126 results about "Chloromethyl methyl ether" patented technology

The invention provides a porous polymer material and a preparation method thereof. The porous polymer provided by the invention is prepared by crosslinking aromatic compounds with a crosslinking agent; the specific area of the porous polymer material is up to 2000 m<2>g<-1>, and the controllable range of the pore size is 0.3-100nm; and the porous polymer material can be used as a catalyst carrier, separation membrane, gas storage material and ion adsorbent. The preparation method comprises the following step: by using dimethoxymethane or chloromethyl methyl ether as the crosslinking agent andusing Lewis acid as the catalyst, crosslinking various aromatic compounds to obtain the porous polymer material by a one step method. The method has the characteristics of cheap and accessible raw materials and simple preparation technology, and the varieties of the aromatic compounds can be flexibly selected according to different application demands.

The embodiment of the invention discloses a polymeric adsorbent and a preparation method thereof. The preparation method comprises the following steps of: preparing a bead-like resin from chloromethyl styrene serving as a polymerization monomer and divinyl benzene serving as a cross-linking agent by a suspension polymerization method; and adding a hydroxyl-containing monomer at the post-crosslinking stage to perform super cross-linking reaction so as to prepare the polymeric adsorbent. In the method, pores are formed in the polymeric adsorbent at the post-crosslinking stage of polychloromethyl styrene by using a chemical modification method, and polar groups are formed on the frame of the polymeric adsorbent by introducing the hydroxyl-containing monomer for modification, so the adsorption of an adsorbent substance by the polymeric adsorbent is increased. The preparation method provided by the invention is simple and the substances harmful to human body such as chloromethyl ether and the like and pore-forming agents are not used in the method. Experimental results show that the polymeric adsorbent prepared by the invention has the advantages of high specific surface area, small aperture, high adsorption selectivity and particularly high capacity of absorbing aromatic compounds.

A monolithic bipolar membrane and a preparation method thereof relate to functional polymer membrane materials. The monolithic bipolar membrane includes a cation exchange layer and an anion exchange layer. Preparation method 1: basement membrane pre-irradiation; simultaneous grafting on both sides; sulfonation; quaternization. Preparation method two: basement membrane pre-irradiation; double-sided step-by-step grafting; sulfonation; quaternization. The preparation of bipolar membranes by radiation grafting technology not only saves the film-forming process in the traditional bipolar membrane preparation process, but also does not need to add initiators and catalysts during the grafting process, and the prepared bipolar membranes are very uniform and pure. The steps are simple, and the thermal stability and chemical stability of the film are better. Even if it is used for a long time, there will be no problems such as bubbling and cracking in the middle interface layer that are easy to occur during the use of composite bipolar membranes. Good mechanical properties, thermal stability and chemical stability. Avoid the use of strong carcinogenic reagents such as chloromethyl ether, and reduce the harm to the human body and the environment.

The invention relates to a ferric fluorescent probe compound as well as a preparation method and application thereof. The ferric fluorescent probe compound has the structure in formula I in the specification. The preparation method comprises the following steps: mixing rhodamine B with anhydrous ethanediamine and refluxing in ethyl alcohol to prepare amide of rhodamine; protecting hydroxyl of binaphthol by chloromethyl methyl ether, reacting with N,N-dimethylformamide under the action of butyl lithium, and removing methyl of methyl ether by hydrochloric acid to obtain binaphthol with aldehyde group; finally refluxing the amide of rhodamine and the binaphthol with aldehyde group in ethyl alcohol and washing to obtain the pure ferric fluorescent probe compound. The probe compound has favorable selectivity and sensitivity for the ferric ions, is simple to treat before sample detection and free of causing toxicity to cells, and is used for detecting the ferric ions in the water environment or the biological cells.

The invention discloses a method for preparing polyphenylene sulfide-based strong basic ion exchange fibers, which comprises the following steps of: first swelling raw polyphenylene sulfide fibers in a solvent, adding a raw material polyphenylene sulfide and a catalyst after the raw polyphenylene sulfide fibers are swelled, heating the mixture for chloromethylation and crosslinking reaction, and obtaining chloromethylated crosslinked polyphenylene sulfide fibers after the reaction is finished; then swelling the obtained chloromethylated crosslinked polyphenylene sulfide fibers in the solvent, adding trimethylamine solution after the chloromethylated crosslinked polyphenylene sulfide fibers are swelled, heating the reaction solution for quaternization reaction, and obtaining the polyphenylene sulfide-based strong basic ion exchange fiber products after the quaternization reaction is finished; and finally washing the products, and performing extraction, brine-washing and drying. The method for preparing the polyphenylene sulfide-based strong basic ion exchange fibers is simple and easy to industrially popularize and apply, and ensures relatively lower production cost. The products prepared by the method can be applied in the fields of treatment of industrial wastewater, air purification, preparation of ultrapure water, separation and extraction of medicinal chemicals, and the like.

