Treatment method for resource recycling of hexavalent chromium-containing residues

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United States of America

PATENT NO 10569315
APP PUB NO 20190284661A1
SERIAL NO

16074104

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Abstract

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A treatment method for resource recycling of hexavalent chromium-containing residues is provided. This method comprises steps as follows: 1) adding water to the hexavalent chromium-containing residues and mixing uniformly; 2) adding mineralizers to a solution obtained in step 1) and stirring sufficiently to obtain a mixed liquid; and the mineralizers are sodium chlorate, sodium perchlorate and hydrochloric acid; 3) treating the mixed liquid by a hydrothermal method or direct heating; 4) after the heating treatment, naturally cooling a solid-liquid mixture to room temperature for holding; 5) separating solid residues and a chromium-containing supernatant, and washing filtered residues with water and then drying; and 6) recycling a chromium-containing solution for returning to a work section, or for a treatment of recycling chromium.

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Patent Owner(s)

  • SOUTH CHINA UNIVERSITY OF TECHNOLOGY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lin, Zhang Guangdong, CN 8 1
Liu, Weizhen Guangdong, CN 4 0
Liu, Xueming Guangdong, CN 7 0
Rong, Wencong Guangdong, CN 2 0

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