49 results about "Difluoroethyne" patented technology

The present invention relates to an environmentally friendly refrigerant blend that utilizes a refrigerant comprising E-1, 3, 3, 3-tetrafluoropropene (HFO-1234zeE), difluoromethane (HFC-32), and 1, 1-difluoroethane (HFC-152a), and more particularly, to a refrigerant blend that uses a refrigerant comprising E-1, 3, 3, 3-tetrafluoropropene (HFO-1234zeE), difluoromethane (HFC-32), and 1, the blend has low GWP, low toxicity and low flammability as well as improved efficiency for thermal management of the passenger compartment (transferring heat from a portion of the vehicle to another) of a hybrid, mild, plug-in hybrid, or all-electric vehicle to provide air conditioning (A / C) or heating to the passenger compartment.

The invention discloses a heat transfer composition as well as a preparation method and application thereof. According to the total mass of the composition, the mass ratios of the first component, trans-1, 3, 3, 3-tetrafluoropropene and difluoromethane are x%, y% and z% respectively, the first component is 2, 3, 3, 3-tetrafluoropropene and 1, 1-difluoroethane, the ratios (x, y and z) of the first component, the trans-1, 3, 3, 3-tetrafluoropropene and 1, 1-difluoroethane are located in a ternary phase diagram, the x coordinate of a point A is 23.6%, the x coordinate of a point B is 90.0%, the point coordinates on a curve section AB are (x, 70.06-0.6395 x-0. 001538 x2 and 29.94-0.3605 x + 0.001538 x2), and the coordinates of a point C are (77.6, 0 and 22.4 The GWP of the composition does not exceed 150, the flammability grade reaches A2L, and the composition is a heat transfer composition which is used for replacing propane and is low in global warming potential value, high in refrigeration / heat efficiency and low in flammability and is suitable for refrigeration / heating application.

The invention relates to the field of chemical equipment, and discloses a production device and method of 1, 1-difluoroethane. The production apparatus comprises: a reactor; a reflux tower and a first condenser, a feed inlet and a liquid phase outlet of the reflux tower are connected with the reactor, a gas phase outlet of the reflux tower is connected with the first condenser, and a gas phase outlet of the first condenser is connected with the reactor; the separation tower is connected with a liquid phase outlet of the first condenser, a liquid phase outlet of the separation tower is connected with the reactor, a gas phase outlet of the separation tower is connected with the second condenser, a gas phase outlet of the second condenser is connected with the reactor, and a liquid phase outlet of the second condenser is connected with the separation tower; and the post-treatment system is connected with the liquid phase extraction port of the separation tower. The production device can be used for separating and recycling hydrogen fluoride, reducing the content of hydrogen fluoride in the product, eliminating the consumption of fresh water and alkali liquor caused by a water alkali washing process, avoiding the generation of aqueous hydrofluoric acid with low additional value, and eliminating a heavy component removal tower.

Method of filling a pressurised dispensing container (10) with a product to be dispensed; wherein the pressurised dispensing container comprises a container (11) for the product (12) to be dispensed, and a valve fixed to the container; wherein the valve comprises a valve stem (15), a valve body and one or more seals, the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid; the valve further comprises a sealing gasket for sealing the valve to the dispensing container; and each of the one or more seals and the sealing gasket (14) comprises a polymer material comprising bromobutyl rubber; wherein the product to be dispensed comprises a propellant comprising 1,1-difluoroethane or a derivative thereof and / or 1,3,3,3-tetrafluoroprop-1-ene or a derivative thereof; and wherein the method comprises filling the container with the product to be dispensed through the valve.

The application discloses a method for preparing 1,2-difluoroethylene from 2-chloro-1,1-difluoroethane resource utilization, and the method comprises the following steps: under the action of an M-N / Y catalyst, 2-chloro-1,1-difluoroethane is subjected to a gas phase dehydrochlorination reaction to obtain 1,2-difluoroethylene, wherein M is an active component, is a fluoride and / or chloride of at least one of K, Cs, Mg, Sr or Ba; N is a metal additive, is at least one of Ru, Rh, Pd, La, Ce or Pr; and Y is a carrier, is selected from activated carbon, graphene or metal fluoride. The preparation method has the advantages of mild reaction conditions, high selectivity of target products and the like.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1-chloro-1, 1-difluoroethane (HCFC-142b) and 1, 1, 2-trifluoroethane (HFC-143), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

A pressurised dispensing container (10) comprising a container (11) for product to be dispensed, and a valve fixed to the container, wherein the container contains a propellant comprising 1,1-difluoroethane or a derivative thereof and optionally ethanol. The valve comprises a valve stem (15), a valve body (16, 18) and one or more seals (20, 21), the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid. The valve further comprises a sealing gasket (14) for sealing the valve to the dispensing container. The one or more seals (20, 21) is / are formed from (i) an elastomeric composition, preferably an elastomeric composition comprising an ethylene-propylene-diene terpolymer. The sealing gasket (14) is formed from (ii) an elastomeric composition comprising an isobutylene polymer or co-polymer thereof.

