hydrosulphide

英

美

网络氢硫化物

The methods of improving the selectivity of the synthesis of thioglycolic acid with sodium hydrosulphide
提高硫氢化钠法合成巯基乙酸选择性的方法
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.
本文对巯基乙酸的合成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成本低，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。
The main matter that causes the low ratio of yield in synthesis of thioglycolic acid with sodium hydrosulphide is that it has many auxiliary reactions during reaction course.
副反应多导致硫氢化钠法生产巯基乙酸过程中巯基乙酸收率低。
This paper studies the causes that cause these side-reactions with thermodynamic methods, using relevant conditions of technology to prevent them from happening, thus improving the selectivity of synthesis with sodium hydrosulphide methods.
利用热力学理论研究了发生这些副反应的原因，并提出予以防止的工艺条件，以提高硫氢化钠法的选择性。