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Method and equipment for liquid-liquid extraction

A kind of equipment and technology of extraction process, which is applied in the field of extraction equipment to realize the reverse flow, and can solve the problems of insufficient separation capacity of the settler, high droplet entrainment of separation solution, etc.

Inactive Publication Date: 2006-05-24
OUTOKUMPU OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the separation capacity of the settler is insufficient and the residual droplet entrainment of the separated solution is high

Method used

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  • Method and equipment for liquid-liquid extraction
  • Method and equipment for liquid-liquid extraction
  • Method and equipment for liquid-liquid extraction

Examples

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Embodiment Construction

[0031] The extraction step according to FIG. 1 comprises a mixing section 1 and a separating section or settler 2 . In this case, the mixing section includes pump tank 3 and mixers 4 and 5 . The aqueous and organic solutions are first delivered to the pump tank and from there to the first and second mixers. Obviously, the number of pump tanks and mixers can vary depending on the amount of solution being delivered. A pump tank is preferred, see eg US Patent 5,662,871.

[0032] The settler 2 comprises a front end 6, a rear end 7, side walls 8 and 9 and, in principle, partition walls 10 and 11 in the same direction as the side walls. However, the partition walls are preferably placed such that the cross-sectional area forming the flow field becomes smaller in the flow direction. The partition may form an angle of 5-15° with the longitudinal axis of the settler. The taper angle of the outward flow field is preferably 15-25°. The solution dispersion from the last mixer flows t...

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PUM

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Abstract

The invention relates to a method of reversing a dispersion formed in the mixing section of liquid-liquid extraction, concentrated in the separating section, and forming a separated solution at the rear end of the separating section, which is fed in two separate streams towards the separating section end flow back. The invention also relates to an extraction device enabling said reverse flow.

Description

technical field [0001] The present invention relates to a method of reversing a dispersion formed in the mixing section of liquid-liquid extraction, concentrated in the separating section and forming a separated solution at the rear end of the separating section, which is fed in two separate streams towards the separating section end flow back. The invention also relates to an extraction device enabling said reverse flow. Background technique [0002] The method and apparatus of the present invention are particularly relevant to extraction processes used in metal recovery. Extraction enables the recovery of precious metals that fall into this category, such as copper, uranium, cobalt, nickel, zinc and molybdenum. In all of these extraction processes, an aqueous solution containing precious metals is contacted with an organic solution in the mixing part of the extraction, thereby forming a dispersion of the two solutions that are insoluble in each other. The solution in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04C22B3/02C22B3/26C22B15/00C22B19/00C22B23/00C22B34/34C22B60/02
CPCB01D11/04C22B3/02Y02P10/20C22B3/26
Inventor B·尼曼E·埃克曼S-E·胡尔托尔姆P·佩卡拉J·吕拉L·利亚R·库西斯托
Owner OUTOKUMPU OY