| abstract |
PCT No. PCT/EP91/01526 Sec. 371 Date Feb. 18, 1993 Sec. 102(e) Date Feb. 18, 1993 PCT Filed Aug. 10, 1991 PCT Pub. No. WO92/03406 PCT Pub. Date Mar. 5, 1992.A process for reducing the residual content of free alkylating agent in aqueous solutions of cationic surfactants comprising aftertreating the solutions with at least one of the following amine compounds: a) ammonia; b) tertiary amine corresponding to the general formula (I) <IMAGE> (I) in which R1, R2 and R3 independently of one another represents linear or branched, optionally hydroxy-substituted alkyl radicals containing 1 to 18 carbon atoms or an alkenyl radical containing 8 to 18 carbon atoms; c) amino acids containing 2 to 8 carbon atoms; and d) oligopeptides having an average molecular weight of about 500 to about 5000, at an elevated temperature. |