188 results about "Fluoroform" patented technology

The invention discloses a preparation method of vinylidene fluoride and a preparation method of a catalyst used by the same. The preparation method of vinylidene fluoride comprises the following steps: mixing methane, oxygen and fluoroform or monochlorodifluoromethane or the mixed gas of fluoroform and monochlorodifluoromethane at any ratio or the mixed gas of multiple gases including fluoroform and monochlorodifluoromethane; adding O2 at a certain proportion, and reacting at a temperature of 550-1,050 DEG C under a total pressure of 1-10bar and at an air speed of 50-10,000h<-1>; and reacting in the presence of a catalyst to generate vinylidene fluoride. According to the method disclosed by the invention, the vinylidene fluoride with relatively high added value is generated under a catalytic action from several waste fluoroform raw materials which are cheap or need forced treatment, has relatively high added value, and brings good economic and social benefits.

When etching ONO laminated construction of SONOS parts, the method uses mixed gas of carbon tetrafluoride (CF4) and fluoroform (CHF3) as main etching gas instead of mixed gas of HBr and C2F6, and uses CHF3 as over etching gas instead of mixed gas of CH2F2/SF6. Using mixed gas of CF4 and CHF3 accomplishes main etching and over etching step for one time so as to simplify etching technique. Based on good etching selectivity and suitable etching speed, the method controls and buffers effect for etching ONO laminated construction by plasma of etching gas. In procedure for etching wafer thin oxidizing layer of grid electrode, the method is capable of controlling etching depth accurately, stopping etching at oxidation surface at low layer of ONO. Moreover, the method eliminates concave phenomena at sidewall and root part of polysilicon gate caused by transversal etching.

The invention relates to a non-combustible mixing refrigerant suitable for deep refrigeration temperature of minus 80 DEG C to minus 100 DEG C. The non-combustible mixing refrigerant comprises five groups of materials, where the first group of material is tetrafluoromethane; the second group of material is trifluoromethane, hexafluoroethane or a mixture of the trifluoromethane and the hexafluoroethane; the third group of material is pentafluoroethane, trifluoroethane, perfluoropropane, difluoromethane or a mixture of two, three or multiple of the pentafluoroethane, the trifluoroethane, the perfluoropropane and the difluoromethane; the fourth group of material is iodotrifluoromethane, 1, 1, 2, 2-tetrafluoroethane, 1,1-difluoroethane, 2, 3, 3, 3-tetrafluoropropene, 1, 3, 3, 3-tetrafluoropropene or a mixture of two, three or multiple of the iodotrifluoromethane, the 1, 1, 2, 2-tetrafluoroethane, the 1,1-difluoroethane, the 2, 3, 3, 3-tetrafluoropropene and the 1, 3, 3, 3-tetrafluoropropene; the fifth group of material is perfluoro-n-butane, 1, 1, 1, 3, 3-perfluoropropane or a mixture of the perfluoro-n-butane and the 1, 1, 1, 3, 3-perfluoropropane; the molar concentrations of the five groups of materials are respectively 25-50%, 15-40%, 10-30%, 5-20% and 10-25%; and the non-combustible mixing refrigerant is safe in a back-heating type throttling refrigeration system, can realize the refrigeration in the temperature range of minus 80 DEG C to minus 100 DEG C and has low whole green house effect without ozone depletion effect.

The invention relates to an electrophilic fluoroform sulfenyl reagent and a synthetic method and application thereof. The structural formula of the electrophilic fluoroform sulfenyl reagent is shown in the specification. The synthetic method disclosed by the invention is simple and convenient and can be used for preparing a fluoroform sulfenyl product by reacting the electrophilic fluoroform sulfenyl reagent with a nucleophilic reagent.

