Maruzen Petrochemical Company, Limited

National Institute of Advanced Industrial Science and Technology

Masuo Yamazaki

Takashi Naniki

Hiroyuki Yasuda

Tomohiko Sato

Toshikazu Takahashi

Shouji Yamamoto

Ryuichi Tenjimbayashi

To provide a method capable of easily and efficiently removing a 2-alkoxyethanol from a mixture containing the 2-alkoxyethanol and a (2-alkoxyethyl) vinyl ether while suppressing a decrease in the yield of (2-alkoxyethyl) vinyl ether. A method for removing a 2-alkoxyethanol, including the step of adding one or more azeotropic solvents selected from the group consisting of alkanes having 7 to 8 carbon atoms and cycloalkanes having 7 to 8 carbon atoms to a mixture containing the 2-alkoxyethanol represented by the following formula (1)R&#x2014;O&#x2014;CHCHOH&#x2003;&#x2003;(1)

Me 1 hod for removing or collecting 2-alkoxyethanol, and method for producing (2-alkoxyethyl) vinyl ether

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&#x2014;R&#x2014;Si(OR)&#x2003;&#x2003;(1) 

Method for producing silica gel-immobolized phosphonium salt catalysts

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Ichihara, Japan

Masuo Yamazaki