Patent · US Expired

Dewatering and purification of crude pyrrolidine

US6353118B1 · kind B1 · utility

0Cited by

2References

6Claims

0Family size

Assignee

BASF SE

Inventors

Joachim Simon · Grevenbroich, DE
Peter Wahl · Ladenburg, DE
Willi Schmidt · Ludwigshafen, DE

Key dates

Filing date	Nov 20, 2000
Grant date	Mar 5, 2002
Priority date	—
Expiry date	Nov 20, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D295/023
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In a process for purifying crude pyrrolidine to give a pyrrolidine composition comprising more than 99% (m/m) of pyrrolidine and less than 0.3% (m/m) of water, crude pyrrolidine comprising from 40 to 98% (m/m) of pyrrolidine and having a water content of more than 2% (m/m) is subjected to continuous distillation at a pressure at the top of less than 950 hPa in a column having a stripping section and a rectifying section.

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