Asahi Glass Company, Limited

Agc Inc.

Shoji Furuta

Yu Takeuchi

Ryuji Seki

Tetsuo Otsuka

Tomoaki Taniguchi

Hidefumi Shiota

Keisuke Mori

Keiko Nakase

Yusuke Sugahara

Hidekazu Okamoto

Toshiyuki Tanaka

Taiki Hoshino

Kazuya Oharu

Takashige Maekawa

Kazuhiko Yamada

Katsuya Ueno

Minako Shimada

Hiroshi Funaki

Kazunori Sugiyama

Kyouichi Kaneko

Fusaaki Takeo

Mayako Takahashi

Minako Ishikawa

The method of purifying 1224yd (Z) includes: distilling a composition comprising 1224yd (Z) and 244bb in a presence of an extracting solvent comprising at least one compound selected from the group consisting of an alcohol, an ether, a nitrile, a ketone, a carbonate ester, an amide, an ester, a sulfoxide, a hydrocarbon, a chlorohydrocarbon, and a fluorohydrocarbon; and thereby, separating at least a part of 244bb from the composition.

Method of purifying (Z)-1-chloro-2,3,3,3-tetrafluoropropene

There is provided an economically advantageous manufacturing method capable of efficiently obtaining 1-chloro-2,3,3,3-tetrafluoropropene by using 1,2-dichloro-2,3,3,3-tetrafluoropropane as a raw material. A manufacturing method of 1-chloro-2,3,3,3-tetrafluoropropene is characterized in that it includes subjecting 1,2-dichloro-2,3,3,3-tetrafluoropropane to a dehydrochlorination reaction in a liquid phase in a presence of a base.

Manufacturing method of 1-chloro-2,3,3,3-tetrafluoropropene

A composition is provided containing HFO-1123 having a low GWP, which is useful as a heat transfer composition, an aerosol sprayer, a foaming agent, a blowing agent, a solvent or the like. A composition containing HFO-1123, and at least one first compound selected from the group consisting of HFO-1132, HFO-1132a, CFO-1113, HCFO-1122, HCFO-1122a, HFC-143 and methane.

Composition containing trifluoroethylene

To provide a liquid repellent composition which is excellent in liquid repellency and durability and an article having a liquid repelling film. A liquid repellent composition comprising a copolymer (I) and a copolymer (II), characterized in that the copolymer (I) containing from 65 to 95 mass % of a polymerized unit (a) (referred to as '[a]') and from 1 to 30 mass % of a polymerized unit (b); and the copolymer (II) containing from 25 to 80 mass % of a polymerized unit (a) (referred to as '[a]') and from 1 to 50 mass % of a polymerized unit (c) are contained in an amount of the copolymer (I)/the copolymer (II)=10/90 to 95/5 (mass ratio), and [a]&#x2212;[a]&#x2267;10 (mass %).

Liquid repellent composition, liquid repellent processing method, and article having liquid repellent film

To provide a method for obtaining 1,1-dichloro-3,3,3-trifluoropropane by reacting 1,1-difluoroethylene with dichlorofluoromethane, which suppresses the production of chloroform as a by-product and achieves a product having a high R-243fa concentration. This method is characterized by obtaining 1,1-dichloro-3,3,3-trifluoropropane by reacting 1,1-difluoroethylene with dichlorofluoromethane in the presence of trifluoromethane.

Method for producing 1,1-dichloro-3,3,3-trifluoropropane

To provide an economically advantageous process for producing HFO-1234yf useful as a new refrigerant in sufficiently high yield by one reaction involving thermal decomposition. A process for producing HFO-1234yf and VdF from raw material containing R22, R40 and TFE, by a synthetic reaction involving thermal decomposition, which comprises (a) a step of supplying the R22, the R40 and the TFE to a reactor, as preliminarily mixed or separately, (b) a step of supplying a heat medium to the reactor, and (c) a step of bringing the heat medium in contact with the R22, the R40 and the TFE in the reactor to form the HFO-1234yf and the VdF.

Process for producing 2, 3, 3, 3-tetrafluoropropene and 1, 1-difluoroethylene

To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition containing HFO-1234yf and R40. A method for separating HFO-1234yf containing substantially no R40, which comprises bringing an azeotropic composition or azeotrope-like composition of H FO-1234yf and R40 into contact with a specific extraction solvent.

Method for purifying tetrafluoropropene

To provide an economically advantageous process for producing industrially useful HFO-1234yf efficiently and in a sufficiently controlled state by one reaction involving thermal decomposition, by using readily available raw material. A process for producing 2,3,3,3-tetrafluoropropene from a raw material composition containing chlorodifluoromethane and chloromethane, by a synthetic reaction involving thermal decomposition, which comprises (a) a step of supplying the chlorodifluoromethane and the chloromethane to a reactor, as preliminarily mixed or separately, in such amounts that the chloromethane would be in a ratio of from 0.01 to 3 mol to 1 mol of the chlorodifluoromethane, (b) a step of supplying a heat medium to the reactor, and (c) a step of bringing the heat medium in contact with the chlorodifluoromethane and the chloromethane in the reactor to form the 2,3,3,3-tetrafluoropropene.

