Patent · US Expired

Manufacture of hexamethylene diamine

US3972938A · kind A · utility

7Cited by

11References

5Claims

0Family size

Assignee

BASF SE

Inventors

Dieter Voges
Leopold Hupfer · Friedelsheim, DE
Siegfried Winderl
Karl Wilhelm Leonhard
Herwig Hoffmann · Bischofswerda, DE

Key dates

Filing date	Mar 11, 1974
Grant date	Aug 3, 1976
Priority date	—
Expiry date	Mar 11, 1994

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C209/48
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the catalytic hydrogenation of adiponitrile in the presence of ammonia, in which a portion of the reaction mixture is recycled and specific molar ratios of adiponitrile and ammonia are maintained.

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