33 results about "Dichloroethene" patented technology

The utility model discloses a dichloroethylene rectifying tower which comprises a tower body, one side of the tower body is fixedly connected with a liquid inlet pipe, the lower end of the tower body is fixedly connected with a liquid discharge pipe, one side of the liquid inlet pipe is fixedly connected with a connecting pipe, and one side of the connecting pipe is fixedly connected with a shunting ring pipe. A plurality of nozzles are fixedly connected to the lower end of the shunting ring pipe, a first honeycomb plate, a second honeycomb plate and a third honeycomb plate are arranged in the tower body, and a first guide plate, a second guide plate and a third guide plate are arranged in the tower body; by arranging the first honeycomb plate, the second honeycomb plate, the third honeycomb plate, the first guide plate, the second guide plate and the third guide plate, a gas phase rises through the lower part of the tower body, a liquid passes through the first honeycomb plate, the second honeycomb plate and the third honeycomb plate, and under the guide action of the first guide plate, the second guide plate and the third guide plate, the contact time of the gas phase and the liquid is long; therefore, the liquid and the gas phase can be more fully mixed.

Azeotropic or azeotrope-like compositions, particularly azeotropic or azeotrope-like compositions consisting essentially of or consisting of (Z)-1-chloro-2,3,3-trifluoroprop-1-ene (HCFO-1233yd(Z)), ethanol, and each of methanol, as well as azeotropic or azeotrope-like compositions consisting essentially of or consisting of (Z)-1-chloro-2,3,3-trifluoroprop-1-ene (HCFO-1233yd(Z)), ethanol, and 1,2-trans-dichloroethylene (trans-DCE), and azeotropic or azeotrope-like compositions consisting essentially of or consisting of (Z)-1-chloro-2,3,3-trifluoroprop-1-ene (HCFO-1233yd(Z)), methanol, and 1,2-trans-dichloroethylene (trans-DCE), and solvent uses of the aforementioned compositions.

The invention provides a low-VOC (volatile organic compound) precise instrument cleaning agent. The low-VOC precise instrument cleaning agent is prepared from trans-dichloroethylene, isopropanol, a fluorocarbon solvent, a dicarbonyl compound and organic amine, the content of the trans-dichloroethylene is not less than 50% by mass, the content of the isopropanol is not less than 1% by mass, the content of the fluorocarbon solvent is not less than 30% by mass, the content of the dicarbonyl compound is not less than 2% by mass, and the content of the organic amine is not less than 1% by mass; wherein the fluorocarbon solvent is one or more of methyl (ethyl) nonafluorobutyl ether, methyl (ethyl) nonafluoroisobutyl ether, 3-methoxy-2-trifluoromethyl octafluorobutane, perfluorotriethylamine, perfluorotripropylamine, perfluorotributylamine, a perfluoropropylene oligomer (dimer or trimer) and perfluorohexanone. The precise cleaning agent prepared through the scheme has good cleaning capacity for scaling powder and metal salt, scaling powder residues on the inner surface and the outer surface of a complex circuit are effectively removed, and an important guarantee is provided for stable production of electronic products.

The present invention relates to (i) an azeotropic or azeotrope-like composition comprising (a) cis-1,2-dichloroethylene and cis-1H,2H-octafluorocyclopentane or comprising (b) trans-1,2-dichloroethylene and trans-1H,2H-octafluorocyclopentane, (ii) a spin fluid for flash spinning comprising these azeotropic or azeotrope-like compositions and a polyolefin, and (iii) a process for the preparation of plexifilamentary fibrils of polyolefin using the spin fluid.

The cleaning method of the furnace tube comprises the steps that at the first temperature, pretreatment gas is introduced into a furnace tube to be treated, and the side wall of the furnace tube to be treated is subjected to pre-cleaning treatment; and after pre-cleaning, introducing cleaning gas containing trans-dichloroethylene into the furnace tube at a second temperature, and cleaning the side wall of the furnace tube to be treated. Before the side wall of the to-be-treated furnace tube is cleaned by adopting the cleaning gas containing trans-dichloroethylene, the interior of the to-be-treated furnace tube is pre-cleaned through the pretreatment gas, and the pre-cleaning treatment can remove part of metal ions attached to the side wall of the furnace tube and can also remove part of metal ions attached to the side wall of the furnace tube; chemical bonds between metal ions and materials of the side wall of the furnace tube can be weakened, so that the subsequent cleaning treatment effect is improved, the cleaning effect can be effectively improved, and metal ion residues are reduced.

