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Naphthenic acid extraction organic phase regeneration method

A technology of naphthenic acid and organic phase, which is applied in the field of naphthenic acid extraction organic phase regeneration, can solve the problems of poor regeneration effect of aged naphthenic acid, and achieve the effect of poor regeneration effect, strong operability and low regeneration cost

Active Publication Date: 2021-05-25
CHALCO GUANGXI RARE EARTH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above shortcomings, the present invention discloses a simple and effective naphthenic acid extraction organic phase regeneration method, which solves the poor regeneration effect of the existing aging naphthenic acid The problem

Method used

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  • Naphthenic acid extraction organic phase regeneration method
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Embodiment 1

[0020] A method for regeneration of organic phase extracted by naphthenic acid, comprising the following steps:

[0021] (1) Take aged naphthenic acid and add sulfonated kerosene, the volume of sulfonated kerosene is 5% of the volume of aged naphthenic acid, then add hydrochloric acid solution with a mass fraction of 10% and react for 30 minutes, then separate the organic phase, Then add pure water to the organic phase to wash the pH to 5; the volume ratio of the aged naphthenic acid to the hydrochloric acid solution is 10:1;

[0022] (2) Distill the organic phase obtained after the treatment in step (1) at a temperature of 300°C and a pressure of 500Pa, and during the entire vacuum distillation process, under the condition of stirring at a speed of 10r / min Continuously add the naphthenic acid regenerant at a uniform speed, the total volume of the added naphthenic acid regenerant is 5% of the volume of the organic phase, and the naphthenic acid regenerant is made of pure water...

Embodiment 2

[0025] A method for regeneration of organic phase extracted by naphthenic acid, comprising the following steps:

[0026] (1) Take aged naphthenic acid and add sulfonated kerosene, the volume of sulfonated kerosene is 15% of the volume of aged naphthenic acid, then add hydrochloric acid solution with a mass fraction of 30% and react for 60 minutes, then separate the organic phase, Then add pure water to the organic phase to wash the pH to 6.5; the volume ratio of the aged naphthenic acid to the hydrochloric acid solution is 1:1;

[0027] (2) The organic phase obtained after step (1) is subjected to vacuum distillation at a temperature of 400°C and a pressure of 100,000 Pa, and during the entire process of vacuum distillation, under the condition of stirring at a speed of 20r / min Continuously add the naphthenic acid regenerant at a constant speed, the total volume of the added naphthenic acid regenerant is 30% of the volume of the organic phase, and the naphthenic acid regeneran...

Embodiment 3

[0030] A method for regeneration of organic phase extracted by naphthenic acid, comprising the following steps:

[0031] (1) Take aged naphthenic acid and add sulfonated kerosene, the volume of sulfonated kerosene is 10% of the volume of aged naphthenic acid, then add hydrochloric acid solution with a mass fraction of 25% and react for 2 minutes, then separate the organic phase, Then add pure water to the organic phase to wash the pH to 7; the volume ratio of the aged naphthenic acid to the hydrochloric acid solution is 2:1;

[0032] (2) Perform vacuum distillation on the organic phase obtained after step (1) at a temperature of 80°C and a pressure of 5 Pa, and during the entire process of vacuum distillation, under the condition of stirring at a speed of 5 r / min Continuously add the naphthenic acid regenerant at a uniform speed, the total volume of the added naphthenic acid regenerant is 50% of the volume of the organic phase, and the naphthenic acid regenerant is made of pur...

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Abstract

The invention discloses a naphthenic acid extraction organic phase regeneration method. The naphthenic acid extraction organic phase regeneration method comprises the following steps that aged naphthenic acid is taken, added with sulfonated kerosene, added into a hydrochloric acid solution for reacting for 2-60 minutes, and separated to obtain an organic phase, and pure water is added into the organic phase to wash the organic phase until the organic phase is neutral; the organic phase is subjected to reduced pressure distillation under the conditions that the temperature is 80-400 DEG C and the pressure is 5-100000 Pa, in the whole reduced pressure distillation process, a naphthenic acid regenerant is continuously added at a constant speed under the stirring condition, and the total volume of the added naphthenic acid regenerant is 5-50% of the volume of the organic phase; and a gas phase obtained by reduced pressure distillation passes through a multi-stage condenser to obtain condensate, namely regenerated naphthenic acid, wherein the exhaust temperature of the multi-stage condenser is 20-80 DEG C. The naphthenic acid extraction organic phase regeneration method is simple and effective in process, and the problem of poor regeneration effect of existing aged naphthenic acid is solved.

Description

technical field [0001] The invention belongs to the technical field of extraction solvent regeneration, and in particular relates to a method for regeneration of an organic phase extracted by naphthenic acid. Background technique [0002] Rare earth metals (rare earth metals), also known as rare earth elements or rare metals, is a general term for 17 elements of scandium, yttrium, and lanthanide in group IIIB of the periodic table of elements, and is often represented by R or RE. Rare earth metals have extremely important uses and are an important part of contemporary high-tech new materials. A series of compound semiconductors, electro-optical materials, special alloys, new functional materials and organometallic compounds composed of rare earth metals and non-ferrous metals all require the use of rare earth metals with unique properties. Rare earth metals have been widely used in contemporary communication technology, electronic computers, aerospace development, medicine ...

Claims

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Application Information

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IPC IPC(8): C22B3/32C22B59/00
CPCC22B59/00Y02P10/20
Inventor 江泽佐钟春兰张亮玖俞志春庄辉羊多彦马宗云李飞龙潘畅雷利利廖鹏韦国咐
Owner CHALCO GUANGXI RARE EARTH DEV CO LTD