14 results about "Octafluoropropane" patented technology

The application discloses a kind of multi-level hole carbon materials and application thereof.The multi-level hole carbon material provided by the application includes ZIF-based material by heat treatment to obtain ZIF-based derived multi-level hole carbon material, and the ZIF-based derived multi-level hole carbon material has micropore with pore size of 0.5-2nm.The ZIF-based derived multi-level hole carbon material provided by the application has good stability and developed pore structure, and has the advantages of high adsorption capacity and high adsorption separation selectivity when applied in adsorption separation of hexafluoropropylene and octafluoropropane.

The invention belongs to the technical field of octafluoropropane preparation, particularly relates to a gas quantitative mixing device for octafluoropropane preparation, and aims to solve the problems that high-density heptafluoropropane gas tends to settle at the bottom of a reaction zone and low-density fluorine gas and nitrogen gas float up to the top, so that even under the condition of forced stirring, the gas cannot be separated from the bottom of the reaction zone. In order to solve the problems that the mixing efficiency is low and the synthetic reaction efficiency of the device is reduced due to the fact that the separation trend of gas generated by density difference is far greater than that of hybrid power, the following scheme is provided: the device comprises a tool bracket, a mixing tank I is arranged on the tool bracket, and a mixing tank II is hermetically connected to an opening of the mixing tank I. The gas quantitative mixing device for preparing octafluoropropane has the effects that through layered dynamic gas inlet, reverse convection is forcibly formed, density layering is thoroughly broken, meanwhile, gas is dynamically dispersed, gas flow mass transfer is enhanced, gas disturbance is expanded, and therefore the synthetic reaction efficiency of the device is improved.

The invention relates to the technical field of raw material proportioning devices, in particular to an intelligent octafluoropropane processing raw material proportioning device which mainly comprises a feeding mechanism, the feeding mechanism comprises a feeding bottom plate, a uniform mixing tank and a PLC control box are fixedly mounted on the top surface of the feeding bottom plate, one end of the top surface of the feeding bottom plate is fixedly connected with a fixed vertical arm, and the other end of the top surface of the feeding bottom plate is fixedly connected with a movable vertical arm. A fixed shed plate is fixedly connected to the top end of the fixed vertical arm, an inclined long plate is fixedly connected to one side of the fixed shed plate, and a bearing transverse plate is fixedly connected to the top end of the inclined long plate. Through the design of the two-way filter of the replacement mechanism and the linkage control of the upper cut-off electromagnetic valve and the isolated electromagnetic valve, when one way of filter needs to be maintained, the other way of filter is switched to continue working, the raw material proportioning process does not need to be interrupted, and meanwhile, the filter adopts the isolation shell and the corrosion-resistant filter element which are in threaded connection; the self-sealing quick-connection male head and the self-sealing quick-connection female head of the shielding gas driving mechanism are combined to achieve shielding gas replacement, and it is ensured that no raw material leaks and impurities are prevented from invading in the replacement process.

The invention belongs to the technical field of gas purification equipment, particularly relates to a rectification and purification device for generating octafluoropropane, and aims to solve the problem that an existing rectification and purification device for generating octafluoropropane is poor in alkali washing effect on gas, the rectification and purification device for generating octafluoropropane comprises an alkali washing tank, a gas inlet pipe is arranged outside the alkali washing tank, and a gas outlet pipe is arranged outside the alkali washing tank. Three flow dividing pipes are arranged on the air inlet pipe, the ends, away from the air inlet pipe, of the flow dividing pipes are located in the alkali washing tank, two round holes are formed in the upper side of the alkali washing tank, and an exhaust pipe and an air conveying pipe are arranged in the round holes respectively. According to the rectification purification device for octafluoropropane generation, the alkali washing effect of the device on octafluoropropane gas can be remarkably improved, the gas is diffused in alkali liquor and flows back for secondary alkali washing, and the absorption effect of the alkali liquor on hydrogen fluoride and water in the gas is greatly improved; and the purification efficiency and effect of the device on octafluoropropane are improved.

