21 results about "Fluorohydrocarbon" patented technology

A method of producing fluoroolefin includes contacting a fluorocarbon represented by Formula (1): CX1X2F—CX3X4H with a catalyst to produce a fluoroolefin represented by Formula (2): CX1X2═CX3X4, and satisfies either (I) or (II). (I) The catalyst includes 65% by mass or more of α-alumina and has an amount of Lewis acid sites of from 0.005 to 0.10 mmol / g as measured by ammonia temperature-programmed desorption method. (II) A conversion rate 10 hours after contacting the fluorocarbon with the catalyst is from 7.0 to 13.0%, and a conversion retention rate, which is a ratio of the conversion rate 50 hours after contact to a conversion rate after 10 hours, is 69% or higher.

An object of the present disclosure is to provide a method for dehydrating a composition containing a fluorine-based hydrocarbon compound, such as HFC-134a. The dehydration method includes the step of bringing a composition containing a fluorine-based hydrocarbon compound into contact with a zeolite.

Provided is a composition for a refrigerator, which is a mixture of a mixed refrigerant that has a low global warming potential and contains carbon dioxide, and a refrigerator oil that has excellent compatibility with the mixed refrigerant and that has excellent thermal stability with respect to the mixed refrigerant. The composition for a refrigerator contains a refrigerant mixture and a refrigerator oil containing a base oil, the refrigerant mixture containing a fluorinated hydrocarbon compound and carbon dioxide, and the base oil containing at least one selected from the group consisting of polyvinyl ethers and polyol esters.

A method of treating a process waste stream contaminated with fluorinated hydrocarbons, the method comprising: adding a fluoride anion scavenger to the process waste stream; and contacting the process waste stream with a platinum group metal catalyst to defluorinate the fluorinated hydrocarbons liberating fluoride anions which are scavenged by the fluoride scavenger.

A method of producing fluoroolefin includes contacting a fluorocarbon represented by Formula (1): CX1X2F—CX3X4H with an alumina-containing catalyst to produce a fluoroolefin represented by Formula (2): CX1X2═CX3X4, in which the alumina-containing catalyst satisfies at least one of the following conditions (I) or (II). (I) A total content of alkali metal elements and alkaline earth metal elements is 100 ppm by mass or less. (II) A Si content is 1000 ppm by mass or less.

The invention provides a heat transfer composition as well as a preparation method and application thereof. The heat transfer composition comprises fluoroalkane, first fluorohydrocarbon, second fluorohydrocarbon and a carbon-oxygen compound or / and hydrocarbon, the content of the fluoroalkane, the content of the first fluorohydrocarbon and the content of the second fluorohydrocarbon are x%, y% and z% respectively on the basis that the total mass of the fluoroalkane, the first fluorohydrocarbon and the second fluorohydrocarbon is 100%, a point A (47.3, 5.4 and 47.3), a point B (47.3, 35.6 and 17.1), a point C (5.0, 68.2 and 26.8) and a point D (5.0, 22.4 and 72.6) exist in a component three-phase diagram, and coordinates (x, y and z) are located on a line segment AB, a line segment BC, a line segment CD and a line segment DA or located in an area defined by the four line segments. The heat transfer composition is low in GWP value, environmentally friendly, good in heat exchange effect and wide in application scene.

A radiation-sensitive resin composition includes: an onium salt compound (1) represented by formula (1); an onium salt compound (2) different from the onium salt compound (1); a resin including a structural unit which includes an acid-dissociable group; and a solvent. W is a monovalent chain organic group having 1 to 40 carbon atoms, a monovalent cyclic organic group having 5 or less carbon atoms, or a monovalent group obtained by combining a monovalent chain organic group having 1 to 40 carbon atoms and a cyclic structure having 5 or less carbon atoms; R1 and R2 are each independently a hydrogen atom, a fluorine atom, a monovalent hydrocarbon group, or a monovalent fluorinated hydrocarbon group; R3, R4, and R5 are each independently a fluorine atom or a monovalent fluorinated hydrocarbon group; m1 is an integer of 1 to 8; and Z+ is a monovalent radiation-sensitive onium cation.

