1842 results about "Hydrogen chloride" patented technology

The invention discloses a p-methyl benzyl chloride production process and a production system thereof, p-xylene side chains and chlorine are subjected to a gas phase substitution reaction under micro negative pressure and visible light catalysis to generate crude methyl benzyl chloride and hydrogen chloride, and 99.0% methyl benzyl chloride, a small amount of benzyl dichloride and 31% hydrochloric acid are respectively generated through rectification and absorption; the device consists of four working sections of chlorination, rectification, hydrochloric acid absorption and distillation. According to the method, the defects in the prior art are overcome, on one hand, chlorine is introduced, and an aromatic ring chlorination reaction is carried out under visible light catalysis; on one hand, a supported catalyst filler is arranged at the bottom of a chlorination tower, and a zeolite molecular sieve modified by long-chain alkylsilane and supported by metal salt is used as a catalyst to catalyze chloromethylation reaction, on the other hand, the hydrophobicity of the modified catalyst is obviously enhanced, and meanwhile, the density of acidic sites is not reduced; the contact opportunity of the catalyst and a reaction substrate is greatly increased, and the catalytic efficiency of the catalyst is improved.

The invention discloses a wear-resistant and impact-resistant composite PVC material and a preparation method thereof, and belongs to the technical field of high polymer materials, the wear-resistant and impact-resistant composite PVC material comprises the following raw materials by weight: 80-100 parts of epoxy polyvinyl chloride, 10-15 parts of a plasticizing stabilizer, 10-12 parts of an impact modifier, 0.5-2 parts of a lubricant, 5-10 parts of a filler, 2-3 parts of an antioxidant and 2-3 parts of a heat stabilizer; the preparation method comprises the following steps: preparing a metal soap stabilizer, absorbing pyrolysis gas, decomposing to generate metal chloride, enhancing the flame retardant property of the material, and uniformly dispersing the metal soap stabilizer as a filler in the material, so that an epoxy group in the prepared modifier absorbs hydrogen chloride and hybridizes a polyvinyl chloride chain segment at the same time, thereby enhancing the flame retardant property of the material. And a double-bond structure reacts with pyrolysis free radicals to generate an annular structure, so that the impact resistance of the material is enhanced.

The invention relates to a method for preparing a high-concentration calcium chloride solution by using alkaline residues and ammonia distillation waste clear liquid, which comprises the following steps of: reacting a byproduct hydrogen chloride with the alkaline residues and the ammonia distillation waste clear liquid to obtain a calcium chloride solution with a certain concentration, adding calcium oxide to remove magnesium ions in the calcium chloride solution, and evaporating and concentrating by using waste heat of the ammonia distillation waste clear liquid to obtain the high-concentration calcium chloride solution. And finally, acidifying by using a byproduct hydrogen chloride to obtain a raw material for producing calcium chloride dihydrate in a calcium chloride factory. The process is simple and effective, solves the problem that the alkaline residues are easy to block in the prior art, fully utilizes the alkaline residues and the ammonia distillation waste clear liquid generated in the process of preparing alkali by an ammonia-alkali method, recycles waste heat in the ammonia distillation waste clear liquid, and improves the concentration of the calcium chloride liquid, so that the process has good practicability and economic value.

The invention provides a gallium oxide epitaxial wafer preparation method, an epitaxial growth system and a gallium oxide epitaxial wafer. The method comprises the following steps: placing a (100)-surface gallium oxide substrate in a reaction chamber, introducing a carrier gas with a first preset flow, setting the pressure in the reaction chamber to be a first preset pressure, and raising the temperature to a first preset temperature; a second preset flow of hydrogen is introduced, and the (100) surface gallium oxide substrate is pretreated; setting the pressure in the reaction chamber as a second preset pressure, raising the temperature of the source region to a second preset temperature, and raising the temperature of the growth region to a third preset temperature; and introducing hydrogen chloride with a third preset flow rate, oxygen with a fourth preset flow rate and hydrogen with a fifth preset flow rate into the reaction chamber, and carrying out vapor phase epitaxy so as to prepare the (100)-surface gallium oxide epitaxial film on the surface of the (100)-surface gallium oxide substrate. The method can promote step flow growth, reduce polycrystal particle aggregation, reduce three-dimensional island-shaped growth, and improve the surface continuity and quality of an epitaxial film.

