Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components
Identifieur interne : 001857 ( Istex/Corpus ); précédent : 001856; suivant : 001858Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components
Auteurs : S. Stenström ; G. AlySource :
- Hydrometallurgy [ 0304-386X ] ; 1985.
Abstract
Cadmium can be effectively removed from wet-process phosphoric acid (WPA) by solvent extraction using long-chain amines, preferably tertiary amines, as extractants. Stripping can be performed either with water or with acids such as phosphoric or sulphuric acid depending on the final conversion of the cadmium waste. Scrubbing could be necessary in some cases and can be performed with alkali. A factorial design experiment was performed to determine the effects of four different components (H2SO4, HCl, HF, H2SiF6) in WPA on cadmium extraction with Alamine 336. The largest influence on cadmium extraction is seen for the hydrochloric acid, drastically increasing the distribution coefficient. Variations of the concentrations of H3PO4, HCl, HF, Fe and Al were also studied. The extraction of cadmium was seen to be strongly dependent on phosphoric acid concentration. A simple extraction model is proposed indicating that CdCl42− ions are extracted.
Url:
DOI: 10.1016/0304-386X(85)90035-0
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Stripping can be performed either with water or with acids such as phosphoric or sulphuric acid depending on the final conversion of the cadmium waste. Scrubbing could be necessary in some cases and can be performed with alkali. A factorial design experiment was performed to determine the effects of four different components (H2SO4, HCl, HF, H2SiF6) in WPA on cadmium extraction with Alamine 336. The largest influence on cadmium extraction is seen for the hydrochloric acid, drastically increasing the distribution coefficient. Variations of the concentrations of H3PO4, HCl, HF, Fe and Al were also studied. The extraction of cadmium was seen to be strongly dependent on phosphoric acid concentration. A simple extraction model is proposed indicating that CdCl42− ions are extracted.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>S. Stenström</name><affiliations><json:string>Lund Institute of Technology, Dept. of Chemical Engineering I, P.O. 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The largest influence on cadmium extraction is seen for the hydrochloric acid, drastically increasing the distribution coefficient. Variations of the concentrations of H3PO4, HCl, HF, Fe and Al were also studied. The extraction of cadmium was seen to be strongly dependent on phosphoric acid concentration. A simple extraction model is proposed indicating that CdCl42− ions are extracted.</abstract><qualityIndicators><score>6.704</score><pdfVersion>1.2</pdfVersion><pdfPageSize>468 x 684 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>952</abstractCharCount><pdfWordCount>11419</pdfWordCount><pdfCharCount>37532</pdfCharCount><pdfPageCount>25</pdfPageCount><abstractWordCount>142</abstractWordCount></qualityIndicators><title>Extraction of cadmium from phosphoric acid solutions with amines Part I. 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The extraction of cadmium was seen to be strongly dependent on phosphoric acid concentration.</ce:simple-para><ce:simple-para>A simple extraction model is proposed indicating that CdCl<ce:inf>4</ce:inf><ce:sup>2−</ce:sup> ions are extracted.</ce:simple-para></ce:abstract-sec></ce:abstract></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components</title></titleInfo><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Stenström</namePart><affiliation>Lund Institute of Technology, Dept. of Chemical Engineering I, P.O. Box 124, S-221 00 Lund Sweden</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Aly</namePart><affiliation>Lund Institute of Technology, Dept. of Chemical Engineering I, P.O. 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Scrubbing could be necessary in some cases and can be performed with alkali. A factorial design experiment was performed to determine the effects of four different components (H2SO4, HCl, HF, H2SiF6) in WPA on cadmium extraction with Alamine 336. The largest influence on cadmium extraction is seen for the hydrochloric acid, drastically increasing the distribution coefficient. Variations of the concentrations of H3PO4, HCl, HF, Fe and Al were also studied. The extraction of cadmium was seen to be strongly dependent on phosphoric acid concentration. 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