Process for the reductive cleavage of linear and cyclic acetals especially formals
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United States of America Patent
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Jul 24, 2001
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N/A
app pub date -
Aug 26, 1999
filing date -
Sep 4, 1998
priority date (Note) -
Expired
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Abstract
The reductive cleavage of linear and cyclic acetals, especially formals, in an aqueous medium containing a formate takes place by hydrogenation with hydrogen in the presence of a heterogeneous hydrogenation catalyst at a pH value of less than 7 at a temperature of over 200.degree. C. The catalyst-poisoning effect of the formate is overcome at over 200.degree. to 300.degree. C., especially from over 200.degree. to 280.degree. C., so that, in a suspension procedure, the weight ratio of metal having hydrogenating activity to acetal is less than 0.1.
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