The invention discloses a method for semi-continuously preparing electronic-grade hydrogen chloride in the field of electronic gas preparation, which comprises the following steps: (1) introducing industrial hydrogen chloride into an adsorption system after the moisture content of the industrial hydrogen chloride is lower than 50ppm by using a cryogenic system; (2) deeply removing trace moisture in the hydrogen chloride by using an adsorption system, and introducing the hydrogen chloride into a filtering system after the moisture content in the hydrogen chloride is lower than 1ppm; (3) removing the pulverized adsorbent entrained in the anhydrous hydrogen chloride gas by using a filtering system, and then introducing the anhydrous hydrogen chloride gas into a feeding tank of a rectifying tower; (4) introducing anhydrous hydrogen chloride in the feeding tank of the rectifying tower into a heavy component removal tower, removing high-boiling-point impurities from a tower kettle, and introducing a tower top material into a light component removal tower; and (5) continuously emptying the top of the light component removal tower to remove light boiling point impurities, and opening an extraction valve and filling when the purity of the tower kettle material hydrogen chloride is more than 99.9995%. According to the method, equipment corrosion is reduced, the influence of light-component impurities on the product is avoided, the product quality is stable, and the yield and the market competitiveness are improved.

The invention discloses a plastic floor base material prepared from recycled PET, and relates to the technical field of floors, the base material is prepared by mixing a recycled PET material, stone powder, a chain extender, stearic acid, an oil body and an elastomer, the recycled PET material accounts for 15%-25%, the stone powder accounts for 65%-78%, the chain extender accounts for 0.4%-1%, the stearic acid accounts for 0.5%-2%, and the oil body accounts for 1%-3%. According to the present invention, the recycled PET is adopted as the adhesive to adhere the stone powder, and extrusion molding is performed through the extruder to prepare the plastic floor base material, such that the GRS and SCS certified products can be easily obtained, the PET product cannot be decomposed into the chlorine gas and the hydrogen chloride with the pungent odor like the conventional PVC plastic floor base material, and the recovered PET material has the more sources, such that the production cost is low, and the production efficiency is high. And the market is wider.

Disclosed in the present invention is a method for co-producing 3,3,3-trifluoropropene and 2,3,3,3-tetrafluoropropene. The method comprises: introducing 1,1,1,3-tetrachloropropane, 1,1,1,2,3-pentachloropropane, and hydrogen fluoride into a first reactor, and reacting under the action of a first catalyst to obtain a first reactor reaction product; performing rectification on the first reactor reaction product to obtain a 3,3,3-trifluoropropene product and a tower kettle product, mixing the tower kettle product with hydrogen fluoride, and then introducing the mixture into a second reactor, and reacting under the action of a second catalyst to obtain a second reactor reaction product; and separating the second reactor reaction product from hydrogen chloride, water washing, alkaline washing, and drying to obtain a 2,3,3,3-tetrafluoropropene product. The present invention has the advantages of simple process, high efficiency, flexible operation, low investment, and low energy consumption.

The invention discloses a diamond film and a preparation method and application thereof, and the preparation method comprises the steps: taking a substrate material matched with the lattice constant of a diamond film material as a substrate, and carrying out the surface treatment of the substrate; mixed reaction gas comprising 80%-95% of hydrogen, 3%-8% of methane and 2%-12% of auxiliary gas is introduced, wherein the auxiliary gas comprises at least one of argon, chlorine, hydrogen fluoride and hydrogen chloride; carrying out controlled chemical vapor deposition at 850-1000 DEG C under the pressure of not less than 21 kPa, and growing a diamond film on the surface of the substrate; and annealing the diamond film. According to the method, chemical vapor deposition is controlled through cooperation of auxiliary gas and temperature-pressure gradient, and non-corrosion high-speed growth of the high-purity monocrystal diamond film is achieved; in combination with a dynamic annealing process, lattice defects are effectively repaired, the comprehensive performance is optimized, and the reliability of the thin film serving as a heat dissipation component and other applications is remarkably improved.

