Asahi Glass Company, Limited

Ag Technology Co., Ltd.

Shin Tatematsu

Takashi Okazoe

Kunio Watanabe

Daisuke Shirakawa

Masahiro Ito

Hidenobu Murofushi

Hidekazu Okamoto

Shinsuke Morikawa

Koichi Yanase

Yasuhiro Suzuki

Kazuya Oharu

Shunichi Samejima

Masakuni Sato

Kenji Yamada

Shigeki Kobayashi

Hirokazu Takagi

Norihide Sugiyama

Kazuhiko Yamada

Masao Iwaya

Hiroki Nagai

Keiichi Ohnishi

Masaru Yoshitake

Nobuyuki Kasahara

Toshihiro Tanuma

Masaharu Tanaka

Isamu Kaneko

Yasuhiko Matsuoka

Yutaka Furukawa

Shinya Higuchi

Hajime Katayama

Takashi Ohmori

Toshiya Matsubara

Kimiaki Kashiwagi

Masayuki Tamura

Kenichi Ebata

Jun Irisawa

Masataka Arai

Gen Ogawa

Kentarou Tsunozaki

Terence Edwin Attwood

Steven McDonald

Philip David Mackrell

Shigeki Hiraoka

Masaru Yositake

A process for producing inorganic spheres, which comprises injecting an aqueous liquid containing an inorganic compound into a laminar flow of an organic liquid which runs at a flow rate of from 0.001 to 2 m/s in a flow path through a porous membrane to form a W/O type emulsion and solidifying the aqueous liquid containing an inorganic compound in the W/O type emulsion.

Process and apparatus for producing inorganic spheres

A gas/liquid mixing equipment of the present invention comprises a stirring vessel, a stirring shaftinserted horizontally in the stirring vesseland a helical ribbon impellerattached to the stirring shaft, whereby a high gas absorption performance can be secured even with low shearing. Further, a polymer can be produced with high productivity. A gas/liquid mixing method of the present invention is a method which comprises employing the above-mentioned gas/liquid mixing equipment, and a method for producing a polymer of the present invention is a method which comprises polymerizing feed monomers containing gaseous monomers in aqueous solvents, wherein the gaseous monomers and the aqueous solvents are mixed by such a gas/liquid mixing method. A polymer of the present invention is produced by the above-mentioned method for producing a polymer.

Gas/liquid mixing equipment, gas/liquid mixing method, polymer and method for its production

The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester compound, which comprises fluorinating an ester compound which is an ester of a compound having hydroxyl group(s) with a compound having acyl fluoride group(s) and which has a structure which can be fluorinated, in a liquid phase to produce a fluorinated ester compound, wherein the fluorination is carried out in the form of a liquid mixture of the ester compound and the compound having acyl fluoride group(s).

Method for producing a fluorinated ester compound

The invention provides a process for producing a fluorine-containing compound from an inexpensive material. Namely, Compound I such as RCHOH is reacted with Compound II such as XCORto form Compound III such as RCHOCOR, followed by fluorination in a liquid phase to form Compound IV such as RCFOCOR, which is converted to Compound V such as RCOF and/or Compound VI such as RCOF. Ris an alkyl group or the like, Ris a perhalogenoalkyl group or the like, Rand Rare fluorinated Rand R, and X is halogen.

Process for producing a fluorine-containing compound by liquid phase fluorination

The present invention provides a method for preparing a compound of CFCFCFOCF&#x2550;CFby pyrolyzing a compound expressed by CFCFCFOCF(CF)COOCFCF(CF)OCFCFCFin a gas phase at a temperature of from 200&#xb0; C. to 500&#xb0; C.

Method for preparing unsaturated compound by pyrolysis reaction

A process for producing a fluorinated ester through a small number of steps, is presented. The process for producing a fluorinated ester, comprises a transesterification step in which R&#x2014;COOCF&#x2014;Rand R&#x2014;CHOH are subjected to a transesterification reaction to obtain R&#x2014;COOCH&#x2014;R, and a fluorination step in which the obtained compound is fluorinated to obtain a reaction product containing R&#x2014;COOCF&#x2014;R. Here, in the formulae, Ris a monovalent organic group, and Ris the same group as Ror a monovalent organic group obtained by fluorination of R.

