Good-color and high-esterification degree sucrose fatty acid polyester and preparation method thereof with simple technology

A technology of sucrose fatty acid and simple process, which is applied in the field of preparation of sucrose fatty acid polyester with a high degree of esterification and its simple process, can solve the problems of unstable phase transfer catalyst, cumbersome process treatment, difficult to remove, etc., and achieve the improvement of product color, luster, The process is simple and the effect of reducing variegation

Inactive Publication Date: 2019-03-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shen Jinyu and others synthesized sucrose polyester by using KOH with strong alkalinity as a catalyst, and cotton oil fatty acid ethyl ester as an acyl donor. In the first step, a large amount of fatty acid potassium soap was added, and the temperature was slowly raised to 130°C by pumping time. The second stage was in the same Add excess methyl ester at high temperature to continue the reaction, saponification is serious during the reaction process, and the process is cumbersome
Corrigan and Patrick et al. used the one-step synthesis method of tetramethylammonium stearate as a phase transfer catalyst, and carried out the transesterification reaction of synthetic sucrose polyester at 110 °C. This method effectively alleviated the coking reaction of sucrose, and the obtained polyester had good color And the yield reaches 78%, but the phase transfer catalyst is unstable during the reaction and difficult to remove

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Take 10.26 parts by mass of sucrose and add 50 parts by volume of DMF, raise the temperature to 70°C, and the pressure is 30KPa, remove the water vapor in the reaction system, and stir until the sucrose is completely dissolved. Weigh and add 28.35 parts by mass of methyl palmitate and 1.54 parts by mass of potassium carbonate powder, raise the temperature to 95°C, adjust the pressure to 20KPa, and continue stirring for 8 hours. The by-product methanol is removed by distillation during the reaction. After the reaction finishes, remove a large amount of reaction solvent by vacuumizing, add 80 parts by volume of n-butanol to the mixture system, add an appropriate amount of 5% sodium chloride aqueous solution after the product is completely dissolved, stir at 70°C for 30min, and then mix the mixture Pour it into a separatory funnel and let it stand for stratification for 5 minutes, separate the water phase, repeat this step until the water phase is a colorless and clear solu...

Embodiment 2

[0044] Take 10.26 parts by mass of sucrose and add 50 parts by volume of DMF, raise the temperature to 70°C, and the pressure is 30KPa, remove the water vapor in the reaction system, and stir until the sucrose is completely dissolved. Weigh and add 28.35 parts by mass of methyl palmitate and 1.54 parts by mass of potassium carbonate powder, raise the temperature to 95°C, adjust the pressure to 20KPa, and continue stirring for 8 hours. The by-product methanol is removed by distillation during the reaction. After the reaction finishes, remove a large amount of reaction solvent by vacuumizing, add 80 parts by volume of n-butanol to the mixture system, add an appropriate amount of 5% sodium chloride aqueous solution after the product is completely dissolved, stir at 70°C for 30min, and then mix the mixture Pour it into a separatory funnel and let it stand for stratification for 5 minutes, separate the water phase, repeat this step until the water phase is a colorless and clear solu...

Embodiment 3

[0048] Take 10.26 parts by mass of sucrose and add 50 parts by volume of DMF, raise the temperature to 70°C, and the pressure is 30KPa, remove the water vapor in the reaction system, and stir until the sucrose is completely dissolved. Weigh and add 28.35 parts by mass of methyl palmitate and 1.54 parts by mass of potassium carbonate powder, raise the temperature to 95°C, adjust the pressure to 20KPa, and continue stirring for 8 hours. The by-product methanol is removed by distillation during the reaction. After the reaction finishes, remove a large amount of reaction solvent by vacuumizing, add 80 parts by volume of n-butanol to the mixture system, add an appropriate amount of 5% sodium chloride aqueous solution after the product is completely dissolved, stir at 70°C for 30min, and then mix the mixture Pour it into a separatory funnel and let it stand for stratification for 5 minutes, separate the water phase, repeat this step until the water phase is a colorless and clear solu...

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Abstract

The invention belongs to the technical field of fine chemical engineering and discloses good-color and high-esterification degree sucrose fatty acid polyester and a preparation method thereof with a simple technology. The preparation method comprises the following steps: synthesizing low-esterification degree sucrose fatty acid polyester by a two-step process, and synthesizing the high-esterification degree sucrose fatty acid polyester, specifically: enabling sucrose to react (I) with partial fatty acid methyl ester to obtain the low-esterification degree sucrose fatty acid polyester, and enabling the low-esterification degree sucrose fatty acid polyester to react (II) with the remaining fatty acid methyl ester to obtain the high-esterification degree sucrose fatty acid polyester. The preparation method disclosed by the invention has the advantages of mild reaction conditions, simple technology and light product color; by combining solvent synthesis with solvent-free synthesis, the low-esterification degree sucrose fatty acid polyester is synthesized in relatively mild reaction conditions, wherein the esterification degree reaches 3-4; in a solvent-free synthesis stage, a catalystis added in batches, the esterification degree of the prepared high-esterification degree sucrose fatty acid polyester reaches 6-7, a product is white waxy solid powder with light color and little smell, and the needs in the daily chemical industry are met.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a sucrose fatty acid polyester with good color and high degree of esterification and a simple preparation method thereof. Background technique [0002] Sucrose fatty acid polyester (SPE) with high degree of esterification, also known as sucrose polyester or sucrose polyester, is a kind of nonionic surfactant derived from natural renewable resources, which has good biodegradability and toxicological properties. Mild and non-irritating to the skin and eyes, and easy to biodegrade, it is a kind of less polar oil-soluble surfactant obtained by replacing more than 5 hydroxyl groups on the sucrose molecule with fatty acids or fatty acid derivatives. Sucrose fatty acid polyester with high degree of esterification has hydrophilic and hydrophobic properties, and is a kind of excellent water-in-oil emulsifier. It is widely used in food, medicine, cosmetics and textile in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H13/06C07H1/00
CPCC07H1/00C07H13/06
Inventor 章莉娟王焕焕
Owner SOUTH CHINA UNIV OF TECH
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