77 results about "Hexafluoropropylene oxide" patented technology

The invention discloses a continuous synthesis and purification method of hexafluoropropylene oxide, which comprises the following steps: introducing hexafluoropropylene, oxygen and a fluorine-containing solvent into a supergravity reactor to carry out oxidation reaction at the reaction temperature of 100-200 DEG C under the reaction pressure of 1.0-2.5 Mpa for 10-120 seconds, and after the reaction is finished, overflowing and leading out reaction liquid to obtain the hexafluoropropylene oxide. And purifying to obtain the hexafluoropropylene oxide. According to the method, the problems of mass transfer and heat transfer can be effectively solved by using the supergravity reactor, the reaction selectivity is remarkably improved, meanwhile, the productivity is effectively improved, and the supergravity reactor is combined with extractive distillation treatment, so that the conversion rate of the hexafluoropropylene reaches 79% or above, the selectivity of the hexafluoropropylene oxide is 85% or above, and the purity of the hexafluoropropylene oxide after extractive distillation reaches 99%. The invention further discloses a device used in the continuous synthesis and purification method, and cyclic utilization of hexafluoropropylene and the fluorine-containing solvent can be achieved.

The invention provides a system and a process method for co-production of hexafluoropropylene oxide and trifluoroacetic acid, and relates to the technical field of fluorine chemical industry. The system comprises a raw material storage device, a liquid phase oxidation reaction device, a rectifying tower, a hydrofluoric acid absorption tank, a trifluoroacetic acid absorption tank, a process water tank, a hydrofluoric acid concentration detector and a trifluoroacetic acid concentration detector. According to the method, the hydrofluoric acid and the trifluoroacetic acid are co-produced while the hexafluoropropylene oxide is produced, so that complex production processes such as use of non-renewable resources, high raw material price, use of a catalyst for catalysis, addition of an auxiliary agent and the like in the traditional hydrofluoric acid and trifluoroacetic acid production process are avoided; the technology for continuously producing hydrofluoric acid and trifluoroacetic acid, which is simple and efficient in technological process, low in raw material price and free of catalyst catalysis, is developed, and the technology is relatively high in technicality, low in safety risk and suitable for industrial application.

The invention provides a process system and a process method for recycling a hexafluoropropylene oxide byproduct high-boiling residue, and relates to the field of fine fluorine chemical industry. The process system comprises a heat exchange device, a tubular pyrolysis reaction device, a carbonyl fluoride-trifluoroacetyl fluoride separation tower, a tubular cracking reaction device, a water washing device and an alkali washing device. According to the method disclosed by the invention, the industrial-grade carbonyl fluoride and trifluoroacetyl fluoride are prepared by catalytically pyrolyzing the hexafluoropropylene oxide by-product high-boiling residue; furthermore, a byproduct high-boiling residue of hexafluoropropylene oxide is subjected to complete catalytic cracking to obtain carbonyl fluoride, and a byproduct industrial hydrofluoric acid can be obtained. According to the process system and the process method, the hexafluoropropylene oxide byproduct is recycled into carbonyl fluoride, trifluoroacetyl fluoride and industrial hydrofluoric acid with high added values, harmlessness and recycling of the hexafluoropropylene oxide byproduct high-boiling residues are achieved, the utilization rate of fluorine atoms is 100%, and the process method is mild in reaction condition, economical and environmentally friendly.

The invention discloses a method for resource utilization of fluorine-containing waste gas in hexafluoropropylene oxide production and co-production of hydrofluoroether, which comprises the following steps of: firstly, reacting the fluorine-containing waste gas in hexafluoropropylene oxide production under the action of a fluorine ion catalytic system to generate a perfluorinated intermediate product; then, the perfluorinated intermediate product reacts with an alkylating reagent under the action of a fluorinating reagent to produce a hydrofluoroether product. Hydrofluoroether products with different structures are obtained by utilizing the characteristics of nucleophilic addition reaction of a by-product acyl fluoride and hexafluoropropylene in the production of hexafluoropropylene oxide and utilizing the characteristics of the addition product for preparing hydrofluoroether by using the same alkylation process; the hydrofluoroether products are widely applied to the fields of semiconductor temperature control fluid, data center immersion heat exchange fluid, electrified cleaning agents and inert diluents of base stations or weak current equipment and the like, and have high added value.

