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    • 31. 发明授权
    • Process for the preparation of sulpho-free triphenyl-methane dyestuffs
    • 无磺基三苯基甲烷染料的制备方法
    • US5013857A
    • 1991-05-07
    • US449035
    • 1989-12-11
    • Horst BernethRoderich Raue
    • Horst BernethRoderich Raue
    • C09B11/00C09B11/12C09B11/18
    • C09B11/18
    • Process for the preparation of sulpho-free triphenylmethane dyestuffs of the formula ##STR1## in which R.sup.1 -R.sup.3 denote hydrogen, C.sub.1 -C.sub.6 -alkyl, preferably methyl, or halogen, preferably chlorine,Y denotes hydrogen or NX.sup.5 X.sup.6,X.sup.1 -X.sup.6 denote hydrogen, C.sub.1 -C.sub.6 -alkyl, preferably methyl, ethyl, benzyl or phenyl andZ.sup.- denotes an anionby oxidation of their leuco products with manganese dioxide, characterized in that, after the oxidation is completed, manganese hydroxide or manganese carbonate and the carbinol base of the dyestuff are formed by the addition of hydroxide or carbonate, during or after which the carbinol base is taken up in a water-immiscible solvent, separated off from the manganese hydroxide or manganese carbonate and from the water phase, the solution is mixed with the acid HZ which may have been mixed with water, the solvent is either distilled off before the mixing or separated or distilled off after the mixing, and the dyestuff is isolated as a solution or in solid form after evaporation or crystallization.
    • 制备式“IMAGE”的无磺酸三苯甲烷染料的方法,其中R1-R3表示氢,C1-C6-烷基,优选甲基或卤素,优选氯,Y表示氢或NX5X6,X1-X6表示氢 ,C 1 -C 6 - 烷基,优选甲基,乙基,苄基或苯基,Z-表示阴离子,其用二氧化锰氧化其无色产物,其特征在于氧化完成后,将氢氧化锰或碳酸锰和甲醇基 通过加入氢氧化物或碳酸酯形成染料,在此期间或之后,将甲醇碱溶解在与水相混溶的溶剂中,从氢氧化锰或碳酸锰和水相中分离出来,将溶液与 可能已经与水混合的酸性HZ,在混合之前将溶剂蒸馏出来,或者在混合后分离或蒸馏出去,并将染料作为溶液或以固体形式分离出来 配给或结晶。