The invention discloses a purification process of phosphorus trifluoride. The purification process comprises the following steps: S1, heating liquid in a first storage tank, and pumping the heated liquid into a flash evaporator for flash evaporation; s2, introducing the flashed gas into a first rectifying tower for rectification, condensing the rectified top products phosphorus trifluoride and hydrogen chloride, and introducing the condensed top products into an intermediate first product storage tank; s3, pumping the material in the middle first product storage tank into a second rectifying tower for rectification, condensing the top gas rectified by the second rectifying tower, and introducing the condensed gas into the first product storage tank for storage; s4, a finished product in the first product storage tank is pumped into a gasifier to be gasified and enters a gas-liquid separation tank to be separated, and separated gas is discharged from the top and sequentially introduced into three phosphorus trifluoride purification devices to be purified; s5, the purified gas is introduced into a filter to be filtered, the filtered gas enters a filling system to be filled after pressure stabilization, impurities in phosphorus trifluoride can be completely removed, and the purity of phosphorus trifluoride is improved in a jumping mode.

The invention belongs to the technical field of high-purity gas preparation and catalysis, and discloses a copper-iron double-component composite catalyst for removing trace acetylene and ethylene in petrochemical byproduct hydrogen chloride gas to prepare electronic grade hydrogen chloride gas, and a preparation method of the copper-iron double-component composite catalyst comprises the following steps: immersing activated carbon in hydrochloric acid; washing the activated carbon carrier with deionized water until the pH is neutral, and drying to obtain the pretreated activated carbon carrier; and impregnating the active component on the pretreated active carbon carrier, carrying out ultrasonic-assisted impregnation, standing, and drying, thereby obtaining the product, the active components are Fe metal salt and Cu metal salt. According to the method, trace acetylene and ethylene in the petrochemical byproduct hydrogen chloride gas are catalyzed to react with the hydrogen chloride gas at the same time, so that acetylene and ethylene are removed at the same time, and the acetylene and ethylene removal step in the existing hydrogen chloride purification process is simplified. Compared with a traditional method, the reaction efficiency of preparing the electronic-grade hydrogen chloride gas is remarkably improved.

The present invention provides an ammonia removal system for a urea granulation tower, which includes a hydrogen chloride gas spray head for spraying hydrogen chloride gas below the dust removal cloth bag of the urea granulation tower. During operation, on the one hand, the hydrogen chloride gas can act as a reactant to react with ammonia mixed in the air to form ammonium chloride, and the formed ammonium chloride is intercepted by the dust removal cloth bag, thereby achieving the purpose of ammonia removal; on the other hand, the hydrogen chloride gas can act as a catalyst to cause the tiny urea particles carried in the air to react with the moisture in the air under its catalytic action to form carbon dioxide and ammonia, thereby reducing the air humidity and solving the problem of the dust removal cloth bag being blocked. This ammonia removal system can not only achieve the purpose of ammonia removal, but also reduce the air humidity to solve the problem of the dust removal cloth bag being blocked, so it can be used in combination with the dust removal cloth bag.

The invention discloses a method and equipment for preparing high-purity electronic-grade hydrogen chloride from hydrogen-rich hydrogen chloride feed gas. The bid invitation comprises the following steps: (1) removing water through a two-stage deep freezer; (2) further removing water through adsorption of an adsorption tower; (3) rectifying: directly discharging gas-phase materials at the top of the tower, namely hydrogen, carbon dioxide and other non-condensable steam, into an alkali washing section; (4) introducing the material into a light component removal tower for further rectification, directly discharging a gas-phase material at the top of the tower, namely hydrogen chloride gas containing C1 and C2, into an alkali washing section, and circulating a material at the bottom of the tower back to the light component removal tower through a dehydrogenation tower; and (5) introducing the material into a heavy component removal tower for further rectification, directly discharging hydrogen chloride liquid containing chlorine and other high-boiling-point impurities in a tower kettle into an alkali washing section, and extracting a vapor phase at the top of the tower to obtain high-purity electronic-grade hydrogen chloride. According to the method, the load of the adsorption tower is reduced, and the treatment capacity per unit time is increased; the method has the advantages of simple process, low energy consumption, high recovery rate, easiness in stable preparation of high-purity electronic-grade hydrogen chloride, and facilitation of improvement of production scale and yield.

