| abstract |
The invention discloses a novel method for synthesizing B naphthalene disulfonic acid ammonium milk bile, wherein, lactic acid and 1, 5-naphthalene disulfonic acid are used as original raw materials which are salified after esterification, acylation, and methyl ester reactions; B naphthalene disulfonic acid ammonium milk bile is then directly and continuously synthesized; separation and purification need not to be carried out on the reaction intermediate in each step. The preparing method has a scientific and reasonable process, a simple preparing process; the three wastes (waste water, waste gas, and waste solid) are reduced; simultaneously, cost is lowered; the method is suitable to industrialization production. |