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Complex extracting and dephenolizing method for alkaline slag of smeltery

An extraction and complexation technology, which can be used in solid solvent extraction, chemical instruments and methods, preparation of organic compounds, etc., and can solve problems affecting the application prospects of the phenol market.

Inactive Publication Date: 2005-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phenol recovered by complex extraction contains a large amount of sulfide and is accompanied by foul smell, which affects the market application prospect of phenol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: first by the total volume ratio of 25%, 65% and 10% tributyl phosphate, C 4 The fusel alcohol and toluene are mixed to obtain the extractant I of complex extraction separation phenol; followed by 5%, 85% and 10% of the total volume ratio of C 8 Saturated hydrocarbons, C 1 The fusel alcohol and toluene are mixed to obtain the extractant II for complex extraction of refined phenol; the extractant I is mixed with the alkali residue system with a pH value between 11 and 12 in a volume ratio of 1:1, and the complex extraction is carried out at 40 ° C for 30 Minutes; then add extractant II with 25% mass percentage of extractant I, and complex extraction at 60°C for 15 minutes to obtain a three-phase extraction system, one phase is the raffinate phase, and the other is rich in phenol and extractant I Phase I, one phase is phase II rich in sulfide and extractant II, adding 5% NaOH saturated solution of phase I volume ratio to phase I for back extraction, the phen...

Embodiment 2

[0008] Embodiment 2: first by the total volume ratio of 48%, 45% and 7% tributyl phosphate, C 5 The fusel alcohol and ethylbenzene are mixed to obtain the extractant I of complex extraction separation phenol; followed by 10%, 70% and 20% of the total volume ratio of C 9 Saturated hydrocarbons, C 5 The fusel alcohol and ethylbenzene are mixed to obtain the extractant II for complex extraction of refined phenol; the extractant I and the alkali residue system with a pH value between 11 and 12 are mixed in a volume ratio of 1.5:1, and the complex extraction is carried out at 46 ° C. 20 minutes; then add extractant II with 35% mass percentage of extractant I, complex extraction at 50°C for 40 minutes to obtain a three-phase extraction system, one phase is the raffinate phase, and the other is rich in phenol and extractant Phase I of I, one phase is phase II rich in sulfides and extractant II, add 4% NaOH saturated solution of phase I volume ratio to phase I for back extraction, th...

Embodiment 3

[0009] Embodiment 3: first by the total volume ratio of 25%, 68% and 7% tributyl phosphate, C 6 Fusel alcohol and xylene are mixed to obtain the extractant I of complex extraction separation phenol; followed by 8%, 75% and 17% of the total volume ratio of C 10 Saturated hydrocarbons, C 6 The fusel alcohol and xylene are mixed to obtain the extractant II for complex extraction of refined phenol; the extractant I and the alkali residue system with a pH value between 11 and 12 are mixed in a volume ratio of 2:1, and the complex extraction is carried out at 43 ° C. 15 minutes; then add extractant II with 28% mass percentage of extractant I, complex extraction at 53°C for 25 minutes to obtain a three-phase extraction system, one phase is the raffinate phase, and the other is rich in phenol and extractant Phase I of I, one phase is phase II rich in sulfides and extractant II, add 3% NaOH saturated solution of phase I volume ratio to phase I for back extraction, the phenol in phase ...

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PUM

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Abstract

The comprehensive refinery caustic sludge complex extracting and dephenolizing process includes mixing tributyl phosphate, hybrid C4-C7 alcohol and toluene, ethyl benzene or xylene to obtain extractant I; mixing saturated C8-C12 hydrocarbon, hybrid C4-C7 alcohol and toluene, ethyl benzene or xylene to obtain extractant II; mixing extractant I with caustic sludge system for complex extraction; adding extractant II to obtain triphase extraction system for complex extraction including raffinate, extractant I phase rich in phenol and extractant II phase rich in sulfide; adding saturated NaOH solution into extractant I phase for re-extracting to eliminate phenol and obtain extractant I; and heating extractant II phase for re-extracting to eliminate sulfide and obtain extractant II. The present invention has raised extracting rate, and raised phenol purity and utilization.

Description

technical field [0001] The invention relates to a comprehensive utilization method of refining alkali slag, in particular to a refinery alkali slag complex extraction dephenolization method. Background technique [0002] At present, in order to meet the quality requirements of vehicle fuels and basic organic chemical raw materials, and to eliminate the influence of impurities and odors such as sulfides, phenols, and naphthenic acids in petroleum products, refining and chemical companies often use alkali refining and alkali purification processes to refine products , resulting in a large amount of alkali slag waste liquid produced in the production process. Alkali slag is generally dark in color, accompanied by a foul smell, and contains high concentrations of sulfides, phenols and naphthenic acid sodium salts, oils, and reaction residual free NaOH and other pollutants, which cannot be directly discharged into the refinery. sewage treatment plant. Therefore, doing a good jo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02B09B3/00C07C37/70C10G19/00
Inventor 李旭祥倪炳华黄风林刘菊荣奚西峰
Owner CHINA PETROLEUM & CHEM CORP
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