Process for carbonylation of alkyl ethers

Details Process for carbonylation of alkyl ethers Process for carbonylation of alkyl ethers

2006-12-15

2008-12-16

Zucker, Paul A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C562S517000

Reexamination Certificate

active

07465822

ABSTRACT:
A product comprising a lower alkyl ester of a lower aliphatic carboxylic acid is produced by a process comprising reacting under substantially anhydrous conditions a lower alkyl ether with carbon monoxide in the presence of a zeolite catalyst having an 8-member ring channel which is interconnected with a channel defined by a ring with greater than or equal to 8 members, the 8-member ring having a window size of at least 2.5 Angstroms×at least 3.6 Angstroms and at least one Brønsted acid site and the zeolite having a silica:X2O3ratio of at least 5, wherein X is selected from aluminum, boron, iron, gallium and mixtures thereof.

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