Method for purifying ammonium thiocyanate and sodium thiocyanate products extracted in coking desulfurization waste liquid
A technology of coking desulfurization waste liquid and ammonium thiocyanate, applied in the direction of thiocyanate, etc., can solve the problems of low product purity, failure to reach the purity of sodium thiocyanate, high production risk, etc., and achieve good purification effect and process Effects in simple steps
CN109796030AInactive Publication Date: 2019-05-24扬州康龙环保工程有限公司
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Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- Publication Date
- 2019-05-24
- Estimated Expiration
- Not applicable · inactive patent
Abstract
The invention discloses a method for purifying ammonium thiocyanate and sodium thiocyanate products extracted in coking desulfurization waste liquid and belongs to the technical field of chemical environment protection. The method includes: dissolving and filtering crude products- ammonium thiocyanate and sodium thiocyanate extracted from the coking desulfurization waste liquid, utilizing an ultrafiltration membrane system to finely filter obtained filtrate, and subjecting penetrating liquid to obtain concentration and separation to obtain high-purity ammonium thiocyanate and sodium thiocyanate products. The method is simple in process step, good in purifying effect and capable of improving purity of the ammonium thiocyanate and sodium thiocyanate products to 98-99% to meet quality required by end customers.
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