Recovery process for waste zinc ions in viscose production
A technology of viscose fiber and zinc ions, which is applied in the field of recovery process of waste zinc ions in the production of viscose fiber, can solve the problems of zinc waste and environmental pollution, and achieve the effect of effective recovery
Active Publication Date: 2018-04-13
YIBIN HIEST FIBER +1
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The invention provides a recovery process for waste zinc ions in viscose production. The recovery process comprises the following steps: 1, viscose wastewater treatment: a step of adding lime powder into viscose production wastewater, and carrying out a reaction so as to obtain a precipitate; 2, adding a sulfuric acid solution into the precipitate obtained in the step 1, and carrying out dissolving and filtering so as to obtain a filtrate I; 3, adding sodium hydroxide into the filtrate I obtained in the step 2 until the pH value of the filtrate I is 7 to 14, and after completion of a reaction,carrying out filtering so as to obtain a filtrate II; 4, adjusting the filtrate II to acidity by using a sulfuric acid solution, and allowing macroporous chelated divinyl benzene polymerized ion-exchange resin to adsorb zinc ions in the filtrate II; and 5, rinsing the macroporous chelated divinyl benzene polymerized ion-exchange resin which adsorbs the zinc ions in the filtrate II in the step 4 by adopting a sulfuric acid solution so as to obtain a zinc sulfate eluent and complete recovery of waste zinc ions. The process provided by the invention has simple operation, can effectively recoverthe zinc ions in the precipitate formed in zinc-containing wastewater treatment, and reduce environmental pollution.
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