969 results about "Hydrogen chloride" patented technology

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 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 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 provides a preparation method of an aluminum oxide passivation layer, the aluminum oxide passivation layer and a TBC battery, and relates to the technical field of solar batteries. The preparation method of the aluminum oxide passivation layer comprises the following steps: introducing a mixed gas of chlorine dioxide, hydrogen chloride and hypochlorous acid into the silicon substrate, and carrying out first pretreatment; introducing mixed gas of hydrogen and argon, and carrying out secondary pretreatment; introducing mixed gas of nitrogen, oxygen and water vapor, and carrying out third pretreatment; and after the pretreatment is completed, depositing an aluminum oxide passivation layer on the silicon substrate. According to the preparation method, the problem that in the prior art, aluminum oxide is directly deposited on a silicon substrate after texturing, and the fitting degree of aluminum oxide and the textured surface is poor due to poor uniformity of a natural oxide layer is solved, the passivation performance of the prepared aluminum oxide passivation layer is effectively improved, and therefore the open voltage and the conversion efficiency of a TBC battery prepared from the aluminum oxide passivation layer are remarkably improved.

The present application relates to a kind of high-efficiency separation and recovery of hydrogen chloride eutectic absorbent, belong to gas separation and purification technical field.The eutectic absorbent is by quaternary ammonium salt and polyol with certain proportion compound, synthesis raw material is abundant and easy to obtain, synthesis process is simple and easy to operate, and absorbent scale preparation is safe and reliable.The anion and cation of quaternary ammonium salt in eutectic absorbent and the hydroxyl of polyol can provide multiple hydrogen bond acceptor and hydrogen bond donor, which is beneficial to the absorption of hydrogen chloride, and hydrogen chloride can be completely desorbed by heating or reducing pressure, and the regenerated absorbent can be recycled.The absorbent has low cost, small viscosity, good stability and can be recycled, and is a new type of solvent for efficient separation and recovery of hydrogen chloride, which has wide application prospect in separation and recovery of industrial tail gas containing hydrogen chloride.

The utility model relates to the technical field of hydrochloric acid desorption, in particular to a hydrochloric acid desorption device which comprises a hydrochloric acid desorption tower, and the top of the hydrochloric acid desorption tower is sequentially communicated with a primary condensing device, a secondary condensing device, a freezing device, a demister and a hydrogen chloride buffer tank; one side wall of the hydrochloric acid desorption tower is communicated with a hydrochloric acid storage tank; the side wall of the hydrochloric acid desorption tower is also communicated with a calcium chloride solution storage tank; a bottom liquid outlet of the hydrochloric acid desorption tower is communicated with a first inlet of the thermosyphon reboiler, the thermosyphon reboiler is provided with a first outlet and a second outlet, the first outlet is communicated with a liquid inlet of the hydrochloric acid desorption tower, and the second outlet is sequentially communicated with the multi-effect evaporation device and the flash separation tank; and the flash separation tank is respectively communicated with a calcium chloride solution storage tank and a second inlet of the thermosyphon type reboiler. According to the utility model, the equipment investment is reduced, the concentration efficiency of the calcium chloride solution is improved, the energy consumption is reduced, and calcium chloride is prevented from flowing back into the desorption tower to cause blockage.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing 5-methylfurfural by using 2-methylfuran. The special solid acid catalyst is used for replacing traditional phosphorus oxychloride, hydrogen chloride and phosphorus-containing wastewater are eliminated from the source, and the sulfolane is used for replacing DMF (Dimethyl Formamide), so that solvent residues in the product are reduced. The solid catalyst SO4 < 2-> is modified to form a strong Bronsted acid site (-SO3H) which cooperates with Ce < 3 + > / Ce < 4 + > redox to inhibit carbon deposition, selectively activate 2-methylfuran alpha-C and inhibit side reactions, so that the selectivity and yield of a target product are improved. Na2CO3 neutralization is replaced by electrochemical neutralization, salt slag solid waste is eliminated, and environmental pollution is reduced. After the organic phase is dried and dewatered through a molecular sieve, most of the solvent is removed through rotary evaporation, and the residual crude product is subjected to centrifugal molecular distillation, so that unreacted raw materials and trace impurities are effectively removed, and the product purity is remarkably improved.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention provides a preparation method of 2, 5-disubstituted benzyl chloride, and belongs to the technical field of preparation of drug intermediates. The chloromethyl solution is prepared from concentrated hydrochloric acid and paraformaldehyde, the concentration of hydrochloric acid is gradually reduced along with the reaction, and the reaction progress is slow due to the reduction of the concentration of concentrated hydrochloric acid; therefore, the chloromethylation reaction is carried out on the chloromethyl liquid and the disubstituted benzene in the hydrogen chloride gas, and the hydrogen chloride gas is supplemented, so that the concentration of the hydrogen chloride is increased, and the chloromethylation reaction is accelerated; meanwhile, a gradient heating mode is adopted, disubstituted benzene and chloromethyl liquid are subjected to chloromethylation reaction for 2-3 hours at the temperature of 50-60 DEG C, and the temperature is increased to 70-80 DEG C after the concentration of hydrogen chloride is reduced, so that the chloromethylation reaction is accelerated again, and the yield of the product is increased. According to the method, the volatilization and consumption of concentrated hydrochloric acid can be reduced, the generation of wastewater is reduced, the reaction time is shortened, and meanwhile, the yield of 2, 5-disubstituted benzyl chloride is also improved.

