18 results about "Hexafluoroethane" patented technology

The invention relates to the technical field of electronic-grade fluorine-containing special gas synthesis, in particular to an electronic-grade hexafluoroethane directional synthesis process based on a composite catalyst, which comprises the following steps: S1, carrying out reflux treatment on activated carbon by hydrofluoric acid-nitric acid mixed liquor, sequentially loading aluminum trichloride, cesium fluoride, lanthanum oxide and graphene quantum dots, and roasting in a nitrogen atmosphere to prepare the composite catalyst; s2, mixing tetrafluoroethylene and hydrogen fluoride in proportion, dehydrating through a molecular sieve, and removing impurities through a nano-zinc oxide coating purification tower; s3, introducing the raw materials into a fixed bed with a guide plate, and carrying out segmented temperature control reaction under the adjustment of a composite catalyst and perfluorohexane; and S4, condensing, alkali-washing and drying the reaction product, and rectifying in a rectifying tower to obtain the electronic-grade hexafluoroethane. And S5, adsorbing the rectification tail gas by a composite adsorbent, and resolving and recycling the raw materials for pretreatment. The process improves the selectivity and purity of hexafluoroethane, prolongs the service life of the catalyst, is good in regeneration effect, reduces energy consumption and raw material loss, reduces wastewater discharge, and meets the requirements of the semiconductor industry.

The invention discloses a carborane hybridized cobalt cluster-based metal organic framework capable of selectively adsorbing C2HF5 from a mixture containing C2HF5 and C2F6, a preparation method of the carborane hybridized cobalt cluster-based metal organic framework and application of the carborane hybridized cobalt cluster-based metal organic framework in the aspect of hexafluoroethane purification. The carborane hybridized cobalt cluster-based metal organic framework is composed of para-carborane dicarboxylate ions, metal ions Co < 2 + >, chloride ions and organic nitrogen-containing ligands N1, N1, N3, N3, N5, N5-hexa (pyridine-4-yl) benzene-1, 3, 5-triamine, two Co < 2 + > and four oxygen atoms of two para-carborane dicarboxylate ions are bridged with one mu-Cl to form a cobalt binuclear cluster, and the cobalt binuclear cluster is used for preparing the metal organic framework. The cobalt binuclear cluster is coordinated and connected with an organic nitrogen-containing ligand to form a three-dimensional framework with a double-cage structure.

This utility model discloses a hexafluoroethane purification device, relating to the field of hexafluoroethane production technology. The vibration feeding mechanism includes a motor and a fixed rod fixedly connected to the top of a fixed platform. A transmission platform is fixedly connected to the output end of the motor, and a transmission hole is opened on the surface of the transmission platform. A limit strip is fixedly connected to the top of the fixed rod, and a connecting shaft is slidably connected to the inner wall of the limit strip. A transmission shaft is fixedly connected to the surface of the connecting shaft, and a spring rod is fixedly connected to the top of the connecting shaft. By setting up a vibration feeding mechanism, this application continuously taps the pipe during production, allowing the material to smoothly enter the production device for production. At the same time, the vibration energy causes the material adhering to the inner wall of the pipe to fall off, preventing feed blockage and ensuring production.

The invention relates to the technical field of chemical equipment, in particular to a water content adjusting device suitable for hexafluoroethane detection, which comprises an adjusting main body, a water inlet pipe, a water outlet pipe and a water outlet pipe, the liquid film adsorption module is arranged at the bottom of the adjusting cavity and comprises a liquid film driving assembly, a liquid flowing rotating disc and a liquid supply assembly, the liquid supply assembly distributes adsorption liquid to the surface of the liquid flowing rotating disc, and the adsorption liquid flows along the surface of the liquid flowing rotating disc under the action of centrifugal force generated by rotation of the liquid flowing rotating disc to form a liquid film; the two-stage drying module is arranged in the adjusting cavity and located above the liquid film adsorption module, and the two-stage drying module sequentially comprises a first drying assembly, a switching assembly and a second drying assembly from bottom to top; and the switching assembly is used for enabling the gas dried by the first drying assembly to enter the second drying assembly or be directly output. The water content adjusting device suitable for hexafluoroethane detection can adjust the treatment process according to the water content of hexafluoroethane to be treated, and the detection accuracy and adaptability are improved.

