PROCESS FOR PRODUCING HIGHLY CONCENTRATED PASTES OF (ALPHA)-SULPHO FATTY ACID ALKYL ESTER ALKALI METAL SALTS
In the production of highly concentrated pastes of $g(a)-sulpho fatty acid alkyl ester alkali metal salts by reacting fatty acid alkyl esters with gaseous SO3?, followed by additional reaction in liquid phase and neutralization with aqueous alkali hydroxide solutions, the sulphonation product and aq...
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Main Authors | , , , , |
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Format | Patent |
Language | English German |
Published |
12.12.1991
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Subjects | |
Online Access | Get full text |
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Summary: | In the production of highly concentrated pastes of $g(a)-sulpho fatty acid alkyl ester alkali metal salts by reacting fatty acid alkyl esters with gaseous SO3?, followed by additional reaction in liquid phase and neutralization with aqueous alkali hydroxide solutions, the sulphonation product and aqueous alkali metal hydroxide solution are introduced during neutralization into an aqueous phase initially containing 0 to 55 wt.% of washing-active substance, while maintaining the pH between 2 and 8, and the content of washing-active substance is adjusted to 60 to 70 wt.%.
Pour produire des pâtes très concentrées de sels de métaux alcalins-alkylesters d'acides gras alpha-sulfonés, on fait réagir des alkylesters d'acides gras avec du SO3 gazeux, on les fait réagir ultérieurement dans la phase liquide et on les neutralise avec des solutions aqueuses d'hydroxydes alcalins. Pendant la neutralisation, on introduit le produit de sulfonation et la solution aqueuse d'hydroxyde de métaux alcalins, en maintenant le pH dans une plage comprise entre 2 et 8, dans une phase aqueuse qui contien au début entre 0 et 55 % en poids de substance détergente, puis on ajuste la teneur en substance détergente entre 60 et 70 % en poids. |
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Bibliography: | Application Number: WO1991EP00942 |