditional HNO donors' inability to achieve stable loading on carriers and lack of mitochondrial targeting ability.

The invention belongs to the field of novel functional polymer materials, and discloses a preparation method of a selenium-containing polymer material capable of fixing metal ions, and the preparation method comprises the following steps: S1, adding PTMEG into a round-bottom reaction flask filled with inert gas, and placing the round-bottom reaction flask in an oil bath pan for melting; s2, MDI, dimethylglyoxime, DSe and anhydrous N, N-dimethylacetamide are sequentially added and fully mixed; s3, stannous octoate and CuCl2 are added at the same time; s4, keeping the temperature of the oil bath pan and continuously reacting; s5, after the reaction is finished, a polymer is precipitated out, and secondary cleaning is conducted through methyl alcohol. The preparation method has the advantages that oximido is introduced into a polyurethane molecular structure to fix metal ions, meanwhile, selenium is introduced in a covalent fixation mode, and through double-site introduction of the metal ions and the selenium, the molecular structure of the polyurethane is greatly improved; the NO catalytic release rate of the material can be regulated and controlled, so that the biocompatibility and applicability of the polymer material in a blood environment are improved, and the application scene is further widened.

The invention provides a mesoporous gypsum block and a preparation method thereof, and relates to the technical field of building materials and novel wall materials, the mesoporous gypsum block is prepared from the following raw materials by weight: 35-65 parts of hemihydrate gypsum, 40-60 parts of anhydrous II gypsum, 1.5-2.5 parts of nano mesoporous silica or modified nano mesoporous silica, 0.1-0.15 part of a polycarboxylic acid water reducer, 2-5 parts of a fiber reinforced material, and 90-150 parts of water. According to the invention, nano mesoporous silica is selected as a hard template agent and is compounded with two kinds of biphase gypsum, i.e., semi-hydrated gypsum and anhydrous II gypsum, so that the mesoporous gypsum block is generated, and the mesoporous gypsum block has a relatively strong pore skeleton structure and relatively good thermal stability, and has more excellent heat insulation performance compared with a traditional heat insulation material; energy is saved, consumption is reduced, space is saved, auxiliary materials are saved, and the service life is long.

The invention provides various crystal forms of an LEE011 intermediate and a preparation method thereof. Specifically, the invention provides an anhydrous crystal form of the LEE011 intermediate, namely Form A; the crystal form of the LEE011 intermediate is Form B; the crystal form of the LEE011 intermediate is Form C; the crystal form of the LEE011 intermediate is Form D; the crystal form of the LEE011 intermediate is Form E. The crystal form provided by the invention is stable in chemical property and easy to preserve, and the filtering performance is far better than that of a mixed crystal sample obtained by a current process. The preparation process is simple and feasible and is suitable for industrial production.

The invention belongs to the technical field of textiles, and discloses a waterproof coating of a textile fabric and a preparation method thereof.The preparation method includes the steps that S11, anhydrous tetrahydrofuran is added into a drying container to serve as a main solvent; s12, adding deionized water and an acid catalyst into the main solvent, and stirring and mixing; s13, dropwise adding tetraethoxysilane into a mixed system in the step S12 under a stirring condition, and continuously stirring at room temperature; s14, fluorine-containing alkoxy silane is dropwise added into a system in the step S13, and after dropwise adding is completed, sealing stirring is conducted at the room temperature, so that a super-hydrophobic membrane layer solution is obtained. The preparation method has the beneficial effects that the contradiction between easy dirt blockage and air permeability attenuation of a functional membrane is solved, and the problem that the air permeability of a microporous membrane is irreversibly reduced due to the fact that pores are easily blocked by grease and dirt is solved.

