Patent · US Expired

Process for the production of pure tetrazole-1-acetic acid

US3932441A · kind A · utility

0Cited by

0References

5Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Gunter Bison · Troisdorf, DE
Walter Heinzelmann · Odenthal, DE
Norbert Linkat
Wolfgang Wolfes · Niederkassel, DE

Key dates

Filing date	Sep 27, 1974
Grant date	Jan 13, 1976
Priority date	—
Expiry date	Sep 27, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D257/04
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for producing tetrazole-1-acetic acid of maximum purity includes the steps of providing a crude reaction product containing an alkyl ester of tetrazole-1-acetic acid having from 1 to 4 carbon atoms in the alkyl group, effecting molecular distillation of this reaction product at a temperature below 130.degree.C. under a vacuum of 10.sup.-.sup.1 torr to obtain a distillant containing the alkyl ester and then gently hydrolyzing the resultant distillate to obtain the desired acid product.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.