12 results about "Chloromethyl methyl ether" patented technology

The utility model belongs to the technical field of chloromethyl methyl ether production, and particularly relates to a transmission debugging device for chloromethyl methyl ether production, which comprises a pair of reaction kettles, an air exhaust assembly is arranged between the pair of reaction kettles; a top cover is arranged at the top of the reaction kettle; a shell is arranged outside the reaction kettle; a heating pipe is fixedly connected to the middle of the side wall of the shell. An air outlet is formed in the middle of the side wall of the heating pipe; a vent hole is formed in the middle of the side wall of the shell; the vent hole and the air outlet hole are correspondingly arranged; through the arrangement, the temperatures for generating hydrogen chloride gas and chloromethyl methyl ether can be respectively debugged, and the excessively high temperature in the reaction kettle can cause the hydrogen chloride gas and chloromethyl methyl ether to decompose or deteriorate, so that the quality and stability of the generated hydrogen chloride gas and chloromethyl methyl ether are influenced; by adjusting the temperature, the original chemical properties of the product can be kept in the generation process, and meanwhile, the generation of impurities is reduced by adjusting the reaction temperature, so that the purity of the product is improved.

This application relates to the field of polymer materials, specifically disclosing a resin for removing nitrate nitrogen from high-concentration sulfate solutions and its preparation method. The preparation method includes the following steps: S1, dispersing an oil-phase solution containing styrene, divinylbenzene, a porogen, and an initiator in an aqueous solution, polymerizing, and then washing with a solvent to obtain porous polymer spheres; S2, subjecting the obtained porous polymer spheres to chloromethyl ether for chloromethylation treatment to obtain a pre-modified resin; S3, subjecting the pre-modified resin to an amination reaction with an amination reagent to obtain a nitrate-removed resin; the nitrate-removed resin has a pore size of 2-10 nm accounting for 50-90%; this application also discloses the nitrate-removed resin prepared by the above preparation method. This application has the characteristic of achieving the removal of nitrate nitrogen from high-concentration sulfate wastewater.

The invention relates to the technical field of hydrogen energy preparation and impurity removal, in particular to high-alkali-resistance ion exchange resin for hydrogen energy preparation and impurity removal, which is prepared from the following raw materials: styrene, divinylbenzene, a pore-foaming agent, an initiator, an inorganic modifier, chloromethyl ether, an amination reagent and a polymerization inhibitor. The inorganic modifier is SiO2 (silicon dioxide) nano particles or TiO2 (titanium dioxide) nano particles modified by gamma-aminopropyl triethoxy silane; the amination reagent is N, N-dimethyl cyclohexylamine. Through an inorganic and organic synergistic modification strategy and optimized selection of an amination reagent with better alkali resistance, activity attenuation and structural deterioration of functional groups of the resin in a high-alkali environment are effectively inhibited, capacity loss of the resin in long-term operation is remarkably reduced, the service life of the resin is greatly prolonged, and the service life of the resin is prolonged. The long-term operation requirement of a high-alkali working condition in a hydrogen energy preparation process can be fully met, the resin replacement frequency is reduced, and the process operation cost is reduced.

The invention provides a method for removing aluminum from rare earth leaching liquid, and relates to the technical field of metal extraction technologies. A method for removing aluminum from rare earth leachate comprises the following steps that S1, styrene and divinylbenzene are mixed, then a pore-foaming agent is added, and an organic phase is obtained after stirring; s2, dissolving polyvinyl alcohol in deionized water, and stirring until the polyvinyl alcohol is completely dissolved to obtain a water phase; s3, slowly adding the organic phase into the water phase, stirring to form a stable suspension, and transferring the stable suspension to a reaction kettle; s4, introducing nitrogen into the reaction kettle, heating, and polymerizing to obtain resin white balls; and S5, mixing the resin white balls with chloromethyl ether. The D290 resin is matched with the 5-sulfosalicylic acid for use, so that the separation difficulty of the complex is reduced. According to the novel technology, efficient aluminum removal can be achieved under the mild condition, rare earth loss is reduced, and the technology is environmentally friendly; through complexing condition optimization, adsorption process design and gradient regeneration technology, directional removal of aluminum ions and cyclic utilization of resin are realized.

The invention discloses a recovery method of sevoflurane water-alcohol mother liquor, and belongs to the technical field of medicines. The method comprises the following steps: adding perlite into sevoflurane water-alcohol mother liquor, removing fluorine ions to obtain a fluoride-free water-alcohol solution, carrying out reduced pressure distillation on the solution to remove water, adding an inert organic solvent, recovering solid which is high-purity metal chloride, carrying out reduced pressure recovery on liquid which is the organic solvent, and recovering the residual solvent which is a high-boiling-point alcohol solvent; the sevoflurane water-alcohol mother liquor is a water phase obtained by adding water into a reaction solution of chloromethyl ether and alkali metal fluoride in a high-boiling-point alcohol solvent and carrying out phase splitting. Particularly, a reaction product metal chloride and high-boiling-point alcohol in the reaction are recycled. The benefit maximization of the sevoflurane process is realized, the three wastes are reasonably treated, and the comprehensive utilization of resources is realized.