The invention belongs to the technical field of hydrates, and particularly relates to a method for removing crystal water of an inorganic hydrate at low temperature and simultaneously realizing structural transformation to obtain a stable anhydride. The preparation method comprises the following steps: mixing inorganic hydrate and acid liquor to obtain a mixture; the acid liquor comprises inorganic acid and a solvent, the inorganic acid is inorganic oxyacid corresponding to oxyacid radicals of the inorganic hydrate, the solvent is water or an aqueous solution, and the aqueous solution is a solution formed by water and polyol; covering the mixture and standing to obtain a material after standing; and carrying out heat treatment on the material after standing to obtain an intermediate product which comprises a stable anhydrous substance corresponding to the inorganic hydrate and an acid solution after the reaction is finished. According to the method provided by the invention, dehydration and structural transformation of the inorganic hydrate can be realized at a relatively low temperature, so that energy can be remarkably saved, carbon emission can be reduced, conditions in the whole reaction process are milder, the method is easier to implement, equipment investment is reduced, and the method is suitable for industrial application.

The invention belongs to the technical field of manufacturing of optoelectronic devices, and particularly relates to a stripping liquid additive for recycling waste liquid and a preparation method of the stripping liquid additive. The preparation method comprises the following steps: (1) reacting benzotriazole, concentrated hydrochloric acid and paraformaldehyde to obtain a first intermediate product; (2) mixing the first intermediate product, N, N-dimethylethylenediamine, anhydrous acetonitrile and an acid-binding agent, carrying out heating reaction under the protection of nitrogen, cooling to room temperature, and carrying out suction filtration, purification and vacuum drying to obtain a second intermediate product; and (3) mixing the second intermediate product, polyethylene glycol monomethyl ether, triphenylphosphine and anhydrous tetrahydrofuran, dropwise adding a toluene solution of diethyl azodicarboxylate, reacting, carrying out reduced pressure distillation, adding diethyl ether, separating out a solid, carrying out suction filtration, concentrating the filtrate, and carrying out purification, reduced pressure distillation and vacuum drying. The additive can improve the efficiency and effect of the stripping liquid, and is low in corrosivity.

The utility model relates to the technical field of magnesium sulfate production equipment, in particular to an anhydrous magnesium sulfate fluidization drying device which not only can collect and recycle water vapor and hot air, preheat raw materials and improve the energy utilization rate, but also can accelerate discharge of anhydrous magnesium sulfate and avoid product waste. Comprising a heating mechanism; the device comprises a heating mechanism, and further comprises a conveying mechanism, a collecting mechanism, an air exhaust mechanism, a steam exhaust mechanism and a preheating mechanism, the conveying mechanism is installed on the heating mechanism and drives anhydrous magnesium sulfate to be conveyed upwards, and the collecting mechanism is installed on the heating mechanism and collects dried anhydrous magnesium sulfate. The air extracting mechanism is mounted on the collecting mechanism and accelerates the anhydrous magnesium sulfate to enter the collecting mechanism, the steam exhausting mechanism is mounted on the air extracting mechanism and extracts steam in time, and the preheating mechanism is mounted on the air extracting mechanism and preheats raw materials.

The invention belongs to the technical field of preparation of hexafluoroisobutylene, and particularly relates to a preparation method of hexafluoroisobutylene, which comprises the following steps: adding an anhydrous tetrahydrofuran solvent into a high-pressure kettle under the condition of maintaining an inert atmosphere in the whole process; then adding a methyl triphenyl phosphorus bromide raw material, controlling the temperature in the high-pressure kettle to be stabilized at 0 DEG C in the process, adding a preset equivalent amount of organic alkali into the high-pressure kettle, continuously stirring and reacting for 4 hours at 0 DEG C in an inert atmosphere to obtain a tetrahydrofuran solution of methylene triphenyl phosphorus serving as a ylide reagent, reducing the temperature to-30 DEG C, and reacting for 2 hours at 0 DEG C in an inert atmosphere to obtain a tetrahydrofuran solution of methylene triphenyl phosphorus serving as a ylide reagent; introducing anhydrous hexafluoroacetone into the high-pressure kettle, reacting for 10 hours, slowly heating to 30 DEG C, and continuously stirring to react for 10 hours; according to the method, the reaction process is simple, the reaction conditions are mild, generated by-products are harmless and convenient to treat, continuous operation of a reaction device is guaranteed, the prepared hexafluoroisobutene product is high in purity and yield, and the preparation method has excellent industrial application prospects.

