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US 9,284,293 B2Granted
Reactive recovery of dimethyl carbonate from dimethyl carbonate/methanol mixtures
AssigneeHuntsman Petrochemical Corporation
InventorsHaibo Zhao, Mark Posey
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Abstract
A method of producing a carbonate product including mixing a DMC and methanol mixture with an alcohol, reacting the DMC with the alcohol to form carbonate product, and removing a substantial portion of unreacted DMC and methanol. In one embodiment, the method may be repeated to reach a desired alcohol conversion by adding more DMC and methanol mixture.
Claims22
A method of producing a carbonate comprising:
- supplying a dimethyl carbonate (“DMC”) and methanol composition having 20% to 80% DMC by weight into a reactor;
- mixing the DMC and methanol composition having 20% to 80% DMC by weight with an alcohol selected from an aliphatic alcohol consisting of 2 to 15 carbon atoms and an aromatic alcohol consisting of 6 to 15 carbon atoms in the reactor, wherein the weight ratio of the alcohol to the DMC and methanol composition is between about 0.25 and 10;
- reacting the DMC with the alcohol to form a carbonate product;
- and
- removing at least a portion of unreacted DMC and methanol, thereby forming a product composition containing the carbonate product and less than 10% by weight of unreacted DMC or methanol.
2 more elements
A method of producing a glycerine carbonate comprising:
- supplying a dimethyl carbonate (“DMC”) and methanol composition having 20% to 80% DMC by weight as a reactant;
- mixing the reactant with a glycerine, wherein the weight ratio of the glycerine to the DMC and methanol composition is between about 0.25 and 10;
- reacting the DMC with the glycerine to form glycerine carbonate;
- and
- removing at least a portion of unreacted and methanol, thereby forming a product composition containing the glycerine carbonate and 10% or less by weight of DMC or methanol.
2 more elements
Dependencies are inferred from the claim text.