The application relates to the technical field of iron phosphate preparation, in particular to a high-purity iron phosphate material and a preparation method thereof. The preparation method of the high-purity iron phosphate material provided by the application comprises the following steps: mixing polystyrene microspheres, chloromethyl methyl ether, a first catalyst and an organic solvent to obtain primary modified polystyrene microspheres; mixing the primary modified polystyrene microspheres, aminomethyl phosphonic acid, a second catalyst, a cocatalyst and an organic solvent to obtain secondary modified polystyrene microspheres; mixing an iron source solution and a phosphorus source solution, then adding the secondary modified polystyrene microspheres to carry out reaction, and baking to obtain the high-purity iron phosphate material. The iron phosphate material obtained by the method has low impurity content and high tap density, and the preparation method is relatively simple, low in energy consumption and convenient to operate.

The invention provides an anionic membrane as well as a preparation method and application thereof. The preparation method of the anionic membrane comprises the following steps: S1, prepolymerization: dissolving a first unsaturated monomer containing a halogen group, a second unsaturated monomer and an initiator in an organic solvent, and carrying out polymerization reaction after dissolving to obtain a membrane casting solution; s2, curing: coating a supporting base material with the membrane casting solution, and curing to form a membrane; s3, functional modification: transferring a membrane into an organic amine solution for soaking after the membrane is completely cured to form a membrane, and fully reacting to obtain a functional modified anionic membrane; the molar ratio of the first unsaturated monomer to the second unsaturated monomer is 1: (0.03-0.10). According to the preparation method, the use of high-carcinogenicity chemicals such as chloromethyl methyl ether is avoided, the green production of the high-performance anion membrane is realized, the accurate regulation and control of the physical and chemical properties of the anion membrane are also realized, and higher current efficiency and lower unit energy consumption are obtained when the anion membrane is applied to the salt concentration test of electrodialysis.

This invention discloses a method for preparing polyphenylene sulfide (PPS)-based chelated fibers. PPS fibers are added to a reactor, and a solvent is added to allow them to swell fully. A crosslinking agent and a catalyst are then added to carry out the reaction. The resulting product is treated to obtain crosslinked PPS fibers. The crosslinked PPS fibers are then added to a solvent to swell, followed by the addition of a nitrifying agent to carry out the reaction. The product is then treated to obtain modified nitrated fiber PPS-NO2. The modified nitrated fiber PPS-NO2 is then added to a solvent to swell, followed by the addition of a reducing agent to carry out a reduction reaction. The product is then treated to obtain amino-based PPS-NH2. The amino-based PPS-NH2 is then added to a solvent, followed by the addition of a functional monomer to carry out a grafting reaction, yielding the product, polyphenylene sulfide-based chelated fibers. Using this invention to prepare chelated functional fibers effectively avoids the drawbacks of using highly carcinogenic substances such as chloromethyl ether in existing technologies. Furthermore, the polyphenylene sulfide-based chelated fibers prepared by this invention exhibit good stability and acid and alkali resistance.

The utility model belongs to the field of chloromethyl methyl ether raw material conveying devices, and particularly relates to a raw material conveying device for chloromethyl methyl ether manufacturing. A methanol inlet and a formaldehyde inlet are fixedly connected to the side wall of the bottom end of the reaction furnace; a hydrogen chloride input pipe is fixedly connected to the side surface of the case; a gas channel corresponding to the hydrogen chloride input pipe is formed in the case; methyl alcohol is introduced into the reaction furnace from the methyl alcohol inlet, formaldehyde is introduced into the reaction furnace from the formaldehyde inlet, after the methyl alcohol and the formaldehyde are fully mixed, an internal air pump of the hydrogen chloride gas conversion box is driven immediately, and a hydrogen chloride solution is introduced into the machine box through the hydrogen chloride input pipe, so that hydrogen chloride gas passes through a mixed solution of formaldehyde and methyl alcohol from bottom to top; finally carrying out reaction; the methanol inlet and the formaldehyde inlet are oppositely arranged, so that the mixing rate of formaldehyde and methanol is increased, hydrogen chloride gas passes through a solution from bottom to top through the hydrogen chloride input pipe on the side wall of the case, and the reaction rate of raw materials is increased.

The invention provides a preparation method of macroporous resin for recovering noble metals, which belongs to the technical field of resin synthesis, and comprises the following steps: preparing hexahydropyridine by pyridine catalytic hydrogenation; rectifying the hexahydropyridine to obtain high-purity hexahydropyridine; preparing macroporous white balls by taking styrene, divinylbenzene, a pore-foaming agent, an initiator and a dispersing agent as raw materials; eluting the macroporous white balls to form holes; carrying out chloromethylation reaction on the macroporous white balls subjected to elution pore forming and chloromethyl ether; and carrying out amination reaction on the chloromethylated macroporous white balls and high-purity hexahydropyridine to obtain the macroporous resin. According to the preparation method of the macroporous resin for recovering the precious metal, the prepared macroporous resin is excellent in adsorption performance and long in service life under the conditions of high acid and strong oxidants.

The application discloses a preparation method of a novel MOM-protected C3 side chain of cefodizime, and belongs to the technical field of pharmaceutical synthesis intermediates. The method is as follows: 2-chloro-3,4-dihydroxybenzaldehyde is used as raw material, and chloromethyl methyl ether (MOMCl) or bromomethyl methyl ether (MOMBr) is used to protect two phenolic hydroxyl groups. After the aldehyde group is oxidized into a carboxylic acid by using a Pinnick method, the carboxylic acid is condensed with 2-chloroethylamine to obtain an amide, and finally, the amide is reacted with tetrahydropyrrole to obtain the target product: 2-chloro-3,4-bis(methoxymethoxy)-(2-(pyrrol-1-yl)ethyl)benzamide. N The application has mild reaction conditions and simple operation, and is suitable for industrialized production of cefodizime.