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

正庚醛、硫代硫酸钠和溴代正丁烷为原,了正庚醛正丁硫醇缩醛。

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

硫代硫酸钠标准溶液漓定,淀粉显色为指示剂,可测定铁含。

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

经比较,硫代硫酸钠大,生物对环境没有影响,为首选剂。

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.

本文对巯基乙酸的工艺进行了比较研究,认为硫氢化钠法和硫代硫酸钠法生产本低,适宜于选矿用巯基乙酸的生产,而硫脲法可得到较高浓度的巯基乙酸。