An aqueous latex [latex (L)] of a vinylidene chloride copolymer [copolymer (A)], wherein the copolymer (A) consists essentially ofrecurring units derived from vinylidene chloride (VDC) in an amount comprised between 89.0 and 91.0 wt % of the copolymer,recurring units derived from methacrylonitrile (MAN) in an amount comprised between 2.00 and 5.50 wt % of the copolymer,recurring units derived from at least one ionic comonomer (ICO) in an amount comprised between 0.5 and 1.4 wt % of the copolymer (A), andrecurring units derived from methylmethacrylate (MMA) in an amount such that the total of recurring units of VDC, MAN, ICO and MMA is 100 wt %,and wherein the latex (L) comprises at least one surfactant [surfactant (S)] in an amount comprised between 0.09 and 1.50 wt % of the copolymer (A).Process for the manufacture of the aqueous latex (L), film made therefrom and retort pouch prepared with such film.

The invention provides a method for preparing trans-1, 2-dichloroethylene through electro-catalysis. The method is a novel process for preparing the trans-1, 2-dichloroethylene by using clean and renewable electric energy as driving force and a chlorine-containing aqueous solution as a chlorine source and by constructing an electro-catalytic reaction system at normal temperature and normal pressure, and can meet the requirements on an environment-friendly trans-1, 2-dichloroethylene preparation process at the present stage; the method has the advantages of high selectivity, high reaction efficiency and low energy consumption.

The invention discloses a high-barrier composite film, and relates to the technical field of film materials. Comprising the following raw materials: 20 to 30 parts of a functional copolymer, 40 to 60 parts of an ethylene-vinyl alcohol copolymer, 5 to 8 parts of cellulose nanocrystals, 2 to 4 parts of a compatilizer, 0.5 to 1 part of an antioxidant, 0.8 to 1.2 parts of a lubricant, 3 to 5 parts of 1-allyl-3-vinyl imidazole chlorine salt and 1 to 2 parts of allyl-beta-cyclodextrin. The functional copolymer comprises a structural unit introduced by the following monomers: vinylidene chloride, 2-acrylamido-2-methylpropanesulfonic acid, 3-(1, 1-difluoro-2-propylene-1-yl)-2 (1H)-quinoxalinone, and N-(4-cyano-3-trifluoromethylphenyl) methacrylamide. The film is good in mechanical property, good in barrier property, excellent in damp-heat aging resistance and long in service life.

Cleaning solvent blends comprising an HCFO such as l-chloro-2,3,3,- trifluoropropene; trans-dichloroethylene; and a high boiling HEE such as HFE-7300; have utility as a non-flammable, low-global warming potential, azeotrope-like cleaning solvent compositions. Additional solvent ingredients may include surfactants and co-solvents. A method for cleaning articles of soiling substances comprises contacting the articles with the solvent composition by any suitable means such as a spray delivered by a propellant gas, or by contact with liquid and / or vapor solvent compositions, as in a conventional vapor degreaser apparatus, and removing the composition from the articles.

An object of the present invention is to provide a novel azeoropic or azeotrope-like composition that is effective for the separation of HF from 1,1,2-trichloroethane (HCC-140), trans-1,2-dichloroethylene (HCO-1130(E)), or cis-1,2-dichloroethylene (HCO-1130(Z)). The object can be achieved by an azeotropic or azeotrope-like composition comprising HCC-140, HCO-1130(E), or HCO-1130(Z), and hydrogen fluoride.