This invention relates to the field of medical devices and nursing care products, and in particular to an easily removable leak-proof ointment and its preparation method. The invention aims to construct a stable "oil-in-polyol gel" structure by pre-forming an "anhydrous gel phase" with specific types and proportions of polar polyols and hydrophilic colloids without introducing free water, and then finely dispersing it in a continuous oil phase composed of high-content polyisobutylene through a shearing process. The ointment of this application is completely anhydrous, eliminating all stability problems caused by the aqueous phase. Furthermore, by using medium-molecular-weight PIB, low-molecular-weight PIB, and liquid PIB, the ointment simultaneously possesses excellent leak-proof properties, low liquid absorption rate, and good thermal stability. This invention provides a stoma leak-proof ointment and its preparation method that combine excellent leak-proof properties, good extrudability, easy removal, and long-term stability.

The application belongs to the technical field of asphalt materials, and discloses a high-viscosity non-emulsified tack coat oil as well as a preparation method and application thereof. The high-viscosity non-emulsified tack coat oil comprises, in terms of mass fractions, 100 parts of tack coat asphalt, 40-80 parts of solvent and 3-5 parts of polymerization inhibitor. The tack coat asphalt comprises base asphalt, SBS and RET reactive elastomer terpolymer at a mass ratio of 100:2-4:3-6. The solvent comprises anhydrous tetrahydrofuran, limonene and octamethylcyclotetrasiloxane at a mass ratio of 100:60-100:10-20. The SBS and the RET reactive elastomer terpolymer are used to synergistically modify the base asphalt. The anhydrous tetrahydrofuran and the limonene are used in combination for the modified tack coat asphalt, which has the effect of synergistically increasing the solubility of the tack coat asphalt, so that the obtained tack coat oil has excellent flowability, permeability and high bonding strength and can be quickly dried, thereby reducing the risk of interlayer peeling of the ultra-thin overlay and improving the service life of the ultra-thin overlay.

The application discloses a preparation method of high-purity sodium clometocillin crystal. 6-amino penicillanic acid (6-APA) is used as a starting material, reacts with o-chloro acyl chloride, is subjected to acidification treatment, is subjected to extraction separation to obtain acid liquor for a salting reaction, a suitable salting agent is added into the acid liquor for the salting reaction to perform a salting reaction, and finally, through evaporation-coupling crystallization means, the sodium clometocillin crystal product with excellent powder performance and high purity is obtained. The preparation method particularly emphasizes the simplicity of operation, the high purity (the purity of anhydride is up to 97.6%) and excellent powder performance (particle size > 200 μm, angle of repose < 26.5°) of the product, and focuses on the optimization of product stability, so that the high quality and reliability of the product are ensured.

The present invention relates to an anhydrous composition for external use comprising an anhydrous substance, at least one living microorganism and a deliquescent substance.

This application discloses a weathering-resistant ultra-high water backfill material and its preparation method, relating to the field of backfill material technology. The weathering-resistant ultra-high water backfill material includes a permeable crystallization masterbatch, component A powder, and component B powder. The permeable crystallization masterbatch is composed of a modified silicone compound and an organosilicone compound mixed in a mass ratio of (5-8):(1-5). Component A powder includes: sulfoaluminate clinker, alumina clinker, lithium slag, tartaric acid, and hydroxypropyl methylcellulose ether. Component B powder includes: anhydrous phosphogypsum, quicklime, bentonite, and sodium carbonate. This application utilizes the modified silicone compound to induce condensation crystallization within the ultra-high water backfill material to block internal moisture loss. Simultaneously, the organosilicone compound generates a hydrophobic organosilicon molecular film on the surface of the ultra-high water backfill material to prevent internal moisture from permeating to the outside of the backfill, thereby obtaining an ultra-high water backfill material with weathering resistance and reducing strength loss after weathering.

