Method for treatment of waste nitric acid from etching zinc plate

Method for treatment of waste nitric acid from etching zinc plate

The processing method includes: standing still waste nitric acid produced from etching zinc plate to separate organic solvent and water phase solution, adding barium carbonate or barium hydroxide, and adjusting to pH 5-6, thus producing precipatated barium nitrate and zinc nitrate, after evaporation...

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1. Verfasser: CONG RISHENG
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Sprache:eng
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CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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creator CONG RISHENG
description The processing method includes: standing still waste nitric acid produced from etching zinc plate to separate organic solvent and water phase solution, adding barium carbonate or barium hydroxide, and adjusting to pH 5-6, thus producing precipatated barium nitrate and zinc nitrate, after evaporation, concentration, centrifugal separation to remove water, and drying by infrared dryer, thus obtaining a mixture of zinc nitrate and barium nitrate, which are oxidizers and generate oxygen when heating, so that they can be used as a combustion supporting agent.
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METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
title Method for treatment of waste nitric acid from etching zinc plate
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