The invention relates to a method for preparing macroporous alkalescent anion exchange resin, which sequentially comprises the following steps that: 1, mixed alcohol of butanol and dodecanol according to the mol ratio of 1:0.3 is used as porogens, benzoyl peroxide is used as initiating agents, and gelatin and a small amount of ammonium salt are used as dispersing agents, so styrene and divinylbenzene are crosslinked and copolymerized to obtain the styrene-divinylbenzene copolymers; the volume of the porogens is 1 to 1.2 times the sum of the volume of the styrene and the divinylbenzene, the mol ratio of the divinylbenzene to the styrene is (4-8):100; 2, under the catalytic effect of zinc chloride, chloromethyl methyl ether is used for carrying out chloromethylation on white balls, and chloromethylation copolymers are obtained; and 3, dimethylamine solution is used for ammonifying chlorine balls, and the macroporous alkalescent anion exchange resin is obtained. The method has the advantages that the mesopore proportion of the white balls is improved, the absorption speed of the ion exchange resin is accelerated, the white balls are ensured to have a certain number of small-hole proportions, and the exchange volume of the ion exchange resin is ensured.

The invention belongs to the field of ion polymers, and relates to a anion exchange membrane for alkaline fuel cells. The invention discloses an anion polymer, the repeating unit of which is shown in the diagram. The imidazolium salt-based novel polymer anion exchange membrane with good properties, which is prepared with the anion polymer, the preparation method overcomes the chemical stability of the quaternary ammonium salt polymer anion exchange membrane is poor,and also avoids the usage of chloromethyl methyl ether in the conventional polymer anion exchange membrane preparation process,and therefore the harm on the human body and the environment is reduced.

The invention belongs to the technical field of synthetic methods of ion exchange resin and especially relates to a synthetic method of strong-basic anion exchange resin used in a compact bed. The synthetic method includes the steps of: 1) synthesizing a crosslinked polystyrene white sphere framework being 100-150 nm in particle size on the surface of inert crystal nucleus in a homogenous-phase wet chemical manner; adding chloromethyl ether as a chloromethylation reagent to carry out a Friedel-Crafts reaction to benzene rings in the styrene in the crosslinked polystyrene white spheres to obtain an intermediate product A; 2) performing an amination reaction to the intermediate product A with a tertiary amine containing a long carbon chain to generate the strong-basic anion exchange resin being 180-280 [mu]m in particle size. The framework synthetic method is novel and unique. The exchange resin is fine and uniform in particle size, has large specific surface area, is short in diffusion path and has high exchange speed during exchange, and is low in cost and has good application effects. The exchange resin can satisfy application demands in the compact bed.

The invention relates to a recycling system of chlorination mother solution and a recycling method thereof in an automatic anion exchange resin production system, white ball and chloromethyl ether are sent to a chloromethylation reaction kettle respectively by an airflow transmitting system and pump transmission, stirring is carried out at normal temperature; after inflating, ferric trichloride dissolvable in the chloromethyl ether is added for catalysis, and exothermic reaction is generated, the adding speed of the chloromethyl ether is regulated according to temperature, chlorine ball is prepared after the temperature is raised to 48 DEG C and temperature insulation is carried out for 10 hours, temperature reduction is carried out, the separated chlorine ball is washed sequentially by chloride methanol for two times, and by methanol for one time; then, solid-liquid separation is carried out, solid-phase chlorine ball enters amination reaction, liquid-phase chlorination mother solution and chlorine ball cleaning solution enter a chlorination liquid recycling reaction kettle, chloride methanol generated in the chlorination liquid recycling reaction kettle enters a chloromethyl ether reaction kettle; and then, solid methanol and chlorine hydride are added in the chloromethyl ether reaction kettle for reaction, chloromethyl ether volatilized in the reaction process enters a chloromethylation reaction kettle after condensation by a condenser, and noncondensable gas enters an alkali spray tower for absorption treatment.