The invention belongs to the field of preparation of ether substances, and particularly relates to a preparation method of perfluoro-2-alkoxy propionyl fluoride and perfluoroalkyl vinyl ether. The preparation method of the perfluoro-2-alkoxy propionyl fluoride comprises the following steps: carrying out addition reaction on acyl fluoride and hexafluoropropylene oxide in a polar aprotic solvent in the presence of an organic base catalyst, a phase transfer catalyst and a phase transfer cosolvent to prepare the perfluoro-2-alkoxy propionyl fluoride, the phase transfer cosolvent is selected from a hexafluoropropylene dipolymer, a hexafluoropropylene tripolymer or 1, 3-bis (trifluoromethyl) benzene. The method provided by the invention can effectively reduce the generation of HFPO polymer by-products, thereby improving the yield of the target product.

The invention provides a synthetic method of hexafluoropropylene oxide and application thereof, and relates to the technical field of fluorine chemical industry, and the synthetic method comprises the following steps: under supercritical conditions, hexafluoropropylene and oxygen are subjected to complete mixed flow induction to generate reaction free radicals, then the reaction free radicals are subjected to a reaction through a microchannel reactor, and the hexafluoropropylene oxide is continuously synthesized. The invention solves the technical problems of low conversion rate, low selectivity and rearrangement of hexafluoropropylene oxide into hexafluoroacetone during synthesis of hexafluoropropylene oxide in the prior art, and achieves the technical effects of high conversion rate, high selectivity and green continuous synthesis of hexafluoropropylene oxide.

The invention relates to the technical field of ultraviolet absorbents, in particular to a synthesis method of a hexafluoropropylene oxide tripolymer, which comprises the following steps: S1, carrying out reaction on cyanuric chloride and aromatic hydrocarbon to obtain an intermediate product 1-chloro-3, 5-diaryltriazine, S2, carrying out reaction on cardanol and nitric acid to generate an intermediate product nitro cardanol, S3, carrying out reaction on 1-chloro-3, 5-diaryltriazine and 1-chloro-3, 5-diaryltriazine, and carrying out reaction on 1-chloro-3, 5-diaryltriazine and 1-chloro-3, 5-diaryltriazine to obtain the hexafluoropropylene oxide tripolymer. The preparation method comprises the following steps: (1) reacting 2, 5-diaryltriazine with nitrocardanol to obtain an intermediate product A, (2) reacting the intermediate product A with active iron powder and diluted hydrochloric acid to obtain an intermediate product B, and (3) continuously stirring the intermediate product B with sodium nitrite, nitrous acid and diluted hydrochloric acid to react, and adding a reducing agent and heating after the reaction is finished to obtain the target product cardanol modified triazine ultraviolet absorbent. The synthesis method of the triazine ultraviolet absorbent provided by the invention has the advantages of simple reaction conditions, green production and high weather resistance of the product.

The invention provides a green and efficient production method of hexafluoropropylene oxide, and belongs to the technical field of synthesis of organic fluorine compounds. The method comprises the following steps: carrying out a continuous oxidation reaction on hexafluoropropylene, oxygen and a perfluoro solvent in an immersed supergravity reactor to generate HFPO and byproducts carbonyl fluoride and trifluoroacetyl fluoride, removing the solvent from the reacted liquid, feeding the liquid into an acyl fluoride rectifying tower, separating low-boiling-point acyl fluoride from the tower top, enriching HFPO, unreacted HFP and a small amount of acyl fluoride from the tower bottom, and carrying out a continuous oxidation reaction on the HFPO and the byproducts carbonyl fluoride and trifluoroacetyl fluoride. Converting acyl fluoride into anhydrous trifluoroacetic acid from a high-boiling-point substance at the bottom of the tower through a hydrolysis tower, carrying out alkali washing on the synthesis gas to obtain an HFPO crude product, and further carrying out drying and extractive distillation to obtain an HFPO product; acyl fluoride rectified by an acyl fluoride rectifying tower is directly used for producing PAVE, and long-chain perfluoroacyl fluoride accumulated in a solvent of oxidation reaction is hydrolyzed to synthesize a non-PFOA emulsifier. The method has the advantages of high HFPO selectivity, short reaction time and high safety; the method realizes resource comprehensive utilization of byproducts, and is environment-friendly and economical.

