193 results about "Carbon tetrachloride" patented technology

The invention relates to a method for continuously producing 1, 1, 1, 3-tetrachloropropane, which comprises the following steps: adopting a loop reactor in which a beam pipe is arranged in the reactor, mixing reaction raw materials ethylene and carbon tetrachloride at a Venturi nozzle at the lower part of the reactor through a gas circulation loop and a liquid circulation loop outside the reactor, and spraying into the reactor filled with a main catalyst. A cocatalyst and a chelating agent are added into a carbon tetrachloride raw material in advance, are pumped into a liquid loop by a feeding pump and then enter a reactor. Reaction raw materials are circularly stirred under the action of a beam pipe in the reactor, so that solid, liquid and gas phases are fully mixed. By adopting the method disclosed by the invention, the selectivity and the production efficiency of the 1, 1, 1, 3-tetrachloropropane can be greatly improved, and the method also has the advantages of simplicity in operation, environment friendliness, long service life of the catalyst and low cost.

The invention relates to the technical field of synthesis of a polymerization inhibitor DNBP, in particular to an efficient production method of the polymerization inhibitor DNBP, which comprises the following steps: step 1, material preparation: selecting corresponding raw materials, weighing and classifying the raw materials, and dividing the raw materials into three main materials, auxiliary materials and additives, the auxiliary material comprises a sulfonic acid type ion exchange resin catalyst, the additive is an ethanol-water mixed solvent, and during weighing, weighing and proportioning are performed according to the molar ratio of nitric acid to o-tert-butylphenol being 2.15: 1 and the mass ratio of o-tert-butylphenol to carbon tetrachloride being 0.15: 1; according to the method, a gradient temperature control strategy is adopted, and a multi-stage microchannel reactor is combined, so that efficient mass and heat transfer of nitration reaction is realized, deep nitration side reaction is inhibited, the content of dinitro isomer impurities is greatly reduced, meanwhile, the total residence time can be accurately controlled, the explosion risk caused by local overheating in a traditional process is avoided, and the method is suitable for industrial production. The reaction selectivity and the safety are obviously improved.

The invention discloses porous activated carbon prepared from a balsa wood material and a preparation method and application of the porous activated carbon, the pore diameter of the porous activated carbon ranges from 0.4 nm to 400 nm, the pore volume ratio of micropores with the pore diameter being 0.4 nm to 2 nm, mesopores with the pore diameter being 2 nm to 50 nm and macropores with the pore diameter being 50 nm to 400 nm is larger than 30%, and the specific surface area of the porous activated carbon is 500 m / g to 700 m / g; the carbon tetrachloride adsorption rate is 130%-145%, and the adsorbent has excellent adsorption performance.

The invention relates to a preparation method of a hydrophobic manganese-based low-temperature denitration catalyst. According to the catalyst, a composite oxide of CeO2 and MnO2 is used as an active component, and polyacrylonitrile submicron fibers are used as a carrier; a mixed solution of carbon tetrachloride and gamma-aminopropyltriethoxysilane is used as a hydrothermal solution substrate, a mixed solution of ethyl acetate and gamma-aminopropyltriethoxysilane is used as a hydrothermal solution supernatant, and a hydrothermal-electrostatic spinning method is adopted for preparation; on the basis of the mass of the polyacrylonitrile submicron fiber carrier, the mass percentage of the active component is 10-20%, and the mass ratio of CeO2 to MnO2 in the active component is 1: (1-2). The catalyst not only can be used for catalytically reducing NO into N2 at low temperature, but also can be used for filtering particles in flue gas, has excellent water and sulfur poisoning resistance, and has relatively high economic value and wide market application prospect.