The invention discloses inorganic composite anhydrous calcium chloride and a preparation method thereof, and belongs to the technical field of chemical engineering. According to the preparation method, granular anhydrous calcium chloride is bonded to obtain a large-particle product of 20 mm by adopting an organic adhesive, so that the product has higher compactness, is not easy to decompose by moisture and hot gas, and can more smoothly settle to the lower part of a material layer to participate in reaction, and the effective conversion rate can reach 95% or above. The hydrogen chloride gas generated by decomposing calcium chloride in water is corrosive, the loss of large-particle products is small, the large-particle products are easier to settle below a material layer, and the chance of being adsorbed by a dust removal system is reduced, so that the content of chloride ions in the silica fume is remarkably reduced. The preparation method is simple and feasible in process and low in cost, large-scale industrial production is easy to realize, and various detection indexes of the prepared anhydrous calcium chloride meet the national standard.

The invention discloses a casing tubular reactor for preparing chlorine by oxidizing hydrogen chloride, which comprises a main body, and a lower seal head and an upper seal head which are respectively arranged at the bottom end and the top end of the main body, a casing reaction tube is arranged in the main body, and the casing reaction tube comprises a central tube and a jacket which is arranged on the outer wall of the central tube in a surrounding manner. A heating medium flows through the central pipe and the jacket, so that the heat exchange area is increased, and the heating medium is timely moved away from the reactor to take away heat generated by heat release of oxidation reaction, so that excessive concentration of bed reaction heat is avoided; and the obvious defect of traditional reaction equipment in the aspect of heat removal is overcome, the problems that the reaction efficiency is limited and the energy consumption is high are solved, and the reaction efficiency can be greatly improved. The invention also provides a system and a method for preparing chlorine by oxidizing hydrogen chloride, which realize recycling of reaction heat, reduction of energy consumption, recycling of tail gas discharged from an absorption tower after treatment, improvement of the utilization rate of raw materials, closed-loop operation of chlorine elements and reduction of the production cost.

The invention provides a method for growing a (310) oriented beta-Ga2O3 single crystal thick film on a sapphire substrate. The method comprises the following steps: cleaning the sapphire substrate and then carrying out annealing treatment; and with hydrogen chloride gas, gallium metal and oxygen as reaction sources, epitaxially growing a (310) oriented beta-Ga2O3 single crystal thick film on the treated sapphire substrate by using a hydride vapor phase epitaxy method. According to the method for growing the (310) oriented beta-Ga2O3 single crystal thick film on the sapphire substrate, the process is simple, operation is easy, controllability is high, the obtained (310) oriented beta-Ga2O3 single crystal thick film is smooth in surface, compact and uniform in thickness, the crystallinity of the single crystal film layer is high, and the growth requirement of a single crystal epitaxial film layer of tens of micrometers can be met; in addition, the method provided by the invention can realize large-batch and large-scale production of the (310) oriented beta-Ga2O3 single crystal thick film, and meets the device preparation requirements.

The invention discloses a preparation method of an adsorbent for dechlorination and desulfurization of blast furnace gas, which comprises the following steps: adding sodium metaaluminate into an alkaline solution to obtain an aluminum solution, adding silica sol into the alkaline solution to obtain a silicon solution, mixing the aluminum solution with the silica sol, and aging; crystallizing after aging, drying, calcining, and grinding to obtain molecular sieve powder; the molecular sieve powder is sequentially placed in a dopamine solution and a metal salt solution containing phosphoric acid to be impregnated twice, calcination is conducted after impregnation is completed, and the modified molecular sieve adsorbent is obtained. The modified molecular sieve type adsorbent prepared by the method has high carbonyl sulfide and hydrogen chloride adsorption performance.

