Method for recycling and preparing hafnium oxide from hafnium-containing waste material
The invention discloses a method for recycling and preparing hafnium oxide from a hafnium-containing waste material. The method comprises the following steps: 1, adding the hafnium-containing waste material into a mixed liquor of hydrofluoric acid and hydrogen nitrate, and dissolving, so as to obtai...
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| creator | WU YONGQIAN ZHOU MINGSHU ZHENG JING YANG YANG CAO QIGAO CHEN KUNKUN ZHANG BUSHENG |
| description | The invention discloses a method for recycling and preparing hafnium oxide from a hafnium-containing waste material. The method comprises the following steps: 1, adding the hafnium-containing waste material into a mixed liquor of hydrofluoric acid and hydrogen nitrate, and dissolving, so as to obtain a dissolving solution; 2, adding ammonium hydroxide into the dissolving solution, and heating andstirring, so as to obtain precipitation sludge; 3, adopting hydrogen nitrate for dissolving the precipitation sludge to obtain a leaching solution; 4, adopting cation exchange resin for adsorbing theleaching solution to obtain loaded resin; 5, adopting hydrogen nitrate for drip washing the loaded resin to remove impurity elements; 6, adopting sulfuric acid for desorbing hafnium to obtain a hafnium desorption solution; 7, adopting ammonium hydroxide for precipitating the hafnium desorption solution to obtain hydroxide precipitate of hafnium; and 8, heating the hydroxide precipitate of hafniumto obtain hafnium oxide. Ac |
| format | Patent |
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The method comprises the following steps: 1, adding the hafnium-containing waste material into a mixed liquor of hydrofluoric acid and hydrogen nitrate, and dissolving, so as to obtain a dissolving solution; 2, adding ammonium hydroxide into the dissolving solution, and heating andstirring, so as to obtain precipitation sludge; 3, adopting hydrogen nitrate for dissolving the precipitation sludge to obtain a leaching solution; 4, adopting cation exchange resin for adsorbing theleaching solution to obtain loaded resin; 5, adopting hydrogen nitrate for drip washing the loaded resin to remove impurity elements; 6, adopting sulfuric acid for desorbing hafnium to obtain a hafnium desorption solution; 7, adopting ammonium hydroxide for precipitating the hafnium desorption solution to obtain hydroxide precipitate of hafnium; and 8, heating the hydroxide precipitate of hafniumto obtain hafnium oxide. 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The method comprises the following steps: 1, adding the hafnium-containing waste material into a mixed liquor of hydrofluoric acid and hydrogen nitrate, and dissolving, so as to obtain a dissolving solution; 2, adding ammonium hydroxide into the dissolving solution, and heating andstirring, so as to obtain precipitation sludge; 3, adopting hydrogen nitrate for dissolving the precipitation sludge to obtain a leaching solution; 4, adopting cation exchange resin for adsorbing theleaching solution to obtain loaded resin; 5, adopting hydrogen nitrate for drip washing the loaded resin to remove impurity elements; 6, adopting sulfuric acid for desorbing hafnium to obtain a hafnium desorption solution; 7, adopting ammonium hydroxide for precipitating the hafnium desorption solution to obtain hydroxide precipitate of hafnium; and 8, heating the hydroxide precipitate of hafniumto obtain hafnium oxide. Ac</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Method for recycling and preparing hafnium oxide from hafnium-containing waste material |
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