Daikin Industries, Ltd.

Osaka University

Hideki Nakaya

Tatsuya Takakuwa

Kazunori Morimoto

Yoshiyuki Hiraga

Akihiro Oshima

Kazuyoshi Ichihara

Mitsuo Tsukamoto

Kenji Otoi

Motohisa Shino

Mai Hirai

Yasuhide Senba

Keiichirou Watanabe

Osamu Yamamoto

Takashi Yasuhara

Tadahiro Yabu

Takayuki Tanaka

Tomohisa Noda

Kazuyuki Satoh

Kazuyuki Satou

Yuji Imahori

Yuuta Hasumoto

Masao Noumi

Toshihiko Ohta

Atsushi Noguchi

Ryosuke Senba

Kohei Yamanoi

Mikio Nakagoshi

This disclosure provides a method for producing a hydrofluoroolefin (HFO) or fluoroolefin (FO), which is a target compound, with high selectivity, without requiring a high temperature and a catalyst in a synthesis process of the target compound. Specifically, the present disclosure provides a method for producing a hydrofluoroolefin or fluoroolefin having two, three, or four carbon atoms, comprising irradiating at least one starting material compound selected from the group consisting of hydrofluorocarbons having one or two carbon atoms and hydrofluoroolefin As having two or three carbon atoms with ionizing radiation and/or an ultraviolet ray having a wavelength of 300 nm or less, with the proviso that when the at least one starting material compound is the hydrofluoroolefin A, the resulting hydrofluoroolefin is different from the hydrofluoroolefin A.

Manufacturing method for hydrofluoroolefin or fluoroolefin

Provided is a method for producing low-molecular-weight polytetrafluoroethylene which is less likely to generate C6-C14 perfluorocarboxylic acids and salts thereof. The disclosure relates to a method for producing low-molecular-weight polytetrafluoroethylene having a melt viscosity at 380&#xb0; C. of 1.0&#xd7;10to 7.0&#xd7;10Pa&#xb7;s. The method includes (1) irradiating high-molecular-weight polytetrafluoroethylene with radiation in a substantially oxygen-free state and decomposing the high-molecular-weight polytetrafluoroethylene into a low-molecular-weight component and (2) deactivating, in a substantially oxygen-free state, at least part of main-chain radicals and end radicals generated by the irradiation and providing the low-molecular-weight polytetrafluoroethylene.

Method for producing low-molecular-weight polytetrafluoroethylene

A process for producing one or both of tetrafluoroethylene and hexafluoropropylene, which includes pyrolyzing a low molecular weight fluorine compound by continuous reaction in a microreactor.

Method for producing tetrafluoroethylene and/or hexafluoropropylene

The present invention provides a process for producing a perfluoropolyoxyalkylene peroxide compound comprising a step of reacting a perfluoroalkene with oxygen, wherein the reaction of the perfluoroalkene with oxygen is performed in a microreactor.

Process for producing perfluoropolyoxyalkylene peroxide compound

The present invention provides a process for producing a perfluoropolyoxyalkylene peroxide compound comprising a step of reacting a perfluoroalkene with oxygen, wherein the reaction of the perfluoroalkene with oxygen is performed under ultraviolet irradiation and in the presence of a fluorine source.

The present invention provides a novel method for producing hexafluoropropylene oxide, which can attain a high HFPO selectivity without using a phase transfer catalyst. Hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous solution of an oxidizing agent are introduced into a small space, thereby bringing into contact with each other and reacting hexafluoropropylene with the oxidizing agent to obtain hexafluoropropylene oxide (HFPO).

Method for producing hexafluoropropylene oxide

The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CHF(wherein n, a and b are integers which satisfy: n=3 to 8, 0&#x2266;a&#x2266;2n+1, and 1&#x2266;b&#x2266;2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.

Method for separating hexafluoropropylene oxide from hexafluoropropylene

A method of purifying a treatment target substance containing a fluorine-containing surfactant which includes removing at least part of the fluorine-containing surfactant from the treatment target substance by contacting the treatment target substance with a gas containing carbon dioxide. The fluorine-containing surfactant is an ether oxygen-free anionic compound represented by one of general formulae (1) and (2) as defined herein.

Method for purifying material to be treated and method for producing coagulated material

The present invention has for its object to provide a method of producing fluoropolymers with high productivity under comparatively low temperature and low pressure conditions which are conducive to reduced cost of commercial-scale production equipment. The present invention is directed to a method of producing a fluoropolymer which comprises polymerizing a radical polymerizable monomer in a defined reaction-field, said radical polymerizable monomer comprising a fluorine-containing ethylenic monomer and said defined reaction-field being in supercriticality-expression state with a monomer density [&#x3c1;]-monomer critical density [&#x3c1;] ratio of [&#x3c1;/&#x3c1;] not less than 1.1.

Process for producing fluoropolymer

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Osaka, Japan

Hideki Nakaya