Recovery method for acidic extractant in saponification wastewater of acidic extraction system and recovery device thereof

A technology of acid extraction agent and recovery method, which is applied in the direction of extraction water/sewage treatment, metallurgical wastewater treatment, etc., to achieve the effect of reducing treatment cost, increasing B/C value, and low energy consumption

Active Publication Date: 2020-08-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Although the above methods disclose different schemes for the recycling of saponified wastewater, they are all for the recycling of salt in saponified wastewater

Method used

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  • Recovery method for acidic extractant in saponification wastewater of acidic extraction system and recovery device thereof

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Embodiment 1

[0050] This embodiment provides a recovery device for the acidic extractant in saponification wastewater of the acidic extraction system, the structural diagram of the recovery device is as follows figure 1 As shown, the bottom of the recovery device is provided with a diluent inlet and an aqueous phase outlet, and the top is provided with an acidic extraction system saponification wastewater inlet and an organic phase outlet; the organic phase outlet is connected to the organic phase outlet pipeline, and the organic phase outlet pipeline It is divided into two branches, one is used to extract the organic phase loaded with acidic extractant; the other is connected to the diluent inlet and used to recycle the diluent.

[0051] The diluent inlet is connected with the diluent inlet pipeline 2; the water phase outlet is connected with the water phase discharge pipeline 4; the saponification wastewater inlet of the acidic extraction system is connected with the saponification wastew...

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Abstract

The invention relates to a recovery method for an acidic extractant in saponification wastewater of an acidic extraction system and a recovery device thereof, and the recovery method comprises the following steps: treating the acidic extractant in the saponification wastewater by using a diluent to obtain an organic phase containing the acidic extractant and a water phase from which phosphorus andmost of oil are removed. The diluent provided by the invention comprises a diluent for preparing the acidic extraction system, the method for extracting the acid by using the diluent for preparing the extraction system is simple, and the phosphorus content and the oil content in the saponification wastewater can be remarkably reduced, so that the B / C value in the saponification wastewater is remarkably increased, and the subsequent treatment difficulty and cost (2-3 yuan / ton) of the saponification wastewater are reduced; because the price of the acidic extractant is usually higher than 30,000yuan / ton, the ton water recovery value of the acidic extractant in the saponification wastewater is more than or equal to 3 yuan.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and relates to a treatment method and a treatment device for saponification wastewater, in particular to a recovery method and a recovery device for an acidic extractant in saponification wastewater in an acidic extraction system. Background technique [0002] The separation and purification of metals by dissolution extraction technology is a mature method in the field of hydrometallurgy. Acidic extractants are widely used in the process of solvent extraction of metals. They are excellent extractants for rare earth extraction, nickel, cobalt, and manganese extraction. It has made important contributions to chemical recovery and extraction of valuable elements from nickel-cobalt ore. Acidic extractants usually require saponification before extraction. The saponification agents used in the saponification process include alkaline substances such as ammonia, sodium hydroxide, calcium oxide or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F103/16
CPCC02F1/26C02F2103/16
Inventor 曹宏斌宁朋歌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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