This invention relates to a method for preparing manganese trifluoride catalyst and its application, belonging to the field of chemical technology. The method includes the following steps: S1, adding manganese powder to a reactor and preheating the reactor; S2, adding nitrogen trifluoride to the reactor and maintaining the reactor temperature until the reaction is complete; S3, the manganese powder and nitrogen trifluoride react to generate manganese trifluoride and nitrogen gas. After the reaction is complete, excess fluorine gas and the nitrogen gas produced in the reaction are removed for tail gas treatment, and the product manganese trifluoride is collected; S4, the prepared manganese trifluoride is added to an octafluoropropane synthesis reactor for use as a catalyst. This invention utilizes the decomposition of nitrogen trifluoride at a certain temperature to generate free fluoride ions, which react completely with manganese powder to generate manganese trifluoride. The reaction process is stable and can achieve continuous industrial production. The conversion rate of octafluoropropane synthesis can be effectively improved through the catalysis of manganese trifluoride.

The invention relates to a chloride ion modified beta-type iron oxyhydroxide material, a preparation method and a method for separating hexafluoropropylene / octafluoropropane mixed gas, and belongs to the technical field of fluorine special electron gas separation and purification. The preparation method comprises the following steps: dissolving chloride of iron into a mixed solvent of ethylene glycol and water to obtain an iron salt solution; adding oxalic acid into the ferric salt solution to obtain a mixed solution; and reacting the mixed solution at 100-180 DEG C for 6-24 hours to generate a precursor, heating the precursor in an inert atmosphere to 150-250 DEG C, and calcining for 1-6 hours to obtain the chloride ion modified beta-type iron oxyhydroxide material. A set amount of chloride ions are introduced into a beta-FeOOH structure, the pore size distribution of beta-FeOOH can be regulated and controlled, the pore size of beta-FeOOH can allow hexafluoropropylene with small dynamic size to enter, octafluoropropane with large dynamic size is prevented from entering, and the requirement for separating and purifying hexafluoropropylene / octafluoropropane mixed gas through an adsorption method is met.

The invention belongs to the field of medicine analysis, and provides a method for analyzing lipid-related substances, which adopts a high performance liquid reversed phase chromatography, can effectively detect the lipid-related substances in an octafluoropropane lipid microsphere injection and degraded impurities in the lipid-related substances, and is high in separation degree and good in durability.

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 belongs to the technical field of fluorine-containing fine chemical synthesis, and particularly relates to a method and device for preparing octafluoropropane through plasma cracking. The method comprises the following steps: S1, introducing nitrogen trifluoride and hexafluoropropylene into a reactor according to a flow ratio of (0.2-3.2): 1, after electrifying, cracking the nitrogen trifluoride, and reacting with the hexafluoropropylene to generate reaction products octafluoropropane and nitrogen; and S2, condensing and separating the reaction product octafluoropropane from nitrogen, and finally collecting the octafluoropropane in a liquid form. The device comprises a plasma reactor, a cold trap and an octafluoropropane storage tank which are arranged in the material flow direction, the cold trap is further communicated with a vacuum pump, and a hexafluoropropylene gas inlet is formed in the plasma reactor. According to the method, hexafluoropropylene and NF3 directly react, NF3 is cracked into free fluorine ions in a plasma reactor, and the free fluorine ions and hexafluoropropylene react to generate octafluoropropane. The reaction process is mild, and continuous production can be realized.

The invention discloses an octafluoropropane crude product automatic sample injection and impurity analysis system and a use method thereof. The system comprises a color detector, two ten-way valves, two six-way switching valves and a thermal conductivity detector, a silica gel drying column is connected to a branch between a first pneumatic valve and a second pneumatic valve, and the other end of the silica gel drying column is connected with a sample inlet pipe; the detection range of the color detector covers the whole silica gel drying column, and the color detector is linked with the pneumatic valve; the first ten-way valve is respectively connected with a second twenty-way valve and a first six-way switching valve; the first six-way switching valve is further connected with a second twenty-way valve and a second six-way switching valve. And the second six-way switching valve is connected with the thermal conductivity detector. According to the invention, HF and F2 are prevented from corroding the chromatography, automatic continuous analysis of the octafluoropropane crude product is realized, detection equipment is effectively protected, and the service life of the equipment is prolonged; the impurities in the octafluoropropane are detected in groups, so that the analysis efficiency of an analysis sample is effectively improved, the analysis time is shortened to 30 minutes, and the ppm-level content impurity detection requirement is met.