The utility model provides a hydrogen chloride synthesis furnace waste heat recycling device, and relates to the technical field of waste heat recovery, the hydrogen chloride synthesis furnace waste heat recycling device comprises a heat exchange tank, the top of the heat exchange tank is communicated with a gas-liquid separation tank, the gas-liquid separation tank is connected with a blow-down pipe, the gas-liquid separation tank is connected with a water supplementing assembly for conveying water into the gas-liquid separation tank, one side of the heat exchange tank is provided with a water outlet, and the other side of the heat exchange tank is provided with a water outlet; the heat exchange tank is connected with a steam input assembly for inputting steam into the heat exchange tank, and by-product steam generated when the hydrogen chloride synthesis furnace is cooled is input into the heat exchange tank through the steam input assembly for heat exchange; water in the heat exchange tank is heated and then discharged to existing heat energy demand equipment for use through cooperation of the water outlet and the pipeline, heat energy waste is avoided, the production cost of an enterprise is reduced, the steam and condensate water generated in the heat exchange process can be separated through the gas-liquid separation tank, the separated steam is discharged through the blow-down pipe, and the energy-saving effect is achieved. And the condensate water falls back into the heat exchange tank under the action of gravity, so that the loss of water resources is reduced.

The invention provides a method for separating and recovering titanium, iron and vanadium from vanadium-titanium-iron concentrate, and relates to the technical field of comprehensive utilization of vanadium-titanium magnetite. Vanadium-titanium-iron concentrate obtained through mineral separation is subjected to grinding treatment and then leached through high-concentration hydrochloric acid, and acid leaching liquid containing ions such as iron and vanadium and acid leaching residues mainly containing oxides such as titanium and silicon are obtained; leaching the acid leaching residues with sodium hydroxide alkali liquor, removing SiO2 impurities in the acid leaching residues to obtain alkali leaching residues, and washing and heating the alkali leaching residues to obtain a high-purity TiO2 product; carrying out high-temperature pyrolysis on the pickle liquor to prepare superfine powder iron oxide red, and absorbing hydrogen chloride gas formed by pyrolysis by water to form hydrochloric acid for recycling; the method comprises the following steps: washing iron red with water to remove chlorine salt impurities in the iron red, leaching vanadium in the iron red by using a carbonate solution, and filtering to obtain a vanadium solution and iron leaching residues.

The invention discloses a growth method for reducing a Pit defect on a silicon carbide epitaxial surface, which comprises the following steps of: after epitaxial growth is completed, increasing the air flotation flow of a base, increasing the temperature in a reaction chamber, reducing the pressure in the reaction chamber and increasing the hydrogen flow, and entering an etching stage; hydrogen chloride gas is introduced discontinuously in the etching stage, and at least one introduction time period and an interruption time period after the introduction time period are included; the thermal instability of SiC at high temperature / low pressure is utilized, efficient decomposition is achieved through an H2 / HCl synergistic etching system, sub-damage and dislocation are reduced while the etching rate is increased, the thickness of the removed epitaxial layer can be accurately controlled, the Pit defect of the surface layer of the epitaxial layer is reduced, the crystallization quality of the epitaxial layer is kept, and the subsequent power device preparation requirement is met.

The application provides a high-chlorine solid waste treatment method and device based on pressure baking, and belongs to the field of solid waste disposal. The method is specifically as follows: high-chlorine solid waste is subjected to pressure baking at 250 DEG C to 400 DEG C, so that the high-chlorine solid waste is converted into baked coke, volatile matter and hydrogen chloride, and then the hydrogen chloride is absorbed to realize high-chlorine solid waste treatment. The application utilizes the pressure baking mode to treat high-chlorine solid waste, can realize efficient removal of chlorine at a lower temperature, and has higher dechlorination efficiency compared with atmospheric pyrolysis dechlorination, so that higher dechlorination efficiency is obtained while reducing treatment energy consumption, and is suitable for various types of high-chlorine solid waste. Meanwhile, the method can also obtain clean and high-quality baked coke, so that high-chlorine solid waste is deoxidized and upgraded, chlorine is released in the form of HCl at a lower temperature, the difficulty of subsequent chlorine removal is reduced, and reliability is enhanced.

