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Preparation method of dextrin palmitate

A technology of dextrin palmitate and palmitic acid, which is applied in the field of preparation of dextrin palmitate and dextrin palmitate, can solve the problems of low synthesis yield, complex preparation process, and poor product performance, and achieve synthetic production High efficiency, simple preparation method and stable product performance

Inactive Publication Date: 2020-05-15
勤生高新材料科技(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current demand for dextrin palmitate in my country mainly depends on imports, and its output is far from meeting the needs of cosmetic manufacturers for dextrin palmitate.
[0003] However, the existing method for preparing dextrin palmitate has the disadvantages of low synthetic yield, complex preparation process, and poor product performance, which cannot meet market demand.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for preparing dextrin palmitate provided by the present invention includes the following steps in sequence:

[0019] 1) Disperse 50.4g of dextrin in 1000ml of dimethylformyl and heat to 150°C;

[0020] 2) Add 89.6 g of palmitic acid to step 1) and stir uniformly, then add 7 g of sulfamic acid, and collect the solid after reacting at 155°C for 8 hours.

[0021] 3) Wash the reacted product with methanol 3 times, collect the solid after washing 3 times with water, and dry it at 120°C for 4 hours. After crushing, the iron filings that may be produced by the powder are absorbed by magnetic separation to obtain light yellow-brown dextrin palmitate powder 113g.

Embodiment 2

[0023] The method for preparing dextrin palmitate provided by the present invention includes the following steps in sequence:

[0024] 1) Disperse 50.4g dextrin in 1000ml dimethylformyl and heat to 160°C;

[0025] 2) Add 89.6 g of palmitic acid to step 1) and stir uniformly, then add 7 g of tranexamic acid, and collect the solid after reacting at 160°C for 12 hours.

[0026] 3) Wash the reacted product with methanol for 5 times, collect the solid after washing twice with water, and dry it at 120°C for 4 hours. After pulverization, the iron filings that may be produced by the powder are absorbed by magnetic separation to obtain a light yellow-brown paste. 121g of palmitate powder.

Embodiment 3

[0028] The method for preparing dextrin palmitate provided by the present invention includes the following steps in sequence:

[0029] 1) Disperse 50.4g dextrin in 1000ml dimethylformyl and heat to 155°C;

[0030] 2) Add 76.8 g of palmitic acid to step 1) and stir uniformly, then add 7 g of tranexamic acid, and collect the solid after reacting at 155°C for 10 hours.

[0031] 3) Wash the reacted product with methanol 4 times, collect the solid after washing 4 times with water, and dry it at 120°C for 4 hours. After crushing, the iron filings that may be produced by the powder are absorbed by magnetic separation to obtain light yellow-brown dextrin Palmitate powder 99.2g.

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PUM

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Abstract

The invention discloses a preparation method of dextrin palmitate, and aims to provide dextrin palmitate which is simple in preparation method, high in synthesis yield and stable in prepared product performance. The preparation method sequentially comprises the following steps: 1) dispersing dextrin in an amide solvent, and heating to 150-160 DEG C; 2) adding palmitic acid into the mixture obtained in the step 1), uniformly stirring, adding sulfamic acid, and carrying out a reaction at the temperature of 150-160 DEG C for 8-12 h, and 3) washing the reaction product with alcohol for 3-5 times,washing with water for 2-3 times, collecting solids, drying, crushing, and performing magnetic separation, and thus obtaining the product. The invention belongs to the technical field of synthesis.

Description

Technical field [0001] The invention relates to a dextrin palmitate, in particular to a preparation method of dextrin palmitate; it belongs to the technical field of synthesis. Background technique [0002] Dextrin palmitate AS No. 83271-10-7 has the functions of improving the ductility of cosmetics, stabilizing emulsification, and improving the touch of wax. It is usually used as an additive in cosmetics. However, the current demand for dextrin palmitate in my country is mainly dependent on imports, and its output is far from meeting the needs of cosmetic manufacturers for dextrin palmitate. [0003] However, the existing preparation method of dextrin palmitate has the disadvantages of low synthesis yield, complicated preparation process, and poor product performance, which cannot meet market demand. Summary of the invention [0004] In view of the above-mentioned problems, the object of the present invention is to provide a dextrin palmitate with simple preparation method, high s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 代春娥
Owner 勤生高新材料科技(广州)有限公司
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