The invention relates to a method for refining a chlorine hydride byproduct and recovering trifluoromethane in production of monochlorodifluoromethane. Refined high-purity chlorine hydride can directly serve as a raw material for synthesizing vinyl chloride monomers; and the trifluoromethane byproduct separated in the refining process can be effectively recovered, wherein the refining of the HCl comprises the following steps of: crude separation, absorption, analysis, condensation, capture of acid mist, and adsorption; and after a F23 byproduct in the production of the monochlorodifluoromethane is separated in the absorption process in the refining of the HCl, the F23 byproduct is subjected to lossless compression and rectification to form the trifluoromethane with the purity of over 99 vol percent. By combining the recovery and comprehensive utilization of the HCl and the recovery of the trifluoromethane, the high consumption of water resources and liquid caustic soda is avoided, and the production cost of the monochlorodifluoromethane is reduced; and the effective recovery of the trifluoromethane prevents environmental pollution, and the chloroalkali, the monochlorodifluoromethane and polyvinyl chloride (PVC) can be circularly produced.

The invention relates to a main material of a crosslinking polymer film in the technical field of high molecular material and a preparation method and a using method thereof. Through Michael addition polymerization, the invention obtains hyper branched polyamide containing an end double bond. By the protonation of a tertiary amine unit, the introducing of anion ligand and thermal initiation and self crosslinking of the end double bond, the main material of the crosslinking polymer film can be prepared. The components of the material the contents of the weight percentage are as follows: 12 to 19wt percent of amide group, 17 to 29wt percent of methylene, 2 to 3wt percent of protonated tertiary amine and 52 to 66wt percent of fluoroform sulfonate radical. The material of the invention can not only efficiently enrich object dye molecules from an aqueous solution, but also can efficiently enrich precious metal ions from the aqueous solution and restore the metal ions to be internally embedded metal nanoparticles in position. The invention has simple operation and is environment friendly; therefore, the invention can be applied to the treatment of waste water containing dye, the recycling of precious metal or metal-catalyzing and other fields.

The multicomponent mixed work medium throttling refrigerating agent applicable to 200-240 k temp. zone includes four groups of substances, respectively are: first group includes tetrafluoromethane, nitrogen trifluoride or mixture; second group includes ethylene, ethane, fluoroform, xenon, fluromethane, perfluoroethylene, fluoroethylene, perfluoroethane or their any two, three and several kinds or mixture of all them; fourth group includes 1-butylene, isobutane, 2-methyl butane, 1-pentene, 3-methyl-1-butylene, 2-methylpentane, 2-butylene, cyclobutane, isobutylene, n-butane, pefluorobutane, n-pentane, perfluoropentane or their two, three, several kinds ormixture of all the them; and third group includees propylene, propane, perfluoropropane, 1,1,1-trifluoroethane, 1,1,-bifluoroethane.

The invention provides a technique for preparing monochlorodifluoromethane by decomposing trifluoromethane. The technique comprises the steps of: feeding the raw materials trifluoromethane and methane chloride into a reactor filled with a catalyst in the mol ratio of 0.1-10, and carrying out a decomposition reaction at a temperature ranging from 150 to 350 DEG C for 3-30 seconds to obtain a mixture of trifluoromethane, methane chloride, dichloromonofluoromethane and monochlorodifluoromethane; obtaining monochlorodifluoromethane directly through separation, reacting dichloromonofluoromethane separated out with hydrogen fluoride to produce monochlorodifluoromethane, and separating out and recovering trifluoromethane and methane chloride in the mixture as the reaction mixture continuously. The method has the advantage that the harm on the environment caused by trifluoromethane emission is greatly avoided.

The invention discloses a method of recycling trifluoromethane. The method includes: under action of at least one catalyst of MgF2, Al2O3, partially fluorinated alumina and AlF3, allowing trifluoromethane and dichloromethane to react to obtain a reaction product containing difluoromethane and monochlorodifluoromethane, and rectifying to obtain difluoromethane. The method can realize recycling of trifluoromethane, can convert the same into difluoromethane with high value and has great economic benefit.

