Process for producing dimethylcarbonate
Patent 4318862 Issued on March 9, 1982. Estimated Expiration Date: 
November 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 12, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3846468 Method of making carbonic acid esters Method for the preparation of esters of carbonic acid Carbonylation process Patent #: 4234504 InventorsAssigneeApplicationNo. 06/205949 filed on 11/12/1980US Classes:558/277Two identical or diverse alkyl groups bonded directly to the -O-C(=O)O- group (e.g., dimethyl carbonate, methyl ethyl carbonate, etc.)ExaminersPrimary: Sutto, Anton H.Attorney, Agent or FirmInternational ClassesB01J 23/72 (20060101)B01J 27/10 (20060101) B01J 27/06 (20060101) C01B 3/50 (20060101) C01B 3/00 (20060101) C07C 67/00 (20060101) C07C 68/00 (20060101) C07C 69/00 (20060101) C07C 68/04 (20060101) C07C 67/36 (20060101) C07C 69/96 (20060101) Foreign Application Priority Data1979-12-04 ITAbstractA process for preparing dimethylcarbonate by reacting methanol with mixtures of carbon monoxide and oxygen which also contain hydrogen. The catalyst is constituted by a salt of a metal of groups IB, IIB or VIII of the periodic system, dissolved or dispersed in the reaction medium.It has been found that the hydrogen does not interfere in the reaction, so that a hydrogen-enriched gaseous mixture (synthesis gas) is withdrawn from the reactor. It is therefore particularly advantageous in that it produces dimethylcarbonate and at the same time provides hydrogen-enriched synthesis gas. |
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