The invention belongs to the technical field of refrigerants, and particularly relates to a refrigerant for replacing R134a as well as a preparation method and application of the refrigerant. The refrigerant for replacing R134a is prepared from the following components in parts by weight: 60 to 80 parts of 1, 1, 1, 2-tetrafluoroethane and 20 to 40 parts of 1, 1-difluoroethane. As a refrigerant for replacing R134a, the refrigerant provided by the invention generally has the advantages of excellent environmental protection property, high refrigeration efficiency and good safety.

The invention belongs to the technical field of refrigerants, and particularly relates to an R134a alternative refrigerant as well as a preparation method and application thereof. The R134a alternative refrigerant is prepared from the following components in parts by weight: 1 to 5 parts of fluoroethane, 5 to 15 parts of 1, 1-difluoroethane and 80 to 94 parts of hexafluoropropylene. As an alternative refrigerant of R134a, the refrigerant has the advantages of being more environmentally friendly and safer on the whole.

The invention belongs to the technical field of refrigerants, and particularly relates to an R134a low-GWP substitute refrigerant as well as a preparation method and application of the R134a low-GWP substitute refrigerant. The alternative refrigerant is a mixture and is prepared from the following components in parts by weight: 45 to 55 parts of difluoromethane (R32), 8 to 12 parts of 1, 1-difluoroethane (R152a) and 36 to 44 parts of hexafluoropropylene (R1216). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for direct replacement of a refrigerating system, and the existing equipment does not need to be transformed.

An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.

The invention relates to the technical field of organic chemistry, in particular to triphenylsulfonium 1-[[(3-hydroxy-1-adamantyl) oxy] carbonyl]-2, 2-difluoroethane sulfonate as well as a preparation method and application of the triphenylsulfonium 1-[[(3-hydroxy-1-adamantyl) oxy] carbonyl]-2, 2-difluoroethane sulfonate. The structural formula of the triphenylsulfonium 1-[[(3-hydroxy-1-adamantyl) oxy] carbonyl]-2, 2-difluoroethane sulfonate is as shown in formula (I), and the preparation method of the triphenylsulfonium 1-[[(3-hydroxy-1-adamantyl) oxy] carbonyl]-2, 2-difluoroethane sulfonate as shown in formula (I) comprises the following steps: taking ethyl 3-bromo-2, 2-difluoropropionate and 1, 3-adamantanediol as initial reaction raw materials, and carrying out a reaction at the temperature of 60-80 DEG C for 1-2 hours; the triphenylsulfonium 1-[[(3-hydroxy-1-adamantyl) oxy] carbonyl]-2, 2-difluoroethane sulfonate shown in the formula (I) is obtained through ester exchange reaction, substitution reaction, oxidation reaction and coordination reaction. The preparation method is simple, the reaction system is green and environment-friendly, the selectivity is good, the preparation cost is low, the product yield is high, and the method is suitable for industrial production.

The invention relates to a raw material acetylene dehydration device for preparing high-purity difluoroethane, which is characterized in that an acetylene storage tank I (4) is communicated with an acetylene delivery pump (6), the acetylene delivery pump (6) is connected with a positive water seal device (1), and the positive water seal device (1) is upwards connected with an input port I (11) of an acetylene freezing dehydrator (2) through a pipeline III (9); an output port I (12) of the acetylene freezing dehydrator (2) is upwards communicated with an input port II (13) of the acetylene cryogenic dehydrator (3), an output port II (14) of the acetylene cryogenic dehydrator (3) is upwards sequentially communicated with the dryer combination and the acetylene storage tank II (15), and the acetylene storage tank II (15) is communicated with the fluorination reactor (16). According to the method, the raw material acetylene is subjected to water ring compression, freeze dehydration, cryogenic dehydration, acetylene drying and the like, so that water in the acetylene can be more effectively removed, the service life of a catalyst is prolonged, and corrosion of a fluorination reactor is reduced.