A composition comprising: (i) 1,1-difluoroethene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

The invention discloses a catalyst for cracking hexafluoroethane in crude carbon tetrafluoride gas, a preparation method of the catalyst and a carbon tetrafluoride production device and method. The catalyst comprises a carrier, active metal and a structural aid. The carrier is gamma-Al2O3, the specific surface area is 180-250 m / g, and the particle size is 3-5 mm; the active metal is one or more of nickel, copper, iron, cobalt and the like, and the loading capacity is 15-20wt%; the structural additive is selected from one of magnesium, calcium or strontium, and the loading capacity is 0.5-2.5%. The catalyst is prepared by dipping the alkaline earth metal auxiliary agent, roasting, then introducing active metal, aging, drying, reducing and carrying out fluorination activation, and is applied to deep cracking of CF4 crude gas. The purity of the cracking gas is more than 99% after the cracking gas is subjected to water washing, alkali washing and drying. The catalyst has the advantages of high activity, long service life and the like.

A composition comprising: (i) 1,1-difluoroethene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

This specification provides one or more embodiments of a high-purity hexafluoroethane production apparatus, including a main body, a reaction chamber installed outside the main body, and a separation tube for separating hexafluoroethane and hydrogen chloride, with the separation tube located inside the main body. Heating equipment is matched within the main body, and a storage chamber is provided within the reaction chamber outside the main body. The storage chamber has a mesh structure around its periphery to allow the reactants to contact the internal solid particles and to provide heating during the internal reaction. After passing through the reaction chamber and the corresponding separation chamber, the reactants can enter the separation chamber for separation processing. During separation, the pressure and water flow are controlled to ensure that the reaction product, hydrogen chloride, is completely dissolved in water, significantly improving the purity of the final product, hexafluoroethane. The entire reaction process and effect are completed within the equipment, reducing the requirements of traditional equipment processing in terms of large amounts of equipment and space, and significantly improving the purity of the product during re-separation.

Test chamber (10) for conditioning air, comprising a temperature-insulated test chamber (12) that can be closed off from the environment for receiving test material and a temperature control device (11) for temperature control of the test chamber, wherein a temperature in a temperature range of -80 °C to +180 °C can be established within the test chamber by means of the temperature control device, wherein the temperature control device comprises a cooling device (16) with a cooling circuit (17) with a refrigerant, a heat exchanger (18) arranged in the test chamber, a compressor (19), a condenser (20) and an expansion element (21), wherein the temperature control device (11) comprises a heating device (23) with a heater and a further heat exchanger (22), characterized in that the refrigerant is a nearly azeotropic refrigerant mixture consisting of a mass fraction of carbon dioxide and a mass fraction of at least one of the components ethene, hexafluoroethane, monofluoroethane, 1.1 Difluoroethene, fluoromethane and / or propane and / or xenon, wherein the refrigerant has a relative CO2 equivalent, based on 20 years, of < 2500, wherein a first bypass (43) with at least one further throttling element (44) is formed in the cooling circuit (17), wherein the first bypass (43) bridges the compressor (19) downstream of the compressor (19) and upstream of the condenser (20) in the direction of flow, wherein a pressure difference between a high-pressure side (26) and a low-pressure side (27) of the cooling circuit (17) can be equalized via the further throttling element (44).

An apparatus includes a body configured to support a substrate, a first coating, conformal on a surface of the body, that is corrosion resistant to at least one of: boron trichloride, nitrogen trifluoride, hafnium tetrachloride, aluminum trichloride, oxygen gas, chlorine gas, fluorine gas, chlorine trifluoride, hydrogen fluoride, hydrogen gas, ammonia, tungsten hexafluoride, tetrafluoromethane, titanium tetrachloride, molybdenum pentachloride, ozone, tetrafluorosilane, or hexafluoroethane, and a second coating, on the first coating, having a hardness that greater than or equal to about 8 gigapascals.

