100 results about "Chloroethane" patented technology

The invention relates to a preparation method of a lithium difluoro bis (oxalate) phosphate concentrated solution, and belongs to the technical field of lithium battery electrolyte additives. Adding lithium oxalate into a solvent, stirring and dissolving to obtain a lithium oxalate solution; the method comprises the following steps: adding a modified fluorine ion chelating agent into a lithium oxalate solution, stirring, filtering, putting into a reactor, and slowly introducing phosphorus pentafluoride gas; after the introduction is finished, heating and stirring for reaction; after the reaction is finished, filtering reaction liquid to remove unreacted solid impurities, so as to obtain a lithium difluoro bis (oxalate) phosphate concentrated solution; the modified fluorine ion chelating agent is prepared from D301 ion exchange resin, dichloroethane, propylene-1-base boronic acid pinacol ester, mercaptoethyl guanidine dihydro bromide and sodium tert-butoxide. The lithium difluoro bis (oxalate) phosphate prepared by the method is high in purity and high in yield, and meets the use requirements of lithium ion battery electrolyte on lithium salt.

The invention discloses a method for preparing vinyl chloride by electrocatalytic dechlorination of 1, 2-dichloroethane, a working electrode of the method takes a metal oxide as a catalyst, and the metal oxide is selected from at least one of the following metal oxides: Pd, Mn, Fe, Co, Ni, Cu, Ru and Mo. According to the invention, the metal oxide powder is used as the electrocatalyst, the catalyst is coated on the electrode material to prepare the working electrode, the working electrode is applied to electrocatalytic dechlorination reaction of 1, 2-dichloroethane, vinyl chloride can be generated at high selectivity at room temperature, a new way is opened up for production of vinyl chloride by electrocatalytic dechlorination, and the method has wide application prospect. And a green and low-cost solution is provided for efficient synthesis of vinyl chloride.

The application discloses a high-beta-crystal-phase polyvinylidene fluoride fiber piezoelectric film and a preparation method thereof, wherein the preparation method comprises the following steps: step one: polyvinylidene fluoride resin with a weight average molecular weight of 500,000-800,000, a long branched chain content of 1.2‰-5‰, and a 7% mass fraction NMP solution rotary viscosity of 5000-8000 mpa.s at 25 DEG C is prepared by emulsion polymerization of polyvinylidene fluoride monomer and difluoro-monochloroethane; and step two: the polyvinylidene fluoride resin obtained in step one is made into an electrostatic spinning precursor solution, and the electrostatic spinning precursor solution is spun and film-formed by an electrostatic spinning method. The polyvinylidene fluoride nanofiber film with finer and higher beta-crystal-phase content can be prepared by adjusting the content of the long branched chain and the viscosity of the electrostatic spinning solution.

A process is disclosed for producing ethylene dichloride from monoethylene glycol and hydrogen chloride in the presence of water, thereby forming an ethylene dichloride-rich liquid phase that can be readily separated from a coexisting aqueous phase. The reaction is carried out under conditions that limit both 2-chloroethanol and ethylene dichloride in the vapor phase, facilitating high conversion efficiencies and minimizing ethylene dichloride losses. The process includes a reaction step in which monoethylene glycol is converted to 2-chloroethanol and subsequently to ethylene dichloride, generating water that aids in separating by-products from the ethylene dichloride-rich phase. A phase-separation system is employed to decant the heavier, ethylene dichloride phase from an aqueous phase containing residual reactants and by-products. Additional purification steps, such as washing with substantially anhydrous monoethylene glycol, further remove water, acids, and 2-chloroethanol, producing high-purity ethylene dichloride. Recycling unconverted monoethylene glycol and 2-chloroethanol to the reactor increases overall conversion and enhances process economics.