The invention belongs to the technical field of silicone rubber, and particularly relates to an anti-pollution silicone weather-resistant sealant and a preparation method thereof. The preparation method comprises the following steps: carrying out a reaction on hydroxyl-terminated polydimethylsiloxane with the viscosity of 100-1000 mpa.s and a fluoroalkyl dialkoxy silane compound, so as to obtain a D-type fluorosiloxane chain extender; the preparation method comprises the following steps: reacting hydroxyl-terminated polydimethylsiloxane with the viscosity of 20000 to 100000 mpa.s with a fluoroalkyl trialkoxysilane compound to obtain a T-type fluorosiloxane polymer; mixing the T-type fluorosiloxane polymer with the filler, heating and dehydrating, cooling to normal temperature, sequentially adding the D-type fluorosiloxane chain extender, the cross-linking agent, the coupling agent and the catalyst, and uniformly mixing to obtain the anti-pollution silicone weather-resistant sealant.

The present disclosure mainly addresses the problem of providing a novel method for producing a fluoroolefin.　Provided as a solution is a method for producing a fluoroolefin represented by general formula (1): CX1X2=CX3X4 (where X1, X2, X3, and X4 are identical or different and each represent a hydrogen atom, a fluorine atom, or a chlorine atom, and at least one of X1, X2, X3, and X4 is a fluorine atom), said method comprising a dehydrohalogenation step for bringing a fluorocarbon represented by general formula (2): CX1X2HCX3X4Y (where X1, X2, X3, and X4 are the same as above, and Y is a fluorine atom or a chlorine atom) into contact with a noble metal catalyst to perform dehydrohalogenation.

The present application relates to fluorinated hydrocarbon refining purification technical field, specifically to the purification device and method of pharmaceutical grade R134a, the device includes industrial grade R134a product tank, initial separation condenser, feed pump, degassing tower, rectifying tower, product condenser, adsorber and pharmaceutical grade product tank connected in turn, the purification method is: the raw material is condensed to remove non-condensable gas, the liquid phase enters the rectifying tower to remove light components, then enters the rectifying tower to remove heavy components and isomers, the gas phase condenses after the top of the rectifying tower and enters the adsorber filled with gradient fluorinated modified activated carbon, and the R1122 impurities and moisture are deeply removed, the present application adopts HF-N2 gradient concentration and temperature modification activated carbon, the micropore aperture is accurately controlled to 0.6-0.9nm and the polar C-F bond is formed on the surface, the double targeted capture of R1122 is realized, and finally the high-quality pharmaceutical grade R134a product with purity ≥99.99% and no R1122 detection is stably obtained.

A method for ion assisted etching of a stack of alternating silicon oxide and silicon nitride layers in an etch chamber is provided. An etch gas comprising a fluorine component, helium, and a fluorohydrocarbon or hydrocarbon is flowed into the etch chamber. The gas is formed as an in-situ plasma in the etch chamber. A bias voltage of about 10 volts to about 100 volts is provided to accelerate helium ions to the stack and activate a surface of the stack to form an activated surface for ion assisted etching, where the in-situ plasma etches the activated surface of the stack.

The present invention relates to a nano microcapsule fire extinguishing device, belonging to the technical field of fire extinguishing material applications, including: a nano microcapsule layer, the nano microcapsule layer having a number of first nano microcapsules and a number of second nano microcapsules, the first nano microcapsules filled with sodium bicarbonate, and the second nano microcapsules filled with perfluoromethyl hexanone and citric acid; the total weight ratio of sodium bicarbonate to citric acid in the nano microcapsule layer is 21:16; the weight ratio of perfluoromethyl hexanone to citric acid in the second nano microcapsules is 11:1000; it can solve the technical problem in the prior art that a large amount of nano microcapsules are loaded, resulting in the decomposition of fluorohydrocarbons under continuous heating conditions, which pollutes the ozone layer.

A radiation-sensitive resin composition includes: a base resin comprising a structure unit having an acid-dissociable group; and a radiation-sensitive acid generator which comprises compounds represented by formula (2) and formula (3), and optionally a compound represented by formula (1). R1-R3 are each independently a group having a cyclic structure; X11-X32 are each independently a hydrogen atom, a fluorine atom, or a fluorinated hydrocarbon group. At least one of X11 or X12, at least one of X21 or X22, and at least one of X31 or X32 are not a hydrogen atom, respectively. A11-A32 are each independently a hydrogen atom, or a hydrocarbon group having a carbon number of 1 to 20. The radiation-sensitive resin composition does not comprise a ketone-based solvent. The the radiation-sensitive resin composition does not comprise a monovalent onium cation other than an onium cation represented by formulas (X-1), (X-3), (X-4), or (X-5).