The invention discloses a thermal viscosity-reducing adhesive, a thermal viscosity-reducing adhesive tape and a preparation method of the thermal viscosity-reducing adhesive tape. The soft monomer is composed of one or more of isononyl acrylate, heptyl acrylate, polycaprolactone acrylate, polyethylene oxide-based acrylate, siloxane modified acrylate, vinyl octanoate and isododecyl acrylate; the hard monomer is prepared from one or more of dicyclopentadiene acrylic ester, poly (p-phenylene terephthamide), hexafluoropropylene oxide and polyaryletherketone; the functional monomer is composed of one or more of epoxy propyl acrylate, sulfo acrylate, mercapto acrylate and methoxyl acrylate. According to the scheme, by optimizing the ratio of the soft monomer to the hard monomer, the stripping force of the adhesive can be accurately controlled under the high-temperature process condition, so that the stable bonding force is kept, excessive stripping or bonding strength reduction is avoided, and the stripping requirement after the high-temperature process is met.

The invention discloses a synthesis method of low-molecular-weight perfluoropolyether acyl fluoride, which comprises the following steps: hexafluoropropylene, oxygen, a catalyst and a fluorine-containing solvent are subjected to an oxidative polymerization reaction, the reaction liquid is subjected to light component removal and solvent removal to obtain the low-molecular-weight perfluoropolyether acyl fluoride, and the temperature of the oxidative polymerization reaction is 130-300 DEG C. According to the invention, hexafluoropropylene is used as a raw material and is oxidized by oxygen in a fluorine-containing solvent, so that low-component perfluoropolyether acyl fluoride is synthesized in one step. In the presence of a catalyst, formyl fluoride, trifluoroacetyl fluoride and hexafluoropropylene oxide continue to be added into an oligomer, and the oligomer is mainly perfluoropolyether acyl fluoride with a straight-chain structure. And when the reaction temperature is within the range, the smooth proceeding of the oxidative polymerization reaction can be ensured, the sharp rise of the reaction pressure caused by the overhigh reaction temperature can be avoided, and the model selection of reaction equipment is convenient.

The invention discloses a synthesis method of perfluoro-n-propyl vinyl ether, and in the method, an inorganic metal salt catalyst has a strong capability of being combined with fluorine, and can be combined with acyl fluoride of a dimer to form a transition state in a reaction process, so that the acyl fluoride becomes a leaving group after the temperature is raised, and the leaving group is removed. In order to reduce the content of hydrogen-containing ether generated in the synthesis process of the perfluoro-n-propyl vinyl ether, the embodiment of the invention further provides a method for synthesizing the perfluoro-n-propyl vinyl ether by catalyzing the decarboxylation reaction of hexafluoropropylene oxide dimer carboxylic acid by using transition metal Lewis acid. A hexafluoropropylene oxide dimer is used as a raw material and is catalyzed by transition metal salt to generate a decarboxylation reaction to generate the perfluoro-n-propyl vinyl ether, the reaction can effectively avoid the defect that hydrogen-containing ether byproducts are easy to generate in the synthesis method, and the separation method is simplified.

