Patent · US Active

Process for the preparation of a mono-N-alkylpiperazine

US8927712B2 · kind B2 · utility

1Cited by

23References

34Claims

0Family size

Assignee

BASF SE

Inventors

Roland Bou Chedid · Mannheim, DE
Johann-Peter Melder · Schifferstadt, DE
Ulrich Abel · Schifferstadt, DE
Roman Dostalek · Neuleiningen, DE
Bernd Stein · San Diego, US

Key dates

Filing date	May 31, 2013
Grant date	Jan 6, 2015
Priority date	—
Expiry date	May 31, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2523/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Process for the preparation of a mono-N-alkylpiperazine of the formula Iin which R1 is C1- to C5-alkyl or 2-(2-hydroxyethoxy)ethyl,by reacting diethanolamine (DEOA) of the formula IIwith a primary amine of the formula H2N—R1 (III) in the presence of hydrogen and a catalyst molding, where the reaction is carried out in the liquid phase at an absolute pressure in the range from 150 to 250 bar and the amination is carried out by means of a catalyst molding, the precursor of which can be prepared according to a process in which

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