Advanced

Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components

Stenström, Stig LU and Aly, Gharib LU (1985) In Hydrometallurgy 14(2). p.231-255
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Hydrometallurgy
volume
14
issue
2
pages
231 - 255
publisher
Elsevier
external identifiers
  • wos:A1985AMB5100006
  • scopus:0022093976
ISSN
0304-386X
DOI
10.1016/0304-386X(85)90035-0
language
English
LU publication?
yes
id
cffa856c-6c0a-4cb7-bada-faeba4bd2bee (old id 3914159)
date added to LUP
2013-07-01 10:19:19
date last changed
2017-01-01 04:20:14
@article{cffa856c-6c0a-4cb7-bada-faeba4bd2bee,
  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.<br/><br>
<br/><br>
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.<br/><br>
<br/><br>
A simple extraction model is proposed indicating that CdCl42− ions are extracted.},
  author       = {Stenström, Stig and Aly, Gharib},
  issn         = {0304-386X},
  language     = {eng},
  number       = {2},
  pages        = {231--255},
  publisher    = {Elsevier},
  series       = {Hydrometallurgy},
  title        = {Extraction of cadmium from phosphoric acid solutions with amines Part I. Extractant selection, stripping, scrubbing and effects of other components},
  url          = {http://dx.doi.org/10.1016/0304-386X(85)90035-0},
  volume       = {14},
  year         = {1985},
}