The invention discloses a method for synthesizing heptafluoro-n-propyl ether by taking hexafluoropropylene oxide as a raw material. The method comprises the following steps: with hexafluoropropylene oxide as a raw material, carrying out a ring-opening reaction under the action of a supported metal catalyst to obtain perfluoropropionyl fluoride; and mixing the perfluoropropionyl fluoride with inorganic fluoride, and then adding an aprotic polar solvent and an alkylating reagent to carry out alkylation reaction, thereby obtaining the perfluoropropionyl fluoride. The active metal of the supported metal catalyst comprises at least one of Ni, Fe, Co and Cu; a carrier of the supported metal catalyst is modified lignocellulose biochar. The supported metal catalyst is adopted to synthesize the perfluoropropionyl fluoride intermediate product, the reaction efficiency is improved, the reaction conditions are milder, the yield and purity of the obtained intermediate product are high, and the heptafluoro-n-propyl ether product continuously synthesized by adopting the intermediate product is high in yield and good in quality. The method greatly reduces the production cost of hydrofluoroether, and is simple in process and suitable for industrial production.

The invention discloses a production system for resource utilization of fluorine-containing waste gas in production of hexafluoropropylene oxide and co-production of hydrofluoroether, which is used for resource utilization of fluorine-containing waste gas in production of hexafluoropropylene oxide and comprises an intermediate reaction system, a hydrofluoroether co-production system and a hydrofluoroether co-production system, the intermediate reaction system is used for reacting fluorine-containing waste gas in hexafluoropropylene oxide production under the action of a fluorine ion catalyst to generate a perfluorinated intermediate product; an alkylation reactor, in which the perfluorinated intermediate product reacts with an alkylation reagent under the action of a fluorination reagent to generate an alkylation product; the cleaning and drying system is used for cleaning and drying the alkylated product; the rectification system is used for rectifying the cleaned and dried alkylated product to obtain a hydrofluoroether product.

The present invention provides a method for simply, safely and industrially producing trifluoroacetyl fluoride (TFAF) and carbonyl fluoride (COF2).　This method for producing trifluoroacetyl fluoride and carbonyl fluoride includes a step for introducing at least one reactant selected from the group consisting of hexafluoropropylene and hexafluoropropylene oxide, and oxygen and a diluent compound into a reactor to obtain a product gas containing trifluoroacetyl fluoride and carbonyl fluoride.

The invention relates to the field of fluorine-containing fine chemicals, and discloses a method for continuously preparing a hexafluoropropylene oxide dimer. The method comprises the following steps: mixing an organic solvent with specific moisture, a composite catalyst consisting of an organic amine catalyst and a metal salt catalyst, and a polymer inhibitor, continuously adding hexafluoropropylene oxide in a nitrogen environment, and continuously synthesizing the hexafluoropropylene oxide dimer through reaction at a certain reaction temperature and stirring rate. Compared with an existing hexafluoropropylene oxide dimer preparation technology, the preparation method has the advantages that the dosage of the composite catalyst is small, the catalytic efficiency is high, the environmental protection property is good, and the yield of the obtained hexafluoropropylene oxide dimer is high; meanwhile, the process and used equipment are simple, easy to operate, low in cost and suitable for industrial continuous production.

The invention belongs to the field of fluorine chemical industry, and particularly relates to a microchannel reaction tube bundle and a device and method for continuously preparing hexafluoropropylene oxide. The micro-channel reaction tube bundle comprises one or more parallel micro-channel reactors; each micro-channel reactor comprises a plurality of continuous reaction units; and each reaction unit comprises an S-shaped ascending section and a vertical descending section. When the microchannel reaction device provided by the invention is used for preparing hexafluoropropylene oxide, continuous synthesis can be realized under the conditions of normal temperature and lower pressure. The reaction is carried out in the micro-channel reactor, an amplification experiment is carried out, and the productivity reaches a pilot scale.

The invention belongs to the field of fluorine chemical industry, and particularly relates to a preparation method of a hexafluoropropylene oxide oligomer, which comprises the following steps: adding a solvent and a catalyst into a stirring reactor with a proper length-diameter ratio, and introducing hexafluoropropylene oxide in a stirring state; a valve is arranged at the bottom of the stirring reactor, and when the fluorine phase liquid level at the bottom of the stirring reactor is increased to a certain height, the bottom valve is opened; controlling the bottom liquid outlet rate to keep the height of the reaction liquid stable; and after the reaction is finished, collecting a component flowing out of a valve at the bottom, namely the hexafluoropropylene oxide oligomer. The method has the beneficial effects that the operation is simple, the product is easy to separate from the solvent and the catalyst, and large-scale production is easy.

