摘要
对钼酸铵与硫化氢反应合成四硫代钼酸铵、钨酸与硫化氢反应合成四硫代钨酸铵的方法进行了改进。结果表明，采用改进后的方法，反应时间分别为７小时和１１小时。比文献值￣［１１］缩短了许多。产率分别为９１．１％和５２．１％，均高于文献值￣［１］。
The synthetic processes for obtaining ammonium thiomolybdate by reaction of ammoniummolybdate with hydrogen sulphide,and ammonium thiotungstate by reaction of ammonium tungstate withhydrogen sulphide were improved.The results show that the reacting times are shortened to 7 and 11h.andtbe output rates are 91.1% and 51.1% respectively,These are all superior to the results reported in theliterature￣[1].