The invention discloses a synthetic method of cocarboxylase tetrahydrate, which comprises the following steps: reacting thiamine phosphate with a condensing agent in an organic solvent to obtain an intermediate I; and reacting the intermediate I with phosphate to obtain cocarboxylase, and refining the cocarboxylase to obtain cocarboxylase tetrahydrate. According to the method disclosed by the invention, the byproduct thiamine monophosphate recovered in a traditional preparation process is used as a starting material to prepare the cocarboxylase tetrahydrate, so that the reaction selectivity is high, and the material utilization rate is increased; according to the method, the high-temperature reaction condition of the traditional process is avoided, the emission of hydrogen chloride gas is avoided, the use of organic solvents and highly toxic reagents is reduced, the pressure on environmental protection is relieved, and the reaction safety is improved.

The invention relates to a method and a system for preparing chloroethylene carbonate through continuous photochlorination. The system aims at solving the three technical problems that the mass transfer efficiency of chlorine is low under the high gas-liquid ratio, reaction balance is inhibited by accumulation of hydrogen chloride by-products, and selectivity is reduced due to excessive chlorination. The method provided by the invention comprises the following steps: dispersing chlorine into bubbles of 50 microns or below by adopting a metal sintering microbubble generator; a light source and a hollow fiber membrane separation assembly are arranged in the reactor, chlorine and ethylene carbonate are subjected to a reaction through photo-initiation to generate chloroethylene carbonate, and meanwhile generated hydrogen chloride is removed through membrane in-situ displacement by means of purging gas; the system adopts a two-section series structure, and the reaction depth is cooperatively controlled through sectional chlorine gas introduction and gradient illumination intensity. The method provided by the invention realizes efficient utilization of chlorine, real-time breaking of reaction balance and high-selectivity synthesis of monochlorinated products, and is suitable for continuous, safe and efficient industrial production of chloroethylene carbonate.

The invention provides a preparation method of diphenyl ethyoxyl phosphine and a product thereof. Taking diphenyl phosphonium chloride and absolute ethyl alcohol as raw materials, petroleum ether as a solvent and triethylamine as an acid-binding agent; the reaction process comprises the following steps: reacting diphenyl phosphine chloride with ethanol to generate diphenyl ethyoxyl phosphine and hydrogen chloride, and reacting hydrogen chloride with triethylamine to generate triethylamine hydrochloride. And after the reaction is finished, separating triethylamine hydrochloride separated by crystallization from the liquid organic phase through centrifugation, taking the obtained triethylamine hydrochloride as a co-product, carrying out desolvation treatment on the obtained liquid organic phase to obtain a diphenylethoxyphosphine crude product, and rectifying to obtain the high-quality diphenylethoxyphosphine. The preparation process provided by the invention is mild in reaction condition, simple and convenient to operate and low in requirements on equipment and energy consumption; the raw materials are wide in source and low in cost, and the solvent and the acid-binding agent can be recycled, so that the method has the advantage of environmental protection. The prepared diphenyl ethyoxyl phosphine is high in purity and good in yield, and has a wide industrial application prospect.

The present application relates to a kind of methods for preparing ultra-high purity quartz sand by deep purification, belong to high-purity quartz high-efficiency preparation and non-metallic mineral fine and deep processing technical field.The method is placed in supercritical reaction device with quartz sand raw material, and mixed fluid of composite entraining agent and supercritical carbon dioxide is introduced into the device to carry out reaction, after separation, washing and drying, high-purity quartz sand product is obtained;The composite entraining agent is the combination of acid medium and metal complexing agent;The volume fraction of the acid medium in the mixed fluid is 0.5%~5%, and the acid medium is hydrogen fluoride and / or hydrogen chloride.The method has the advantages of simple process flow, high purification efficiency, controllable purification degree and stable product performance.

The invention provides a method for preparing p-chloromethyl styrene, which comprises the following steps: (1) in the presence of a catalyst and an assistant, carrying out reaction on paraformaldehyde and hydrogen chloride to obtain a chloromethylation reagent; (2) reacting beta-halogenated ethyl benzene with the chloromethylation reagent obtained in the step (1) to obtain chloromethyl halogenated ethyl benzene; (3) adding an extracting agent into the chloromethyl halogenated ethylbenzene reaction liquid obtained in the step (2) for extraction to obtain an oil layer containing chloromethyl halogenated ethylbenzene and a water-containing acid layer, and crystallizing the oil layer to obtain purified p-chloromethyl halogenated ethylbenzene; and (4) in the presence of a solvent, carrying out elimination reaction on the purified p-chloromethyl halogenated ethyl benzene and alkali to obtain p-chloromethyl styrene.

