The heptanal butyl mercaptal was synthesized with heptanal, sodium thiosuifate and 1bromobutane as raw materials.

以庚醛、代酸钠和溴代烷为原料,合成了庚醛醇缩醛。

With sodium hyposulphite standard solution used in titration and starch developing agent as indicator,iron content can be determined.

以代酸钠标准溶液漓定,以淀粉显色为指示剂,可测定铁含量。

After comparison,sodium hyposulfite is the preferred absorbent,which the resultant has no influence on the environment with sodium hyposulfite over absorbed dose.

比较,代酸钠吸收量大,生成物对环境没有影响,为首选吸收剂。

Using sodium hydrosulphide or sodium thiosulfate as materials,the production cost of TGA is low.While,a high content of TGA can be obtained with thiourea as reactant.

本文对酸的合成工艺进行了比较研究,认为氢化钠法和代酸钠法生产成本低,适宜于选矿用酸的生产,而脲法可得到较高浓度的酸。