This invention discloses a quaternary ammonium salt modified molecular sieve for adsorbing and purifying the electronic gas octafluoropropane, its preparation method, and its application. The synthesis method involves adding ZSM-5 molecular sieve powder to a quaternary ammonium salt aqueous solution, stirring at a second preset temperature for a second preset time, filtering with water, and drying to obtain the quaternary ammonium salt modified molecular sieve. In this invention, a TMAZ microporous material with uniform pore size is prepared by precisely performing quaternary ammonium salt single-ion exchange on the ZSM-5 molecular sieve. This material not only exhibits a high adsorption capacity for pentachlorofluoroethane but also significantly inhibits the adsorption of octafluoropropane. This material has a high pentachlorofluoroethane / octafluoropropane separation factor, thereby enabling the adsorption and purification of trace amounts of pentachlorofluoroethane from octafluoropropane.

This invention discloses a liquid nitrogen and liquid oxygen / liquid argon coupled power generation and cryogenic technology, belonging to the fields of new energy power generation and cryogenic refrigeration. Based on the prior patent application CN202410774560.6 (a temperature difference and pressure difference coupled power generation and refrigeration technology), the working fluid and equipment are further optimized. Utilizing the different physical properties of liquid nitrogen and liquid oxygen / liquid argon in their saturated states—different pressures at the same temperature and different temperatures at the same pressure—a temperature gradient and a pressure gradient always exist. Under the action of the heat exchange coil, the two working fluids maintain a low temperature difference and a large pressure difference. Using the pressure difference potential energy, octafluoropropane liquid flows, driving a cryogenic turbine to generate electricity, while the temperature of both working fluids gradually decreases. Then, using a room temperature heat source or cryogenic waste heat, the low-pressure working fluid (liquid oxygen / liquid argon) is heated, the pressure difference reverses, and octafluoropropane flows in the opposite direction, driving an axial-flow turbine to continue generating electricity (rotation unchanged), while the medium returns, completing the cycle of power generation. Simultaneously, the liquid oxygen / liquid argon cools or condenses the external heat source, supplying cold energy to the outside world or being used for liquefied natural gas, liquefied air, etc.

This invention relates to the field of haloalkanes preparation, specifically to a method and apparatus for simultaneously preparing multiple perfluoroalkanes. The method includes the following steps: (1) thermally cracking polytetrafluoroethylene to form a pyrolysis gas containing fluoroolefins; (2) reacting the pyrolysis gas with fluorine gas to form crude perfluoroalkanes gas; (3) subjecting the crude perfluoroalkanes gas to deep catalytic fluorination under the action of a catalyst to remove fluoroolefins, followed by distillation to obtain hexafluoroethane, octafluoropropane, or hexafluoroethane, octafluoropropane, octafluorocyclobutane, and decafluorobutane, respectively. This invention achieves the preparation of high-purity perfluoroalkanes such as hexafluoroethane, octafluoropropane, octafluorocyclobutane, and decafluorobutane through pyrolysis, fluorine addition, catalytic fluorination, and distillation processes, featuring low cost, high efficiency, and suitability for industrial production.

This invention provides a method for separating hexafluoropropylene and octafluoropropane. The method comprises the following steps: using an adsorbent containing a metal-organic framework (MOF) material to adsorb and separate a mixture of hexafluoropropylene and octafluoropropane, wherein the MOF material comprises a transition metal ion, a first ligand, and a second ligand, the first ligand comprising a compound of formula I, and the second ligand comprising a tertiary amine compound having at least one 5-6 membered nitrogen aliphatic ring structure. The method of this invention can adsorb hexafluoropropylene from a mixture of hexafluoropropylene and octafluoropropane and exclude octafluoropropane, purifying octafluoropropane in an energy-saving and low-cost manner, achieving efficient adsorption and separation of hexafluoropropylene and octafluoropropane.