A nonflammable solvent composition comprises, based on the total weight of trans-1,2-dichloroethylene, (E)-1-chloro-2,3,3-trifluoroprop-1-ene, and (Z)-1-chloro-2,3,3-trifluoroprop-1-ene: about 80 wt. % to about 99.99 wt. % of trans-1,2-dichloroethylene; and about 0.01 wt. % to about 20 wt. % of at least one of (E)-1-chloro-2,3,3-trifluoroprop-1-ene or (Z)-1-chloro-2,3,3-trifluoroprop-1-ene; wherein the nonflammable solvent composition has no fire point over a temperature range of 10° C. to the boiling point of the solvent composition, measured according to any one or more of ASTM D92-18, ASTM D1310-14, or ASTM D56-22. Methods for preparing a nonflammable solvent composition from trans-1,2-dichloroethylene and for increasing the fire point of trans-1,2-dichloroethylene comprises mixing the trans-1,2-dichloroethylene with about 0.01 wt. % to about 20 wt. % of at least one of (E)-1-chloro-2,3,3-trifluoroprop-1-ene or (Z)-1-chloro-2,3,3-trifluoroprop-1-ene to form a nonflammable solvent composition having no fire point over a temperature range of 10° C. to the boiling point of the solvent composition.

The present invention relates to (i) an azeotropic or azeotrope-like composition comprising (1) a chlorinated compound selected from the group consisting of trichloromethane, cis-1,2-dichloroethylene, and trans-1,2-dichloroethylene, and (2) a linear or branched C6 hydrocarbon, selected from the group consisting of n-hexane, 2-methylpentane, 3-methylpentane, 2,2-dimethylbutane, and 2,3-dimethylbutane, (ii) a spin fluid for flash spinning comprising these azeotropic or azeotrope-like compositions and a polymer, and (iii) a process for the preparation of plexifilamentary fibrils of polymers using the spin fluid.

The utility model discloses a system for treating calcium chloride raffinate generated in the production process of vinylidene chloride, which comprises a collecting and adjusting tank, an inlet end of which is used for introducing and collecting the raffinate after saponification reaction is finished; the inlet end of the neutralizing tank is connected with the outlet end of the collecting and adjusting tank; the inlet end of the coagulation tank is connected with the outlet end of the neutralizing tank; the inlet end of the post-coagulation wastewater temporary storage tank is connected with the liquid outlet of the coagulation tank; the inlet end of the sand filter is connected with the outlet end of the coagulated wastewater temporary storage tank, and the inlet end of the activated carbon filter is connected with the outlet end of the sand filter; the inlet end of the ultrafiltration device is connected with the outlet end of the activated carbon filter, and the outlet end of the ultrafiltration device is connected with the ultrafiltration wastewater temporary storage tank; the inlet end of the reverse osmosis device is connected with the outlet end of the ultra-filtered wastewater temporary storage tank; and the evaporating crystallizer is connected with a concentrated solution outlet of the reverse osmosis device and is used for evaporating and crystallizing.

The application discloses an ionic liquid containing a boron-containing oxygen ring and a benzene ring, a preparation method and application, and the ionic liquid is obtained by the reaction of tris(trimethylsilyl) borate, dichloroethylene, 4-p-chlorophenyl imidazoline and diisopropylamine; the ionic liquid can be used for alcoholysis of PET to obtain DMT, improve the conversion rate of DMT, and has a significant prospect in the application of PET degradation and recycling of DMT.