Process for producing a fluorinated ester, a fluorinated acyl fluoride and a fluorinated vinyl ether

A fluorinated polyvalent carbonyl compound is produced by an economically advantageous method from inexpensive materials without requiring a complicated synthetic process step. Namely, the present invention comprises reacting a polyvalent alcohol having at least two kinds of alcohol skeletons selected among a primary alcohol, a secondary alcohol and a tertiary alcohol, with an acid halide to obtain a polyvalent ester compound, fluorinating it in a liquid phase to obtain a perfluorinated polyvalent ester compound, and cleaving the ester bonds derived from primary and secondary alcohols in the perfluoropolyvalent ester compound to obtain a fluorinated polyvalent carbonyl compound.

Process for producing fluorinated polyvalent carbonyl compound

A process for producing inorganic spheres, which comprises injecting an aqueous liquid containing an inorganic compound through an inlet hole into an organic liquid which flows at a flow rate of from 0.001 to 2 m/s in a laminar flow state in a flow path to form a W/O type emulsion, and solidifying the aqueous liquid containing an inorganic compound in the W/O type emulsion.

Process for producing inorganic spheres

Provided is a tetrafluoroethylene copolymer consisting of a unit based on tetrafluoroethylene and a unit based on a monomer represented by CF&#x2550;CFORR(where Ris a polyfluoroalkylene group which may contain an etheric oxygen atom and Ris a polyfluorocycloalkyl group which may contain an etheric oxygen atom), wherein a content of the latter is from 0.005 to 0.5% by mass. The tetrafluoroethylene copolymer is excellent both in paste extrudability and in heat resistance, has characteristics such as excellent transparency of a molded product, and is suitably applicable to paste extrusion and compression molding.

Tetrafluoroethylene copolymer

The present invention provides a process whereby fluorinated ketones of various structures can be produced by short process steps and which is useful as an industrial production process. Namely, it is a process for producing a fluorinated ketone of the following formula (5), which comprises reacting a compound of the following formula (3) having a fluorine content of at least 30 mass %, with fluorine in a liquid phase to obtain a compound of the following formula (4), and then, subjecting the ester linkage of the compound of the formula (4) to a dissociation reaction:RCOOCHRR&#x2003;&#x2003;(3)RCOOCFRR&#x2003;&#x2003;(4)RRC&#x2550;O&#x2003;&#x2003;(5)wherein each of Rand Rare each a monovalent organic group such as an alkyl group, or Rand Rmay be bonded to each other to form a bivalent organic group such as an alkylene group, Rand Rare a monovalent organic group such as a perfluoroalkyl group formed by fluorination of Rand R, or they are bonded to each other to form a bivalent organic group such as a perfluoroalkylene group, and Rand Rare each a monovalent organic group such as a perfluoroalkyl group which may contain an etheric oxygen atom.

Process for producing fluorinated ketone

The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available.

Method for producing a fluorine-containing compound

The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether. Namely, it provides a process for preparing a fluorinated acyl fluoride (3), which comprises reacting a compound (1) having a fluorine content of 30 mass % or above with fluorine in a liquid phase to form a compound (2) and then dissociating the ester bond in the compound (2), and a process for preparing a fluorinated vinyl ether (10), which comprises pyrolyzing the fluorinated acyl fluoride:wherein Rand Rare alkyl groups or the like, or the combination Rand Ris an ethereal oxygen-containing alkylene group or the like, Rand Rare perfluoro(ethereal oxygen-containing alkyl) groups or the like, or the combination of Rand Ris a perfluoro(ethereal oxygen-containing alkylene) group or the like, X, X, X, X, Xand Xare hydrogen atoms, fluorine atoms or the like, R, R, Rand Rare groups derived respectively from R, R, Rand Rby replacing substantially all of the hydrogen atoms by fluorine atoms.

Processes for the preparation of fluorinated acyl fluorides and fluorinated vinyl ethers

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Yokohama, Japan

Shin Tatematsu