The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2012
Filed:
Aug. 19, 2008
Garo Garbis Vaporciyan, Houston, TX (US);
Garo Garbis Vaporciyan, Houston, TX (US);
Shell Oil Company, Houston, TX (US);
Abstract
The invention relates to a process for the preparation of a diaryl carbonate, which comprises: (i) contacting an aromatic non-hydroxy compound with a carboxylic acid of formula HOC(═O)R(I), wherein Ris a hydrocarbyl group, and with an oxygen containing gas in the presence of a catalyst, resulting in water and an aromatic carboxylic acid ester of formula ROC(═O)R(II), wherein Ris an aryl group originating from the aromatic non-hydroxy compound; and (ii) contacting the aromatic carboxylic acid ester of formula (II) from step (i) with a dialkyl carbonate of formula ROC(═O)OR(III), wherein Rand Rare the same or different and are alkyl groups, in the presence of a catalyst, resulting in a diaryl carbonate of formula ROC(═O)OR(IV) and an alkyl carboxylic acid ester of formula ROC(═O)R(V), wherein Ris Ror R.