Process for preparing sulfosuccinates
AssigneeREWO Chemische Werke GmbH
InventorsMichael Bloch, Ronald Peter Inglis, Adolf Koebner
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Abstract
A process for preparing salts of mono-esters of sulfosuccinic acid in which maleic acid, fumaric acid or maleic anhydride, especially maleic anhydride, is reacted with a fatty alcohol, an alkoxylated fatty alcohol or a fatty acid alkanolamide; and the butenedioic acid half ester so obtained is reacted with a finely powdered crystalline sulfite of an alkali or alkaline earth metal, by mechanically mixing and butenedioic acid half ester with said sulfite in the absence of water other than that present as water of crystallization in the crystalline sulfite, to yield the desired salt of a mono-ester of sulfosuccinic acid in a solid granular form.
Claims22
A process for preparing salts of mono-esters of sulfosuccinic acid in which:
- (A) an acid reactant, selected from the group consisting of maleic acid, fumaric acid and maleic anhydride and mixtures thereof,
- is reacted at a temperature of 60.degree.-150.degree. C.
- with an alcoholic reactant selected from the group consisting of fully saturated aliphatic alcohols containing in each molecule 6-18 carbon atoms, ethylenically unsaturated aliphatic alochols containing in each molecule 6-18 carbon atoms and 1-2 ethylenic linkages, alkoxylated aliphatic alcohols containing in each molecule a hydrocarbon radical containing 6-18 carbon atoms and selected from the group consisting of fully saturated hydrocarbon radicals and ethylenically unsaturated hydrocarbon radicals containing 1-2 ethylenic linkages, and said alkoxylated aliphatic alcohols containing in each molecule also 1-10 alkoxy radicals each of which is selected from the group consisting of oxyethylene radicals and oxypropylene radicals, acyl alkanolamides represented by the formula R.CONH.X.OH where R contains 6-18 carbon atoms and is selected from the group consisting of saturated hydrocarbon radicals, ethylenically unsaturated hydrocarbon radicals containing 1-2 ethylenic linkages, mono-hydroxy-substituted saturated hydrocarbon radicals and mono-hydroxy-substituted ethylenically unsaturated hydrocarbon radicals containing 1-2 ethylenic linkages, and where X is a hydrocarbon radical containing 1-4 carbon atoms, and mixtures thereof,
- the amounts of said acid and alcoholic reactants being in the ratio of 0.8-1.2 gram molecules of said acid reactant to 1.0 gram molecule of said alcoholic reactant
- so as to form a butenedioic acid half ester;
- and in which thereafter
- (B) said butenedioic acid half ester is reacted with a finely powdered crystalline sulfite reactant containing water of crystallisation
- said crystalline sulfite reactant being selected from the group consisting of crystalline hydrated alkali metal sulfites, crystalline hydrated alkaline earth metal sulfites, and mixtures thereof,
- the amounts of said butenedioic acid half ester and of said crystalline sulfite reactant being in the proportion of 0.8-1.2 gram molecules of said butenedioic acid half ester to 1.0 gram molecule of said crystalline sulfite reactant
- the reaction being effected by mechanically mixing said butenedioic acid half ester with said crystalline sulfite reactant at a temperatureof 30.degree.-100.degree. C.
- so as form the salt of the mono-ester of sulfosuccinic acid.
Dependencies are inferred from the claim text.