The invention discloses a method for catalyzing and esterifying sulfoacid basal functional ion liquid in the formula (1), wherein, n equals to 2, 3 and 4; R is H or C1 to C4 saturated or unsaturated alkyl of straight chain or branched chain; negative ion B- is chlorine, bromine, iodine, sulfate radical, hydrogen sulfate radical, nitric acid radical, dihydrogen phosphate radical, tetrafluoride boric acid radical, hexaflurate phosphoric acid radical, acetic acid radical, methyl sulfoacid radical, paratoluenesulfonic acid radical, fluoroform sulfoacid radical and trifluoroacetic acid radical. The adding dosage of the ion liquid is 0.5 to 100 percent of the total mol of the alcohol and acid, reacting for 0.5 to 12 hours under the normal pressure and the temperature of 20 to 140 DEG C, the esterifying reaction is catalyzed to produce the ester. Compared with the traditional acidic catalyst, the ion liquid simplifies the separation of the product of the esterifying reaction and provides higher selectivity. The invention is distinctly characterized in that the phase separation between the produced ester and the catalyst is automatically finished, and the ion liquid is reusable after simple or non treatment.

The invention relates to a method for synthesizing pesticide, in particular to a method for synthesizing fipronil and provides a method for synthesizing fipronil having the characteristics of simplicity in operation, mild condition, high yield and environmental friendliness. In the technical scheme, fipronil is synthesized by a catalytic oxidation method. The method comprises the following steps of: synthesizing 5-amino-3-cyan-1-(2,6-dichloro-4-trifluoro methyl-phenyl)-4-sulfur cyan-pyrazol; synthesizing a disulfide; synthesizing 5-amino-3-cyan-1-(2,6-dichloro-4-trifluoro methyl-phenyl)-4-fluoroform-sulfenyl-pyrazol; and synthesizing the fipronil.

The invention relates to a cascade refrigeration system low-temperature mixed refrigerant which is applicable to the temperature area of 180-220K and contains N2O, and a preparation method thereof; the low-temperature mixed refrigerant comprises one or two components of low-boiling point refrigerant N2O(R744A), ethane (R170), fluoromethane (R23), hexafluoroethane (R116), fluoromethane (R41), and CO2 (R744) and is formed by physical mixing at normal temperature. The low-temperature mixed refrigerant damages no ozonosphere, has low greenhouse effect potential, meets the requirement of environmental protection, has suitable thermal parameters and excellent circulation performance, and can optimize and design the new refrigerant system by the existing cascade low-temperature compressor. The mixed refrigerant can be used for replacing the refrigerant in the existing cascade refrigeration low-temperature system.

The invention relates to a trifluoromethanesulfonic acid preparation method. The method includes: taking halogenated trifluoromethane as a raw material, adding zinc powder and terahydrofuran under the environment of nitrogen protection and feeding trifluoro bromomethane gas prior to adding catalytic amount to obtain lodine; obtaining trifluoromethyl zinc halide through temperature control reaction, adding sulfur trioxide for continuous reaction to generate halogenated trifluoromethane sulfonic acid zinc; adding reaction liquid into alkali liquid for neutralization, evaporating filter liquid to dryness to obtain solid sodium trifluoromethanesulfonate salt prior to acidizing and rectifying to obtain trifluoromethanesulfonia acid. With the method, generation of accessory substances during the production is effectively reduced; the situation about higher fluorinion, chloridion and sulfate ion in trifluoromethanesulfonia acid products in a traditional technology is avoided. In addition, the purity of the trifluoromethanesulfonia acid obtained from distillation and purification can reach 99.95% above, and the yield can reach 83%.

The invention relates to a solid-phase synthesis method of coumarin and an analogue (I) thereof and belongs to the field of organic chemistry. The method comprises the following steps: 1) taking 1% of cross-linked polystyrene resin as a carrier to prepare a polystyrene-supported seleno-succimide reagent (III); 2) using the III to induce phenyl acrylate (V) to perform intramolecular cyclization under the catalysis of trimethylsilyl trifluoromethanesulfonate so as to form 3-polystyrene-supported seleno-3,4-dihydro-benzopyran-2-ketone (VI); and 3) performing oxidation elimination on the VI via an oxidant so as to directly get the coumarin (I) without further separation. When the phenyl acrylate (V) is replaced by N-phenyl acrylamide, the analogue of the coumarin, namely a 2-quinolone compound, can be prepared through the same steps. The solid-phase synthesis method disclosed by the invention has the advantages of easily available raw materials, good product yield, high purity, simplicityand convenience in operation, simple post-treatment and great industrial application prospects.