The invention belongs to the technical field of organic fluorine chemical industry, and particularly relates to hexafluoropropylene oxide as well as a synthesis method and a synthesis device thereof. The synthetic method of the hexafluoropropylene oxide comprises the following processes: firstly, heating dimethyl sulfide and monochlorodifluoromethane in a solvent for reaction, then adding the obtained intermediate into a sodium hydride solution at 30-50 DEG C for reaction to obtain a reaction solution, finally, adding trifluoroacetyl fluoride into the reaction solution for reaction at 15-30 DEG C, treating the obtained reaction solution, and finally, separating and purifying to obtain the hexafluoropropylene oxide. The hexafluoropropylene oxide is obtained. And recovering the solvent and dimethyl sulfide. The synthesis method of hexafluoropropylene oxide provided by the invention is mild in reaction condition and stable in reaction, the synthesized hexafluoropropylene oxide is high in yield and high in purity, and the invention also provides a synthesis device of hexafluoropropylene oxide, which is low in energy consumption.

The invention discloses a bimetallic catalyst for high-selectivity preparation of hexafluoropropylene oxide and application of the bimetallic catalyst, and belongs to the field of catalysts. The active component of the bimetallic catalyst disclosed by the invention is gold-palladium (Au-Pd) alloy nanoparticles loaded on an anatase type TiO2 carrier. Wherein the molar ratio of Au to Pd is (1: 1)-(3: 1), the Au-Pd alloy can give full play to the unique electronic effect within the proportion range, namely, the d-band center of Pd moves downwards, Au is in an electron enrichment state, and the Au-Pd alloy and the Au are in a synergistic effect, so that the oxygen adsorption and activation capacity is remarkably optimized. When the catalyst is applied to preparation of HFPO through HFP gas-phase catalytic oxidation, the bottlenecks of low conversion rate and selectivity, severe reaction conditions and short catalyst life in the prior art can be overcome, and technical support is provided for green and efficient industrial production of HFPO.

The invention belongs to the technical field of organic fluorine polymer synthesis, and discloses perfluoropolyether with narrow molecular weight distribution and a preparation method and application thereof.The method comprises the steps that in an aprotic polar solvent, phosphazene organic super base and anhydrous hydrogen fluoride or perfluoroalcohol are mixed according to the molar ratio of 1: 0.5-1: 1.5, and a mixture is obtained; forming in situ a non-metallic active initiation complex containing large-volume counter cations; at the temperature of-50 DEG C to 10 DEG C, introducing a hexafluoropropylene oxide monomer into the initiation system, and carrying out anionic ring-opening polymerization until a preset number-average molecular weight is reached; after polymerization, maintaining a liquid phase, directly adding a perfluoroalkyl sulfonate end-capping reagent, and reacting at 20-80 DEG C to convert an active end group into an inert perfluoroalkyl ether end group; and performing post-treatment to obtain the perfluoropolyether product. The invention solves the problems of wide molecular weight distribution, low safety and high equipment cost in the traditional process, and the product is suitable for semiconductor vacuum pump oil and precise electronic cleaning agent, and has obvious industrial application value.

The invention discloses a method for preparing perfluoropolyether with different molecular weights by a formula type solvent, and belongs to the technical field of perfluoropolyether preparation, the method comprises the following steps: mixing one or more hydrofluoroethers, an aprotic polar solvent and a catalyst, adding the mixture into a reaction kettle, introducing hexafluoropropylene oxide for polymerization until the reaction temperature reaches 25 + / -2 DEG C, and stopping the reaction to obtain the perfluoropolyether, the polymerization yield is greater than 95%; and controlling the type and ratio of the added hydrofluoroether to obtain perfluoropolyether with different molecular weights. The perfluoropolyether has the beneficial effects that the perfluoropolyether with specific molecular weight is prepared by combining different types of hydrofluoroethers with different proportions with other system compounds in the formula, and the perfluoropolyether is high in reaction yield, safe, environment-friendly, mild in condition and simple in process and can be widely applied in industry.