The invention relates to the technical field of chemical process control, and discloses a pressure SIS control system for trans-dichloroethylene synthesis, which comprises a synthesis monitoring module, a multi-source data acquisition module, a parameter adjustment module, an early warning module, a human-computer interaction interface module and a self-adaptive optimization module, the multi-source data acquisition module acquires data, the data analysis module calculates a synthesis pressure supplement coefficient, a synthesis temperature supplement coefficient and a pressure early warning value of the jth workshop section, the parameter adjustment module adjusts the pressure and temperature of the synthesis reaction according to the calculation result, and the early warning module performs real-time grading early warning according to the numerical range of the pressure early warning value. The man-machine interaction interface module displays the system operation state, key parameters and early warning information and receives an instruction of an operator to realize man-machine interaction, and the self-adaptive optimization module optimizes the system performance according to historical data and real-time monitoring data.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application of the catalytic cracking reaction composite metal catalyst in preparation of vinylidene chloride, and the preparation method of the catalytic cracking reaction composite metal catalyst comprises the following steps: (1) mixing a chitosan solution and an acetic acid solution, adjusting the pH value to obtain a mixed solution, adding the zinc lactate solution into the mixed solution, and uniformly mixing to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form slurry, performing spray granulation to form molecular sieve particles, and performing crystallization, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene for reaction to obtain a cesium oleate solution; and (4) dispersing the zinc-containing molecular sieve microspheres into a cesium oleate solution for reaction to obtain the composite metal catalyst for catalytic cracking reaction. According to the preparation process, the process conditions are optimized, and a perfect catalytic system is formed.

A nonflammable solvent composition comprises a nonflammable solvent and optionally, an additive composition. The nonflammable solvent comprises: about 90.0 wt. % to about 99.99 wt. % of trans-1,2-dichloroethylene; and about 0.01 wt. % to less than about 10.0 wt. % of one or more of (E)-1-chloro-2,3,3-trifluoroprop-1-ene and (Z)-1-chloro-2,3,3-trifluoroprop-1-ene, based on the total weight of trans-1,2-dichloroethylene, (E)-1-chloro-2,3,3-trifluoroprop-1-ene, and (Z)-1-chloro-2,3,3-trifluoroprop-1-ene. The nonflammable solvent composition has no fire point as determined by flammability testing compliant with any one or more of ASTM D92 or ASTM D1310.

The present application belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application thereof in preparation of vinylidene chloride, the preparation method of the catalytic cracking reaction composite metal catalyst comprising the following steps: (1) mixing a chitosan solution with an acetic acid solution, adjusting pH to obtain a mixed solution, and then adding a zinc lactate solution into the mixed solution and mixing uniformly to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form a slurry, forming molecular sieve particles through spray granulation, crystallizing, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene to obtain a cesium oleate solution through a mixing reaction; and (4) dispersing the zinc-containing molecular sieve microspheres into the cesium oleate solution to react, and obtaining the catalytic cracking reaction composite metal catalyst. The present application optimizes process conditions in the preparation process, and forms a perfect catalytic system.

The invention provides a method for co-producing HFO-1234yf and HFO-1234ze. The method comprises the following steps: (1) reacting dichloroethylene with trifluoromethane under the action of a first catalyst to prepare trifluorodichloropropane; (2) carrying out gas-phase dehydrochlorination reaction on the trifluorodichloropropane under the action of a second catalyst to generate trifluorochloropropene; and (3) the trifluorochloropropene and anhydrous hydrogen fluoride are subjected to a gas phase fluorination reaction under the action of a third catalyst, and HFO-1234yf and HFO-1234ze are generated. By optimizing a reaction path and a catalyst system, efficient co-production of HFO-1234yf and HFO-1234ze is realized, and the method has the advantages of mild reaction conditions, high product selectivity and the like, and is suitable for industrial production.

The invention discloses a washing and impurity-removing process and device for desorbed slurry in a vinylidene chloride polymerization production process and application of the washing and impurity-removing process and device. The slurry washing and impurity-removing process comprises the following steps: transferring desorbed slurry into a washing kettle with an overflow port, spraying cold water to the top of the washing kettle, introducing hot water into the bottom of the washing kettle, swelling resin in the slurry to remove impurities by alternately carrying out cold and hot impact washing, and overflowing the impurities out of the washing kettle along with water through the overflow port under stirring, part of the resin flows out from the bottom of the washing kettle along with water and is circularly pumped back below the liquid level of the slurry washing mixed liquid in the washing kettle through the washing circulating pump. The slurry washing and impurity removing device comprises a washing kettle with an overflow port, a cold water spraying device is arranged at the top in the washing kettle, the bottom in the washing kettle is connected with a hot water inlet pipe and a discharging pipe, the discharging pipe is connected with one end of a washing circulating pump, and the other end of the washing circulating pump is connected with the washing kettle through a return pipe. And the outlet of the material return pipe is positioned below the liquid level of slurry washing mixed liquid in the washing kettle.

