Patent · US Expired

Coproduction of 6-aminocapronitrile and hexamethylenediamine

US5874607A · kind A · utility

5Cited by

1References

8Claims

0Family size

Assignee

BASF SE

Inventors

Werner Schnurr · Herxheim, DE
Guido Voit · Freinsheim, DE
Klemens Flick · Herxheim, DE
Rolf Fischer · Heidelberg, DE

Key dates

Filing date	Apr 22, 1996
Grant date	Feb 23, 1999
Priority date	—
Expiry date	Apr 22, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the coproduction of 6-aminocapronitrile (ACN) and hexamethylenediamine (HMD) by treatment of adiponitrile (ADN) with hydrogen in the presence of a nickel-containing catalyst at temperatures not below room temperature and elevated hydrogen partial pressure in the presence or absence of a solvent comprises, after the conversion based on ADN and/or the selectivity based on ACN has or have dropped below a defined value PA1 (a) interrupting the treatment of ADN with hydrogen by stopping the feed of ADN and of the solvent, if used, PA1 (b) treating the catalyst at from 150.degree. to 400.degree. C. with hydrogen using a hydrogen pressure within the range from 0.1 to 30 MPa and a treatment time within the range from 2 to 48 h, and PA1 (c) then continuing the hydrogenation of ADN with the treated catalyst of stage (b).

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