Continuous prepn. of malic acid di:ester sulphate

摘要

In the continuous prepn. of malic acid diester sulphates of formula (I), malic acid diesters of formula (II) are reacted continuously with a sulphating agent, followed by neutralisation with an aq. base. R<1>-O-(CH2CH(R<3>)O)n-C(O)-CH(OSO3X)-CH2-C(O)-O-(CH2CH(R<3>)O)m-R<2> (I) R<1>-O-(CH2CH(R<3>)O)n-C(O)-CH(OH)-CH2-C(O)-O-(CH2CH(R<3>)O)m-R<2> (II) R<1>, R<2> = 6-22C alkyl with 0-3 C=C bonds; R<3> = H or Me; m, n = 0-20; and X = alkali(ne earth) or quat. ammonium gp..