An azeotrope or azeotrope-like composition, in particular an azeotrope or azeotrope-like composition consisting essentially of (Z)-1-chloro-2, 3, 3-trifluoroprop-1-ene (HCFO-1233yd (Z)) with or consisting of each of ethanol and methanol, and an azeotrope or azeotrope-like composition consisting essentially of (Z)-1-chloro-2, 3, 3-trifluoroprop-1-ene (HCFO-1233yd (Z)) with or consisting of each of ethanol and methanol. The present invention relates to an azeotrope or azeotrope-like composition consisting of or consisting of (Z)-1-chloro-2, 3, 3-trifluoroprop-1-ene (HCFO-1233yd (Z)), ethanol and trans-dichloroethylene (trans-DCE), and an azeotrope or azeotrope-like composition consisting of or consisting of substantially (Z)-1-chloro-2, 3, 3-trifluoroprop-1-ene (HCFO-1233yd (Z)), methanol and trans-dichloroethylene (trans-DCE), and to a method for producing the same. The invention also discloses solvent application of the composition.

The invention provides a process for manufacturing 1-chloro-2,2-difluoroethane (HCFC- 142) from 1,1,2-trichloroethane (HCC-140) and optionally, one or more of E / Z-1,2- dichloroethene (HCO-1130(E / Z)), E / Z-1-fluoro-2-chloroethene (HCFO-1131(E / Z)), and 1- fluoro-1,2-dichloroethane (HCFC-141). The invention also provides to a process for manufacturing a difluoroethyl derivative from HCFC-142 obtained using the process of the invention.

The utility model belongs to the technical field of waste gas treatment, and particularly relates to a membrane-method condensation recovery device for 1, 1-dichloroethylene organic waste gas. Comprising a vinyl chloride waste gas raw material pipeline, the vinyl chloride waste gas raw material pipeline is connected with a demister through a deacidification tower, the demister is connected with a buffer tank, the buffer tank is connected with a gas-liquid separation tank through a compressor, the gas-liquid separation tank is connected with a condenser through a precooler, the condenser is connected with a liquid collection tank, and the liquid collection tank is connected with the precooler through a non-condensable gas pipeline. The precooler is connected with the membrane separation system, the upstream of a membrane of the membrane separation system is connected with the oxygen cracking system, the downstream of the membrane of the membrane separation system is connected with the buffer tank, the gas-liquid separation tank is provided with a working liquid circulation pipeline, a compressor outlet pipeline is provided with a machine head outlet temperature transmitter, and the working liquid circulation pipeline is provided with a pH meter. The waste gas is firstly subjected to deacidification and demisting treatment, and the temperature of the waste gas at the outlet of the compressor is monitored, so that the risk of agglomeration of waste gas components in the device is reduced, and the liquid level in the gas-liquid separator is automatically controlled within a certain range.

The application discloses a kind of vinylidene chloride polymerization production process in the process of desalination after slurry washing and impurity removal process, device and application thereof.Slurry washing and impurity removal process includes: after desalination, slurry is transferred to washing kettle with overflow port, cold water is sprayed at the top of washing kettle, hot water is introduced at the bottom, and the resin in slurry is swelled and impurities are removed by alternating cold and hot impact washing, under stirring, impurities overflow out of washing kettle with water through overflow port, part of resin flows out of washing kettle bottom with water and is recycled back to the liquid level below slurry washing mixed solution in washing kettle through washing circulating pump.Slurry washing and impurity removal device includes washing kettle with overflow port, cold water spraying device is arranged at the top in washing kettle, hot water inlet pipe and discharge pipe are connected at the bottom in washing kettle, discharge pipe is connected with one end of washing circulating pump, the other end of washing circulating pump is connected with washing kettle through return pipe, and the outlet of return pipe is located below the liquid level of slurry washing mixed solution in washing kettle.