The invention belongs to the technical field of polyvinyl chloride materials, and particularly relates to a supported co-stabilizer, a composite heat stabilizer, a PVC material and a preparation method and application thereof. According to the invention, halloysite modified by a coupling agent is used as a carrier, and MOFs are loaded to obtain the supported co-stabilizer. Wherein the interface compatibility of the modified halloysite and the MOFs is improved, so that agglomeration of the MOFs is inhibited, stress concentration is avoided, and thermal stable components are uniformly distributed; meanwhile, a rigid framework of the halloysite can be embedded among PVC molecular chains to compensate strength loss caused by the heat stabilizer, and a rigid crystal structure of the MOFs serves as an auxiliary reinforcement phase; in addition, MOFs efficiently capture hydrogen chloride generated by degradation of PVC, block conjugate discoloration, scavenge free radicals and delay aging. Under the synergistic effect of the two components, the heat stability and color stability of the further prepared PVC material are remarkably improved, and the mechanical property is powerfully guaranteed.

The invention provides a method for preparing toluene diisocynate through a phosgene method, and belongs to the technical field of toluene diisocynate preparation. According to the method, liquid phosgene is atomized into atomized phosgene through a high-pressure spraying device, the atomized phosgene is in countercurrent contact with a toluenediamine solution sprayed into a phosgenation reactor, the contact area of the atomized phosgene and the toluenediamine solution is increased, and the phosgenation reaction process is accelerated. In addition, due to the arrangement of the liquid homogenizer, the contact area between the atomized phosgene and the toluenediamine solution is increased, the reaction rate between the atomized phosgene and the toluenediamine solution is increased, and side reactions are reduced. Meanwhile, the phosgene participates in the phosgenation reaction in the form of mist droplets and is not dissolved in the solvent, so that the use of the solvent is greatly reduced, the concentration of the phosgene in the phosgenation reactor is improved, and side reactions are reduced. The liquid phosgene is subjected to high-pressure spraying treatment, so that the use of a solvent is saved, and subsequent solvent separation is facilitated. After the decomposition reaction is finished, hydrogen chloride gas and unreacted phosgene are separated in a freezing mode, phosgene recovery is achieved, and the recovery mode is simple.

The utility model provides an acetoxyacetyl chloride synthesizer which comprises a first synthesis kettle and a second synthesis kettle, the top of the first synthesis kettle and the top of the second synthesis kettle are both communicated with a first metering tank and a second metering tank through pipelines, and the first metering tank and the second metering tank are both provided with feeding pumps. The bottom of the first synthesis kettle and the bottom of the second synthesis kettle are communicated with a rectifying kettle through pipelines, a rectifying assembly is arranged at the top of the rectifying kettle, and a discharge port is formed in the bottom of the rectifying kettle; the whole device is simple in structure, the two synthesis kettles can be alternately used, so that the production efficiency is effectively improved, acidic mixed waste gases such as sulfur dioxide and hydrogen chloride are not generated, the utilization rate of raw materials theoretically reaches 100%, the device completely conforms to an environment-friendly and pollution-free green process, the reaction process is mild, and the production cost is low. The reaction speed can be controlled by controlling the temperature and the catalyst input amount, the production operation is safe, the production cost is low, and the benefit is high.

The invention relates to the technical field of preparation of hydrofluoroolefin, in particular to a method for preparing 2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: carrying out fluorination reaction on 3, 3, 3-trifluoro-2-chloropropene and excessive hydrogen fluoride under the action of a catalyst to generate a first mixture flow containing 1, 1, 1, 2, 2-pentafluoropropane (245cb), and separating the first mixture flow from the first mixture flow to obtain the 2, 3, 3, 3, 3-tetrafluoropropene. Then directly introducing the first mixture flow into a dehydrofluorination reactor for gas phase dehydrofluorination reaction to generate a second mixture flow containing 2, 3, 3, 3-tetrafluoropropene, hydrogen fluoride and unreacted raw materials, finally condensing the second mixture to remove hydrogen chloride, condensing and recycling hydrogen fluoride to obtain a third mixture flow, and rectifying the third mixture flow to obtain 2, 3, 3, 3-tetrafluoropropene. And 3, 3, 3, 3-tetrafluoropropene. According to the invention, unavoidable process wastes in the prior art are converted into recyclable reaction raw materials, the environmental protection and economic pressure of by-product treatment in the prior art is eliminated, meanwhile, the purpose of continuous flow reaction is effectively realized, and the process control difficulty and the process cost are reduced.