The invention discloses a functional ionic liquid that has high electrochemical stability and a preparation method thereof. Positive ion of the ionic liquid is selected from nitrile-functionalized quaternary ammonium positive ion and negative ion thereof from one of chlorine, bromine, iodine, fluoborate, fluorophosphates, sulfate radical, nitrate radical, trifluoroacetic radical, trifluorochloromethane sulfonic acid group, bi (perfluoroalkyl group sulfonyl) imino negative ion, dinitrile amic radical and saccharin acid radical. Nitrile functional ionic liquid, the negative ion of which is halogen negative ion, is firstly prepared through reaction of pentagons or hexatomic tertiary amine with the alkyl halide that has nitrile functional groups, then ionic liquid that contains different negative ions is prepared by exchange of the negative ions. The ionic liquid has very low melting temperature, can bear the high temperature of 150 DEG C and be stable to water, hardly has vapor pressure but has good electrochemical stability, thereby the invention can be taken as solvent, catalyst ligand, electrochemical electrolyte, etc. that are applied in the fields of organic synthesis, catalytic reaction and lithium-ion battery, etc.

The invention discloses a method for preparing a fluorinated compound CFR1=CFR2 (R1, R2=F or -CF3) through trifluoromethane thermolysis. The method comprises the following steps that under the condition of no catalyst, trifluoromethane takes a gas phrase reaction with CH4, NH3, H2O or hydrogen gas to obtain the fluorinated compound under the reaction conditions that the reaction pressure is 0.1 to 1.5 MPa; the reaction temperature is 700 to 1000 DEG C; the mol ratio of the trifluoromethane to any one or several kinds of materials of CH4, NH3, H2O or hydrogen gas is (1:0) to (1:40); and the dwell time is 0.1 to 50s. The method provided by the invention has the advantages that the raw materials can be easily obtained; a catalyst does not need to be used; the operation and the control are easy; in addition, the experiment repeatability is high; and meanwhile, the conversion and reutilization of HFC-23 are well realized.

This invention is a method of producing the liquid crystal vertical tropism membrane. This invention chooses the monomer with cinnamonic acid structure at both ends of the molecule, and the hexafluorodiphene A dicinnamonic acid ester containing fluoroform radicle. At the normal temperature, dissolve the hexafluorodiphene A dicinnamonic acid ester in the solvent of quadplex hydroxy furan to confect into solution. Smear the solution on the basal board reelingly to form membrane. Shine the monomer membrane material of the hexafluorodiphene A dicinnamonic acid ester with the ultraviolet radiation, and make the both ends of the monomer molecule take place [2+2] cycloaddition reaction, then produce a tropism membrane that can induce the liquid crystal vertical tropism array. This invention avoids heat treatment at high temperature in the confecting process, which consumedly simplified the traditional technics of confecting the liquid crystal vertical tropism membrane. Compared with the traditional method of confecting the liquid crystal vertical tropism membrane, this invention has a simpler technics, and is a new method of confecting the liquid crystal vertical tropism membrane.

The invention discloses a porous silica gel supported ionic liquid polymer for adsorbing CO2 and a preparation method thereof. Raw materials of the porous silica gel supported ionic liquid polymer comprise porous silicon dioxide, 1-ethyl-3-ethylamino imidazole bi-fluoroform sulfonyl imide ion solution and azodiisobutyronitrile. According to the method, the porous silicon dioxide and the 1-ethyl-3-ethylamino imidazole bi-fluoroform sulfonyl imide ion solution are added into absolute ethyl alcohol; after the materials are mixed and uniformly stirred, the temperature is raised to 60 to 70 DEG C; then, the azodiisobutyronitrile is added; the constant temperature is maintained for reaction for 8 to 10h to obtain reaction liquid; then, the reaction liquid is put in an environment under the condition of 90 to 100 DEG C to be subjected to Soxhlet extraction for 12 to 24h; the porous silica gel supported ionic liquid polymer for adsorbing CO2 is obtained. The ionic liquid polymer for adsorbing CO2 can be singly used as an adsorbent for adsorbing CO2, and can also be used in a way of being compounded with other adsorption or absorption materials, and the adsorption performance is better.

