提出一种新的合成巯基乙酸的方法，即铁还原法。

This article presents a new synthetic method of Thioglycolic Acid - reducing method of iron.

实验结果表明光还原法更能有效快速地裂解三硫酯键。

The results showed that the photoreduction is a more rapid and efficient that can cleave the trithiocarbonate.

肼解还原法是三种方法中产率最高，选择性最好的方法。

Hydrozinolysis and hydrogenolysis reduction with high yield and excellent selectivity was the best process among the three.

试验数据表明，加氢法比铁粉还原法的产品质量好，且在环保方面有优势。

The hydrogenation process has the more advantages on environment protection than iron powder method, and has better quality.

以硫铁矿烧渣为原料，采用机械活化硫铁矿还原法制备绿矾具有成本低、反应快、产品质量高等优点。

Copperas prepared by a reduction method of mechanically activated pyrite from pyrite cinder is featured by low cost, fast reaction speed and high quality.