Ammonium thiocyanate is extracted from coking desulfurization waste liquor

Ammonium thiocyanate is extracted from coking desulfurization waste liquor

  • CN 102,874,845 B
  • Filed: 10/15/2012
  • Issued: 03/30/2016
  • Est. Priority Date: 10/15/2012
  • Status: Active Grant
First Claim
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1. one kind is extracted the method for ammonium thiocyanate from coking desulfurization waste liquor, its step is as follows:

  • mixed salt coking desulfurization waste liquor evaporating water being obtained ammonium thiocyanate, ammonium thiosulfate and ammonium sulfate, after mixed salt stacks 3 months, saturated ammonium sulphate solution when mixed salt per ton adds 0.10-0.15 cubic meter room temperature, heat to 70-80 DEG C, stir 15-30 minute, filter under maintaining the temperature at 70-80 DEG C of condition, continue after filtrate cool to room temperature to place 3-5 hour, filter, filtrate is the ammonium thiocyanate crystal of 86-94w%;

    Every cubic metre of filtrate adds mixed salt 0.8-1.2 ton again, heats to 70-80 DEG C, stirs 15-30 minute, filters under maintaining the temperature at 70-80 DEG C of condition, and continue after filtrate cool to room temperature to place 3-5 hour, filter, filtrate is the ammonium thiocyanate crystal of 86-94w%;

    Every cubic metre of filtrate adds mixed salt 0.8-1.2 ton, cyclical operation like this again.

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