The invention discloses a fabric softening agent. The fabric softening agent comprises the following raw materials: alpha, omega-dihydroxy polydimethyl siloxane, unsaturated glycidyl ether, Si-H-containing polydimethyl siloxane oligomer, octamethyl cyclotetrasiloxane, coupling agents, emulsifiers, an acid catalyst and water, wherein a preparation method for Si-H-containing polydimethyl siloxane oligomer comprises the following steps: mixing 20-40 parts in weight of trimethoxy silane and 1-2 parts in weight of trifluoromethanesulfonic acid, dropwise adding 10-20 parts in weight of deionized water within 20-30 min while stirring at room temperature, heating reflux for 1-2 h, cooling to room temperature, adding toluene and water for cleaning, and performing reduced pressure distillation at 60-80 DEG C to obtain the Si-H-containing polydimethyl siloxane oligomer. The fabric softening agent provided by the invention is excellent in hand feeling, resistant to washing, low in yellowing, high in hydrophilic effect, resistant to high temperature and high in shearing, and can be applied to a cheese high-shearing process and the like.

The invention provides a method for synthesizing crylic acid by catalyzing acetylene carbonyl through palladium. Acetylene, carbon monoxide and water are used as raw materials and are catalyzed to synthesize the crylic acid under the conditions that the reaction temperature is between 15 and 70 DEG C and the pressure is between 1.5 and 6MPa. The adopted catalyst uses palladium diacetate as a main catalyst; the dosage of the main catalyst is less than that of a traditional nickel-copper catalyst and is only 1/50; sulfoacid, such as methane sulfonate, trifluoromethane sulfonic acid, p-toluenesulfonic acid or the like, serves as an aid; an addition amount of the additive is that the ratio of n(-SO3H) to n(Pd2<+>) is equal to 1:1-10:1; and organic phosphine such as 2-pyridyl diphenylphosphine (2-PyPPh2) as a ligand. Compared with the nickel-copper catalyst, the catalyst has remarkable advantages that: under the mild conditions, such as the temperature of 40 DEG C and the pressure of 5 MPa, the catalyst can catalyze the acetylene carbonyl to synthesize the crylic acid at high efficiency, can effectively avoid the acetylene and the crylic acid undergoing polymerization and other side reactions, saves energy, and has safe operation and low operating expense.

The invention discloses a separating and analyzing method for lipophilic extracted substances from the agricultural waste, introduces a method using double-trimethyl silicane group fluoroform acetamide and trimethyl chlorosilane to carry on methyl silicane process after the lipophilic extracted substances is extracted through organic solvent, then using high temperature Rtx-1 capillary to carry on gas phase chromatogram analysis, determining the content and composition of the lipophiltic extracted substances.

The invention discloses a method for membrane separating gas mixture of difluo-monochloromethane and trifluoromethane, belonging to the fluorin-containing organic steam separation field. The gas mixture of difluo-monochloromethane and trifluoromethane, which is unseparated after condensation during producing refrigerants R22, passes through a gas membrane separation equipment under ambient temperature and pressure, difluo-monochloromethane first penetrates through a gas separation membrane to the other side, the gas mixture is divided into two section by the gas separation membrane, the collected difluo-monochloromethane penetration gas is compressed and reflowed into a refvigeratory-tower, difluo-monochloromethane is cooled, Liquefied and recoveried as the product, high-concentration trifluoromethane penetration gas can be directly sent to a torch to burn after standard-reach detection. The method has advantages of simple process, small device, convenient operation, high purity of obtained trifluoromethane, no secondary pollution, small investment, low operation cost and safe usage.