The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2018
Filed:
Apr. 22, 2014
Maruzen Petrochemical Co., Ltd., Chuo-ku, JP;
National Institute of Advanced Industrial Science and Technology, Chiyoda-ku, JP;
Masuo Yamazaki, Ichihara, JP;
Takashi Naniki, Ichihara, JP;
Toshikazu Takahashi, Tsukuba, JP;
Hiroyuki Yasuda, Tsukuba, JP;
Shouji Yamamoto, Tsukuba, JP;
MARUZEN PETROCHEMICAL CO., LTD., Chuo-ku, JP;
National Institute of Advanced Industrial Science and Technology, Chiyoda-ku, JP;
Abstract
Disclosed herein is a method for producing silica gel-immobilized phosphonium salt catalysts including the steps of (a) reacting a silane compound with a silica gel in the presence of xylene, to obtain a catalyst precursor having a haloalkyl group or a haloaryl group, wherein the silane compound has a haloalkyl group or a haloaryl group, and a proportion of the silane compound is from 0.001 to 0.06 mol relative to 1 mol of the silica gel, and (b) reacting the catalyst precursor with a tertiary phosphine in xylene, to obtain a catalyst for synthesizing a cyclic carbonate, in which the silane compound is represented by formula (1), and the tertiary phosphine is represented by formula (2):X—R—Si(OR)  (1)