The invention belongs to the technical field of chemical synthesis, and discloses a system for preparing perfluoro n-propyl vinyl ether, comprising a sequentially connected reaction device, a condensing device and a gas absorption device; the reaction device is used to heat hexafluoropropylene oxide dimer, a salt-forming agent and a catalyst, and a salt-forming reaction and a decarboxylation reaction occur in sequence, and a salt-forming reaction product and a decarboxylation reaction product are obtained respectively; the condensing device is used to condense and reflux the hexafluoropropylene oxide dimer and the catalyst and separate the carbon dioxide gas in the two reaction products and the perfluoro n-propyl vinyl ether in the decarboxylation reaction product; the gas absorption device is used to absorb the carbon dioxide gas generated by the reaction. Based on the preparation system of the present invention and the method of reducing the addition of the salt-forming agent and recovering the excess hexafluoropropylene oxide dimer to produce perfluoro n-propyl vinyl ether, the purity and yield of the prepared PPVE and the by-product fluoride salt are both very high.

The invention relates to the technical field of hexafluoropropylene oxide, and particularly discloses a method for removing impurities in hexafluoropropylene oxide. The method for removing impurities in hexafluoropropylene oxide comprises the following steps that hexafluoropropylene oxide gas containing acyl fluoride substances is conveyed into an alkaline washing tower to be subjected to alkaline washing and impurity removal, and an alkaline buffer system is applied to the interior of the alkaline washing tower for alkaline washing. The method has the advantages that the loss amount of hexafluoropropylene oxide in alkali washing is remarkably reduced, and the process control difficulty is low.

The present disclosure provides, for example, a method that can produce a fluorolactone compound from hexafluoropropylene oxide or the like in a single step. The present disclosure relates to a method for producing a compound represented by formula (1): wherein two R1 are the same and each is a fluorine atom or a fluoroalkyl group, the method comprising step A of reacting a compound represented by formula (2): wherein R1 is as defined above, with a compound (3) represented by formula (3-1) or the like: wherein R31, R32, and R33 are the same or different and each is a hydrogen atom or a C1-10 alkyl group, or two of them are optionally linked to each other to form a ring optionally having one or more substituents, in the presence of a fluorine compound (4) represented by formula (4-1) or the like:          MHnFm     (4-1) wherein M is a metal atom, n is 0 or 1, and the sum of the valence number of M and n is m, and an organic solvent, provided that the compound represented by formula (3) is excluded from the organic solvent.

The present invention relates to the field of fluorine chemical technology, and in particular to the production process of hexafluoropropylene oxide trimer. The production process of hexafluoropropylene oxide trimer described in the present invention, comprises the following steps: molecular sieve is prepared by impregnation method: SBA 15 molecular sieve is vacuum impregnated in fluoride salt and fluorine-containing quaternary ammonium salt aqueous solution for loading, and the molecular sieve after loading is transferred to a vacuum drying oven for drying; the molecular sieve after drying is filled in a fixed bed; the fixed bed is heated, and the vaporized hexafluoropropylene oxide and nitrogen are passed from the upper part of the fixed bed for reaction, and the finished product clear liquid obtained by the reaction flows out from the lower part and is collected in a receiving tank after condensation. The present invention adopts the production mode of fixed bed to control the reaction process of hexafluoropropylene oxide, the space velocity ratio of nitrogen to hexafluoropropylene oxide and the loading amount of molecular sieve control the addition reaction of hexafluoropropylene oxide, and the product discharging position is controlled according to the filling length of the molecular sieve in the fixed bed, so that the trimer can be prepared in a directional manner.

