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Liquid-liquid extraction mixer-settler and extraction method and application thereof

A mixing-settling tank and extraction technology, applied in the field of liquid-liquid extraction mixing-settling tank, can solve the problems of increasing the loss of solvent entrainment, increasing the number of filtration, etc., to prolong the time of clarification and phase separation, reduce the liquid storage capacity, and be easy to maintain and operate. Effect

Inactive Publication Date: 2014-11-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, solid deposits or impurities in the material can be a potential source of accidents
In order to keep the feed liquid clear, it is necessary to strictly filter the feed liquid, and increasing the number of filtrations may increase the entrainment loss of the solvent, and the cost of the coalescing device will make the addition of the coalescing device lose economic advantages. Therefore, it is rarely used in industry

Method used

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  • Liquid-liquid extraction mixer-settler and extraction method and application thereof
  • Liquid-liquid extraction mixer-settler and extraction method and application thereof
  • Liquid-liquid extraction mixer-settler and extraction method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A liquid-liquid extraction mixing and settling tank, the mixing and settling tank includes a mixing chamber and a clarification chamber; the side of the clarification chamber near the mixing chamber is provided with a guide pipe 11, and the guide pipe 11 extends from the outlet of the mixing chamber to The end of the clarification chamber; in the clarification chamber, at least a wedge-shaped body 12 is fixed laterally above or below the draft tube 11 .

[0049] The liquid-liquid continuous extraction method is carried out through the mixing and settling tank. After the light and heavy phases are mixed in the mixing chamber, they flow into the draft pipe 11 from the outlet of the mixing chamber, and flow out from the end of the draft pipe 11 to the end of the clarification chamber. The side of 12 deflects to the front end of the clarification chamber, and after reaching the front end of the clarification chamber, it passes through the gap between the wedge body 12 and th...

Embodiment 2

[0051] like figure 1 As shown, a liquid-liquid extraction mixing and settling tank, the mixing and settling tank includes a mixing chamber and a clarification chamber. The side of the clarification chamber close to the mixing chamber is provided with an L-shaped draft pipe 11, and the L-shaped draft pipe 11 extends from the outlet of the mixing chamber to the end of the clarification chamber; the clarification chamber is above the L-shaped draft pipe 11 A wedge-shaped body 12 is fixedly arranged laterally at the bottom and below.

[0052] The bottom end of the wedge-shaped body 12 is fixed on the end side wall of the clarification chamber, and its top end is close to one end of the mixing chamber, leaving a gap with the side wall of the mixing chamber. The width a of the wedge-shaped body 12 is equal to the width of the clarification chamber, its vertical height b is half of the height of the clarification chamber, and its horizontal length c is equal to the length of the cla...

specific Embodiment 1

[0061]A liquid-liquid extraction mixing and settling tank, 6 stages connected in series, the length ratio of mixing chamber:clarifying chamber is 1:4. The clarification chamber is 600mm in length, 80mm in width and 170mm in height. The light phase of the extraction system is a kerosene solution of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (referred to as P507), and the volume percentage of P507 is 30%. The heavy phase is an aqueous solution of sulfuric acid at pH=3.5 containing nickel and cobalt metal ions, in which nickel is 1.3g / L and cobalt is 0.8g / L. The light phase flow rate is 20L / h, and the heavy phase flow rate is 50L / h. The heavy phase sample is collected from the heavy phase liquid outlet 15 for analysis. The cobalt extraction rate is 98%, and the nickel extraction rate is 3%.

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Abstract

The invention relates to a liquid-liquid extraction mixer-settler and an extraction method and an application thereof. The mixer-settler comprises a mixing chamber and a clarifying chamber, wherein the side in the clarifying chamber near the mixing chamber is provided with a guide pipe which extends to the tail end of the clarifying chamber from an outlet of the mixing chamber; and at least the upper part or the lower part of the guide pipe in the clarifying chamber is transversely and fixedly provided with a wedge-shaped body. As the upper part and / or the lower part of the guide pipe in the clarifying chamber is fixedly provided with the wedge-shaped body, not only is the storage amount of organic phases in the settling chamber reduced, but also a large light-heavy two-phase settling area is provided so that the clarifying phase-splitting time is prolonged, and the clarifying separation effect is remarkable for an easily-emulsifying system or a system with larger viscosity; and the mixer-settler provided by the invention can be used for single-stage continuous extraction operation or multi-stage series-connected countercurrent continuous extraction operation.

Description

technical field [0001] The invention belongs to the technical field of extraction in chemical separation, and in particular relates to a liquid-liquid extraction mixing and settling tank with a simple and compact structure and a large settling area, and an extraction method and application using the mixing and settling tank. Background technique [0002] Liquid-liquid extraction is an important chemical separation technology. It has the advantages of high separation efficiency, strong material adaptability, low energy consumption, easy operation, and large-scale continuous production. It is widely used in hydrometallurgy, petrochemical industry, new energy , biomedicine, environmental engineering, natural product extraction, new material preparation and other fields are widely used. With the continuous expansion of the production scale and the increasingly complex separation objects, higher and higher requirements are placed on the extraction equipment. [0003] The mixed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D11/04
CPCB01D11/043
Inventor 黄焜刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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