The invention discloses a preparation method of ammonium perchlorate with a hollow spherical structure, which comprises the following steps: firstly, dissolving ammonium perchlorate in a high-temperature N, N-dimethylformamide solvent to form a high-temperature ammonium perchlorate saturated solution; then, adding a high-temperature saturated ammonium perchlorate solution into a low-temperature carbon tetrachloride anti-solvent at a slow feeding rate, and recrystallizing; and finally, completely crystallizing, standing, separating, washing and drying the product to obtain the ammonium perchlorate with the hollow spherical structure. The particle size of the obtained ammonium perchlorate with the hollow spherical structure is 50-100 microns, and the ammonium perchlorate is high in sphericity degree and good in dispersity. The ammonium perchlorate with the hollow spherical structure is applied to the fields of propellants, pyrotechnic compounds, thermite and the like.

The invention provides a method for synthesizing monochloroethylene carbonate. The method provided by the invention is beneficial to improving the utilization rate of raw materials and the reaction efficiency. The method is carried out according to a first scheme or a second scheme, and the first scheme comprises the following steps: (1a) carbon tetrachloride is used as a solvent, chlorine and ethylene carbonate are subjected to a chlorination reaction, and the chlorination reaction is carried out under the condition that feed liquid in a chlorination kettle is in a boiling state; (2a) enabling a gas-phase material flow generated in the chlorination kettle to enter a rectifying tower to be in countercurrent contact with a carbon tetrachloride stream; the scheme II comprises the following steps: (1b) mixing ethylene carbonate and chlorine in a pre-reactor to carry out partial chlorination reaction; (2b) carrying out a chlorination reaction on the pre-reaction feed liquid and supplemented chlorine in a chlorination kettle in the presence of carbon tetrachloride, wherein the chlorination reaction is carried out under the condition that the feed liquid in the chlorination kettle is in a boiling state under a reduced pressure condition; and (3b) enabling a gas-phase material flow generated in the chlorination kettle to enter a rectifying tower to be in countercurrent contact with the carbon tetrachloride flow.

Disclosed in the present invention are a portable measurement device capable of accurately measuring the CTC value of activated carbon, and a measurement method thereof. The device of the present invention comprises an air drying assembly, a flow meter, an organic matter steam bubbling bottle containing carbon tetrachloride inside, an adsorption tube filled with activated carbon, an electronic balance and a computer. The air drying assembly is used for drying air and transferring same to the flow meter, the organic matter steam bubbling bottle and the adsorption tube; a first semiconductor refrigeration piece is arranged at the bottom of the organic matter steam bubbling bottle; the first semiconductor refrigeration piece is used for cooling the organic matter steam bubbling bottle to keep same at a low temperature; and the electronic balance is used for recording mass changes of the adsorption tube in real time and transmitting mass change data to the computer. The device provided by the present application can fast and efficiently measure the carbon tetrachloride adsorption rate of activated carbon, the test result having high accuracy and having an error within 5% compared with a test value obtained by means of the national standard method, thus being capable of fast reflecting the adsorption capacity of activated carbon, and having a relatively high industrial practical application value.

The invention relates to the technical field of chemical recovery, and particularly discloses a carbon tetrachloride removal system and process, the system comprises a washing tower and a carbon tetrachloride removal assembly, the washing tower is used for introducing a solvent and a phosgene material; the tower top of the washing tower is used for outputting treated substances; a tower kettle of the washing tower is communicated with the carbon tetrachloride removal assembly, and the carbon tetrachloride removal assembly is used for removing carbon tetrachloride in materials from the washing tower. The solvent is introduced into the washing tower to wash the phosgene material, and after the solvent is introduced, the washing tower is not pure phosgene equipment, so that the safety performance is improved; and compared with the prior art that carbon tetrachloride is removed by utilizing a phosgene rectifying tower and a solvent refining tower, the combination of the washing tower and the carbon tetrachloride removal assembly is beneficial to reducing the energy consumption.