The invention discloses a preparation method and application of a bio-based zinc adenine salt environment-friendly PVC heat stabilizer, and belongs to the field of fine chemical synthesis and plastic additive application. The nitrogen-containing organic metal heat stabilizer adenine zinc complex is prepared by taking adenine and zinc acetate as main raw materials through a one-step method. The method is simple and environment-friendly in preparation process, easily available in raw materials and suitable for industrial production. The prepared heat stabilizer zinc adenine is used as a heat stabilizer, can effectively absorb hydrogen chloride generated by PVC thermal decomposition, and can replace allyl chlorine atoms, so that the heat stability of a PVC product is improved, PVC has more excellent heat stability, and the heat stabilizer is expected to replace a traditional commercially available heat stabilizer.

The invention discloses an amino-functionalized MOFs (Metal-Organic Frameworks) composite heat stabilizer as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The amino-functionalized MOFs composite heat stabilizer is prepared from the following components in parts by weight: 100 parts of amino-functionalized protonated MOFs, 20 to 30 parts of zinc stearate and 10 to 15 parts of polyol. According to the amino-functionalized MOFs stabilizer provided by the invention, HCl generated in a PVC (Polyvinyl Chloride) processing process is adsorbed by utilizing the characteristics of large specific surface and multiple structural pores of MOFs, and-NH3 + and HCl form a hydrogen bond or are subjected to electrostatic interaction or are subjected to an ion exchange reaction to generate-NH3Cl; the inner surfaces of pore channels of the protonated MOFs are provided with positive charges or acidic groups, so that polar molecules HCl can be better and selectively adsorbed; zinc stearate reacts with HCl and is subjected to a cross-linking reaction with PVC, so that the degradation effect of HCl on PVC is inhibited; znCl2 generated in the reaction process of zinc stearate and hydrogen chloride is complexed with polyhydric alcohol, and the thermal stability of PVC is improved through the combined action of the three.

The invention discloses a high-temperature dechlorinating agent for removing hydrogen chloride gas and a preparation method of the high-temperature dechlorinating agent, and belongs to the technical field of dechlorinating, and the preparation method of the high-temperature dechlorinating agent for removing the hydrogen chloride gas comprises four steps of preparing sepiolite-loaded active calcium powder, preparing copper-aluminum coated calcium carbonate whiskers, forming and roasting. According to the high-temperature dechlorinating agent for removing the hydrogen chloride gas, the penetration chlorine capacity is 78.5 to 81.7 percent, the crushing strength is 142 to 160N. Cm <-1 >, and the abrasion rate is 0.8 to 1.2 percent.

The invention discloses an o-methylbenzyl chloride production process which comprises the following steps: S1, a chlorination section: pumping o-xylene into an evaporation kettle, heating, vaporizing the o-xylene in the kettle, enabling the vaporized o-xylene to enter a chlorination tower, introducing chlorine gas into the chlorination tower, and carrying out a chlorination reaction on the chlorine gas and rising o-xylene gas under the catalysis of visible light, the generated o-methylbenzyl chloride and o-dichlorobenzyl are in a liquid state and flow back into the evaporation kettle, the material crude benzyl in the kettle is transferred into a rectifying kettle, and hydrogen chloride gas generated by the reaction enters a hydrogen chloride absorption section. The supporting table, the feeding conveying belt, the discharging conveying belt and the rotatable transfer plate in the product tank conveying mechanism are matched with one another to form an efficient conveying system, after being placed on the feeding conveying belt, a finished product tank to be filled can be rapidly conveyed to the positions of the supporting table and the transfer plate, and through rotation of the transfer plate, the finished product tank to be filled can be rapidly conveyed to the supporting table and the transfer plate. And the finished product tanks can be accurately transferred to all stations, so that the conveying efficiency is greatly improved, and the manual carrying time and labor intensity are reduced.

The invention discloses electronic-grade amine epoxy resin and a preparation method thereof, and belongs to the field of epoxy resin preparation. Aiming at the problems of more by-products and poor performance of the existing epoxy resin preparation, the invention provides the preparation method of the electronic-grade amine epoxy resin, which comprises the following steps: synthesizing a chlorohydrin ether intermediate from p-aminophenol and epichlorohydrin; meanwhile, a catalyst is added in the ring-opening reaction stage; carrying out removal of epoxy chloropropane; alkali metal hydroxide is added for a dehydrochlorination reaction, and a target product is generated in a closed-loop manner; and washing to remove excessive alkali metal hydroxides, and reacting to generate chlorides to obtain the electronic-grade amine epoxy resin. According to the method, the ring opening speed of phenolic hydroxyl is remarkably increased through the catalyst, so that epoxy chloropropane is fully reacted, and residues are reduced; according to the method, excessive epoxy chloropropane is removed, so that side reaction of epoxy chloropropane in a ring closing stage is avoided, generation of by-products is reduced to the greatest extent, operation is simple, and high-quality epoxy resin can be generated.