The application discloses a preparation method of a pharmaceutical-grade disodium hydrogen phosphate, and belongs to the technical field of chemical raw medicine preparation. In the application, anhydrous sodium carbonate is used as an alkali source to react with phosphoric acid, no stirring device is arranged in the reaction process or only a basic rotating speed is used to maintain homogeneity of the system, and solid-liquid disturbance mixing is realized by using carbon dioxide gas generated in the reaction to escape; meanwhile, three-stage pH stepwise precise regulation and control are adopted to regulate and control the reaction process. The method can effectively avoid the generation of trisodium phosphate impurities caused by local over-alkalization, the content of trisodium phosphate in the finished product is less than or equal to 0.05%, the pH difference between batches of products is less than or equal to 0.1, the main content of anhydrous substance is 99.3% to 99.8%, and all indexes meet the pharmaceutical standards in the Chinese Pharmacopoeia. The energy consumption of concentration and evaporation in the process is 18% to 22% lower than that in the traditional sodium hydroxide method, the anhydrous sodium carbonate is not a dangerous chemical product, and the storage and transportation and compliance management costs are effectively reduced. The application has the advantages of simple process, strong stability and suitability for industrial large-scale production.

The application provides a method for preparing penicillin V potassium by a spray drying method, and belongs to the technical field of drug synthesis. In the method, potassium hydroxide and a mixed solution of strong alkali and weak acid potassium salt are salted at a specific temperature, and then negative pressure spray drying is performed at a low temperature. The method has the advantages of simple process flow, no need to use a large amount of solvent, no solid waste and waste liquid, and environmental protection. In addition, high-purity penicillin V potassium can be obtained. The results of examples show that, according to the method, the penicillin V potassium obtained has the purity of C 16 H 18 N2O5S is not less than 87%, the maximum single impurity is not more than 0.8%, the total impurity is not more than 2.1%, and the polymer is not more than 0.1%.

The invention relates to the technical field of retreatment of semi-hydrated ardealite, and belongs to a method for preparing high-quality anhydrous II gypsum from semi-hydrated ardealite. Comprising the following steps: (1) adding phosphorite, a washing solution E and a liquid phase D into a semi-water decomposition tank for initial reaction to obtain slurry A, adding the slurry A, a filtrate E and concentrated sulfuric acid into a semi-water crystal transformation tank for continuous reaction to obtain slurry B, filtering the slurry B, and washing with a filtrate H to obtain a solid phase C, the liquid phase D and the washing solution E; one part of the liquid phase D is finished phosphoric acid, and the other part returns to the semi-water decomposition tank; (2) transferring the solid phase C into an anhydrous crystal transformation tank, adding concentrated sulfuric acid, washing liquid I and filtrate H, and adjusting the reaction temperature to 70-95 DEG C; the reaction retention time is 1-6 hours, and obtaining slurry F; transferring the slurry F to a filter (2) for filtering, and washing with clear water to obtain a solid phase G, filtrate H and washing liquid I; the solid phase G is wet-based anhydrous gypsum II, one part of the filtrate H returns to the filter (1), and the other part of the filtrate H and the filtrate I return to the anhydrous crystal transformation tank.

The application discloses a kind of acetophenone derivatives and preparation method thereof, belong to organic synthesis field.The acetophenone derivative is 1-[3-methoxy-4-(1-ethyl pentyloxy) phenyl] ethanone, its preparation method includes: anhydrous tetrahydrofuran, 3-heptanol, 4-hydroxy-3-methoxy acetophenone and triphenyl phosphine are mixed, then cooling to 0~10 ℃ and keep in this temperature range drop to it azobisdimethyl valerate, after drop completion room temperature reaction 1~24 hours, again after processing is obtained.The application uses the product that can be easily purchased in market as starting material, and uses relatively safe solvent to carry out reaction, obtains higher reaction yield and high product purity, process flow operation is simple and has no harsh reaction condition, can overcome amplification effect, still maintains higher yield and high purity in kg level production, so as to be more suitable for industrialized production application.