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 a preparation method of 1, 1, 1, 3, 3-pentachloropropane and a catalyst, in the presence of a loaded zero-valent bimetallic nanoparticle catalyst and a cocatalyst, carbon tetrachloride and vinyl chloride are subjected to an addition reaction to obtain 1, 1, 1, 3, 3-pentachloropropane, the zero-valent bimetallic nanoparticle loaded catalyst comprises a carrier and an active component loaded on the carrier; the active component is prepared from zero-valent Pd-Fe nano particles or Cu-Fe nano particles; the cocatalyst comprises boric acid ester or acetyl citrate. The preparation method of 1, 1, 1, 3, 3-pentachloropropane can effectively avoid easy agglomeration when only Fe powder is used as a catalyst, the specific surface area of the iron powder is increased, the reaction is promoted, meanwhile, the used cocatalyst is a nitrogen-free and phosphorus-free catalyst, emission of three wastes containing nitrogen and phosphorus is avoided, and the preparation method is environment-friendly.

The present application discloses a lithium extraction agent and extraction method for lithium mother liquor. The lithium extraction agent includes a solute and an organic solvent, the solute includes at least one of 2,3,7,8-tetraaminophenazine-1,4,6,9-tetraketone and terpyridine, and the organic solvent includes at least one of dichloromethane, chloroform, carbon tetrachloride, bromobenzene, and carbon disulfide. The lithium extraction agent of the present application can be used to extract lithium in a lithium mother liquor with a wide pH range. After entering the lithium extraction agent, the lithium ions are quickly complexed with the solute in the lithium extraction agent to form a solid phase. It is only necessary to stand the extracted mixed solution A for phase separation. Lithium is present in the lithium-containing solid complex of the lower oil phase. The lower oil phase can be filtered to obtain the lithium-containing solid complex, and the residual amount of sodium in the lithium-containing solid complex is small. In addition, the extraction method of the present application can omit the washing and stripping sections of the rear end of the traditional extraction process, greatly shortening the extraction process and saving production costs.

The present invention relates to a Ru-Ni bimetallic catalyst for the selective hydrogenation of a quinoline organic hydrogen storage carrier, and a preparation method therefor and the use thereof. In the catalyst, carbon nitride is used as a carrier, and metal nanoparticles Ru and Ni serve as active components and are jointly loaded on the carbon nitride carrier; and the carbon nitride is prepared by mixing carbon tetrachloride, ethidene diamine and nano-silica, reacting same to obtain a carbon nitride polymer, then calcining same at 750-850ºC, performing a desilicification treatment, and then filtering and drying same. The catalyst provided in the present application has good catalytic hydrogenation performance in the selective hydrogenation of the quinoline organic hydrogen storage carrier and can achieve the omission of a solvent in a reaction system; the reaction is simple, green and environmentally friendly, and the gravimetric hydrogen storage density of the system can be maximally ensured when a quinoline compound is used as an organic hydrogen carrier; moreover, the catalyst also has a good cycling stability.

The invention relates to the technical field of refrigerant raw material preparation, and discloses a novel energy-saving environment-friendly refrigerant raw material preparation system which comprises a raw material preparation and supply unit, a reaction and separation unit and a refining unit which are connected in sequence, the reaction and separation unit comprises a mixer, a reflux device, a reactor, a cooling separation device, a membrane type absorption device and a tail gas tower which are connected in sequence; the refining unit comprises an azeotropic tower, a rectifying tower I and a rectifying tower II which are connected in sequence, and is used for performing dehydration, deacidification and rectifying purification on the separated crude chlorinated liquid to obtain a high-purity carbon tetrachloride product; by optimizing the technological process of the raw material preparation and supply unit, the reaction and separation unit and the refining unit, efficient, environment-friendly and energy-saving production of carbon tetrachloride is realized; the problem that the production raw material carbon tetrachloride of the fourth-generation refrigerant is insufficient is solved, the production cost is reduced, and the production efficiency is improved.

