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Method for removing residual formic acid in epoxidized fatty acid methyl esters or epoxidized soybean oil by use of eutectic solvent

A technology for epoxidized fatty acid methyl ester and epoxidized soybean oil is applied in the field of removing residual formic acid in epoxidized fatty acid methyl ester or epoxidized soybean oil, which can solve the problems of easy emulsification, large amount of waste water, etc. The effect of improving quality index and high extraction efficiency

Active Publication Date: 2013-09-04
石家庄搏澳增塑材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the technical problems of large amount of waste water and easy emulsification caused by the water washing or alkali washing method in the prior art to remove formic acid, the present invention provides a process for removing waste water and high formic acid removal rate by using a deep eutectic solvent. Method for Residual Formic Acid in Oxyfatty Acid Methyl Esters or Epoxidized Soybean Oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composition of the epoxy fatty acid methyl ester obtained through the formic acid method epoxidation process is shown in Table 1.

[0030] components

epoxy fatty acid methyl ester

formic acid

water

peroxyformic acid

Content, wt%

95.7

2.5

1.5

0.3

[0031] Table 1

[0032] In the thick epoxy fatty acid methyl ester of composition shown in table 1, join in the deformic acid extraction tank, add extraction agent under vigorous stirring condition, continue to stir for 2 hours. After standing for 30 minutes, the supernatant material was decanted. The extraction temperature in the extraction kettle is 25°C, the extraction pressure is 0.1MPa, the mass ratio of the extraction agent choline chloride to the formic acid in the epoxy fatty acid methyl ester is 3.5:1; the extraction agent is a composite extraction agent , the composite extraction agent is composed of a mixture of choline chloride and betaine hydrochloride,...

Embodiment 2

[0038] The composition of the epoxy fatty acid methyl ester obtained through the formic acid method epoxidation process is shown in Table 2.

[0039] components

epoxy fatty acid methyl ester

formic acid

water

peroxyformic acid

Content, wt%

97.5

0.5

1.5

0.5

[0040] Table 2

[0041] The crude epoxy fatty acid methyl ester of composition shown in Table 2 was added in the extraction kettle, and the extractant was added under vigorous stirring, and the stirring was continued for 2 hours. After standing for 30 minutes, the supernatant material was decanted. The extraction temperature in the extraction kettle is 25°C, the extraction pressure is 0.1MPa, and the mass ratio of the extraction agent choline chloride to the formic acid in the epoxy fatty acid methyl ester is 3:1; the extraction agent is a single extraction agent Choline Chloride. The volume of the extraction kettle is 5 cubic meters.

[0042] In the above steps, ...

Embodiment 3

[0047] The composition of epoxidized soybean oil obtained through the formic acid epoxidation process is shown in Table 3.

[0048] components

Epoxidized soybean oil

formic acid

water

peroxyformic acid

Content, wt%

94.5

3

2

0.5

[0049] table 3

[0050] Add the crude epoxidized soybean oil of the composition shown in Table 3 into the extraction kettle, add choline chloride under strong stirring conditions, and continue stirring for 2 hours. After standing for 30 minutes, the supernatant material was decanted. The extraction temperature in the extraction tank was 25° C., the extraction pressure was 0.1 MPa, and the mass ratio of the extractant choline chloride to formic acid in the epoxidized soybean oil was 3.5:1. The volume of the extraction kettle is 5 cubic meters.

[0051] In the above steps, the formic acid in the epoxidized soybean oil and the deep eutectic solvent formed by entering the extractant flow into the ...

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Abstract

The invention belongs to the field of chemical technology and specifically relates to a method for removing residual formic acid in epoxidized fatty acid methyl esters or epoxidized soybean oil by the use of a eutectic solvent. The method provided by the invention comprises the following specific steps: sending crude epoxidized fatty acid methyl esters or crude epoxidized soybean oil which contains 0.2-15wt% of formic acid and is obtained by a epoxidation process through a formic acid method into an extraction kettle, adding a certain amount of an extractant under the condition of stirring, stirring for a period of time, standing for layering, sending a material on the upper layer into a vacuum dehydration kettle for further dehydration and refining, pouring an extract on the lower layer into an extractant regeneration kettle; heating under the condition of pressure reduction to distill formic acid in the extract, recycling the formic acid steam after being condensed in a condenser, and sending residual extractant left in the extractant regeneration kettle into the extraction kettle for recycling. The method provided by the invention has advantages of no discharge of waste water, high formic acid removal rate, simple technological operation, environmental protection, safety and low cost, and is suitable for both small-scale device and large-scale device production.

Description

technical field [0001] The invention relates to a method for removing residual formic acid in epoxy fatty acid methyl ester or epoxy soybean oil by using a deep eutectic solvent. Background technique [0002] Plasticizer is an important chemical raw material, which is widely used in the processing of plastic and rubber products, and is the most used type of plastic additives. Traditional plasticizers, phthalates, are low-molecular substances with high volatility and are easy to dissipate in the environment. When they enter the human body or animals, they will produce imitative estrogen, which is potentially carcinogenic and harmful to the environment. [0003] With the development of science and technology and the improvement of people's living standards, the global demand for PVC is increasing day by day. The global PVC production capacity is 44 million t / a, China's production capacity is 15 million t / a, and Taiwan's is 1.35 million t / a. The apparent consumption of PVC in...

Claims

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Application Information

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IPC IPC(8): B01D11/04
Inventor 冯树波朱跃超刘敏王宇配韩久利乔任燕
Owner 石家庄搏澳增塑材料科技有限公司
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