The invention relates to a method for preparing high-quality anhydrous gypsum by a semi-hydrated-dihydrated-anhydrous recrystallization method, which comprises the following steps: adding phosphorite, washing liquor E and liquid phase D into a semi-hydrated decomposition tank for reaction to obtain slurry A; the slurry A, the washing liquid E and concentrated sulfuric acid are added into a semi-water crystal transformation tank for continuous reaction, and slurry B is obtained; filtering the slurry B by a filter and simultaneously introducing the filtrate I for washing to obtain a solid phase C; the solid phase C, the washing liquid J and clear water are added into a dihydrate conversion tank to be stirred, and slurry F is obtained and stays in the dihydrate conversion tank for 1-6 h; adding the slurry F, the filtrate I and concentrated sulfuric acid into an anhydrous crystal transformation tank, stirring to obtain slurry G, and staying in the anhydrous crystal transformation tank for 1-6 hours; the slurry G is filtered in a filter (2) and washed with clear water, a solid phase H, filtrate I and washing liquid J are obtained, the solid phase H is high-quality wet-based anhydrous gypsum II, and the method has the advantages that the phosphorus recovery rate is high, phosphogypsum harmless treatment is achieved, energy is saved, consumption is reduced, and the production cost is reduced.

The invention discloses a synthetic production method of white high-purity anhydrous silver tetrafluoroborate, which comprises the following steps: mixing and reacting mercury-free salt and anhydrous silver tetrafluoroborate in an anhydrous reaction medium to obtain anhydrous silver tetrafluoroborate; the mercury-free salt is at least one of anhydrous silver bis (trifluoromethanesulfonimide), anhydrous silver trifluoroacetate, anhydrous silver trifluoromethanesulfonate and anhydrous silver methanesulfonate; the tetrafluoroboric acid source is selected from at least one of anhydrous tetrafluoroboric acid and anhydrous tetrafluoroborate; the anhydrous reaction medium is at least one of absolute methanol, absolute ethyl alcohol, anhydrous dimethyl sulfoxide, anhydrous N-dimethylformamide, anhydrous dichloromethane, anhydrous tetrahydrofuran, anhydrous ethyl acetate, anhydrous ether, anhydrous petroleum ether, anhydrous isopropanol, anhydrous methyl acetate, anhydrous n-heptane, anhydrous cyclohexane and anhydrous acetone. According to the invention, the raw materials are non-toxic, no water is added or generated in the production process, and the prepared silver tetrafluoroborate is white, high in purity and free of crystal water.

The invention discloses a preparation method and application of a disulfonic acid derivative of 1, 3-dithiole-4, 5-diketone, and belongs to the technical field of battery electrolyte additives, a target product is a dimer of ethylene sulfate, the molecular formula is C4H6O8S2, and the molecular formula is C4H6O8S2. The preparation method comprises the following steps: S1, synthesizing an intermediate: reacting 2-bromoethanol with sulfuryl chloride under the action of organic alkali to generate the intermediate; s2, Grignard exchange reaction: in anhydrous tetrahydrofuran, carrying out Grignard exchange reaction on the intermediate and isopropyl magnesium chloride to generate a Grignard reagent; s3, carrying out metallization conversion reaction to generate an organic zinc reagent: carrying out metallization conversion reaction on the Grignard reagent and zinc chloride to generate the organic zinc reagent; and S4, cross-coupling reaction: in the presence of a palladium catalyst and a ligand, carrying out cross-coupling reaction on the organic zinc reagent and the intermediate of another molecule to obtain a target product, the invention not only provides an ethylene sulfate dimer synthesis path, but also develops the electrolyte additive with excellent performance.

