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Method for extracting methyl stearate from stearoylbenzoylmethane raffinate

A technology for stearoylbenzoylmethane and methyl stearate, applied in the field of extracting methyl stearate, can solve the problems of low cost, low energy consumption, large energy consumption and the like, and achieves low cost and low energy consumption Effect

Inactive Publication Date: 2013-01-30
ANHUI JIAXIAN FUNCTIONAL AUXILIARY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of large energy consumption and high cost in the existing production process by rectification extraction, the purpose of the present invention is to provide a stearoylbenzoylmethane raffinate with low energy consumption and low cost to extract stearic acid Methyl ester method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Add 150ml of SBM raffinate and 300ml of methanol (volume ratio 1:2) into a four-neck flask, heat and stir to raise the temperature to 50°C and keep it for 20 minutes to ensure full extraction, then stir and cool down to 34°C. Stand for stratification, separate and remove the lower layer, continue to cool the upper layer to 10°C, vacuum filter, add 2 times the volume of methanol after the filter cake is heated and melted, repeat the above extraction, layering, separation and vacuum filtration process, wash the filter cake twice Then heated to 100°C to remove water to obtain methyl stearate with poor color, 68% content and 85% yield.

Embodiment 2

[0008] Example 2: Add 150ml of SBM raffinate and 450ml of methanol (volume ratio 1:3) into a four-neck flask, heat and stir to raise the temperature to 56°C and keep it for 20 minutes to ensure full extraction, then stir and cool down to about 35°C (not lower than 33°C), let stand for stratification, separate and remove the lower layer, continue to cool the upper layer to 10°C, vacuum filter, add 2 times the volume of methanol after the filter cake is heated and melted, repeat the above extraction, layering, separation and vacuum pumping During the filtration process, the filter cake was washed 3 times with water and then heated to 100°C to remove water to obtain methyl stearate with a poor color, a content of 73%, and a yield of 80%.

Embodiment 3

[0009] Example 3: Add 150ml of SBM raffinate and 600ml of methanol (volume ratio 1:4) into a four-neck flask, heat and stir to raise the temperature to 52°C and keep it for 20 minutes to ensure full extraction, then stir and cool down to about 36°C , stand for stratification, separate and remove the lower layer, continue to cool the upper layer to 10°C, vacuum filter, add 2 times the volume of methanol after the filter cake is heated and melted, repeat the above extraction, layering, separation and vacuum filtration process, and wash the filter cake for 2 Heating again to 100°C to remove water to obtain methyl stearate with a normal color, 80% content, and 75% yield.

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Abstract

The invention discloses a method for extracting methyl stearate from stearoylbenzoylmethane (SBM) raffinate. The method comprises the following steps: mixing the SBM raffinate with methanol according to a volume ratio of 1: 2-6; heating an obtained mixture to a temperature of 50 to 56 DEG C under stirring and maintaining for 20 min to ensure full extraction; then cooling the mixture to a temperature of 33 to 36 DEG C under stirring and standing the mixture for layering; carrying out separation to remove a lower layer; continuing to cool an upper layer to a temperature of 10 DEG C; carrying out vacuum filtration; heating and melting a filter cake, adding 2 times volume of methanol and repeating the above-mentioned procedures of extraction, layering, separation and vacuum filtration; rinsing the filter cake twice to three times; and heating the filter cake to a temperature of 100 DEG C to remove water so as to obtain methyl stearate. According to the invention, methyl stearate is extracted from SBM raffinate by using an extractive crystallization method, methanol used twice in the extraction process can be repeatedly used after distillation, the lower layer obtained after separation can be reused as raffinate, and the advantages of small energy consumption and low cost are obtained.

Description

technical field [0001] The invention relates to a method for extracting methyl stearate from stearoylbenzoylmethane raffinate. Background technique [0002] Stearoylbenzoylmethane (SBM) raffinate is the raffinate left after the mother liquor is distilled to recover the solvent after the product is crystallized and separated during the production of SBM. The content of methyl stearate in the raffinate is about 60%. It is a conventional and effective method to extract methyl stearate by rectification, but the components of the SBM raffinate are complex, and most of the components have high boiling points, so the rectification tower that needs to be used can be carried out under very low pressure, so the energy The consumption is large and the cost is high. Contents of the invention [0003] In order to overcome the disadvantages of large energy consumption and high cost in the existing production process by rectification extraction, the purpose of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/24C07C67/58
Inventor 李兑黄先胜闫云奇陈新华张国靓
Owner ANHUI JIAXIAN FUNCTIONAL AUXILIARY
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