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A rapid detection method for the degree of transesterification reaction

A technology of transesterification reaction and detection method, which is applied in the direction of measuring devices, preparation of test samples, instruments, etc., can solve the problems of long detection time of the degree of transesterification reaction and affect the production efficiency of products, so as to shorten the detection time and reduce the change Influence, the effect of accurate judgment

Active Publication Date: 2019-02-15
GUANGZHOU NANQIAO FOOD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of rapid detection method of transesterification reaction degree, to solve the problem that the detection time of transesterification reaction degree in the prior art is too long, too slow, affects product production efficiency

Method used

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  • A rapid detection method for the degree of transesterification reaction
  • A rapid detection method for the degree of transesterification reaction
  • A rapid detection method for the degree of transesterification reaction

Examples

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Effect test

Embodiment 1

[0029] This example provides a rapid detection method for the degree of transesterification reaction, which is suitable for compound oils whose melting point change range is less than or equal to 1°C before and after the transesterification reaction. The rapid detection method includes the following steps:

[0030] Sample preparation: heat the sample before transesterification until it is clear and transparent, stir well and then take a sample; filter the sample after transesterification in a 60°C drying oven until it is clear and transparent, stir well and then take a sample. In this step, since some soaps and other impurities will be produced after the transesterification reaction, it is necessary to filter at a specific temperature and in a dry environment. In addition, since the sample to be tested is a complex type of oil, in order to obtain highly repeatable results, it is necessary to fully stir the sample before sampling.

[0031] Sampling: Use a flat-bottomed test tub...

Embodiment 2

[0038] This example provides a rapid detection method for the degree of transesterification reaction, which is suitable for compound oils whose melting point change range is less than or equal to 1°C before and after the transesterification reaction. The rapid detection method includes the following steps:

[0039] Sample preparation: heat the sample before transesterification until it is clear and transparent, stir well and then take a sample; filter the sample after transesterification in a 60°C drying oven until it is clear and transparent, stir well and then take a sample. In this step, since some soaps and other impurities will be produced after the transesterification reaction, it is necessary to filter at a specific temperature and in a dry environment. In addition, since the sample to be tested is a complex type of oil, in order to obtain highly repeatable results, it is necessary to fully stir the sample before sampling.

[0040] Sampling: Take a clear and transparent...

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Abstract

The invention relates to the technical field of a transesterification reaction test, in particular to a fast detection method of a transesterification reaction degree. The method comprises taking clear and transparent samples before and after transesterification; heating the samples before and after transesterification for melting to eliminate crystals in the samples; performing constant-temperature treatment on the melt samples before and after transesterification at 0 DEC C; performing constant-temperature treatment on the obtained samples before and after transesterification at 20 DEC C and testing the SFC value; performing constant-temperature treatment on the obtained samples before and after transesterification at 30 DEC C and testing the SFC value; and if after constant-temperature treatment at 20 DEG C and SFC value test, the difference between the SFC value of the sample after transesterification and the SFC value of the sample before transesterification is no less than 5%, and after constant-temperature treatment at 30 DEG C and SFC value test, the difference between the SFC value of the sample after transesterification and the SFC value of the sample before transesterification is no less than 3%, ending the transesterification reaction. The method shortens the time for judging the transesterification reaction degree.

Description

technical field [0001] The invention relates to the technical field of transesterification reaction testing, in particular to a rapid detection method for the degree of transesterification reaction. Background technique [0002] Chemical transesterification technology is a kind of oil modification technology used to change the physical properties of oil. Compared with the existing oil hydrogenation modification technology, the oil modified by chemical transesterification technology has the advantages of good flavor, unchanged composition of raw fatty acids (especially essential fatty acids), and no trans fatty acids. [0003] In the industrial production of oil industry, the effect of transesterification reaction is easily affected by factors such as catalyst, reaction temperature and raw material oil quality. If the transesterification reaction is not complete, the oil modified by transesterification reaction will be used in baking During the production of oil, it will lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08G01N1/28G01N1/44
CPCG01N1/28G01N1/44G01N24/088
Inventor 陈正文
Owner GUANGZHOU NANQIAO FOOD
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