The application discloses a preparation method of acetic acid 2,2-difluoroethyl ester and belongs to the technical field of battery electrolyte additives. The application takes alkali metal acetate and 2,2-difluoro-1-chloroethane as reaction raw materials, prepares acetic acid 2,2-difluoroethyl ester in dimethyl sulfoxide, and then adopts a post-treatment process of extracting the reaction liquid first and then distilling, so that the problem that the interaction between dimethyl sulfoxide and the product is difficult to distill is effectively avoided, and problems, such as the decomposition of dimethyl sulfoxide at high temperature to reduce the purity of the product and the combination of the decomposition product and the product, are also avoided. Meanwhile, the reaction condition of the application is mild, the operation is simple, a complex catalytic system is not needed, and the application does not depend on specific reaction equipment, so the application has a good large-scale industrial production prospect.

The filter device comprises a fixed barrel, a delivery pump and a filter cartridge, the input end of the delivery pump is fixedly installed at one end of a connecting pipe, the other end of the connecting pipe is fixedly installed in one side of the fixed barrel, and the output end of the delivery pump is fixedly installed at one end of a delivery pipe. And the other end of the conveying pipe is fixedly mounted in one side of the purifying tower. By arranging the filter cartridge, impurities in a liquid mixture can be effectively filtered before the liquid mixture enters the purifying tower, the rectification effect is prevented from being influenced, and the filter cartridge is provided with the notch, the rubber gasket, the fixed block, the limiting clamping groove, the connecting block, the sliding groove, the spring, the sliding block, the limiting clamping block, the shifting block, the handle and the like; the sealing cover can be installed and fixed through the connection of the sealing cover, the rubber gasket and the notch and the connection of the limiting clamping block and the limiting clamping groove, the sealing cover is convenient to disassemble and assemble through the arrangement of a handle, a shifting block and the like, and the operation is more labor-saving compared with the operation of screwing the sealing cover.

The invention discloses a preparation method of tris (2-cyanoethyl) phosphate, which comprises the following steps of: 1, adding 3-hydroxypropionitrile, an organic alkali acid-binding agent and a reaction organic solvent which is one of dichloromethane and dichloroethane into a reaction container, and reacting at the temperature of between 20 and 30 DEG C for 1 to 3 hours; controlling the temperature not to exceed 20 DEG C, dropwise adding a mixture formed by phosphorus trichloride and a reaction organic solvent, after dropwise adding is completed, performing heating reflux reaction, and after the reaction is completed, performing suction filtration to remove generated organic alkali hydrochloride so as to obtain filtrate; and 2, controlling the temperature of the filtrate obtained in the step 1 at 30-40 DEG C, introducing oxygen for reaction until the reaction is finished, and removing the reaction organic solvent to obtain the final product tris (2-cyanoethyl) phosphate. The method has the advantages of simplicity in operation, mild and controllable reaction, high product purity and suitability for industrial popularization.

The invention relates to a device and a method for producing partially chlorinated alkanes by means of a direct chlorination of alkenes. In particular, the invention relates to a device and a method for producing 1,2-dichloroethane by means of a direct chlorination of ethene (synonym: ethylene). The invention is characterized in that a loop reactor is used for the direct chlorination, wherein the outlet for the produced partially chlorinated alkane is provided on a vertical position of the loop reactor (in the operating state) on a lateral wall of the loop reactor, the vertical position being situated below half the height of the loop reactor.

The application provides a synthesis method of 9,10-dibromoanthracene, by introducing HBr generated by a solvent water adsorption reaction, using an industrial sodium hypochlorite solution to react the HBr into bromine, ensuring high concentration of bromine, introducing a solvent dichloroethane to uniformly disperse raw materials, keeping the concentration of bromine stable in the reaction, greatly promoting the reaction speed, greatly shortening the reaction time, and converting the sodium hypochlorite into a sodium chloride aqueous solution after the reaction is completed. The purity of the prepared 9,10-dibromoanthracene is more than 99%, and the by-products generated in the reaction are environment-friendly and non-polluting.