The purpose and the problem of the present invention are to provide a rearrangement preventing agent, particularly a rearrangement preventing agent for suppressing rearrangement of a fluorine-containing cyclic ether compound such as hexafluoropropylene oxide, or the like. The above-described problem can be solved by a rearrangement inhibitor for hexafluoropropylene oxide containing a compound represented by formula (2) [in the formula, L represents a methylene group or the like, and R2a, R2b, R2c, and R2d are the same or different and each represents a hydrogen atom or the like. Wherein one or two of R2a, R2b, R2c and R2d may be the same or different and each represents a C1-C4 alkyl group, and the others represent a hydrogen atom. ]. # imgabs0 #

This invention provides a method and system for preparing trifluoropyruvate esters using a centrifugal method, relating to the field of organofluorine chemical synthesis technology. The centrifugal method for preparing trifluoropyruvate esters includes: circulating and spraying an alcohol-ether solution containing an aldehyde compound and a catalyst in a centrifugal reactor, and introducing hexafluoropropylene oxide to catalyze the reaction between the aldehyde compound and hexafluoropropylene oxide, yielding a reaction product; separating the reaction product into gas and liquid phases, and separating the gas phase product by distillation to obtain trifluoropyruvyl fluoride and hydrofluorocarbons; and esterifying the trifluoropyruvyl fluoride and alcohol in a microchannel reactor to obtain trifluoropyruvate esters. The centrifugal method for preparing trifluoropyruvate esters described in this invention has advantages such as simple and readily available raw materials, mild reaction conditions, and high conversion and yield.

The application discloses a kind of high-efficiency multi-metal catalyst for synthesizing hexafluoropropylene oxide, and belongs to the field of catalyst preparation.The multi-metal catalyst of the application is Cu, Ce, Mo ternary metal catalyst, comprising: 1wt%-5wt% of Cu, 0.5wt%-3wt% of Ce, 0.1wt%-1wt% of Mo and 85wt%-95wt% of phosphoric acid modified mesoporous silica carrier, wherein, Cu is loaded in the form of nanoparticle with particle size of 5-20nm, Ce exists in the form of cerium oxide, and Mo exists in the form of molybdate.The multi-metal catalyst plays catalytic activity through the oxidation activity of Cu 0 , the oxygen storage capacity of CeO2 and the electronic regulation effect of MoO4 2‑ , is suitable for preparing hexafluoropropylene oxide from hexafluoropropylene gas phase oxidation, has high raw material conversion rate, and can reduce reaction temperature.

The invention provides a production process of perfluoropolyether oil, and belongs to the technical field of polymer fluorine materials. The method comprises the following steps: activating a metal fluoride catalyst, an aprotic polar solvent and a cocatalyst in a polymerization reaction kettle, adding hexafluoropropylene oxide to prepare a perfluoropropylene oxide oligomer containing an acyl fluoride end group, and carrying out end group stabilizing treatment on the oligomer by using a fluorinating reagent. And carrying out reduced pressure distillation on the obtained product, treating with an adsorbent, and dehydrating to obtain the perfluoropolyether oil. According to the method, the solubility of the hexafluoropropylene oxide and the catalyst is improved, the conversion rate of the hexafluoropropylene oxide is improved, and the yield of the product is increased.

This invention belongs to the field of perfluoropentanone preparation technology, specifically relating to a continuous production process for perfluoropentanone. The continuous production process for perfluoropentanone includes the following steps: a fluorination catalyst is loaded into a reaction tube, purged with nitrogen, and a preheated mixture of hexafluoropropylene and trifluoroacetyl fluoride is introduced into the reaction tube for continuous reaction. Part of the reacted gas is condensed to obtain the target product, perfluoropentanone, while the other part is recycled back to the mixing and preheating stage. This continuous production process for perfluoropentanone uses hexafluoropropylene and trifluoroacetyl fluoride as raw materials, and employs a one-step gas-phase continuous flow method to rapidly synthesize perfluoropentanone under the action of a MgF2-based fluorination catalyst. No solvent is required, and the trifluoroacetyl fluoride raw material is a byproduct of the preparation of hexafluoropropylene oxide, making the raw materials readily available. The process route is simple, with high conversion rate and high selectivity, facilitating large-scale industrial production.