Tungstate Mercury Producing

Tungstate mercury producing processes are as follows:
1.Weigh 0.01 ~ 0.02mol tungsten and mercury salts separately. On one hand, mercury salts and tungsten molar ratio is 1: 1. On the other hand, the mercury salts may be selected from HgCl2 or Hg (NO3) 2 in which tungsten may be selected Na2WO4, K2WO4 or H2WO4 one of them. Then place them in a 45ml autoclave with tetrafluoroethylene-lined, and then adding distilled water to 3/4 volume of autoclave.
2.Adding N2 into reaction solution to get rid of dissolved oxygen in reaction solution. After  sealed the autoclave and put it into oven heating at 140~200℃ for 2~12 hours. And after completion the reaction, closed the oven to reduce the temperature of autoclave by gradient.
3.Using the dropper to take the supernatant of the autoclave and the precipitation put into beaker. After ultrasonic treatment for 5 minutes to 6 hours and then stewing for 1 to 5 hours followed by centrifugation.
4.The resulting precipitate which was got by centrifugation washed with distilled water, acetone and ethanol for three times with separately, finally get mercury tungstate mercury.

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