This invention discloses a method with a high proportion of supercage Na + This paper describes the application of exchange-site FAU molecular sieves for the adsorption and separation of fluorine-containing electron gases. The molecular sieve possesses the FAU molecular sieve configuration recognized by the International Zygotes Association (IZA), with a chemical composition molar ratio of Al₂O₃:mSiO₂:nNa₂O, where the molar ratio m of the oxide SiO₂ / Al₂O₃ ranges from 5 to 20. This molecular sieve is synthesized using an initial gel prepared from an organic template agent, water, silicon source, and aluminum source. FAU seed crystals are added, and the charge density of the organic template agent is adjusted. Different cage structures of the FAU molecular sieve are assembled. Furthermore, through mixing with a solid salt containing Na and solid-phase exchange, Na in the supercage is achieved. + Control of the exchange site ratio. Compared with the commercial molecular sieve USY2.6, this invention has a high proportion of supercage Na. + Exchange-site FAU molecular sieves can be used for the adsorption and separation of fluorine-containing electronic gases in gas-phase systems, especially pentafluorochloroethane C2F5Cl (R115) and hexafluoroethane C2F6 (R116), and the separation effect is good.

The invention discloses a method for removing 1, 1, 1-trifluoroethane in hexafluoroethane by an adsorption method, which comprises the following steps: S1, screening an adsorbent, and modifying the adsorbent to obtain a modified adsorbent; s2, filling an adsorption column with the modified adsorbent to form an adsorption bed layer, introducing hexafluoroethane raw material gas containing 1, 1, 1-trifluoroethane impurities from the bottom of the adsorption column at a certain air speed, selectively adsorbing the 1, 1, 1-trifluoroethane by the adsorbent in the adsorption column, and enabling the hexafluoroethane to flow out from the top of the adsorption column to realize separation of the hexafluoroethane and the 1, 1, 1-trifluoroethane, the high-purity hexafluoroethane is obtained. According to the method, the proper adsorbent is screened and specifically modified, so that the adsorption selectivity and the adsorption capacity of the adsorbent on the 1, 1, 1-trifluoroethane impurity in the hexafluoroethane are remarkably improved, and the content of the 1, 1, 1-trifluoroethane impurity in the hexafluoroethane can be effectively reduced to an extremely low level.

The application discloses a method for capturing hexafluoroethane, comprising the following steps: adsorbing and capturing hexafluoroethane by using a porous material and / or a shaped porous material; the porous material is formed by carboxylate ions of an organic ligand 1,4-naphthalene dicarboxylic acid and Al 3+ forming an ionic coordination bond; and the shaped porous material is obtained by wet granulation by mixing the porous material with a binder and water. The application can realize effective greenhouse gas emission reduction and resource recycling.

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.

A composition comprising: (i) 1,1-difluoroethene (vinylidene fluoride, R-1132a); (ii) carbon dioxide (CO2, R-744); (iii) pentafluoroethane (R-125); and (iv) one or more of trifluoromethane (R-23) and hexafluoroethane (R-116).

The application discloses a kind of MIL-101 (Cr) series MOFs material and its preparation method and application, it is related to chemical material technical field.The preparation method of the material includes: terephthalic acid or its derivative, chromium salt, modifier and water are mixed, and mixture is obtained;The mixture is heated under closed condition, and MIL-101 (Cr) series MOFs material is obtained.The MIL-101 (Cr) series MOFs material is used for separating hexafluoroethane and hydrogen fluoride hydrocarbon mixed gas, and separation effect is good when separating, it is very stable in air, the time of obtaining pure component is long, reusability is good, it is not necessary to use N, N-dimethylformamide and acetone multiple exchange soaking before column packing, can be applied strongly, raw material is cheap and easy to obtain and can be prepared in large quantities.

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.

The invention discloses a treatment method of fluorine-containing waste gas, which comprises the following steps: introducing fluorine-containing waste gas containing fluorine-containing gas into an adsorber filled with a modified activated carbon adsorbent at an air speed of 50-5000h <-1 >, the pressure of the adsorber is 0.05-0.5 MPa, the temperature of an adsorbent bed layer is 10-120 DEG C, the fluorine-containing gas comprises hexafluoroethane, and the fluorine-containing gas comprises hexafluoroethane. Nanometer zero-valent metal and a hydrophobic material are loaded on the surface of the modified activated carbon adsorbent, and the nanometer zero-valent metal is selected from at least one of Fe, Co and Mn. The treatment method disclosed by the invention is simple in process and low in investment cost, the fluorine-containing gas in the fluorine-containing waste gas can be efficiently enriched, and greenhouse gas emission is reduced.