A kind of preparation method of low-ash sucrose fatty acid ester

A technology for sucrose fatty acid ester and fatty acid methyl ester, which is applied in the field of preparation of low-ash sucrose fatty acid ester, can solve the problems of low purity of sucrose fatty acid ester, high ash content of products, low degree of esterification of products, etc., and achieves esterification High density, low production cost, and the effect of reducing ash impurity content and acid value

Active Publication Date: 2018-08-28
ADANA FOOD TECH LIUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost, easy-to-operate, low-ash preparation method for sucrose fatty acid esters, so as to solve the problems of low product esterification degree, low purity of sucrose fatty acid esters and high ash content in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of low-ash sucrose fatty acid ester of the present invention comprises the following steps:

[0032] A. Add 5L of fatty acid methyl ester into the reaction kettle, and at the same time add 1.1L of potassium hydroxide aqueous solution with a concentration of 5mol / L, vacuumize to -0.1Mpa, and heat to 127°C with steam;

[0033] B, add 3.2kg sucrose powder in the material of step A, keep temperature to be 127 ℃, carry out 1.5 hours vacuum esterification, reaction product methyl alcohol enters methanol receiver after being cooled by condenser under vacuum state;

[0034] C. Add 6L of water to the reaction system after step B for dilution, and heat to 70°C, then pass the diluted solution through a strongly acidic ion exchange column for ion exchange to remove potassium ions, the temperature of the exchange column is kept at 70°C, and the flow rate is controlled at 150mL / min;

[0035] D. After the ion exchange is completed, heat in vacuum at 110° C. to ...

Embodiment 2

[0042] The preparation method of low-ash sucrose fatty acid ester of the present invention comprises the following steps:

[0043] A. Add 5L fatty acid methyl ester into the reaction kettle, and at the same time add 1.5L aqueous sodium hydroxide solution with a concentration of 5mol / L, vacuumize to -0.1Mpa, and heat to 130°C with steam;

[0044] B, add 3.5kg sucrose powder in the material of step A, keep temperature to be 130 ℃, carry out 1.8 hours vacuum esterification, reaction product methyl alcohol enters methanol receiver after being cooled by condenser under vacuum state;

[0045]C. Add 5L of water to the reaction system after step B for dilution, and heat to 75°C, then pass the diluted solution through the acidic ion exchange column for ion exchange to remove sodium ions. The temperature of the exchange column is kept at 75°C, and the flow rate is controlled. at 200mL / min;

[0046] D. After the ion exchange is completed, vacuum heating is carried out at 112° C. to remo...

Embodiment 3

[0053] The preparation method of low-ash sucrose fatty acid ester of the present invention comprises the following steps:

[0054] A. Add 5L of fatty acid methyl ester into the reaction kettle, and at the same time add 1.0L of potassium carbonate aqueous solution with a concentration of 5mol / L, vacuumize to -0.1Mpa, and heat to 135°C with steam;

[0055] B, add 2.8kg sucrose powder in the material of step A, keep temperature to be 135 ℃, carry out 2 hours vacuum esterification, reaction product methyl alcohol enters methanol receiver after being cooled by condenser under vacuum state;

[0056] C. Add 4L of water to the reaction system after step B to dilute, and heat to 80°C, then pass the diluted solution through an acidic ion exchange column for ion exchange to remove potassium ions, the temperature of the exchange column is kept at 80°C, and the flow rate is controlled at 250mL / min;

[0057] D. After the ion exchange is finished, heat in vacuum at 115° C. to remove water, ...

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Abstract

The invention discloses a method for preparing a low ash sucrose fatty acid ester, and the method comprises the following steps: A, esterification of fatty acid methyl ester and part of sucrose powder is performed in the presence of an alkaline catalyst, after the reaction is completed, water with the volume equivalent to 0.4-1 time of the volume of the product after the reaction is added for dilution, metal ions in the diluted solution are removed by ion exchange in an ion exchange column, and the alkaline catalyst is an alkaline metal salt or a metal hydroxide; and B, after the ion exchange is completed, water in the ion-exchanged material is removed, and after the removal of the water, sucrose powder is supplemented for continuous reaction. The method has the advantages of low cost and convenient operation, and can solve the problems of low esterification degree, low purity of the sucrose fatty acid ester and high ash content of the product in the prior art.

Description

technical field [0001] The invention relates to a method for synthesizing sucrose esters, in particular to a method for preparing low-ash sucrose fatty acid esters. Background technique [0002] Sucrose ester is a kind of green nonionic surfactant with sucrose as the hydrophilic group and fatty acid chain as the hydrophobic group, which has good biodegradability, so it can be widely used in food additives, detergents, cleaning agents and cosmetics industries , and also has potential application prospects in pharmaceuticals, biochemistry and biomedicine. The raw materials for the production of sucrose fatty acid esters are all cheap and easily available renewable resources, and have widely controllable hydrophilic-lipophilic balance values. In addition to good emulsifying properties, sucrose esters are fully biodegradable, environmentally friendly, non-toxic, skin-compatible, odorless and tasteless. [0003] However, in the application process of production technology, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H13/06C07H1/00
CPCC07H1/00C07H13/06
Inventor 王凯
Owner ADANA FOOD TECH LIUZHOU
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