Preparation of color-stable, light-colored, aqueou

专利名称：Preparation of color-stable, light-colored,

aqueous salt pastes of wash- active, &agr;-sulfofatty acid esters

发明人：Dietrich Kloetzer,Karl-Heinz Linde,Klaus

Ojust

申请号：US06/604100申请日：19840426公开号：US047318A公开日：19851015

摘要：This invention is directed to a process for the preparation of color- stable, light-colored aqueous salt pastes of wash-active esters of &agr; -sulfofatty acids withmonohydric C.sub.1 -C.sub.8 -alcohols by a combined bleaching treatment of dark-colored &agr;-sulfofatty acid ester salt paste with hydrogen peroxide and alkali metalhypochlorite. According to the process, dark-colored &agr;-sulfofatty acid ester saltpaste is first subjected in a preliminary bleaching step to bleaching with alkali metalhypochlorite in a neutral to mildly alkaline aqueous medium, any excess metal

hypochlorite is removed, and the paste is subjected in a final bleaching step to bleachingin a mildly acidic medium with hydrogen peroxide or with one or more compounds whichyield hydrogen peroxide.

申请人：HENKEL KGAA

代理人：Ernest G. Szoke,Nelson Littell, Jr.,Henry E. Millson, Jr.

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