The application discloses a preparation method and application of a catalyst for cracking 1,2-dichloroethane to produce vinyl chloride, and comprises the following steps: 1) a neodymium ore is leached with hydrochloric acid, and after filtering a leaching solution, potassium chloride is added to form a doped precursor K2[NdCl3]; 2) an active metal oxide is dissolved in hydrochloric acid, and then added into the doped precursor K2[NdCl3] solution, and co-precipitation is carried out by adding alkali to obtain an emulsion of a doped active component; the active metal oxide is at least one of oxides of vanadium, manganese, titanium and scandium; 3) the emulsion of the doped active component is mixed with a liquid carrier to obtain the catalyst; the liquid carrier is one or more of chloroform, carbon tetrachloride, 1,1,2-trichloroethane and chlorobenzene.

A kettle cover is arranged at the top end of a kettle body, a plurality of second connecting plates are arranged on the periphery of the kettle cover, the second connecting plates correspond to first connecting plates of the kettle body in a one-to-one mode and are connected with the first connecting plates of the kettle body in a fastening mode, and an inwards-concave surrounding plate is arranged at the bottom of the kettle cover and connected with the inner wall of the kettle body. An annular groove is formed in the outer edge of the inwards-concave surrounding plate, a sealing ring is arranged in the annular groove formed in the inwards-concave surrounding plate, the sealing ring is pressed on the inner wall of the kettle body and the inner wall of the kettle cover, a plurality of first reinforcing plates are evenly arranged on the sealing ring in the radial direction, the bottoms of the first reinforcing plates are connected with the inner wall of the inwards-concave surrounding plate, and a stirring paddle is arranged in the kettle body. Meanwhile, a plurality of first reinforcing plates are arranged in the kettle cover, and the bottoms of the first reinforcing plates are supported on the concave coaming, so that the supporting performance of the kettle cover and the concave coaming is greatly improved, leakage caused by deformation of the kettle cover or the concave coaming in the long-term use process is avoided, and the service life is prolonged.

The utility model discloses a dichloroethane dehydration system and belongs to the technical field of rectification and purification. According to the technical scheme, the dichloroethane dehydration system comprises a refined dichloroethane cooler, a dehydration tower feeding / discharging heat exchanger, a dehydration tower, a dehydration tower top condenser, a mixer, a dehydration tower top reflux tank and a controller, an inlet of the dehydrating tower feeding / discharging heat exchanger is connected with a wet dichloroethane feeding pipeline, the wet dichloroethane feeding pipeline is provided with a first flow transmitter and a first flow adjusting valve, an outlet of the dehydrating tower feeding / discharging heat exchanger is connected with the dehydrating tower through a pipeline, and the bottom of the dehydrating tower is connected with a dehydrating tower bottom reboiler. The bottom of the dehydrating tower is also connected with a refined dichloroethane discharging pipeline; and the refined dichloroethane discharging pipeline is provided with a dehydrating tower bottom discharging pump, a refined dichloroethane cooler, a discharging regulating valve, a flow transmitter II and a water analyzer. The device has the advantages of high separation effect, continuous, stable and reliable operation and obvious economic effect.

The application discloses a synthesis method of 2,2-difluoroethylamine, which comprises the following steps: mixing a solvent, a copper-based catalyst and an ammonia source in a sealed container, wherein the ammonia source is gaseous, liquid or supercritical ammonia; heating the mixed system to 80-120 DEG C; adding 2,2-difluoro-1-chloroethane; keeping the reaction for a certain time; filtering the reaction liquid; and distilling the filtrate to obtain 2,2-difluoroethylamine. The reaction selectivity and reaction yield of the method are obviously improved compared with the prior art. The insoluble copper salt and organic ligand are adopted in the form of the catalyst, so that the catalyst recovery is simple and convenient, the ammonia excess ratio can be reduced in the reaction process, the energy consumption for ammonia recovery is greatly saved, the reaction yield is high, the amount of three wastes is small, and large-scale industrial production can be easily realized.

The application relates to a method for preparing graphene by solid-liquid in-situ reaction and graphene prepared by the method. The method comprises the following steps: heating and melting magnesium or a magnesium alloy in a crucible to obtain a melt; adding solid hexachloroethane into the melt at a speed of 1 g / min to 20 g / min and performing mechanical stirring, and then standing to obtain a mixture containing graphene above the melt; the mass amount of the solid hexachloroethane is 2% to 5% of the mass of the melt; separating the obtained mixture containing graphene from the melt; and performing post-treatment on the mixture containing graphene separated from the melt to obtain graphene. The application provides a method for preparing graphene in large quantities at low cost, with high production efficiency and high quality; the method has the advantages of simple operation, simple production equipment, low production cost, high yield, high graphene quality, fewer defects and impurities, excellent product performance and the like.

