Method for producing ethers, esters or acid anhydrides

Details Method for producing ethers, esters or acid anhydrides Method for producing ethers, esters or acid anhydrides

2005-11-15

2005-11-15

Zucker, Paul A. (Department: 1621)

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

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

06965047

ABSTRACT:
Ethers, esters or acid anhydrides are advantageously obtained when a cake of a first reactant selected from salts of organic or oxygen-containing inorganic acids or alkoxides disposed on a filter element is flowed through by a solution of a second reactant selected from inorganic or organic acid halides and alkyl halides, so that the insoluble halide salt formed remains on the filter element. The halide salt can thus be removed substantially quantitatively in a simple manner.

REFERENCES:
patent: 6818793 (2004-11-01), Wulff et al.
patent: A 3 129 379 (1983-02-01), None
patent: 1 240 173 (2003-05-01), None
patent: WO03/020411 (2003-03-01), None
Bollmacher et al., Chemiker—Zeitung 107 (1983), No. 4, pp. 121-126.

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