Patent · US Expired

Process for the preparation of N-sulfoalkyl quaternary salts of nitrogen heterocyclics

US4504668A · kind A · utility

2Cited by

2References

9Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Helmut Kampfer · Idar-Oberstein, DE
Marie Hase · Wittlich, DE
Max Glass · Cologne, DE

Key dates

Filing date	Mar 11, 1981
Grant date	Mar 12, 1985
Priority date	—
Expiry date	Mar 11, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09B23/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Tertiary amines may be quaternized by heating them with a sulfoalkylating agent of this invention to a temperature of from 100.degree. to 250.degree. C. The sulfoalkylating agents which are believed to be hydroxy alkane sulfonic acid sulfoalkyl esters are free from sultone and are prepared by heating a hydroxy alkane sulfonic acid of propane or butane or the corresponding sultone to a temperature in the region of from 80.degree. to 180.degree. C. in the presence of water in an amount of 1 to 4 moles per mole of hydroxy alkane sulfonic acid or alkane sultone.

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