The utility model discloses a chloroethane condenser which comprises a tank body and a heat preservation pipe, the heat preservation pipe is fixedly connected to the tank body, the tank body is provided with a medium pipe and an air inlet pipe, the air inlet pipe is provided with a condensation pipe, the condensation pipe is inserted into the heat preservation pipe, the condensation pipe is provided with a first fin, and the heat preservation pipe is internally provided with a second fin. The first fins and the second fins are arranged in a staggered mode, cooling media enter the heat preservation pipe through the medium pipe and flow along gaps between the first fins and the second fins, and therefore the condensation pipe can conduct condensation fully. A cooling medium surrounds the condensation pipe through the first fins and the second fins and makes full contact with the condensation pipe, the condensation efficiency is high, a heat preservation layer is further arranged on the heat preservation pipe, the temperature in the condenser is evenly distributed, the stable low-temperature environment is maintained, gaseous chloroethane is fully condensed, and resources are fully utilized.

The application provides a preparation method and application of a nitrogen-doped activated carbon composite zirconium-metal organic framework material. The zirconium-metal organic framework is compounded with the nitrogen-doped activated carbon, mixed and ground, and the mixed powder is bonded into a form by using a binder to obtain a broad-spectrum adsorption material capable of carrying multiple adsorption sites and synergistically acting on various toxic and harmful gas pollutants; then, the broad-spectrum adsorption material is impregnated and loaded with ammonium bicarbonate, basic copper carbonate, basic zinc carbonate, silver nitrate, ammonium molybdate tetrahydrate and potassium hydroxide by using ammonia water; the nitrogen-doped activated carbon composite zirconium-metal organic framework material has good protection capability for benzene, chloroethane, hydrocyanic acid, cyanogen chloride, sulfur dioxide, hydrogen sulfide and ammonia gas.

The invention discloses a preparation method of an oral PCSK9 inhibitor cyclopeptide drug, and belongs to the technical field of medicinal chemistry. The preparation method comprises the following steps: sequentially coupling Fmoc amino acids or polypeptide fragments on alpha-Me-Pro-CTC resin by adopting a solid-phase synthesis method until peptide resin is obtained, then treating with a cutting liquid, adding 1, 2-dichloroethane and a Zhan catalyst 1B to carry out a ring-closure reaction, adding a Pd / C catalyst, and carrying out a hydrogenation reaction under the protection of hydrogen, so as to obtain the Fmoc peptide. And then carrying out cyclization reaction under the action of a condensing agent, and after the reaction is finished, carrying out purification treatment to obtain the oral PCSK9 inhibitor cyclopeptide medicine. A fragment synthesis strategy is adopted, the synthesis path is remarkably shortened, and the problems of low yield and difficult purification in traditional step-by-step synthesis are effectively solved; meanwhile, by optimizing reaction conditions, the reaction efficiency and selectivity are improved, the difficulty and risk of amplified production are greatly reduced, and a reliable synthesis route is provided for industrial production of a target product.

This invention provides a method for preparing green oxime ester, comprising the following steps: adding dichloroethane and m-trifluoromethylacetophenone oxime to a synthesis reactor, stirring until dissolved, then adding granular sodium hydroxide, stirring at 22℃-33℃ for 0.5h-2h, then adding potassium carbonate and tetrabutylammonium bromide, cooling, and then adding brominated oxime ether for a condensation reaction, adding water after the reaction and separating the layers, removing the lower oil phase under vacuum to remove dichloroethane, adding 90% methanol for crystallization, filtering, washing, and drying to obtain oxime ester. This invention uses dichloroethane throughout the condensation, bromination, and extraction steps, simplifying the solvent system and reducing residues and energy consumption; the combination of granular sodium hydroxide and potassium carbonate ensures efficient deprotonation and in-situ dehydration, suppressing side reactions and thus improving yield and purity; in the preparation of brominated oxime ether, n-butanol is recycled and crystallized in a controlled manner, achieving reduced consumption and safety, while saline wastewater is neutralized and recovered, effectively reducing chemical oxygen demand emissions.