The invention belongs to the technical field of chemical production, and particularly relates to a micro-channel phosphate ester production device. Comprising a micro-channel reactor, a horizontal pushing reactor and a microporous purification reactor, the micro-channel reactor comprises a reactor cylinder; a vertical micro-channel heat exchange tube is arranged in the barrel; a plurality of micro-channel reaction grooves are formed in the outer wall of the micro-channel heat exchange tube; the micro-channel reaction tank is communicated with the inner cavity of the reactor cylinder; the hydrogen chloride gas entrained with butanol generated by the invention is introduced into the microporous purification reactor to realize the separation of the hydrogen chloride gas and butanol; products and heat energy in the production process are recycled, so that the synthesis conversion rate of phosphorus oxychloride reaches 99%; meanwhile, the generation of reaction byproducts is reduced, and the purity of a main product is improved.

The invention discloses a phosphorus trifluoride production device and method, and belongs to the technical field of phosphorus trifluoride production, the device comprises a reaction part, a pretreatment part and a post-treatment part, the reaction part comprises a first raw material tank, a second raw material tank, a reaction kettle and a collection cold trap, the pretreatment part comprises a primary separation tower and an absorption tower, and the post-treatment part comprises a secondary separation tower and an absorption tower. The post-treatment part comprises an adsorption tower, a light component removal tower and a heavy component removal tower; the production method comprises the following steps: adding raw materials of phosphorus trichloride and hydrogen fluoride into a reaction kettle to generate phosphorus trifluoride and hydrogen chloride, collecting the phosphorus trifluoride and hydrogen chloride in a collecting cold trap, heating the collecting cold trap to vaporize the phosphorus trifluoride and hydrogen chloride, and sequentially entering a primary separation tower, a light component removal tower and a heavy component removal tower for a series of treatment, and finally, high-purity phosphorus trifluoride gas is extracted from the heavy component removal tower to a filling system. According to the method, high-purity phosphorus trifluoride with the purity larger than or equal to 99.999% can be finally produced, and the problem that in the prior art, the purity of phosphorus trifluoride is not enough is solved.

The invention discloses a preparation method of an oxychloride electrolyte material, the oxychloride electrolyte material and an all-solid-state battery, and the method comprises the following steps: providing raw materials; the raw materials comprise metal chloride and lithium hydroxide; and reacting the metal chloride in the raw material with lithium hydroxide in an inert gas atmosphere to obtain the oxychloride electrolyte material generated by the reaction. Lithium hydroxide is used as a lithium raw material, the price is low, the preparation cost is reduced, hydrogen chloride is generated in the mixing preparation process, an acidic catalysis environment is provided, and the preparation time is shortened; an oxygen element and a chlorine element are introduced into the prepared oxychloride electrolyte material, an oxygen-chlorine frame structure formed by the oxygen element and the chlorine element is an obvious flexible ion frame structure, and the ion frame structure reduces the diffusion activation energy of lithium ions, so that the room-temperature ion conductivity of the oxychloride electrolyte material is improved.

The invention relates to the technical field of polyvinyl chloride, and discloses an anti-aging heat-resistant PVC plastic, a hyperbranched polyamide-lanthanum complex polymer contains a heat-resistant triazine ring and a rigid triphenylbenzene structure, the initial decomposition temperature of polyvinyl chloride can be increased, the triazine ring and the high-carbon-content triphenylbenzene structure form a triazine carbon-forming agent, and the aging resistance of polyvinyl chloride is improved. The mass residual rate of the polyvinyl chloride is obviously improved, and the heat resistance of the polyvinyl chloride is enhanced. The hyperbranched polyamide-lanthanum complex polymer has a lanthanum complex structure with high lanthanum content, and can react with hydrogen chloride generated by thermal decomposition of polyvinyl chloride, so that the polyvinyl chloride is prevented from being degraded by the hydrogen chloride, and the aging resistance of the polyvinyl chloride is improved.

