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Regeneration method of aged naphthenic acid organic phase

An organic phase and naphthenic acid technology, which is applied in the field of solvent extraction, can solve the problems of waste and aging naphthenic acid organic phase polluting the environment and affecting the ecology, and achieves the effects of low regeneration cost, fast regeneration speed and short process flow.

Inactive Publication Date: 2015-12-30
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the discarded aged naphthenic acid organic phase pollutes the environment and affects ecology without any method for regenerating the aged naphthenic acid organic phase, and establishes a simple, fast and efficient way to regenerate the aged naphthenic acid organic phase Methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Transfer 600L aged naphthenic acid organic phase to 1000L reaction pot, add 21kg 2 / g of γ-alumina, stirred at room temperature for 17h, filtered; the filtrate was the organic phase of regenerated naphthenic acid, and its yield was 96%.

Embodiment 2

[0011] Transfer 600L aged naphthenic acid organic phase to 1000L reaction pot, add 18kg 2 / g of γ-alumina, stirred at room temperature for 18h, filtered; the filtrate was the organic phase of regenerated naphthenic acid, and its yield was 97%.

Embodiment 3

[0013] Transfer 600L aged naphthenic acid organic phase to 1000L reaction pot, add 24kg particle size 4mm, BET specific surface area 240m 2 / g of γ-alumina, stirred at room temperature for 16h, filtered; the filtrate was the organic phase of regenerated naphthenic acid, and its yield was 95%.

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PUM

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Abstract

The invention provides a regeneration method of an aged naphthenic acid organic phase. Gamma-aluminum oxide serves as a regeneration agent. The aged naphthenic acid organic phase is transferred into a reaction kettle, and 30 g-40 g of the gamma-aluminum oxide is added to a liter of the aged naphthenic acid organic phase; stir treatment is conducted for 16 h-18 h at the room temperature, then filtration is conducted, filtrate serves as the regenerated naphthenic acid organic phase, and the yield ranges from 95 percent to 97 percent. The regeneration method of the aged naphthenic acid organic phase has the advantages of being short in technological process, high in regeneration speed, less in chemical reagent dosage, free of waste liquor discharge, simple in equipment, easy and convenient to operate, low in regeneration cost and the like.

Description

technical field [0001] The invention relates to a method for regenerating the organic phase of aged naphthenic acid, in particular to a method for recovering the extraction performance and function of the organic phase of aged naphthenic acid by using gamma-alumina as a regeneration agent. The invention specifically belongs to the technical field of solvent extraction. Background technique [0002] Naphthenic acid is an acidic extractant mainly used to separate and prepare fluorescent grade yttrium oxide from high-yttrium rare earth ores (such as Longnan mine). In actual use, naphthenic acid is usually dissolved in kerosene or sulfonated kerosene, and a certain amount of organic alcohol (such as mixed alcohol, 2-octanol, etc.) is added as a demulsifier to form an organic phase. Since the naphthenic acid organic phase is recycled for a long time, it is inevitable that the naphthenic acid organic phase gradually undergoes reactions and changes such as esterification and oxida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B59/00
CPCY02P10/20
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY