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Title:
A METHOD FOR THE REMOVAL OF ORGANIC CHEMICALS AND ORGANOMETALLIC COMPLEXES FROM PROCESS WATER OR OTHER STREAMS OF A MINERAL PROCESSING PLANT USING ZEOLITE
Document Type and Number:
WIPO Patent Application WO/2012/034202
Kind Code:
A3
Abstract:
The present invention refers to a method to remove organic chemicals and organometallic complexes (organic heavy metal complexes) using zeolite from process water or tailings streams of a mineral processing plant where diethylenetriamine (DETA) or triethylenetetramine (TETA) is used as a flotation reagent and DETA-metal complexes are found in process water or tailings streams. In a preferred embodiment, the process water or slurry tailings streams of a mineral processing plant containing DETA, DETA-metal complexes and residual heavy metals are contacted with natural zeolite. This can be carried out by adding the natural zeolite to the process streams (slurries) while mixing with a mechanical mixer to efficiently adsorb DETA, DETA-metal complexes and heavy metals from the process streams (slurries) on the zeolite. The loaded zeolite is then discarded with the flotation tailings.

Inventors:
DONG JIE (CA)
XU MANQUI (CA)
SCHOLEY KENNETH ERWIN (CA)
Application Number:
PCT/BR2011/000328
Publication Date:
December 27, 2012
Filing Date:
September 13, 2011
Export Citation:
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Assignee:
VALE SA (BR)
DONG JIE (CA)
XU MANQUI (CA)
SCHOLEY KENNETH ERWIN (CA)
International Classes:
B01D15/02; C02F1/28; B01D15/36; C02F1/42; C02F1/62; C22B3/24; C02F101/20; C02F103/10; C02F103/16
Foreign References:
GB1501152A1978-02-15
US4659512A1987-04-21
Other References:
See also references of EP 2616395A4
Attorney, Agent or Firm:
VEIRANO ADVOGADOS (12995 18° Andar,São Paul, SP -000, BR)
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