The utility model discloses a reaction device for co-producing trichloroethylene and tetrachloroethylene by using a dichloroethane oxychlorination method, and relates to a trichloroethylene and tetrachloroethylene preparation device, which comprises a dichloroethane storage tank, an HCL storage bottle, an oxygen storage bottle, a tubular reactor, a heating device, a primary preheater, a gas mixer and a fused salt heat conduction sleeve, the primary preheater is connected with the gas mixer, the HCL storage bottle and the oxygen storage bottle are respectively connected with the mixing pipe section, the mixing pipe section is respectively connected with an inlet of the gas mixer and the middle part of the tubular reactor, and the gas mixer is connected with the upper end of the tubular reactor; the fused salt heat conduction sleeve is sleeved outside the tubular reactor, heat conduction fused salt is arranged in the fused salt heat conduction sleeve, and the heating device is arranged outside the fused salt heat conduction sleeve. The method has the advantages that heat release is dispersed, local reaction pressure is small, and the yield ratio of trichloroethylene to tetrachloroethylene can be rapidly adjusted according to needs.

The application discloses a method for refining magnesium-aluminum alloy crystal grains by carbon inoculation, and belongs to the technical field of magnesium alloy material processing. The method comprises the following steps: heating magnesium-aluminum alloy to 680-800 DEG C under a protective atmosphere, melting the magnesium-aluminum alloy, adding carbon inoculant hexachloroethane (C2Cl6), the adding amount being 0.1%-1.5% of the mass of the melt, adding by means of bell jar pressing, and keeping the temperature at 680-800 DEG C for 5-60 minutes, so that carbon and aluminum in the melt react in situ to generate high-density and dispersedly-distributed Al4C3 particles, which serve as effective heterogeneous nucleation cores of alpha-Mg, thereby significantly refining the crystal grains. The application is also provided with a tail gas treatment system for absorbing harmful gases such as Cl2. The method has the advantages of remarkable refining effect, strong anti-recession property, low cost, and suitability for magnesium-aluminum alloys with different aluminum contents, and solves the problems of instability, easy failure or environmental pollution in the prior art.

This invention provides a preparation process for tiamulin fumarate, belonging to the field of compound synthesis technology, comprising the following steps: truncated pleuromedullary is reacted with a bifunctional solid organic base and 2,4,6-trimethylbenzenesulfonyl chloride in a mixed solvent A to obtain a concentrated intermediate of truncated pleuromedullary trimethylbenzenesulfonate; 2-diethylaminochloroethane hydrochloride is deacidified in a fixed bed packed with a bifunctional solid organic base, reacted with sodium thiosulfate, and exchanged with tetrabutylammonium bromide to obtain 2-diethylaminoethyl Bunte salt tetrabutylammonium salt; after the reaction, the two react with fumaric acid to form a salt crystallization, yielding tiamulin fumarate. This invention can improve the reaction efficiency and selectivity of the truncated pleuromedullary sulfonation reaction, and further improve the yield and content of tiamulin fumarate.

The invention discloses a preparation method of 1, 1, 2-trifluoroethane, and belongs to the field of fluorine-containing alkane preparation. According to the method, 1, 1-difluoro-2-chloroethane and anhydrous hydrogen fluoride are used as raw materials, iron powder is creatively used as a catalyst, and the pollution problem of a traditional chromium-based catalyst is solved by optimizing reaction conditions. The method is characterized in that the iron powder catalyst is subjected to organic solvent washing, vacuum drying and reduction activation pretreatment in the hydrogen atmosphere, and the catalytic efficiency is remarkably improved. Through a system purification process and a raw material circulation mechanism, the effects that the highest conversion rate of R142 is 75.28% and the highest selectivity of R143 is 91.83% are achieved, the method has the outstanding advantages of being environmentally friendly, low in cost and easy to industrialize, and a reliable scheme is provided for clean production of 1, 1, 2-trifluoroethane.