Process for producing 2, 3, 3, 3-tetrafluoropropene

To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition comprising HFO-1234yf and R40. An azeotrope-like composition comprising from 58 to 78 mol % of HFO-1234yf and from 22 to 42 mol % of R40, and a method for producing HFO-1234yf, which comprises steps of distilling an initial mixture containing HFO-1234yf in a content exceeding 63 mol % in the total amount of HFO-1234yf and R40, thereby to separate the initial mixture into a first fraction in which the content of HFO-1234yf in the total amount of HFO-1234yf and R40 is lower than the content of HFO-1234yf in the total amount of HFO-1234yf and R40 in the initial mixture, and a second fraction in which the content of HFO-1234yf in the total amount of HFO-1234yf and R40 is higher than the content of HFO-1234yf in the total amount of HFO-1234yf and R40 in the initial mixture, and then obtaining HFO-1234yf having a reduced R40 concentration, from the second fraction.

Azeotropic or azeotrope-like composition, and method for producing 2,3,3,3-tetrafluoropropene or chloromethane

A process for producing a fluoroalkyl iodide as a telomer R(CFCF)I (wherein Ris a Cfluoroalkyl group, and n is an integer of from 1 to 6) by telomerization from a fluoroalkyl iodide represented by the formula RI (wherein Ris as defined above) as a telogen and tetrafluoroethylene (CFCF) as a taxogen, which comprises a liquid phase telomerization step of supplying a homogeneous liquid mixture of the telogen and the taxogen from the lower portion of a tubular reactor, moving the mixture from the lower portion towards the upper portion of the reactor in the presence of a radical initiator over a retention time of at least 5 minutes while the reaction system is kept in a liquid phase state under conditions where no gas-liquid separation will take place, so that the taxogen supplied to the reactor is substantially consumed by the reaction in the reactor, and drawing the reaction product from the upper portion of the reactor.

Fluoroalkyl iodide and its production process

To provide a process for producing a fluoroalkyl iodide, whereby the selectivity for a fluoroalkyl iodide having a desired degree of polymerization is high and the productivity is high. A process for producing a fluoroalkyl iodide (2) represented by RCFCFI (wherein Ris a fluoroalkyl group having at most 4 carbon atoms), which comprises reacting a fluoroalkyl iodide (1) represented by RI with tetrafluoroethylene in the presence of a radical initiator, wherein a first reaction step of supplying and reacting tetrafluoroethylene and a radical initiator to the fluoroalkyl iodide (1), is followed by repeating (n&#x2212;1) times (provided that n is an integer of at least 3) a subsequent reaction step of supplying and reacting a radical initiator, or a radical initiator and tetrafluoroethylene, to a reaction mixture (1) formed in the first reaction step.

Process for producing fluoroalkyl iodide

To provide a process for safely producing a perfluoroacyl peroxide with good productivity. By supplying a perfluoroacyl halide-containing organic solvent solution, an aqueous solution of hydrogen peroxide or a metal peroxide, and an aqueous basic alkali metal compound solution to a tubular reactor to allow them to react with one another, in a flow rate ratio of, as represented by molar ratio of the compounds in the solutions, from 1.00 to 1.35 of the basic alkali metal compound and from 0.60 to 40 of hydrogen peroxide or the metal peroxide per 1 of the perfluoroacyl halide, the yield of a perfluoroacyl peroxide based on the material perfluoroacyl halide can be remarkably improved as compared with conventional technique.

Process for producing perfluoro organic peroxide

A process for producing a fluoroalkyl iodide as a telomer R(CFCF)I (wherein Ris a Cfluoroalkyl group, and n is an integer of from 1 to 6) by telomerization from a fluoroalkyl iodide represented by the formula RI (wherein Ris as defined above) as a telogen and tetrafluoroethylene (CFCF) as a taxogen, which comprises a liquid phase telomerization step of supplying a homogeneous liquid mixture of the telogen and the taxogen from the lower portion of a tubular reactor, moving the mixture from the lower portion towards the upper portion of the reactor in the presence of a radical initiator over a retention time of at least 5 minutes while the reaction system is kept in a liquid phase state is under conditions where no gas-liquid separation will take place, so that the taxogen supplied to the reactor is substantially consumed by the reaction in the reactor, and drawing the reaction product from the upper portion of the reactor.

A process for producing a polyfluoroalkyl (meth)acrylate, which comprises isolating, from a reaction mixture containing a polyfluoroalkyl (meth)acrylate obtained by reacting a polyfluoroalkyl iodide of the formula CF(CH)I (wherein n is an integer of from 2 to 7, and m is an integer of from 1 to 4) with a metal (meth)acrylate in tert-butanol, said polyfluoroalkyl (meth)acrylate by the following steps (1) to (3):

Process for producing a polyfluoroalkyl (meth)acrylate

The following fluorine-containing compound is presented which is capable of providing dry soil resistance when incorporated to a water and oil repellent. RROCOCHCHRCOORR(wherein each of Rand Rwhich are independent of each other, is a Cpolyfluoroalkyl group, Ris a hydrogen atom or a Calkyl group, and each of Rand Rwhich are independent of each other, is a Calkylene group, etc.).

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Chiyoda-ku, Japan

Shoji Furuta