The invention discloses a metal powder injection molding process based on a thermal degreasing adhesive, and belongs to the technical field of metal powder metallurgy molding, and the metal powder injection molding process comprises the following steps: weighing raw materials, preheating and activating to obtain a premixture, melting and mixing to obtain an adhesive, extruding and granulating, obtaining feeding particles, carrying out injection molding to obtain a product green body, sintering and thermally degreasing, and cooling. A pure thermal degreasing process is adopted, dangerous chemical reagents such as nitric acid and oxalic acid do not need to be used, solvents such as n-pentane and carbon tetrachloride do not need to be depended on, in actual production, potential safety hazards in the production link can be greatly reduced, damage to the ecological environment is reduced, meanwhile, the body health of operators is guaranteed, and the production cost is reduced. The core requirements of modern industry on safe and environment-friendly production are met.

The invention provides a pharmaceutical composition for treating liver injury and hepatic fibrosis, and relates to the technical field of biological medicines. The pharmaceutical composition is prepared from a peucedanum decursum extract, a penthorum chinense pursh extract, a spanishneedles herb extract and a nux prinsepiae extract. The pharmaceutical composition shows an excellent protective effect on a carbon tetrachloride induced hepatocyte injury model. The pharmaceutical composition disclosed by the invention has obvious treatment and protection effects on carbon tetrachloride induced rat hepatic fibrosis, and the anti-hepatic fibrosis effect is realized by improving four indexes of liver function and hepatic fibrosis, reducing the level of inflammatory factors in the liver and relieving inflammatory reaction in the hepatic fibrosis process. The pharmaceutical composition disclosed by the invention is expected to be further developed and popularized as a medicine for treating liver injury and hepatic fibrosis.

The invention relates to the technical field of chemical engineering, and particularly discloses a vaporizer used in a refining process, which comprises a vaporization container for storing carbon tetrachloride; a plurality of circles of annular access holes are formed in the vaporization container in a penetrating manner; the outer surface of the vaporization container is communicated with the annular access hole and is hermetically and fixedly connected with a plurality of semicircular pipes; a plurality of semicircular pipes are sealed on the outer surface of the vaporization container and are hermetically and fixedly connected with a heat preservation cover; the vaporizing container and the semicircular pipe are communicated through the multiple circles of annular inlet and outlet holes, so that the contact area between the vaporizing container and the outside is increased, the vaporizing container can be heated more rapidly through a heat tracing band, and hot water can be injected into the heat preservation cover to heat the vaporizing container and the semicircular pipe; and the bottom of the vaporization container can be heated in a water bath heating mode, so that the heating modes are diversified, the contact area of the vaporization container is enlarged through the semicircular pipe, the heating efficiency is improved, the heating modes are multiple, and heat supply modes of different users are adapted.

The present invention provides a method for preparing a suspension-type structured flame-retardant polyether polyol and its use, belonging to the field of polymer synthesis. The method includes: at 0-10 °C, introducing a mixture of phosphite, carbon tetrachloride and anhydrous tetrahydrofuran, dropping a mixture of N-allylmethylamine, triethylamine and anhydrous tetrahydrofuran, raising the temperature to 15-30 °C, and reacting for 6-12 h to obtain allylmethylaminophosphate; at 110-130 °C, a small molecule alcohol compound, propylene oxide and allyl glycidyl ether react to obtain a polyether polyol with double bonds in the side chain; mixing allylmethylaminophosphate, an initiator, a chain transfer agent and isopropanol, and introducing them into the polyether polyol with double bonds in the side chain for reaction to obtain the flame-retardant polyether polyol. This suspension-type structured flame-retardant polyether polyol has the characteristics of a relatively high content of flame-retardant elements, high tensile strength, high tear strength and low Shore hardness, and can be widely used in the preparation of flame-retardant polyurethane products.

The invention belongs to the technical field of medicine synthesis, and particularly relates to a preparation method of a cyclobenzaprine intermediate 5H-dibenzo [a, d] cycloheptatriene-5-ketone. The preparation method comprises the following steps: preparing a magnesium Grignard reagent by taking 2-(2-chlorine or bromostyrene) benzonitrile as an initial raw material, and performing intramolecular cyclization and acidification to obtain a target compound I; the whole process is moderate in reaction temperature and mild in condition, use of expensive catalysts and special production equipment is avoided, and the production cost can be effectively reduced; meanwhile, the use of carbon tetrachloride and bromine with higher toxicity is avoided, the operation is safe, and the method is more suitable for industrial application.