The invention relates to a diethylamine anion exchange resin and a preparation method thereof, belonging to the technical field of anion exchange resins. The resin is prepared from the following raw materials in parts by weight: 10-20 parts of macroporous styrene-divinylbenzene copolymer microsphere, 100-120 parts of dichloromethane, 15-25 parts of anhydrous aluminum trichloride, 10-20 parts of chloracetyl chloride, 5-9 parts of chloracetylated resin, 50-60 parts of diethylamine, 50-60 parts of tetrahydrofuran and 3-12 parts of NaHCO3. Chloracetylation reaction is performed on crosslinked polystyrene microspheres by Friedel-Crafts reaction to introduce chloracetyl group, and amination is performed to obtain the weakly alkaline tertiary-amine anion exchange resin. The method avoids using chloromethyl ether and other carcinogenic substances, and avoids secondary crosslinking, polysubstitution and other side reactions.

The invention discloses a preparation method of crisaborole. The method comprises the steps as follows: a compound shown in a formula I and alkali metal borohydride are subjected to a contact reaction, and a compound shown in a formula II is obtained; the compound shown in the formula II and a compound a are subjected to a contact reaction, and a compound III is obtained; or the compound shown inthe formula II and dihydropyran are subjected to a contact reaction, and a compound III is obtained, wherein the compound a is trimethylchlorosilane, tert-butyldimethylsilyl chloride or chloromethyl methyl ether; the compound shown in the formula III and an isopropylmagnesium chloride solution are subjected to a contact reaction, and a standby solution is obtained; then, the standby solution is added to a mixed solution of a compound b and a third organic solvent for a contact reaction, hydrochloric acid is added for a contact reaction, and crisaborole, namely, a compound shown in a formula IV, is obtained, wherein the compound b is 2-alkoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane, triisopropyl borate or trimethyl borate.

The invention relates to a production system used for anion exchange resin and production technology. The production technology comprises chloromethylether production technology, chloromethylation production technology, chlorine ball cleaning technology, an amination reaction, and washing technology and obtains the finished product anion resin finally. Chloromethylether needed by producing the anion resin first time is prepared by a chemical reaction generated by solid formaldehyde, methanol and gas hydrochloric acid. The system and the technology are characterized in that a chloridization mother liquor generated by the chloromethylation production technology and a cleaning solution generated by the chlorine ball cleaning technology are sent to chloridization solution recovering technology. Chloridization methanol in the chloridization mother liquor reacts with the additive solid formaldehyde and chloride hydrogen gas to obtain the chloromethylether directly taken as a raw material for circulating the anion resin production and circulate in the way to obtain the chloromethylether.

The invention discloses a preparation method of a Crisaborole intermediate. The Crisaborole intermediate has a structure shown as the formula VI. The preparation method comprises the following steps:performing a contact reaction on a compound shown as the formula I and benzyl halide, so as to form a compound shown as the formula II; performing a contact reaction on the compound shown as the formula II and alkali metal borohydride, so as to obtain a compound shown as the formula III; performing a contact reaction on the compound shown as the formula III and a compound a, or performing a contact reaction on the compound shown as the formula III and dihydropyran, so as to obtain a compound shown as the formula IV, wherein the compound a is trimethylchlorosilane, tert-butyldimethylsilyl chloride and chloromethyl methyl ether; performing a contact reaction on the compound shown as the formula IV and an isopropylmagnesium chloride solution; adding an obtained solution into a compound b, performing a contact reaction on the mixture and fourth organic solvent mixed liquor and adding hydrochloric acid into the mixture for contact reaction, so as to obtain a compound shown as the formula V,wherein the compound b is 2-alkoxy-4, 4, 5, 5-tetramethyl-1, 3, 2-dioxaborolane, triisopropyl borate or trimethyl borate; performing a hydrogenation reaction on the compound shown as the formula V toobtain a compound shown as the formula VI.

The invention belongs to the technical field of analytic chemistry, and particularly relates to a method for determining the content of chloromethyl methyl ether in automotive materials. The method comprises the following determining steps: (1) cutting a to-be-determined sample into small cubes with sizes of about 2mm*2mm*2mm, and sealing for later use; (2) weighing a certain amount of sample and placing the sample in a headspace bottle, adding acetone, adding toluene-d8 as an internal standard, after fastening the bottle cover down, placing in a headspace sampler; and (3) determining the content of chloromethyl methyl ether in a sample by adopting a gas chromatography-mass spectroscopy meter. According to the method, the content of chloromethyl methyl ether in the automotive materials is determined by adopting the gas chromatography-mass spectroscopy meter, and is quantified by adopting an internal standard method; the method is little in sampling amount, simple in pretreatment operation, and rapid in testing; accurate determination of the content of chloromethyl methyl ether in the automotive materials can be realized, and the detection limit of the method is 100mg/kg.