A selenium-containing hyperbranched polymer (HBP), and a preparation method and application thereof are provided, belonging to the technical field of intelligent biomimetic materials preparation. The preparation method includes the following steps: preparing a compound M1; preparing an HBP; dissolving the compound M1 in anhydrous dichloromethane (DCM), adding anhydrous N,N-dimethylformamide (DMF) and oxalyl chloride, stirring an obtained mixture, and removing the anhydrous DCM and excess oxalyl chloride under reduced pressure to obtain a reactant A; under nitrogen protection, suspending the HBP and triethylamine (TEA) in anhydrous tetrahydrofuran (THF), and stirring to obtain a reactant B; and dissolving the reactant A in anhydrous THF, dropwise adding an obtained solution to the reactant B, heating an obtained mixture to room temperature, stirring, removing the anhydrous THF, redissolving an obtained product in anhydrous THF, and conducting dialysis to obtain the selenium-containing HBP.

The invention relates to the technical field of organic synthesis, and particularly discloses a synthesis method of (3aR, 6aR)-2, 2-dimethyl tetrahydro-3aH-cyclopenta [d] [1, 3] dioxol-4 (6aH)-ketone, which comprises the following steps: reacting D-ribose, acetone and acid to obtain a compound M1; reacting the compound M1, anhydrous tetrahydrofuran and a Grignard reagent to obtain a compound M2; reacting the compound M2, dichloromethane, water and sodium periodate to obtain a compound M3; reacting methyl triphenyl bromophosphorus, tetrahydrofuran, potassium tert-butoxide and the compound M3 to obtain a compound M4; the method comprises the following steps: reacting a catalyst, anhydrous dichloromethane and an M4 compound to obtain a reaction solution containing an M5 compound; and reacting the M5 compound, dichloromethane and manganese dioxide to obtain a target product. The synthesis process disclosed by the invention is short in route, simple in post-treatment, capable of achieving kilogram-level production, and suitable for industrial application amplified production.

This invention discloses a high-exchange-capacity porous cross-linked benzyl alcohol resin metal salt β-H elimination promoter, its preparation method, and its application, relating to the technical field of β-H elimination promoters. The technical solution is as follows: S1, potassium persulfate and hydroxyethyl cellulose are dissolved in water, 4-(vinylphenyl)methanol and divinylbenzene are added, and the reaction is carried out at 70-85℃ for 10-12 h under a nitrogen atmosphere; the white solid obtained by filtration is washed with water and ethanol, and dried to obtain polymerized microspheres; S2, anhydrous tetrahydrofuran is added to the polymerized microspheres, and sodium hydride is added in batches, and the reaction is carried out at 60-80℃ for 8-10 h; S3, the polymerized microspheres are cooled to room temperature, filtered, washed with methanol, tetrahydrofuran, and n-hexane, and dried to obtain a porous cross-linked benzyl alcohol resin sodium salt β-H elimination promoter. The porous cross-linked benzyl alcohol resin metal salt β-H elimination promoter prepared by this invention has advantages such as high metal salt content, strong alkalinity, and easy separation.

This invention belongs to the field of hydrate technology, specifically relating to a method for removing the water of crystallization from inorganic hydrates at low temperatures while simultaneously achieving a structural transformation to obtain a stable anhydrous product. The invention involves mixing the inorganic hydrate with an acid solution to obtain a mixture; the acid solution includes an inorganic acid and a solvent, wherein the inorganic acid is the inorganic oxyacid corresponding to the oxyacid anion of the inorganic hydrate, and the solvent is water or an aqueous solution, wherein the aqueous solution is a solution formed by water and a polyol; the mixture is covered and allowed to stand to obtain a settled material; the settled material is then heat-treated to obtain an intermediate product, which includes the stable anhydrous product corresponding to the inorganic hydrate and the acid solution after the reaction. The method provided by this invention can achieve dehydration and structural transformation of inorganic hydrates at relatively low temperatures, thereby significantly saving energy, reducing carbon emissions, and making the entire reaction process milder, easier to implement, reducing equipment investment, and suitable for industrial application.