The invention relates to the technical field of polyvinyl chloride, and discloses a wear-resistant and aging-resistant PVC (polyvinyl chloride) material.The wear-resistant and aging-resistant PVC material is characterized in that glycidyl acrylate grafted ABS is used as a compatilizer, carboxyl-terminated nitrile rubber is used as a flexibilizer and a wear-resistant modifier, and polyvinyl chloride is subjected to filling modification; the modified polyvinyl chloride can react with terminal carboxyl groups of nitrile rubber, so that nitrile rubber and polyvinyl chloride have better compatibility, and the notch impact strength and wear resistance of the PVC material are improved. The hindered phenol-lanthanum complex stabilizer contains a hindered phenol structure which can capture free radicals generated in the oxidation process, inhibit free radical chain reaction and overcome decomposition of polyvinyl chloride; meanwhile, lanthanum ions in the complex can react with hydrogen chloride generated by thermal decomposition of polyvinyl chloride, so that the phenomenon that the polyvinyl chloride is degraded by the hydrogen chloride is reduced.

The invention provides anhydrous magnesium chloride and a preparation method thereof, and the preparation method comprises the following steps: mixing MgCl2. NH2O and ammonium chloride, carrying out ball milling, tabletting and granulating the mixed material, and heating and sintering the obtained flaky particles to obtain the anhydrous magnesium chloride, wherein n is an integer, and 0 < n < = 6. The water-containing magnesium chloride and the ammonium chloride can form an alternately coated sandwich structure through the pretreatment modes of ball milling and tabletting granulation, so that hydrogen chloride gas and ammonia gas generated during heating decomposition are diffused from the inside of the flaky particles to the outside, and meanwhile, the water-containing magnesium chloride in the particles can be fully exposed in a hydrogen chloride atmosphere; mgO generated in the sintering process is reduced; according to the tabletting and granulating method, large pores can exist among the flaky particles, generated water molecules can be taken away from a heating system from the pores existing among the flaky particles along with gas circulation in the heating and sintering process, and dehydration is better achieved. Meanwhile, the method is more beneficial to model selection of dehydration equipment.

The invention discloses a distillation separation mechanism and method of a cyanate ester synthesis reaction device, and belongs to the field of cyanate ester synthesizing.The mechanism comprises a distillation assembly, a first collection assembly for collecting cyanogen chloride and hydrogen chloride, a second collection assembly for collecting bisphenol compounds and a third collection assembly for collecting cyanate ester, in the second collection assembly, a second condensation pipe is connected between a second collection cylinder and the distillation cylinder, a second condensation cylinder is sleeved on the pipe, a sliding plate in the second collection cylinder is connected with a piston rod and an insertion rod, and a tension spring is arranged between the piston rod and a piston cylinder. Pressure passes through the branch pipe to enable the piston rod to move downwards, the sliding plate to descend, the volume of the communication space to descend, boiling is slowed down, the insertion rod moves downwards to enable the second collection barrel to ascend, the condensation pipe to incline and liquid drops to flow back, and the cyanate collection amount is ensured.

The present disclosure relates to the technical field of carbon materials, and particularly relates to a preparation method for a carbonaceous material, the carbonaceous material and a use. A carbonized material formed by a biomass material is sintered at a high temperature in a chlorodifluoromethane atmosphere, and in this process, chlorodifluoromethane is decomposed to generate tetrafluoroethene and hydrogen chloride gas, tetrafluoroethylene can generate octafluorocyclobutane, and octafluorocyclobutane can react with silicon dioxide to generate silicon tetrafluoride, carbon dioxide and carbon; and the generated hydrogen chloride gas can react with metal impurities at a high temperature to generate metal chloride. By means of the preparation method provided by the present disclosure, metal impurities such as iron and calcium can be removed while silicon dioxide is removed, acid pickling and alkali washing processes are not needed, and waste liquid treatment is not involved.

The invention relates to the field of catalysts, and discloses an alumina carrier composition, an alumina carrier and a preparation method and application thereof, the alumina carrier composition contains pseudo-boehmite and fluoride, and does not contain acid with a pKa value of-16 to 4. The preparation method of the alumina carrier provided by the invention comprises the following steps: 1) performing first molding on the alumina carrier composition provided by the first aspect of the invention to obtain a first product; and (2) carrying out second forming and roasting on the first product obtained in the step (1) and a forming aid. According to the alumina carrier provided by the invention, a large amount of NOx or hydrogen chloride and other atmospheric pollutants cannot be formed in the preparation process, the alumina carrier is more environment-friendly and safer, and the side pressure strength and the specific surface area of the catalyst carrier can be increased.

