Continuous catalyzed vapor phase dimeric cyclic ester process

Details Continuous catalyzed vapor phase dimeric cyclic ester process Continuous catalyzed vapor phase dimeric cyclic ester process

1990-06-28

1992-08-11

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549267, 549296, 549319, C07D31912, C07D32100

Patent

active

051380749

ABSTRACT:
A continuous catalyzed vapor phase process for the production of dimeric cyclic esters which comprises converting the corresponding alpha-hydroxy-carboxylic acid or ester in the vapor phase over a solid catalyst, such as a silica-alumina, preferably a silica-alumina having a high silica content, in the presence of a carrier of gas.

REFERENCES:
patent: 1095205 (1914-05-01), Gruter et al.
patent: 2668162 (1954-02-01), Lowe
patent: 4835294 (1989-05-01), Seebach et al.

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