The invention discloses a method for synthesizing plasticizer 3-nitro furazan-4-methyl ether. The method comprises the following steps: adding hydroxylamine under the alkaline condition by taking ethyl cyanoacetate as a starting material to form a ring, so as to obtain 3-amino furazan-4-carboxylic acid; then, reducing carboxyl group on the furazan ring to an alcoholic extract hydroxyl group by using a sodium borohydride/zinc chloride system, so as to obtain 3-amino furazan-4-methanol; then, oxidizing an amino group on the furazan ring to a nitro group by using a hydrogen peroxide/concentrated sulphuric acid system, so as to obtain 3-nitro furazan-4-methanol; in the presence of pyridine, carrying out chloride substituent on the alcoholic extract hydroxyl group by using thionyl chloride, so as to obtain 3-nitro-4-chloromethyl methyl ether furazan; and finally, reacting 3-nitro-4-chloromethyl methyl ether furazan with sodium methoxide in acetonitrile to remove NaCl so as to obtain the target compound. Compared with the traditional nitrate plasticizer, the plasticizer synthesized by using the method has higher positive enthalpies of formation and thermal stability, lower sensitivity and melting point, and has potential application prospect in the field of solid propellants.

The invention provides a block type anion exchange membrane containing dense ion strings, and a preparation method thereof, wherein the block type anion exchange membrane can be used for an alkaline fuel cell, and is structurally characterized in that a plurality of ion strings are densely grafted on a hydrophilic segment of a block copolymer to serve as functional groups. The preparation method mainly comprises the following steps: (1) preparing a hydrophilic segment containing tetraphenylmethyl and a hydrophobic segment containing a suspended nitrile group; (2) preparing a block copolymer, and carrying out bromination modification; and (3) preparing the block type anion exchange membrane containing the dense ion strings. According to the invention, the anion exchange membrane prepared bythe method has a developed ion transmission channel, has the characteristics of high water content and low swelling rate, and overcomes the defect that the existing anion exchange membrane cannot have high water content, high conductivity and low swelling rate at the same time; and a highly toxic carcinogenic chloromethyl ether reagent is not used in the preparation process, so that the membranehas a wide application prospect in the field of alkaline fuel cells.

The invention discloses a PP-ST-DVB-based cation exchange fiber and a synthesis method thereof, and belongs to the technical field of polymer materials. A PP-ST-DVB fiber is taken as a raw material fiber, a benzene ring on the PP-ST-DVB fiber and an organic compound containing an intramolecular acid anhydride group are subjected to a reaction under the action of a catalyst, carboxyl is introduced,and the fiber material containing carboxyl is obtained. The fiber material has high carboxyl content, maintains good shape, elasticity and strength, and has application prospect in functional textiles, water and air purification, chemical substance separation and extraction, and the like. According to the synthesis method, carboxyl is introduced into the polypropylene fiber grafted with styrene with a one-step method, so that the use of carcinogens such as chloromethyl ether in the traditional synthesis method is avoided, and the synthesis method is simple in process, mild in condition and easy to control.

The invention discloses a preparation method of 5'-((5-methoxyl-2-phenyl indole-1-yl) methylene)-2'-oxo-3'-tetrahydrofurfuryl which is an antineoplastic compound. The method comprises the following steps: performing reformatsky reaction on 2-(2-phenyl-5-methoxyl indole-1-yl) acetaldehyde and Alpha-bromine ethyl methacrylate to obtain the compound. Ethyl benzoylacetate and aminoethanol are used as raw materials and are condensed to obtain N-hydroxyethyl amino-3-ethyl phenylacrylate which makes a synthetic reaction with benzoquinone by Nenitzescu indole to remove an ester group at 3-position, and 2-(2-phenyl-5-hydroxyl indole-1-yl) ethanol is obtained; then 2-(2-phenyl-5-hydroxyl indole-1-yl) ethanol and chloromethyl methyl ether react to obtain a product, and the product is oxidized to obtain 2-(2-phenyl-5-methoxyl indole-1-yl) acetaldehyde. The invention has short route, mild reaction condition, convenient aftertreatment, cheap and easily-obtained reagent and avoids using dangerous hypertoxic reagents, thereby not only lowering the cost, but also being suitable for industrial production.