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AssigneeNippon Shokubai Co., Ltd.
InventorsYukihiro Yoneda, Tokumasa Ishida, Masahiro Uemura
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The present invention provides a process and its utilization in a process comprising the step of carrying out an addition reaction of an alkylene oxide to an addition-receiving substance in the presence of a resin catalyst, thereby producing the addition reaction product, when the resin catalyst as used for the reaction is persevered so as to recycle it after it is recovered, the unreacted alkylene oxide remaining in the resin catalyst can be prevented from polymerizing and solidifying during the preservation, and the resin catalyst accordingly can be preserved stably for a long time. The resin catalyst as recovered after it is used for the reaction may be preserved under any of the following conditions: 1) at a low temperature of not higher than 40° C.; 2) in the presence of a carboxylic acid; 3) in the presence of a liquid having an alkylene oxide concentration of not more than 2 weight %; and 4) in the coexistence of a carboxylic acid and a liquid having an alkylene oxide concentration of not more than 2 weight %. The present catalyst is recycled for the above addition reaction.
A process for preserving a resin catalyst for an addition reaction of an alkylene oxide, which comprises the steps of:
A process for preserving a resin catalyst for an addition reaction of an alkylene oxide, which comprises the steps of:
A process for preserving a resin catalyst for an addition reaction of an alkylene oxide, which comprises the steps of:
A process for preserving a resin catalyst for an addition reaction of an alkylene oxide, which comprises the steps of:
Dependencies are inferred from the claim text.