Patent · US Expired

Continuous preparation of N-acylamino carboxylic acids and N-acylamino sulphonic acids, and their alkali metal salts

US5942635A · kind A · utility

2Cited by

6References

4Claims

0Family size

Assignee

BASF SE

Inventors

Beate Ehle · Ludwigshafen, DE
Georg Schuh · Ludwigshafen, DE
Martin aus dem Kahmen · Ludwigshafen, DE
Dieter Hertel · Leimen, DE

Key dates

Filing date	Apr 30, 1998
Grant date	Aug 24, 1999
Priority date	—
Expiry date	Apr 30, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C231/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

In a process and an apparatus for the continuous preparation of N-acylamino carboxylic acids and N-acylamino sulfonic acids, and their alkali metal salts, from the alkali metal salts of amino carboxylic acids and amino sulfonic acids, respectively, and carbonyl halides in a reactor designed as circulating circuit, the reactants are fed for immediate reaction into the circulating circuit, and a part of the product solution corresponding to the amount fed in is continuously discharged from the circulating circuit. The reactants are circulated by a circulating pump. The temperature in the reactors is controlled. The heat produced in the reaction is removed.

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