The invention discloses a method for continuously producing trans-dichloroethylene by using a two-phase solvent system, which comprises the following steps: contacting perfluoro-n-octane dissolved with chlorine with acetonitrile dissolved with acetylene, controlling the reaction temperature at 60-90 DEG C, and irradiating by using ultraviolet light with the wavelength of 200-400nm to initiate free radical addition reaction, so that the chlorine reacts with acetylene to generate trans-1, 3-dichloroethylene. 2, 2-dichloroethylene; the method has the advantages of simple process, mild reaction conditions, recyclable reaction solvent, high product selectivity and reaction controllability, and safe and efficient experimental operation process; the selectivity of a target product is effectively improved.

A non-combustible aerosol cleaning composition is formulated with trans-1, 2 dichloroethylene, 1, 1, 1, 2, 2, 3, 4, 5, 5, 5-decafluoropentane, 1, 1, 1, 3, 3-pentafluoropropane, HFC-134a, and carbon dioxide. The aerosol cleaning composition is formulated for deep cleaning, high pressure, and high output cleaning applications for cleaning aeronautical parts, such as jet engines located outside of about 10 feet from the user.

The present application relates to the technical field of chlorinated alkene preparation, and particularly relates to a preparation method of 1,2-dichloroethylene. The present application is characterized in that acetylene and tetrachloroethane are reacted under the action of a catalyst to generate 1,2-dichloroethylene; the catalyst comprises a metal ruthenium catalyst supported on titanium dioxide; and the loading amount of the metal ruthenium in the catalyst is 0.5-5 wt%. The present application is characterized in that acetylene and tetrachloroethane are reacted under the action of a metal ruthenium catalyst supported on titanium dioxide to generate 1,2-dichloroethylene. The reaction is simple, the raw materials are widely available and inexpensive, the production cost is low, there is no three-waste emission, the operation is safe, and the present application is a clean production process. In addition, the raw materials used in the present application are acetylene and tetrachloroethane, so the atomic economy of the reaction is also high, which is conducive to the implementation and application of the reaction in industry.

The application provides a SiC substrate and an interface state improvement method thereof, and the interface state improvement method comprises the following steps: performing vapor phase cleaning on the surface of the SiC substrate by using dichloroethylene in an oxygen-containing atmosphere; performing first annealing on the cleaned SiC substrate in a mixed atmosphere of N2 and N2O; performing oxidation treatment on the surface of the SiC substrate after the annealing treatment, so as to form a silicon oxide layer; performing second annealing on the SiC substrate after the oxidation treatment in a mixed atmosphere of N2 and N2O; and the volume ratio of N2O to N2 in the second annealing atmosphere is greater than the volume ratio of N2O to N2 in the first annealing atmosphere. By gradient design and synergistic optimization of the gas partial pressure and temperature of the annealing process before and after the oxidation, gradient and controllable doping of nitrogen atoms are realized, and then accurate control from "surface pre-passivation" to "interface depth modification" is realized, so that the interface quality of the gate oxide layer is more effectively improved, and the SiC / SiO2 interface state density is obviously reduced.

Cleaning solvent blends comprising an HCFO such as l-chloro-2,3,3,- trifluoropropene; trans-dichloroethylene; and a high boiling HEE such as HFE-7300; have utility as a non-flammable, low-global warming potential, azeotrope-like cleaning solvent compositions. Additional solvent ingredients may include surfactants and co-solvents. A method for cleaning articles of soiling substances comprises contacting the articles with the solvent composition by any suitable means such as a spray delivered by a propellant gas, or by contact with liquid and / or vapor solvent compositions, as in a conventional vapor degreaser apparatus, and removing the composition from the articles.

The present invention relates to a method for producing 1-chloro-2,2-difluoroethane (HCFC-142 or F142), by reacting gaseous 1,1,2-trichloroethane (HCC-140 or T112) and / or 1,2-dichloroethylene (HCO-1130-E or 1,2-DCE) with gaseous anhydrous hydrogen fluoride (HF), in a reactor in the presence of nanodiamonds, which is economically feasible at industrial scale and which provides high yield and selectivity.