Process for the preparation of sulphonates

Details Process for the preparation of sulphonates Process for the preparation of sulphonates

1997-04-08

1998-08-04

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

252354, C07C30302, C07C30931

Patent

active

057896151

ABSTRACT:
Sulphonates are prepared by the neutralisation of a sulphonic acid with a basic hydroxide or oxide. The process requires the staged addition of sulphonic acid to a reaction mixture comprising basic hydroxide or oxide dispersed in a water/diluent mixture; the reaction mixture is basic throughout the additions of acid and at least until the point of completion of the neutralisation reaction. The basic hydroxide or oxide may also be added in stages. The sulphonate product has low viscosity, low haze and good stability and is essentially chloride free as halide promoters are not utilised in the manufacture of the product.

REFERENCES:
patent: 4279837 (1981-07-01), Wellbrock
patent: 4891155 (1990-01-01), Fernley et al.
Soviet Inventions Illustrated, CH Section, week 8724 (Jul. 29, 1987) Derwent Publications, London SU-A-1266 469.
Abstract entitled "Prodn. of over: based calcium sulphonate lubricant additives--with two-stage addn. of calcium hydroxide," Soviet Inventions Illustrated, Section Ch: Petroleum, week 8724, 29 Jul. 1987, SU-1266 469-A (Exxon Res & Eng Co.) p. 9.

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