A composition comprising 1,1-difluoroethane, propane, and at least one substance selected from the group consisting of trifluoroethylene and trans-1,2-difluoroethylene, wherein the total content of 1,1-difluoroethane, propane, and trifluoroethylene or trans-1,2-difluoroethylene is 90.0 mass % or more with respect to the total amount of the composition, the global warming potential is at most 65, and the heat of combustion is at most 28.000 MJ / kg.

A process includes contacting 1,2-dichloro-1,2-difluoroethane (HCFC-132) with an activated zinc powder in the presence of a catalyst and a solvent and producing a product mixture comprising E-1,2-difluoroethylene (HFO-E-1132) and Z-1,2-difluoroethylene (HFO-Z-1132). In some embodiments, the catalyst includes tetrabutylammonium bromide. In some embodiments, the catalyst includes zinc chloride. In some embodiments, the catalyst includes zinc acetate.

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.

A pressurised dispensing container (10) comprising a container (11) for product to be dispensed, and a valve fixed to the container, wherein the container contains a propellant comprising 1,1-difluoroethane or a derivative thereof and optionally ethanol.The valve comprises a valve stem (15), a valve body (16, 18) and one or more seals (20, 21), the valve stem being slidable within the valve body, the one or more seals co-operating with the valve stem for regulating discharge of a fluid. The valve further comprises a sealing gasket (14) for sealing the valve to the dispensing container.The one or more seals (20, 21) is / are formed from (i) an elastomeric composition, preferably an elastomeric composition comprising an ethylene-propylene-diene terpolymer. The sealing gasket (14) is formed from (ii) an elastomeric composition comprising an isobutylene polymer or co-polymer thereof.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method and application of a carbon confinement magnesium fluoride catalyst. The preparation method comprises the following steps: S1, mixing a magnesium salt precursor, an amine polymer precursor and a fluorinating agent, and dropwise adding an oxidant solution while grinding to obtain composite gel coated with an amine polymer; and S2, pyrolyzing the composite gel to obtain the carbon confinement magnesium fluoride catalyst. The preparation method comprises the following steps: firstly, complexing an amine polymer precursor and a magnesium salt precursor to form a molecular-level uniformly dispersed coordination structure, and then inducing a monomer to carry out low-temperature in-situ polymerization by taking a coordination center as an active center, so that the magnesium salt precursor is wrapped by an oligomer generated by partial polymerization; and finally, the carbonization of the polymer, the decomposition of the magnesium salt and the fluorination reaction are synchronously carried out in the pyrolysis step, and the carbon confinement magnesium fluoride catalyst with excellent anti-sintering performance is finally obtained and can be applied to the dehydrofluorination reaction of 1, 1-difluoroethane (R152a).

This composition contains: trifluoroethylene or trans-1,2-difluoroethylene; difluoromethane; propane; and 1,1-difluoroethane. The composition has a global warming potential of at most 150, and a heat of combustion of at most 28.000 MJ / kg.

The application provides a refrigerant and a preparation method thereof. The refrigerant is combined by a first component, a second component and a third component, wherein the first component is 3,3,3-trifluoropropynyl, the second component is 1,1-difluoroethane, and the third component is trifluoroiodomethane or one of 2,3,3,3-tetrafluoropropene; in the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; the first preset value, the second preset value and the third preset value are greater than zero and the sum is 100 percent. The refrigerant is combined by three components, the GWP is less than 150, the ODP is 0, and the refrigerant has obvious environmental protection advantages; meanwhile, the environmental protection mixed refrigerant has similar thermal performance and unit volume refrigerating capacity to R290. Compared with R290, the safety of the mixed refrigerant is obviously improved, and the safety grade is better than that of R290.

This invention belongs to the field of refrigerant technology and discloses a mixed refrigerant and its application. The mixed refrigerant is composed of two or three of ethane, propane, propylene, and difluoroethane. When ethane is included, its mass percentage in the mixed refrigerant does not exceed 10%, or is between 21% and 50%. When difluoroethane is included, its mass percentage is between 65% and 85%. This invention, by improving the composition and proportion of each component of the mixed refrigerant, solves the technical problems of high GWP values, low energy efficiency, low volumetric refrigeration capacity, and poor refrigeration performance associated with existing refrigerants. It can be used to replace R32 or R290, has a low exhaust temperature, high volumetric refrigeration capacity, and requires less refrigerant charge, and can be used to replace high GWP refrigerants such as R32 and R410A.