The invention discloses a resourceful treatment method for mother liquor in a glycine production process. The method comprises the following steps: introducing hydrogen chloride gas into mother liquor in a glycine production process to obtain hydrolysate; centrifugally separating the hydrolysate to obtain an ammonium chloride product, and treating the primary centrifugal filtrate in the next process; adding urea into the centrifugal filtrate for reaction, and after the reaction is completed, carrying out centrifugal separation to obtain a solid product urea-formaldehyde resin and a secondary centrifugal filtrate; the secondary centrifugal filtrate is heated, methyl alcohol in the filtrate is removed, methyl chloride is recycled, then heating continues, water in the filtrate is removed, evaporation condensate water is obtained, methyl chloride can be collected to serve as a by-product to be sold, the evaporation condensate water is reused for glycine production, and evaporation residual liquid serves as organic matter fertilizer to be treated. Under the condition of low energy consumption, impurities such as urotropin, ammonium chloride and methanol ammonia in the glycine mother liquor are separated, and resources such as urotropin, ammonium chloride and methanol in the mother liquor are recycled.

The utility model relates to an environment-friendly epoxypropane production device and belongs to the field of energy-saving and environment-friendly chemical equipment. The environment-friendly epoxypropane production device is characterized in that the production device comprises a chlorohydrination reaction device and a saponification reaction device located at the downstream of the chlorohydrination reaction device; the sedimentation device is positioned at the downstream of the saponification reaction device; the waste liquid recycling device and the filtering device are respectively positioned at the downstream of the sedimentation device; the filter residue recycling device is positioned at the downstream of the filtering device, and the discharging end of the filter residue recycling device is connected with the feeding end of the chlorohydrination reaction device. The production device disclosed by the utility model not only reduces the concentration of hydrogen chloride in a liquid-phase product of a chlorohydrination reaction and the dosage of lime milk in a saponification reaction, but also remarkably reduces the amount of filter residues needing to be additionally treated, so that the production efficiency is improved, environmental friendliness is promoted, more effective cost control is realized, and the production cost is reduced. Therefore, the production cost of the epoxypropane is greatly reduced, and the economic advantage is remarkable.

The invention belongs to the technical field of organic synthesis, and particularly relates to a method for continuously synthesizing 2-chloropropane, which comprises the following steps: uniformly mixing preheated hydrogen chloride gas and vaporized isopropanol through a mixer, introducing into a fixed bed reactor filled with a solid catalyst, and contacting with the catalyst to start reaction to generate mixed gas containing 2-chloropropane; and carrying out gas-liquid separation on the mixed gas containing 2-chloropropane, and standing and layering the liquid phase to obtain the 2-chloropropane product on the upper layer. According to the method, the problem of continuous synthesis of 2-chloropropane is solved, the production efficiency is greatly improved, meanwhile, the problem that high-price special material equipment is needed in the reaction is solved, and the production cost is reduced. The problems of high reaction temperature, low selectivity and low yield are solved, the product purity of the reaction exceeds 99%, and the yield reaches more than 98.5%.

The invention discloses a fluxapyroxad preparation method, which comprises: mixing 1-methyl-3-difluoromethyl-1H-pyrazole-4-formyl chloride, a catalyst and a first organic solvent, heating to a temperature of 83-140 DEG C, adding a mixed solution composed of 3 ', 4', 5 '-trifluoro-2-aminobiphenyl and a second organic solvent, carrying out a thermal insulation reaction after the addition is completed, cooling to a room temperature, filtering, washing, and drying to obtain the fluxapyroxad. Continuously releasing hydrogen chloride in the reaction process, after the reaction is finished, adding an aqueous solution of inorganic alkali, stirring, standing, separating out a water layer, washing an organic phase with water, cooling, crystallizing, filtering and drying to obtain a fluxapyroxad product. The preparation method disclosed by the invention does not need to add an acid-binding agent, and has the advantages of high yield, less three wastes, low cost, simplicity and convenience in operation, good safety and the like.