The present application discloses a full-process continuous process for synthesizing 1,1,1,3,3-pentafluoropropane, including a telomerization reaction: vinyl chloride, carbon tetrachloride, catalyst 1 and a cocatalyst are added to a pre-reactor mixer for premixing to obtain mixture 1, mixture 1 is pumped into a reactor system for telomerization reaction to obtain the material of the telomerization reaction, the material of the telomerization reaction is continuously pumped out and separated to obtain R240fa, and the separated vinyl chloride, carbon tetrachloride, catalyst 1, cocatalyst and unseparated R240fa are returned to the pre-reactor mixer for continuous reaction; a fluorination reaction: the R240fa, chlorine gas and anhydrous hydrogen fluoride obtained from the telomerization reaction are continuously introduced into a fluorination reaction kettle containing activated catalyst 2 for fluorination reaction to obtain a fluorination reaction product, the fluorination reaction product is separated to obtain 1,1,1,3,3-pentafluoropropane, and the remaining product after separating 1,1,1,3,3-pentafluoropropane is returned to the fluorination reaction kettle for continuous reaction.

The application belongs to the technical field of two-dimensional material preparation, and particularly relates to a preparation method of a transition metal sulfide two-dimensional material. The preparation method provided by the application comprises the following steps: taking a transition metal sulfide as a target material, taking a polysiloxane material as a substrate, and performing physical vapor deposition to obtain a polysiloxane material-transition metal sulfide composite material; the polysiloxane material-transition metal sulfide composite material comprises a polysiloxane material and a transition metal sulfide two-dimensional material film loaded on the surface of the polysiloxane material; the polysiloxane material comprises one or more of methyl silicone oil, ethyl silicone oil and phenyl silicone oil; carbon tetrachloride is used to dissolve the polysiloxane material in the polysiloxane material-transition metal sulfide composite material to obtain the transition metal sulfide two-dimensional material. The application uses a liquid polysiloxane material as a substrate to load the transition metal sulfide, breaks through the shortcoming of small size of the two-dimensional material in the prior art, and can freely control the thickness of the two-dimensional material.

The invention belongs to the field of organic synthesis technology, and in particular to a kind of 1,1,1,3 tetrachloropropane and its synthesis method.The synthetic method comprises the following steps:Carbon coated elemental iron catalyst, co-catalyst and carbon tetrachloride are added into reactor, ethylene is passed through to reaction pressure after being warming up to reaction temperature, after heat preservation and pressure holding are reacted, tetrachloropropane crude product is obtained, tetrachloropropane crude product is filtered, and 1,1,1,3 tetrachloropropane is obtained after distillation;The preparation method of coated elemental iron catalyst is:Ferric citrate is dissolved in ethanol, stirring is uniform, precursor solution is obtained, precursor powder is dried at 50 DEG C in a vacuum drying oven, and precursor powder is carried out high temperature pyrolysis under an inert atmosphere to obtain carbon coated elemental iron catalyst.1,1,1,3 tetrachloropropane synthetic reaction of the present invention has the advantages that carbon tetrachloride conversion is high, tetrachloropropane selectivity is high, reaction time is short and by-product generation amount is few.

The invention discloses a traditional Chinese medicine preparation with a liver protection effect and a preparation method and application thereof, and belongs to the technical field of application of medicine extracts. The traditional Chinese medicine preparation is prepared from a gallnut extract, an auxiliary material and an ethanol solution, the mass ratio of the gallnut extract to the auxiliary material is 1: (1-2), and the ratio of the total mass of the gallnut extract and the auxiliary material to the mass volume of the ethanol solution is 100g: (2-5) mL. The traditional Chinese medicine preparation disclosed by the invention has the advantages that the antioxidant capacity of mice is improved, the anti-inflammatory capacity of mice is enhanced, the liver injury of the mice caused by toxicants such as acetaminophen and carbon tetrachloride is relieved, and the intestinal flora structure and liver metabolism condition of the mice are improved; when the compound is used for preparing the liver protection preparation, an antioxidant signal channel of a body can be activated, and oxidation and fibrosis damage of the liver can be relieved, so that the liver function of the body is improved.

