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Method for preparing starch aliphatic ester by enzyme catalysis

A starch fatty acid ester, catalytic preparation technology, applied in the direction of fermentation, etc., can solve the problems of unsuitable products and high requirements for reaction conditions, and achieve the effect of simple production equipment, wide source of raw materials, and mild reaction conditions

Inactive Publication Date: 2011-02-16
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this reaction, the reaction conditions are relatively high, there is a high temperature and high pressure reaction, and acid hydrolysis is required at the same time, the product does not meet the requirements of food processing, and both the reaction conditions and product quality need to be further improved

Method used

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  • Method for preparing starch aliphatic ester by enzyme catalysis
  • Method for preparing starch aliphatic ester by enzyme catalysis
  • Method for preparing starch aliphatic ester by enzyme catalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A method for preparing starch fatty acid ester by enzyme catalysis, the steps are as follows:

[0049] (1) Mix 20 weight units of stearic acid with 6 weight units of starch, add 1 weight unit of sodium pyrophosphate and 0.6 weight units of lipase after the solution is melted, and then react at a constant temperature. Time: 42h, the starch fatty acid ester crude product was obtained;

[0050] The lipase LipozymeTL IM was purchased from Novozymes and activated with 2.5% sodium chloride solution.

[0051] (2) adding organic solvent n-hexane to the above-mentioned powdered fatty acid ester crude product, then leaching and centrifuging, separating excessive stearic acid, and simultaneously organic solvent and stearic acid are reclaimed;

[0052] (3) add distilled water in the crude product after extraction, to dissolve the sodium pyrophosphate in the crude product, wash in three times, suction filter after washing, dry at 40 DEG C, obtain starch stearate after drying, by me...

Embodiment 2

[0054] A method for preparing starch fatty acid ester by enzyme catalysis, the steps are as follows:

[0055] (1) Mix 20 weight units of palmitic acid with 6 weight units of starch, add 1 weight unit of sodium pyrophosphate and 0.6 weight units of lipase after the solution is melted, and then react at a constant temperature, constant temperature conditions: 65 ° C, reaction time : 42h, obtain starch fatty acid ester crude product;

[0056] The lipase LipozymeTL IM was purchased from Novozymes and activated with 2.5% sodium chloride solution.

[0057] (2) add organic solvent normal hexane in above-mentioned powdery fatty acid ester crude product, then lixiviate and centrifuge, separate excessive palmitic acid, organic solvent and palmitic acid are reclaimed simultaneously;

[0058] (3) Add distilled water to the crude product after extraction to dissolve the sodium pyrophosphate in the crude product, wash in three times, filter with suction after washing, dry at 40°C, and obta...

Embodiment 3

[0060] A method for preparing starch fatty acid ester by enzyme catalysis, the steps are as follows:

[0061] (1) Mix 20 weight units of myristic acid with 6 weight units of starch, add 1 weight unit of sodium pyrophosphate and 0.6 weight units of lipase after the solution is melted, and then react at a constant temperature. The constant temperature conditions are: 65°C, Reaction time: 42h, the starch fatty acid ester crude product was obtained;

[0062] The lipase LipozymeTL IM was purchased from Novozymes and activated with 2.5% sodium chloride solution.

[0063] (2) adding the organic solvent n-hexane to the above-mentioned fatty acid ester crude product, then extracting and centrifuging to separate excess myristic acid, and reclaim the organic solvent and myristic acid simultaneously;

[0064] (3) Add distilled water to the crude product after extraction to dissolve the hydrated salt sodium pyrophosphate in the crude product, wash in three times, suction filter after wash...

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Abstract

The invention relates to a method for preparing starch aliphatic ester by enzyme catalysis, which has the specific operation as follows: mixing fatty acid and starch, adding a proper quantity of hydrous salt and lipase, and reacting at the temperature of 55-75 DEG C for 12-72h. Organic solvent is used to remove fatty acid, and distilled water is used to remove hydrous salt, and the starch aliphatic ester is obtained by drying. The invention adopts the method that lipase serves as catalyst to prepare the starch aliphatic ester, has the advantages of abundant raw material resource, moderate reaction condition, low energy consumption, no side product, low starch destructiveness, easy purification of products, simple production equipment and the like, and does not need high temperature or high pressure and acid-base reagent. The obtained product has the degree of substitution of 0.01-0.02.

Description

technical field [0001] The invention belongs to the technical field of preparation of edible emulsifiers, and relates to emulsifiers of starch fatty acid esters, in particular to an enzyme-catalyzed method for preparing starch fatty acid esters. Background technique [0002] Starch fatty acid ester belongs to a long-chain fatty acid starch ester. It is an esterification product obtained by reacting starch and its derivatives with fatty acid, fatty acid methyl ester or fatty acid anhydride. Due to the introduction of fatty acid hydrophobic groups into starch molecules, fatty acid Starch esters increase the dual properties of hydrophilicity and lipophilicity, and have emulsifying properties. Such products are widely used in food processing, pharmaceutical preparation, biological products and other industries. [0003] At present, the synthesis methods of starch fatty acid ester mainly include organic solvent method, melting method and water method. The organic solvent method ...

Claims

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Application Information

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IPC IPC(8): C12P7/64
Inventor 孙平张少科陈媛媛
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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