National Institute of Advanced Industrial Science and Technology

Jun-Chul Choi

Norihisa Fukaya

Hiroyuki Yasuda

Kazuhiko Sato

Seong-Jib Choi

Toshio Horikoshi

Hiroshi Kumai

Minoru Hasegawa

Sho Kataoka

Thuy Nguyen

Qiao Zhang

An object of the present invention is to provide a method capable of producing a tetraalkoxysilane with a high energy efficiency and with a high yield. The present invention provides a method for producing a tetraalkoxysilane, the method including: a first step of reacting an alcohol with a silicon oxide; and a second step of bringing a vaporized component of the reaction mixture obtained in the first step into contact with a molecular sieve.

Method for producing tetraalkoxysilane

A method of production of carbamic acid ester has a high yield and high selectivity and is superior in economy. The method of production of a carbamic acid ester includes reacting an amine, carbon dioxide, and an alkoxysilane compound in the presence of a catalyst containing a zinc compound or an alkali metal compound or in the presence of an ionic liquid. A carbamic acid ester is produced, for example by reacting aniline, carbon dioxide, and tetramethoxysilane at a temperature of 150 to 180&#xb0; C. in the presence of zinc acetate and 2,2'-bipyridine.

Production method of carbamic acid ester

An object of the present invention is to provide a method for producing tetraalkoxysilane while saving energy at a high yield. Tetraalkoxysilane can be produced while saving energy at a high yield by the method including a first step of reacting alcohol with carbon dioxide in the presence of a dehydrating agent and/or in a reactor provided with a dehydrating means, and a second step of reacting a reaction mixture obtained in the first step with silicon oxide.

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Ibaraki, Japan

Jun-Chul Choi