侯氏法中 B 母液和 C 母液的循环关系,是该法中的一个重要组成部分。碱厂和氮肥厂的联合生产,也是建立在这个基础上的,这是侯氏法最突出的优点之一。因此,在说明侯氏法的优越性时,B母液和 C 母液循环关系的交代,以及它如何充分发挥了食盐的利用率和制出珍贵的氯化铵肥料,这就是重要关键。但在东北版高中化学课本(1952年10月出版)上,只作了简单的交代,并没有实验的证明或理论的依据。至于为什么在 B 母液中加入食盐的细粉, Hou’s method in the B mother liquor and C mother liquor cycle relationship is an important part of the law. The joint production of soda plants and nitrogenous fertilizer plants is also based on this foundation, which is one of the most prominent advantages of Hou’s method. Therefore, in explaining the superiority of Hou’s method, it is of crucial importance to account for the cycling relationship between mother liquor B and mother liquor C, and how it can give full play to salt utilization and produce precious ammonium chloride fertilizers. However, in the northeast version of high school chemistry textbook (published in October 1952), only made a simple explanation, and no experimental evidence or theoretical basis. As for why B salt in the mother liquor by adding salt,