The utility model relates to the technical field of high-voltage battery detection, and discloses a new energy automobile high-voltage battery detection safety teaching device which comprises a fire extinguishing box, a teaching detection table is fixedly installed at the top end of the fire extinguishing box, a bottom plate is fixedly installed at the bottom end of the fire extinguishing box, and a supporting mechanism is arranged between the fire extinguishing box and the teaching detection table. The supporting mechanism comprises a supporting plate and a moving block, by arranging the supporting mechanism, when accidental short circuit fire occurs in high-voltage battery teaching detection, the high-voltage battery can rapidly fall into the fire extinguishing box and be immersed into a carbon tetrachloride fire extinguishing agent to be extinguished, and the situation that the high-voltage battery explodes due to continuous combustion and discharges toxic gas is avoided; the safety of the high-voltage battery during teaching detection is improved, and the problem that when an existing high-voltage battery detection teaching device is accidentally on fire, fire extinguishing operation cannot be carried out on the high-voltage battery in time, so that explosion and toxic gas leakage possibly occur, and large potential safety hazards exist is solved.

This invention discloses a method for preparing 4-(trifluoromethylsulfinyl)pyrazole compounds, comprising: dissolving terminal alkyne in n-hexane under nitrogen atmosphere, adding anhydrous zinc chloride, and reacting trifluoromethylsulfinyl chloride to obtain α-trifluoromethylalkynyl sulfoxide; adding benzoyl chloride dropwise to a CH2Cl2 solution of phenylhydrazine and triethylamine under nitrogen atmosphere to obtain acylhydrazine; adding carbon tetrachloride to a suspension of acylhydrazine and triphenylphosphine in acetonitrile to obtain hydrazone chloride; and reacting α-trifluoromethylalkynyl sulfoxide, hydrazone chloride, potassium carbonate, and anhydrous ethanol at room temperature to obtain 4-(trifluoromethylsulfinyl)pyrazole compounds. This invention uses inexpensive and readily available raw materials, the entire reaction route is mild and simple to operate, does not require stringent reaction conditions, and most of the reaction process is carried out at room temperature. The product yield is high, and the prepared trifluoromethylalkynyl sulfoxide pyrazole structure has multiple derivatization sites, showing good application prospects.

The application discloses a synthesis method of pentachloropropane based on raw materials of vinyl chloride and carbon tetrachloride, and belongs to the technical field of new chemical materials. Main steps include raw material proportioning and pretreatment, nano-catalytic reaction, product initial extraction and purification, etc. The catalyst used is prepared by loading the composite of ferrous chloride and nano iron oxide on a mesoporous carbon carrier, and has excellent catalytic performance. The product is purified through vacuum distillation and an activated carbon adsorption column, and the purity can reach more than 99.7%. The method innovatively combines nano technology and specific reaction conditions, and has the advantages of high yield, high product purity and good catalyst stability. Compared with the traditional synthesis method, the technology significantly improves the production efficiency and reduces the energy consumption, provides an innovative and practical technical path for the industrial production of pentachloropropane, and has a wide application prospect.

The invention relates to the technical field of chemical production, and discloses a method for producing tert-dodecanethiol, which comprises the following steps: uniformly mixing dodecene and a catalyst, introducing hydrogen sulfide gas, controlling the reaction temperature to be lower than 80 DEG C, finishing the reaction when the change amplitude of the reaction temperature is less than 10 DEG C, washing and rectifying the reaction product to obtain the tert-dodecanethiol. A tert-dodecanethiol finished product is obtained; wherein the catalyst is a mixture of aluminum trichloride, carbon tetrachloride and diethyl ether. The method has the following technical effects that the mixture of aluminum trichloride, carbon tetrachloride and diethyl ether is used as the catalyst, so that the yield and purity of the tert-dodecanethiol finished product are effectively improved, the product quality is good, the performance is stable, the production process flow is simple, the raw materials are non-toxic, and the environmental pollution is small. The invention also discloses equipment for producing tert-dodecanethiol.