A left stand column and a right stand column are vertically arranged on the upper surface of a bottom plate, bearing seats are arranged on the inner sides of the upper portions of the left stand column and the right stand column, a first conical barrel and a second conical barrel are arranged at the two ends of a charging barrel respectively, a feeding port is formed in the outer end of the first conical barrel, and a discharging port is formed in the outer end of the second conical barrel. The feeding port is provided with a first flange, a left protruding shaft and a right protruding shaft are arranged on the two sides of the charging barrel, the left protruding shaft is connected with a bearing in a bearing seat on the inner side of the left stand column in a matched mode, the right protruding shaft is connected with a bearing in a bearing seat on the inner side of the right stand column in a matched mode, and an output shaft of the gear motor is connected with the right protruding shaft in a matched mode. According to the utility model, the structure is reasonable, hexachloroethane which is not completely crushed can be intercepted in the conical screen drum through the screen holes of the conical screen drum, the product quality is ensured, and the charging barrel can be turned over, so that hexachloroethane balls intercepted in the conical screen drum can be conveniently poured out.

The application provides a catalyst based on ball-milling degradation residues and a preparation method and application thereof. The catalyst comprises the following steps: based on the optimal condition of removing hexachloroethane by mechanical grinding, recycling the magnetic tailings; taking natural bentonite as raw material, carrying out roasting modification, and then loading the grinding agent on the modified bentonite by a chemical precipitation method. Compared with the traditional grinding agent treatment method, the process of the application is simple, the condition is mild, and resource waste is avoided; meanwhile, the material has good removal effect on simulated wastewater and good reusability. The process of the application has wide application range, the main raw materials are all the remaining materials of mechanical grinding, other raw materials are simple to obtain, the resource waste is avoided, the pollutants in water are removed, and the application is an environmental protection and efficient resource recycling method.

The utility model discloses a hexachloroethane reation kettle convenient to wash is provided with kettle cover on the upper surface of cauldron body, and the central position of kettle cover upper surface is provided with motor through motor base, and the output shaft of motor is connected with the top end of stirring shaft through the coupling, and the lower end of stirring shaft is provided with stirring oar, and the water distribution plate is set up on the lower surface of kettle cover through bolt, and the upper surface of water distribution plate is provided with annular groove, and the lateral wall of water distribution plate is provided with a plurality of side water outlet holes, and the water distribution plate is located at annular groove and is provided with a plurality of bottom water outlet holes along the axial direction, and the upper surface of kettle cover is provided with water inlet, and the central hole of water distribution plate is provided with bearing sleeve, and the stirring shaft is arranged in bearing sleeve and cooperates with bearing sleeve, the utility model discloses reasonable structure, and the water distribution plate washes the inner wall of cauldron body and stirring oar through side water outlet hole and bottom water outlet hole respectively, and the convenience and cleaning effect greatly improve, and the stability is also higher than pipeline, and need not open hole in the inner wall of cauldron body, and reduce the processing difficulty of reation kettle.

This invention belongs to the fields of pharmaceutical chemistry and photocatalysis, and discloses a method for the photocatalytic synthesis of fulvestrant intermediates using pentafluorochloroethane and its applications. The method uses allyl ester compounds as substrates and pentafluorochloroethane (Freon-115) as a perfluoroalkylating agent. Under visible light irradiation, a specific photocatalytic redox system is constructed, and a boron-containing activator is introduced to synergistically activate the inert C-Cl bond, achieving the pentafluoroethylation-hydrogenation reaction of allyl esters to efficiently synthesize pentafluoropentyl benzoate. The method of this invention features mild reaction conditions, avoiding the use of highly toxic tin reagents in traditional processes, and simultaneously achieving high-value utilization of industrial waste gas Freon-115, demonstrating significant atom economy and promising industrial application prospects.

