Process for preparation of sulphonates
AssigneeExxon Chemical Patents Inc.
InventorsKenneth Alcock, Jeremy Roger Spencer, Christopher John Adams
Life of this patent
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Abstract
Sulphonates are prepared by the neutralization 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 water/diluent mixture; the reaction mixture is basic throughout the additions of acid and at least until the point of completion of the neutralization 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 utilized in the manufacture of the product.
Claims12
A method for the production of basic or neutral sulphonates comprising the addition of a sulphonic acid to a dispersion of a basic hydroxide or oxide in a water/diluent mixture to form a reaction mixture, wherein the sulphonic acid addition is made in at least two distinct stages and such that the reaction mixture remains basic throughout the addition of the acid and at least until the point of completion of the neutralisation reaction.
Dependencies are inferred from the claim text.