Patent · US Expired

Process for the production of diamines

US4215073A · kind A · utility

4Cited by

2References

8Claims

0Family size

Assignee

Ruhrchemie Aktiengesellschaft · DE

Inventors

Boy Cornils · Dinslaken, DE
Werner Konkol · Oberhausen, DE
Gerhard Diekhaus · Oberhausen, DE
Ernst Wiebus · Oberhausen, DE

Key dates

Filing date	May 30, 1979
Grant date	Jul 29, 1980
Priority date	—
Expiry date	May 30, 1999

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C2603/68
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A two-step process for the production of aliphatic or cycloaliphatic diamines having 4 to 18 carbon atoms is disclosed wherein in the first step an aliphatic or cycloaliphatic dialdehyde is reacted with a monoamine olefin at atmospheric pressure at a temperature up to 100.degree. C. to form the corresponding diazomethyne and in the second step the diazomethyne is reacted at 60.degree. to 200.degree. C. and 50 to 300 bar with a mixture of ammonia and hydrogen in the presence of a hydrogenation catalyst to form the corresponding diamine and release of monoamine.

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