The utility model provides a device for converting carbon tetrachloride into methane chloride in the production of methane chloride, which can efficiently and economically convert the byproduct carbon tetrachloride and methanol steam in the production of methane chloride into methane chloride. The device comprises a primary reactor, a secondary reactor, a product condenser, a hydrochloric acid collecting tank, a hydrochloric acid pump, a pipeline mixer, a methanol feed pipe, a carbon tetrachloride feed pipe, a product condenser discharge pipe, a hydrochloric acid discharge pipe, a hydrochloric acid return pipe, a methane chloride discharge pipe and a hydrochloric acid feed pipe, an inlet of the pipeline mixer is connected with a methanol feeding pipe and a carbon tetrachloride feeding pipe, and an outlet of the pipeline mixer is connected with an inlet of the first-stage reactor; the outlet of the first-stage reactor is connected with the inlet of the second-stage reactor; an inlet of the product condenser is connected with an outlet of the secondary reactor, an outlet of the product condenser is connected with an inlet of the hydrochloric acid collecting tank through a discharge pipe of the product condenser, and a hydrochloric acid feed pipe and a hydrochloric acid return pipe are mounted on the product condenser; an outlet of the hydrochloric acid collecting tank is connected with an inlet of the hydrochloric acid pump; an outlet of the hydrochloric acid pump is connected with the hydrochloric acid return pipe; a methane chloride discharge pipe is connected with a discharge pipe of the product condenser; the hydrochloric acid discharge pipe is connected with the hydrochloric acid return pipe.

The utility model discloses a water separation device for bromine production, and belongs to the technical field of bromine production. Comprising an extraction cylinder, the lower portion of the extraction cylinder is communicated with a bromine box through a connecting pipe, the connecting pipe is provided with an electromagnetic valve, the upper portion of the extraction cylinder is provided with a circulating pump, the water inlet end of the circulating pump is connected with a water pumping pipe, and the water outlet end of the circulating pump is connected with a water outlet pipe; the tail end of the water pumping pipe is arranged at the bottom of the inner cavity of the extraction barrel; the water outlet pipe is arranged at the middle-upper part of one side of the inner cavity of the extraction barrel; the suspension sealing block can float on the upper portion of a carbon tetrachloride solvent after bromine and water are separated and settle at the bottom of water, so that when bromine is discharged, the suspension sealing block descends along with the liquid level of the bromine, and when the bromine is about to be completely discharged, the connection pipe can be sealed, and it is guaranteed that the discharged bromine is completely separated from the water. And manual control is not needed in the bromine removal process.

The invention belongs to the technical field of clean coal, and particularly relates to a coal underground gasification product collecting device and a purification and separation method.The coal underground gasification product collecting device comprises a gasification furnace, a solid separator, a tar extraction device and a negative pressure gas collecting device, and the gasification furnace is communicated with the solid separator through a pipeline; the solid separator is communicated with a tar extraction device through a high-temperature-resistant rubber hose, a negative-pressure gas collection device is arranged above the tar extraction device, the tar extraction device is further provided with an oil discharge pipeline, and the oil discharge pipeline is communicated with the tar extraction device through a corrosion-resistant hose; according to the invention, carbon tetrachloride is used as an extraction agent to separate tar to obtain pure gas, the organic solvent distillation device is used for heating and distilling the mixed liquid to gasify the carbon tetrachloride with low boiling point so as to obtain pure tar, and the gasified carbon tetrachloride flows back to the extraction device through the negative pressure gas collection device to realize recycling.

The present invention describes a method for preparing (Z)-1,1,1,4,4,4-hexafluoro-2-butene (Z-1336mzz). The method utilizes readily available halogenated raw materials, including 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) and carbon tetrachloride.