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Extraction separation method of acetylpropionic acid

A levulinic acid and extraction technology, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate, etc.

Active Publication Date: 2018-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of separating levulinic acid by complex extraction has not been reported at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Tributyl phosphate is used as a complexing agent, and propyl formate is used as a cosolvent. The mass ratio of the complexing agent and the co-solvent is 1:1 to prepare a complexing extractant, and the raw material hydrolyzate and the complexing extractant are mixed in a separatory funnel at a temperature of 25°C Shake and stand for one hour. After separation, take the upper organic phase for analysis. The separation coefficient is 4.98, and the extraction rate of levulinic acid is 83.28%.

Embodiment 2

[0028] Tributyl phosphate is used as a complexing agent, and propyl formate is used as a cosolvent. The mass ratio of the complexing agent and the co-solvent is 1:1 to prepare a complexing extractant, and the raw material hydrolyzate and the complexing extractant are mixed in a separatory funnel at a temperature of 25°C Shake and stand for one hour. After separation, take the upper organic phase for analysis. The separation coefficient is 4.43, and the extraction rate of levulinic acid is 81.58%.

Embodiment 3

[0030] Tributyl phosphate is used as a complexing agent, and ethyl acetate is used as a cosolvent. The mass ratio of the complexing agent and the co-solvent is 1:1 to prepare a complexing extractant, and the raw material hydrolyzate and the complexing extractant are mixed in a separatory funnel at a temperature of 25°C Shake and stand for one hour. After separation, take the upper organic phase for analysis. The separation coefficient is 9.51, and the extraction rate of levulinic acid is 90.49%.

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PUM

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Abstract

The invention relates to an extraction separation method of acetylpropionic acid. The method comprises the step of contacting an acetylpropionic acid water solution with a complexing extractant, wherein the complexing extractant is prepared from a complexing agent and a cosolvent, the complexing agent is selected from at least one of tributyl phosphate, trioctyl phosphate or trialkyl phosphine oxide, and the cosolvent is selected from at least one of ethyl formate, propyl formate, ethyl acetate, propyl acetate, methyl propionate or ethyl propionate; the weight ratio of the complexing agent tothe cosolvent is (20:1)-(1:20). The method can be used for industrial production for separation purification of acetylpropionic acid.

Description

technical field [0001] The invention relates to a method for extracting and separating levulinic acid. Background technique [0002] Levulinic acid is an important platform compound for biomass conversion, which can be used to produce high value-added chemicals through hydrogenation, oxidative dehydrogenation, esterification, etc., and is widely used. Levulinic acid is usually produced by hydrolysis of biomass raw materials. Hydrochloric acid or sulfuric acid is usually used as a catalyst in the hydrolysis process. Cellulose is decomposed into glucose monomers under acidic conditions, and then hydrolyzed to generate levulinic acid and formic acid. Because the concentration of levulinic acid in the hydrolyzate is low, and levulinic acid has a carboxylic acid hydrophilic group, and there is a certain amount of formic acid in the solution, both formic acid and levulinic acid are weak organic acids, so the separation is difficult. To obtain levulinic acid with higher purity, th...

Claims

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Application Information

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IPC IPC(8): C07C51/48C07C51/487C07C59/185
CPCC07C51/48C07C51/487C07C59/185
Inventor 王晓晨宋奇郑均林
Owner CHINA PETROLEUM & CHEM CORP
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