To provide: a lubricating oil base oil which causes a refrigerant having the lubricating oil base oil blended therewith to have an improved chemical stability when used for a long period; and a lubricating oil composition including the lubricating oil base oil.SOLUTION: The lubricating oil base oil according to the present invention is blended with a refrigerant. The refrigerant includes one or more unsaturated fluorohydrocarbon compounds selected from a compound represented by the following formula i, the lubricating oil base oil includes a compound represented by the following formula 1, and the lubricating oil base oil has a metal content of 10 ppm or less: the formula i CxFyHz (in the formula i, x is an integer of 2 to 6, y is an integer of 1 to 11, z is an integer of 1 to 11, and one or more carbon-carbon unsaturated bonds are present in its molecule); and the formula 1 R1{(R2O)mR3}n (R1 is an initiator residue, R2s are each independently a 2-4C hydrocarbon group, R3s are each independently a hydrogen atom or a 1-4C alkyl group, at least one of the R3s is a 1-4C alkyl group, m is 1 to 200, and n is 1 to 8.SELECTED DRAWING: None

A radiation-sensitive resin composition includes: an onium salt compound represented by formula (1), a resin including a structural unit which includes an acid-dissociable group, and a solvent. R1, R2, and R3 each independently represent a monovalent chain organic group having 1 to 10 carbon atoms; R4, R5, and R6 each independently represent a hydrogen atom, a fluorine atom, a monovalent hydrocarbon group, or a monovalent fluorinated hydrocarbon group; Rf1 represents a fluorine atom or a monovalent fluorinated hydrocarbon group; m1 represents an integer of 0 to 8; m2 represents an integer of 1 to 4; and Z+ represents a monovalent radiation-sensitive onium cation.

To provide a method for dehydrating a composition containing a fluorine-based hydrocarbon compound such as HFC-134a.SOLUTION: A dehydration method includes a step of bringing a composition containing a fluorine-based hydrocarbon compound into contact with zeolite.SELECTED DRAWING: None

Provided is a composition for refrigerators, which is a mixture of a refrigerant mixture containing carbon dioxide and a refrigerant oil having a low global warming potential value, and which has excellent thermal stability, and which contains the refrigerant mixture and the refrigerant oil containing a base oil, the mixed refrigerant contains a fluorinated hydrocarbon compound and carbon dioxide, the content of the fluorinated hydrocarbon compound is less than 25 mass% based on the total amount of the mixed refrigerant, and the base oil contains at least one selected from the group consisting of polyvinyl ethers and polyalkylene glycols.

A fluorine-containing copolymer composition comprising a fluorine-containing copolymer, a compound (A) having a fluorine atom-containing biphenyl backbone and two or more vinyl groups, a compound (B) represented by the following formula (1), and a crosslinker, wherein a mass ratio of the compound (A) to the compound (B) (the compound (A) / the compound (B)) is 1.5 or less:wherein in the formula (1), R21 and R22 are each independently —CH2— or —CF2—, and Rf21 represents a divalent C1-10 fluorohydrocarbon group or the fluorohydrocarbon group having an etheric oxygen atom at an end thereof or in a carbon-carbon bond thereof.

A refrigerator oil composition used in a refrigerant containing one or more unsaturated fluorinated hydrocarbon compounds selected from compounds represented by the following general formula (1): CxFyHz (1), wherein x is an integer of 2 to 6, y is an integer of 1 to 11, z is an integer of 1 to 11, and there are one or more carbon-carbon unsaturated bonds in the molecule, the refrigerator oil composition containing a base oil (A) that includes polyvinyl ether, a modified silicone compound (B), and a specific epoxy compound (C).

A radiation-sensitive resin composition includes: an onium salt compound represented by formula (1); a resin including a structural unit (I) represented by formula (2); and a solvent. R1, R2, and R3 are each independently a monovalent organic group having 1 to 10 carbon atoms, or two or three of R1, R2, and R3 taken together represent a monovalent or divalent group containing a cyclic structure having 3 to 20 carbon atoms together with the carbon atom to which the two or three of R1, R2, and R3 are bonded. R4 and R5 are each independently a hydrogen atom, a fluorine atom, a monovalent hydrocarbon group, or a monovalent fluorinated hydrocarbon group. R10 is a monovalent group including at least one structure selected from the group consisting of a lactone structure, a cyclic carbonate structure, and a sultone structure.