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Diglyceride and preparation method and application thereof

A technology of diglyceride and glycerol, applied in the field of diglyceride and its preparation, can solve the problems such as the inability to achieve cold resistance effect and the like

Active Publication Date: 2010-07-07
嘉里特种油脂(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its cold resistance is only clear and transparent at 5°C, and it cannot achieve the cold resistance at low temperatures (0°C and below).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] Preparation method of diglyceride

[0036] Diglycerides provided by the invention can be prepared through the following steps:

[0037] The first step is to completely hydrolyze fat and / or oil under high pressure to obtain mixture I, which mainly contains fatty acids, preferably based on the total weight of mixture I, wherein the fatty acid content is more than 99%. The hydrolysis reaction is preferably carried out at 200-260°C, more preferably 240-250°C; the high pressure is preferably 2-8×10 6 Pascal, preferably 4-6 x 10 6 Pascal. The reaction can be carried out continuously or semi-continuously. The hydrolysis reaction can completely remove components such as phytosterols that are easy to cause product haze and precipitation, based on the total weight of the mixture I, the phytosterol content is less than 500ppm, more preferably less than 100ppm;

[0038] The second step is to fractionate mixture I at low temperature to obtain mixture II, which mainly contains un...

Embodiment 1

[0059] Preparation of diglycerides I

[0060] Add 5kg of refined sunflower oil and 3.3kg of water into the 10-liter high-pressure hydrolysis test equipment, 6 Under Pascal pressure, under vigorous stirring at 200°C, hydrolyze for 8 hours. The phytosterol content of the obtained fatty acid is less than 100ppm after detection and analysis. The obtained fatty acid is fractionated at 5° C., and the fractionation procedure is as follows (filtering temperature 5° C.):

[0061]

[0062]

[0063] Remove solid fatty acids (ie saturated fatty acids). Subsequently, 2988 g of the resulting liquid fatty acid (i.e. mixture II) was mixed with 576 g of glycerol and 36 g of NaOH, and reacted for 5 hours under a vacuum of 10 mbar and 180° C. After that, 90 g of 98% phosphoric acid was added for acidification for 30 min, and then 2% (W / W) was added Activated clay, filter the soap in it. The mixture that obtains passes through secondary molecular distillation (equipment mo...

Embodiment 2

[0067] Preparation of Diglycerides II

[0068] Add 5kg of refined sunflower oil and 3.3kg of water into a 10-liter high-pressure hydrolysis test equipment, stir vigorously at 240°C, and hydrolyze for 6 hours. The obtained fatty acid is fractionated at 2° C., and the fractionation procedure is as follows (filter temperature 2° C.):

[0069]

[0070] Remove solid fatty acids (ie saturated fatty acids). Subsequently, 2800 g of the resulting liquid fatty acid (i.e. mixture II) was mixed with 620 g of glycerol and 40 g of NaOH, and reacted for 5 hours under a vacuum of 10 mbar and 180 ° C. After that, 100 g of 98% phosphoric acid was added for acidification for 30 min, and then 2% (W / W) was added. Activated clay, filter the soap in it. The mixture that obtains passes through secondary molecular distillation (equipment model UIC KDL5), and primary molecular distillation condition is vacuum 1 * 10 -3 mbar, temperature 180°C, stirring 250rpm, the obtained heavy phase was ...

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PUM

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Abstract

The invention discloses diglyceride capable of still keeping clear under low temperature and a preparation method and an application thereof. The preparation method comprises the following steps: (1) performing hydrolysis reaction between fat or oil and water at the temperature of 200-260 DEG C and at the pressure of 2-8*10<6> Pa to obtain a mixture I; (2) extracting fatty acid in the compound I at the temperature of 5-0 DEG C to obtain a mixture II; (3) mixing liquid fatty acid and glycerol, and performing esterification reaction to obtain a mixture III; (4) performing molecular distillationand concentration on the mixture III to obtain a mixture IV; and (5) extracting the mixture IV at the temperature of 2-4 DEG C to obtain the diglyceride.

Description

technical field [0001] The invention relates to edible oils and fats, in particular to a diacylglycerol capable of maintaining clarity at low temperatures, a preparation method and application thereof. Background technique [0002] Diglyceride, as a functional oil that does not accumulate fat in the body, is used to replace triglyceride as a new type of healthy edible oil. The methods for preparing diglycerides mainly include esterification, glycerolysis and transesterification. [0003] In Chinese patent application 98808304.3, a method of partially hydrolyzing fat or oil to produce diglyceride is disclosed. An important purpose of this method is in order to keep the phytosterol that exists in vegetable oil as far as possible, and the meeting of phytosterol can influence the freezing property of the diglyceride obtained, therefore, the final product obtained by this method can't pass freezing test (0 ℃, 5.5 hours), which does not meet the consumption habits of Chinese con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/03C11C3/06A23D9/007
Inventor 张余权姜元荣马点平
Owner 嘉里特种油脂(上海)有限公司
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