Process for the preparation of tenside mixtures

Details Process for the preparation of tenside mixtures Process for the preparation of tenside mixtures

C - Chemistry, Metallurgy

11

D

C11D 11/04 (2006.01) C11D 1/14 (2006.01) C11D 1/83 (2006.01)

Patent

CA 2176922

The object of the present invention is a process for preparing a tenside mixture according to which contains an alkali metal salt of alkyl sulfonic acid, and optionally an alkali metal salt of ethoxylated alkyl sulfate is treated with an excess of concentrated sulfuric acid so that the temperature of the mixture does not exceed aprr. 35 °C, the reaction mixture is let to separate into two layers, the layer containing organic acids is separated and neutralised with di- and/or triethanolamine in order to prepare the di and/or triethanolamine in order to prepare the di- and/or triethanolamine salts of the said acids, and optionally water and convential additional agents and adjuvents are added. The starting mixture can, according to an advantageous embodiment, contain also other tensides and additional components.

L'invention concerne un procédé, qui permet de préparer un mélange de dérivés tensio-actifs, selon lequel un mélange, qui contient un sel de métal alcalin d'un acide alkyle sulfonique et à titre facultatif un sel de métal alcalin d'un sulfate d'alkyle éthoxylé, est traité avec un acide sulfurique concentré excédentaire de façon que la température de ce mélange ne dépasse pas 35 DEG C environ. On laisse le mélange de réaction se scinder en deux couches et celle qui contient des acides organiques est séparée et neutralisée avec di- et/ou triéthanolamine pour préparer des sels de di- et/ou triéthanolamine de ces acides, et on ajoute, à titre facultatif, de l'eau et des agents ou adjuvants complémentaires traditionnels. Selon une variante avantageuse, le mélange de départ peut aussi contenir d'autres dérivés tensio-actifs ou composants complémentaires.

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