This thesis mainly introduced that ureas and semicarbazides were synthesized by oxidation of corresponding thioureas and thiosemicarbazides using 30% peroxide as oxidant.

本文主要介绍了以30%浓度双为化剂化硫脲、氨基硫脲来制备相脲和氨基脲类化物。

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.

本文对巯基乙成工艺进行了比较研究,认为硫氢化钠法和硫代硫钠法生产成本低,适宜于选矿用巯基乙生产,而硫脲法可得到较高浓度巯基乙。