Patent · US Expired

Method for producing lactams using oligophosphate catalysts

US6407230B1 · kind B1 · utility

0Cited by

3References

7Claims

0Family size

Assignee

BASF SE

Inventors

Matthias Eiermann · Schifferstadt, DE
Andreas Ansmann · Wiesloch, DE
Klemens Flick · Herxheim, DE

Key dates

Filing date	Sep 14, 2000
Grant date	Jun 18, 2002
Priority date	—
Expiry date	Sep 14, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D213/61
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing lactams by hydrolytic cyclization of aminonitriles in the gas phase in the presence of a metal phosphate catalyst comprises using a catalyst comprising one or more oligophosphates of the general formula (I)M (POa)b  (I)where M is a metal of group 3 or 4 of the periodic table, including the lanthanides, a is >2.5 and <4.0, and b is such that electrical neutrality is ensured, or a mixture of one or more oligophosphates of the general formula (I) with one or more further salts of a metal of group 3 or 4 of the periodic table, including the lanthanides, with an inorganic acid.

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