Dialkyl carbonate production method
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsHongyu Liu, Takehiko Isobe, Yousuke Shinkai, Hidefumi Harada
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Abstract
Provided is a dialkyl carbonate production method that enables a dialkyl carbonate to be produced in a simple manner and in a short reaction time and enables easy processing of by-products. This dialkyl carbonate production method involves generation reaction of a carbonate ester through reaction between carbon dioxide and an alcohol represented by formula (1), wherein the generation reaction of a carbonate ester is performed in the presence of a carbodiimide compound represented by formula (2) (R1-R3 in the formula are as described in the description of the present application). [Chemical formula 1] R1—OH (1) [Chemical formula 2] R2—N═C═N—R3 (2)
Claims10
A method for producing a dialkyl carbonate, the method comprising a carbonate ester generation reaction that involves reaction between an alcohol represented by Formula (1) below and carbon dioxide, wherein the carbonate ester generation reaction is conducted in the presence of a carbodiimide compound represented by Formula (2) below, and
- wherein the amount of the carbodiimide compound is 0.4-0.6 mole relative to 1.0 mole of the alcohol:
- R1—OH (1)
- wherein R1 in Formula (1) above represents an optionally branched and optionally substituted alkyl group with a carbon number of 1-10
- R2—N═C═N—R3 (2)
- wherein R2 and R3 in Formula (2) above are each independently selected from:
- an optionally branched alkyl group with a total carbon number of 1-20 which may be substituted with an amino group which may have one or more alkyl groups with a carbon number of 5 or less;
- an optionally branched cycloalkyl group with a carbon number of 1-20;
- and
- an aryl group with a total carbon number of 6-30 which may be substituted with one or more alkyl groups with a carbon number of 12 or less;
- and wherein a dialkyl carbonate and water are generated and the carbodiimide compound is allowed to react with said water in the carbonate ester generation reaction.
Dependencies are inferred from the claim text.