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Deodorization method in ester synthesis

A technology of esters and polyglycerol esters, which is applied in the field of deodorization in the synthesis of esters, can solve the problems of prolonged reaction time, aggravated odor of polymerization products, unpleasant odor of polyglycerol esters, etc., to achieve environmental and human safety protection, Effects of reducing water consumption and water discharge, and solving unpleasant odors

Pending Publication Date: 2019-05-17
佛山市银美联合科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The key to the production of polyglycerol esters is the production of polyglycerol. The polymerization of polyglycerol needs to be carried out at high temperature. As the degree of polymerization of polyglycerol increases, the reaction time will continue to increase, the color of the product will continue to deepen, and it will be accompanied by serious side reactions. , leading to aggravation of the odor of the polymerization product
What cannot be avoided in the current production of polyglycerol esters is that polyglycerol esters will produce unpleasant odors during high-temperature synthesis, which seriously affects the application and promotion of polyglycerol esters.

Method used

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  • Deodorization method in ester synthesis

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Embodiment 1

[0034] A kind of deodorization method in ester synthesis, is characterized in that, comprises the following steps:

[0035] S1. Carry out the synthetic reaction of polyglycerol ester in the reaction kettle by means of staged heating;

[0036] S2. In the later stage of the reaction, adjust the vacuum inside the reactor to be -0.06-0.099MPa;

[0037] S3. In the exhaust stage, exhaust through the air riser and recover some materials;

[0038] In step S3, the unpleasant smell is removed by the tray group arranged in the gas riser.

[0039] Further, in step S2, the vacuum degree is -0.01MPa.

[0040] Further, in step S1, the processing method of stepwise heating is as follows: polyglycerol is added to the reactor, the temperature is raised to 50°C, a basic catalyst is added, the temperature is raised to 80°C with stirring, and fatty acid is added to react when the temperature is 60°C. Raise the temperature to 180°C and keep it for 0.5 hours, then slowly raise the temperature to ...

Embodiment 2

[0057] A kind of deodorization method in ester synthesis, is characterized in that, comprises the following steps:

[0058] S1. Carry out the synthetic reaction of polyglycerol ester in the reaction kettle by means of staged heating;

[0059] S2. In the later stage of the reaction, adjust the vacuum inside the reactor to be -0.06-0.099MPa;

[0060] S3. In the exhaust stage, exhaust through the air riser and recover some materials;

[0061] In step S3, the unpleasant smell is removed by the tray group arranged in the gas riser.

[0062] Further, in step S2, the vacuum degree is 0.06MPa.

[0063] Further, in step S1, the processing method of stepwise heating is as follows: adding polyglycerol to the reactor, raising the temperature to 105°C, adding a basic catalyst, stirring and raising the temperature to 180°C, and adding fatty acid to react when the temperature is 130°C, Raise the temperature to 230°C and keep it for 1 hour, then slowly raise the temperature to 298°C for ra...

Embodiment 3

[0071] A kind of deodorization method in ester synthesis, is characterized in that, comprises the following steps:

[0072] S1. Carry out the synthetic reaction of polyglycerol ester in the reaction kettle by means of staged heating;

[0073] S2. In the later stage of the reaction, adjust the vacuum inside the reactor to be -0.06MPa;

[0074] S3. In the exhaust stage, exhaust through the air riser and recover some materials;

[0075] In step S3, the unpleasant smell is removed by the tray group arranged in the gas riser.

[0076] Further, in step S1, the processing method of stepwise heating is as follows: polyglycerin is added to the reactor, the temperature is raised to 65°C, a basic catalyst is added, the temperature is raised to 95°C with stirring, and fatty acid is added to react when the temperature is 75°C. Raise the temperature to 195°C and keep it for 0.6 hours, then slowly raise the temperature to 260°C for rapid reaction, adjust the vacuum degree inside the reacto...

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Abstract

The invention provides a deodorization method in ester synthesis. The deodorization method in the ester synthesis is characterized by the following steps that S1, synthetic action of polyglycerol ester is carried out in a reaction kettle by adopting a temperature-gradient method; S2, at the end of the action, the vacuum degree in the reaction kettle is adjusted to -0.06-0.099MPa; and S3, air exhaust is carried out, specifically, air exhaust is carried out through an air rising pipe and parts of materials are recycled, in the S3, unpleasant odor is removed through a tower plate group arranged in the air rising pipe. The deodorization method in the ester synthesis solves the problem of the unpleasant odor generated in the production process of the polyglycerol ester, protects the environmentand human body personnel safety to a certain extent; and solves the problem of object cyclic utilization of distillation distilled off in the synthesis process of the polyglycerol ester, and reducesthe water supply volume and discharging of water.

Description

technical field [0001] The invention belongs to the technical field of chemical treatment, and in particular relates to a deodorizing method in the synthesis of esters. Background technique [0002] Polyglycerol fatty acid ester, referred to as polyglycerol ester, is a new type of nonionic surfactant with high efficiency and excellent performance. Because they have multiple surface properties such as good emulsification, dispersion, wetting, and stability, they can be decomposed in the process of human metabolism, thus participating in metabolism and being utilized by the human body. They are highly safe and have a wide range of applications. Especially in the food industry, food hygiene and safety are more and more concerned by people today. The development of non-toxic and environmentally friendly surfactants has become an important part of the research in the field of food additives. Polyglycerol fatty acid esters belong to such a class of additives. Its excellent safe...

Claims

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Application Information

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IPC IPC(8): C08G65/00C08G65/34
Inventor 李健龙洁芳
Owner 佛山市银美联合科技有限公司
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