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthetic method of a chlorinated alcohol compound. The method comprises the following steps: adding an acetonitrile solution of a compound 1 into 1, 1, 2, 2-tetrachloroethane in a nitrogen atmosphere, then adding tert-butyl hydroperoxide, alkali and trimethylsilyl cyanide, stirring at room temperature, heating, stirring and reacting, removing a solvent under reduced pressure after the reaction is completed, and then performing silica gel column chromatography on a crude product to obtain a product, namely the chlorohydrin compound. According to the synthesis method disclosed by the invention, by regulating and controlling reaction conditions and optimizing raw material selection, the yield of the chlorinated alcohol compound is effectively improved, the atom economy is improved, the raw materials are efficiently utilized, and the emission of wastes is reduced.

The invention relates to the field of environmental microbial remediation, in particular to a compound microorganism for degrading organochlorine pollutants and application of the compound microorganism. The compound microorganism is composed of a bacillus subtilis IAE strain (Geobacter lovleyi sp.strain IAE) and a dehalogenation coccus sp. Strain (Dehalococcoides mccaryi strain BAV1), and the compound microorganism is composed of a bacillus subtilis strain (Geobacter lovleyi sp.strain IAE) and a dehalogenation coccus sp. Strain (Dehalococcoides mccaryi strain BAV1); the preservation number of the bacillus subtilis is CGMCC (China General Microbiological Culture Collection Center) No: 1.5298. Aiming at soil and underground water polluted by high-concentration 1, 1, 2-trichloroethane, the compound bacterium completely degrades 1, 1, 2-trichloroethane into non-toxic ethylene through the synergistic effect of a double dechlorination reaction and a hydrogenolysis dechlorination reaction respectively driven by an IAE strain and a BAV1 strain.

The invention discloses a method for detecting the relative sensitivity coefficient of methyl dichlorosilane impurities in chlorosilane, and belongs to the technical field of determination of methyl dichlorosilane in chlorosilane, and the method comprises the following steps: adding silicon tetrachloride into a first chromatographic sample introduction bottle, sequentially adding 1, 2-dichloroethane and methyl dichlorosilane, and uniformly mixing to obtain a mixed solution A; adding silicon tetrachloride into a second chromatographic sample injection bottle, taking a part of the mixed solution A by using a microsyringe, and uniformly mixing to obtain a mixed solution B; injecting a part of the mixed solution B into a gas chromatograph-mass spectrometer for determination, and respectively determining the ion peak areas of the methyl dichlorosilane and the 1, 2-dichloroethane to obtain the single value of the relative sensitivity coefficient of the methyl dichlorosilane and the internal standard substance 1, 2-dichloroethane; and averaging the single values of the plurality of relative sensitivity coefficients as the final relative sensitivity coefficient of the methyl dichlorosilane. The relative sensitivity coefficient detected by the method is small, the repeatability is good, and the concentration analysis accuracy of the methyl dichlorosilane can be ensured.

This invention discloses a method with a high proportion of supercage Na + This paper describes the application of exchange-site FAU molecular sieves for the adsorption and separation of fluorine-containing electron gases. The molecular sieve possesses the FAU molecular sieve configuration recognized by the International Zygotes Association (IZA), with a chemical composition molar ratio of Al₂O₃:mSiO₂:nNa₂O, where the molar ratio m of the oxide SiO₂ / Al₂O₃ ranges from 5 to 20. This molecular sieve is synthesized using an initial gel prepared from an organic template agent, water, silicon source, and aluminum source. FAU seed crystals are added, and the charge density of the organic template agent is adjusted. Different cage structures of the FAU molecular sieve are assembled. Furthermore, through mixing with a solid salt containing Na and solid-phase exchange, Na in the supercage is achieved. + Control of the exchange site ratio. Compared with the commercial molecular sieve USY2.6, this invention has a high proportion of supercage Na. + Exchange-site FAU molecular sieves can be used for the adsorption and separation of fluorine-containing electronic gases in gas-phase systems, especially pentafluorochloroethane C2F5Cl (R115) and hexafluoroethane C2F6 (R116), and the separation effect is good.