The present application provides a kind of composition, preparation and its preparation method and purposes for treating skin pruritus.The composition for treating skin pruritus is composed of hydrocarbon halide and / or hydrocarbon.The hydrocarbon halide is one, two or more than three combinations of difluoromonochloromethane, difluoromethane, trifluoromonochloromethane, tetrafluoromethane, dichlorotrifluoroethane, difluoroethane, monochlorodifluoroethane, tetrafluoroethane, hexafluoroethane, chloroethane, pentafluoropropane and / or octafluoropropane.The hydrocarbon is one, two or more than three combinations of methane, ethane, propane, butane, cycloethane, cyclopropane and / or cyclobutane.The composition or preparation of the present application has excellent effects when used as a drug for treating skin pruritus, such as relieving pruritus symptoms quickly, reducing the risk of infection, shortening the course of the disease and reducing the economic burden of patients.

The invention discloses a method for simultaneously preparing vinylidene fluoride and vinyl fluoride, which comprises the following step of: reacting difluoroethane under the action of a catalyst and oxidizing gas to prepare the vinylidene fluoride and the vinyl fluoride, the catalyst comprises an active component and a carrier compound, the active component comprises an active component A, or the active component comprises an active component A and an active component B; the active component A is selected from at least one of molybdenum salt, lanthanum salt, nickel salt, chromium salt, vanadium salt, platinum salt or palladium salt; the active component B is selected from at least one of sodium salt, potassium salt, cesium salt, magnesium salt or calcium salt. According to the method, difluoroethane is taken as a raw material, and vinylidene fluoride and vinyl fluoride are prepared at the same time under the action of a catalyst and oxidizing gas.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1, 2-dichloro-1, 1, 2-trifluoroethane (HCFC-123a) and 1-chloro-1, 2-difluoroethane (HCFC-142a), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).

The invention provides a foaming agent composition, a polyurethane composition, polyurethane foam and refrigeration equipment. The foaming agent composition is prepared from the following components in parts by mass: 5 to 15 parts of trans-1, 1, 3, 4-tetrafluorobutene, 8 to 15 parts of cyclopentane, 1 to 3 parts of 1, 1-difluoroethane and 1.0 to 2.5 parts of silane modified starch. The environment-friendly property of the polyurethane foam can be improved.

The present application relates to the technical field of energy conversion medium, and specifically discloses a mixed refrigerant composition and a preparation method of the mixed refrigerant and application thereof.The mixed refrigerant composition comprises the following components: component A: 68-80 wt% of pentafluoroethane;component B: 18-30 wt% of 1,1-difluoroethane;component C: 2-10 wt% of hydrocarbon;wherein the hydrocarbon comprises propane, isobutane.The refrigerant prepared by using the composition has good refrigeration effect, can effectively replace R22 refrigerant, has low greenhouse effect, has an ODP value of 0, can avoid ozone layer destruction, is not flammable and explosive, and is high in safety during storage and use, and is particularly suitable for application in refrigeration devices such as air conditioners.

An azeotropic or azeotropic-like composition comprising an effective amount of 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1-chloro-1,2-difluoroethane (HCFC-142a). Methods for separating the azeotropic or azeotropic-like composition and / or utilizing the composition in extraction and pressure swing distillation are also disclosed in connection with a method for producing 1,1,2-trifluoroethane (HFC-143).

The mixed refrigerant composition according to embodiments of the present disclosure includes carbon dioxide (R-744), trifluoroiodomethane (R-13I1), and 1,1-difluoroethane (R-152a), wherein a sum of contents of the trifluoroiodomethane (R-13I1) and the 1,1-difluoroethane (R-152a) based on a total weight of the mixed refrigerant composition may be 60 wt. % or more and less than 100 wt. %. Accordingly, environmental pollution caused by the mixed refrigerant composition may be suppressed, and the cooling performance of the mixed refrigerant composition may be improved.

An azeotrope or azeotrope-like composition consists essentially of an effective amount of 1, 1, 2-trichloro-1, 2, 2-trifluoroethane (CFC-113) and 1-chloro-1, 2-difluoroethane (HCFC-142a), and a method for producing the azeotrope or azeotrope-like composition. Also disclosed are methods for separating azeotrope or azeotrope-like compositions and / or utilizing the same in extraction and pressure swing distillation in conjunction with methods of making 1, 1, 2-trifluoroethane (HFC-143).