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

1.主要介绍了以30%浓度的双水作为硫脲、氨基硫脲来制备相的脲和氨基脲类合物。

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2.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.

2.基乙酸的合成工艺进行了比较研究,认为硫氢钠法和硫代硫酸钠法生产成本低,适宜于选矿用基乙酸的生产,而硫脲法可得到较高浓度的基乙酸。

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heptamerous, heptameter, heptamethylene, heptamide, heptaminol, heptamul, heptamycin, heptanal, heptandiol, heptandrian,

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3G, 401(K), a,

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