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Technology for synthesizing polyester of cane sugar acids with high degree of esterification

A technology of sucrose fatty acid and high degree of esterification, applied in the directions of esterified saccharides, carbohydrate active ingredients, sugar derivatives, etc., can solve the problems of high cost, complicated steps, harsh implementation conditions, etc., and achieve the effect of improving efficiency

Inactive Publication Date: 2003-07-23
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In many existing technologies, some method steps are more complicated, some methods have harsh implementation conditions, and the cost is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a. Add 20 kg of anhydrous methanol and 3 kg of potassium hydroxide into a 600-liter reactor and stir. After the potassium hydroxide is completely dissolved at 30°C, add 60 kg of fatty acid methyl ester and react at 60°C for 1 Hour;

[0025] b. Then add 15 kg of sucrose and 1 kg of potassium carbonate, heat up to 90° C., vacuum distill to recover methanol.

[0026] c. Continue to heat up to 120°C for 2 hours under vacuum and stirring, then add 100 kg of fatty acid methyl ester, and continue to react for 1 hour at 120°C;

[0027] d. Pour the reacted material into the thin film evaporator. At 140°C, the material circulates between the thin film evaporator and the heavy component tank for 2 hours, the flow rate is controlled at 250 liters / h, and the vacuum is 1Pa. At this time, the fatty acid The methyl ester is not distilled out, only the methanol produced in the reaction is distilled out of the reaction system in time;

[0028] e, then the temperature of the thin film e...

Embodiment 2

[0033] a. Add 50 kg of absolute ethanol and 7 kg of potassium hydroxide into a 600-liter reactor and stir. After the potassium hydroxide is completely dissolved at 40°C, add 80 kg of fatty acid ethyl ester and react at 80°C for 3 Hour;

[0034] b. Then add 20 kg of sucrose and 5 kg of potassium carbonate, heat up to 110° C., vacuum distill to recover ethanol.

[0035] c. Continue to heat up to 140°C for 4 hours under vacuum and stirring, then add 120 kg of fatty acid ethyl ester, and continue to react for 3 hours at 140°C;

[0036] d. Pour the reacted material into a thin film evaporator and a molecular still. At 170°C, the material circulates between the thin film evaporator, the molecular still and the heavy component tank for 4 hours, and the flow rate is controlled at 300 liters / h. The vacuum degree is 10Pa, at this moment, fatty acid ethyl ester is not distilled out, only the ethanol produced in the reaction is distilled out of the reaction system in time;

[0037] e, t...

Embodiment 3

[0042] a. Add 40 kg of anhydrous methanol and 5 kg of potassium hydroxide into a 600-liter reactor and stir. After the potassium hydroxide is completely dissolved at 30-40°C, add 70 kg of fatty acid methyl ester, React for 2 hours;

[0043] b. Then add 17 kg of sucrose and 3 kg of potassium carbonate, heat up to 100° C., vacuum distill to recover methanol.

[0044] c. Continue to heat up to 130°C for 3 hours under vacuum and stirring, then add 110 kg of fatty acid methyl ester, and continue to react for 2 hours at 130°C;

[0045] d. Pour the reacted material into a molecular still. At 150°C, the material circulates between the molecular still and the heavy component tank for 3 hours. The flow is controlled at 270 liters / h and the vacuum is 5 Pa. At this time, the fatty acid The methyl ester is not distilled out, only the methanol produced in the reaction is distilled out of the reaction system in time;

[0046] e, then the temperature of the molecular still is raised to 200°...

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PUM

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Abstract

A process for synthesizing the polyester of glycofatty acid from methyl ester (or ethyl ester) of fatty acid features that the film evaporator or molecular distiller is used for cyclic distilling multiple times for increasing the reaction efficiency and esterifying degree while excessive methylester (or ethyl ester) can be distilled out.

Description

technical field [0001] The invention relates to a new process for synthesizing sucrose fatty acid polyester with a high degree of esterification. The process adopts a thin film evaporator or a molecular still for repeated distillation Background technique [0002] Sucrose fatty acid polyester has attracted more and more domestic and foreign scientific research and medical institutions' attention because of its excellent fat substitute and weight loss function, and they are competing to develop products in food, medicine and other fields. [0003] In several existing patents, a solvent-free method and a two-step method are used to prepare sucrose fatty acid polyesters (U.S. Pat. No. 3,963,699, U.S. Pat. No. 4,517,360, No. 4,517,360, U.S. Pat. No. 4,518,772); [0004] In addition, U.S. Patents (U.S. Pat. No. 3,558,597, U.S. Pat. No. 3,644,333, and U.S. Pat. No. 3,792,041) have prepared sucrose fatty acid polyester products with a lower degree of ester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23K20/158A23L33/12A61K31/70B01D1/22B01D3/12B01D11/00C07H13/06
Inventor 吾满江・艾力努尔买买提董昕张亚刚阿依夏木文彬
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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