The invention discloses a device and a method for recovering organic matters in hydrogen chloride gas, and relates to the technical field of chemical environmental protection, the device comprises a falling film absorber and an acid storage tank, the falling film absorber adopts a vertical multi-tube-pass structure, and a tube pass is provided with a film distributor; an organic matter overflow pipe is arranged on the tank wall of the acid storage tank, the acid storage tank is communicated with the falling film absorber through a pipeline system, and a closed cooling jacket is arranged outside the tube pass of the falling film absorber; the film distributor comprises a top cover, a sealing disc and a film distribution cone, and the top cover is fixed to the top of the tube pass to form a closed cavity. The invention aims to solve the problems of hydrochloric acid product pollution, excessive tail gas VOCs (Volatile Organic Compounds), resource waste, environmental violation and the like caused by residual chlorobenzene in byproduct hydrogen chloride in the reaction of benzene and chlorine in the prior art. The device and the method have the advantages that efficient hydrogen chloride absorption and organic matter resource recovery are synchronously realized through the synergistic effect of gas-liquid mass transfer reinforcement, low-temperature stable control and continuous gravity phase splitting.

The invention relates to the technical field of catalyst preparation, and provides an ethylene oxychlorination catalyst and a preparation method thereof, and a method for preparing 1, 2-dichloroethane through ethylene oxychlorination. The gamma-Al2O3 and the Y-type molecular sieve are used as the composite carrier, so that the composite carrier has a unique pore structure, adjustable acid-base property and excellent thermal stability to resist formation of carbon deposition. Due to the unique pore structure of the composite carrier, the active components can be more uniformly distributed on the composite carrier, the agglomeration of the active components is reduced, the effective utilization rate of the active components is enhanced, and the high activity of the reaction is kept. According to the ethylene oxychlorination catalyst disclosed by the invention, gamma-Al2O3 and the Y-type molecular sieve are taken as the composite carrier, and the active component copper element is combined, so that the ethylene oxychlorination catalyst can realize oxychlorination of ethylene under normal pressure, the hydrogen chloride conversion rate is high, and the selectivity of 1, 2-dichloroethane is high.

The invention provides a preparation method of triphenylchloromethane, and belongs to the technical field of medical intermediates. The preparation method comprises the following steps: preparing a suspension from pure benzene, a composite catalyst and an adsorbent, dropwise adding carbon tetrachloride to obtain a reaction solution, heating the reaction solution to 60-80 DEG C, treating with 808nm laser while stirring, and performing post-treatment to obtain the triphenylchloromethane. The composite catalyst catalyzes pure benzene and carbon tetrachloride to react to generate triphenylchloromethane, hydrogen chloride is released, the adsorbent can adsorb hydrogen chloride in situ, and acid corrosion and catalyst poisoning can be prevented while forward proceeding of the reaction is maintained; the composite catalyst and the adsorbent are used for realizing catalysis-adsorption synergistic promotion of forward proceeding of the reaction, so that the dosage of the catalyst is reduced, the reaction time is shortened, the output of wastewater is reduced, and the reaction yield and the purity of triphenylchloromethane are improved.

The invention relates to production equipment and a production method of 1, 1, 1, 2, 3-pentachloropropane, and belongs to the technical field of preparation of chemical intermediates. According to the invention, 1, 1, 1, 3-tetrachloropropane is adopted as an initial raw material, 1, 1, 1, 2, 3-pentachloropropane is produced through dehydrochlorination and chlorination in the serial tower reactor, and compared with a traditional two-step synthesis process of 1, 1, 1, 2, 3-pentachloropropane, after dehydrochlorination of 1, 1, 1, 3-tetrachloropropane and a 1, 1, 3-trichloropropene chlorination system are coupled, the process flow is shortened; compared with the existing one-pot synthesis process, the reaction is easier to control; a fixed bed catalyst system is adopted, the problems that traditional anhydrous ferric chloride catalyst powder is not easy to add, poor in dispersity and frequent to add are solved, saponification salt-containing wastewater is not discharged, the process is green and environmentally friendly, and the application prospect is wide.