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Method for preparing sucrose fatty acid ester

A technology of sucrose fatty acid ester and fatty acid methyl ester, which is applied in the field of catalysis, can solve the problems of large amount of soap used, difficult removal of phase transfer catalyst, and high cost, and achieve the effects of reduced amount, mild reaction conditions, and reduced energy

Inactive Publication Date: 2013-01-02
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of large soap consumption, high cost and difficult removal of phase transfer catalysts in the reaction of the above-mentioned solvent-free synthesis of sucrose fatty acid esters, and provide a new method for preparing sucrose esters

Method used

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  • Method for preparing sucrose fatty acid ester
  • Method for preparing sucrose fatty acid ester
  • Method for preparing sucrose fatty acid ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 0.058mol sucrose, 0.058mol methyl stearate, 10wt% potassium carbonate (based on the total mass of sucrose + methyl stearate, the same below), 20wt% potassium stearate (based on sucrose + the total mass of methyl stearate as the basis, the same below), catalyst D5wt% (based on the total mass of sucrose + methyl stearate, the same below), heat and stir for 30min, heat up to 110°C, and reduce pressure to -0.05MPa , reacted for 10h to stop the reaction, added a mixed extractant to wash and filter the phase transfer catalyst, washed away the sucrose, removed the solvent, dried in vacuum for 5 hours, and finally got the sucrose ester yield rate of 70.6%

Embodiment 2

[0064] Add 0.058mol of sucrose, 0.812mol of rapeseed oil methyl ester, 4wt% of potassium carbonate, and 3wt% of catalyst B into a 250ml four-neck flask, heat and stir for a period of time, raise the temperature to 130°C, reduce the pressure to -0.06MPa, and stop the reaction for 6 hours. The treatment method is the same as in Example 1, and the final yield of sucrose ester is 81.5%.

Embodiment 3

[0066] Add 0.058mol of sucrose, 0.116mol of methyl stearate, 2wt% of potassium carbonate, 10wt% of potassium stearate, and 4wt% of catalyst A to a 250ml four-neck flask, heat and stir for 30min, raise the temperature to 120°C, and vacuum-0.03 MPa, stop the reaction after 4 hours of reaction, the treatment method is the same as 1, and the yield of sucrose ester is 85.6%.

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Abstract

The invention belongs to the technical field of catalysts, and discloses a sucrose fatty acid ester preparation method. According to the invention, fatty acid ester and sucrose are adopted as raw materials; a catalyst, an emulsifier, and a tri-phase phase-transfer catalyst manufactured by bonding quaternary ammonium or phosphonium salts, polyethylene glycols, and crown ethers on a macromolecular high-polymer are added into the raw materials; and the sucrose fatty acid ester is obtained by catalytic synthesis. After the reaction, the phase-transfer catalyst can be repeatedly utilized. A yield can reach 85%. The method provided by the invention has the advantages that: (1) reaction conditions are mild, and product color is good; (2) the yield of the product is higher than that synthesized with a common non-solvent method; (3) the phase-transfer catalyst can be repeatedly used; (4) the phase-transfer catalyst is not left in the product, such that a problem of purification difficulty is solved, and a product can reach a foodstuff level; (5) the dosage of the emulsifier is reduced or even eliminated; and (6) the method is environment-friendly, energy-saving, and cost-saving.

Description

technical field [0001] The invention relates to a method for preparing sucrose fatty acid esters from sucrose and fatty acid esters using a three-phase phase transfer catalyst (P-PTC) of quaternary ammonium salts or quaternary phosphonium salts, polyethylene glycols, and crown ethers. technology field. Background technique [0002] Sucrose fatty acid ester is referred to as sucrose ester (SE), according to the US FDA-CFR No.172, 859 food regulations, it is a general term for a series of organic compounds formed by the reaction of normal carboxylic acid and sucrose; as a raw material produced from natural renewable resources The sucrose fatty acid ester is in full compliance with the development trend of green chemistry and is a green surfactant with excellent performance. Sucrose polyester can replace fat and be used in food processing industry. It has no or low energy and has basically the same physical and chemical properties as fat. It adapts to the development of modern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/06C07H1/00
Inventor 李为民陆朝阳陈建海邱玉华任庆功郭登峰姚超
Owner CHANGZHOU UNIV