Method for fractionating and crystallizing palm oil

A palm oil and crystallization technology, which is applied in the direction of fat oil/fat separation and fat generation, can solve the problems of low palm oil crystallization efficiency and shorten the time of grease crystallization, so as to shorten the overall time, reduce processing steps, and crystallization efficiency Improved effect

Inactive Publication Date: 2015-01-21
TIANJIN LONGWIT OILS & GRAINS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Still another object of the present invention is to solve the problem that the crystallization efficiency of palm oil with lower stearic acid content is not high, can shorten the time of grease crystallization and improve the yield of liquid palm oil during the fractionation and crystallization of palm oil, so that the yield increased to about 50%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Oil feed: Add palm oil with a melting point of 26°C accounting for 10% of the total mass of the mixed oil to the palm oil to be fractionated, mix the two fully and evenly, and transport them to a crystallization tank for temporary storage .

[0033](2) Heating: Heat the mixed oil to 50°C in a water bath for crystal breaking treatment, raise the temperature to 60°C and keep it for 60 minutes to fully melt. The overall heating time is 4 hours.

[0034] (3) Crystallization: Use a stirrer to cool the oil with a temperature difference of 3-5°C per minute at a stirring speed of 40Hz. After the temperature drops to 18°C, reduce the frequency to 30Hz and cool down to the oil with a temperature difference of 0.5-1°C per minute. The crystallization temperature point; the overall crystallization time is about 15h.

[0035] (4) Crystal growth: The crystal nuclei combine to form larger particles, which become larger and larger as time goes on; the crystal growth time is 5h.

...

Embodiment 2

[0039] (1) Oil feed: Add palm oil with a melting point of 28°C, which accounts for 11% of the total mass of the mixed oil, to the palm oil to be fractionated, so that the two are fully mixed evenly, and transported to a crystallization tank for temporary storage .

[0040] (2) Heating: Heat the mixed oils to 60°C in a water bath for crystal breaking treatment, raise the temperature to the highest temperature of 70°C and keep it for 55 minutes to fully melt; the overall heating time is 3 hours.

[0041] (3) Crystallization: Use a cooling stirrer to cool the oil with a temperature difference of 3-5 °C per minute at a stirring speed of 50 Hz. After the temperature drops to 19 °C, reduce the frequency to 30 Hz and cool down to 0.5-1 °C per minute. The crystallization temperature point of oil; the overall crystallization time is about 18h.

[0042] (4) Crystal growth: crystal nuclei combine to form larger particles, which become larger and larger as time goes on, and the crystal g...

Embodiment 3

[0046] (1) Oil feed: Add palm oil with a melting point of 30°C, which accounts for 15% of the total mass of the mixed oil, to the palm oil to be fractionated, to fully mix the two, and transport them to a crystallization tank for temporary storage.

[0047] (2) Heating: Heat the mixed oil to 70°C in a water bath for crystal breaking treatment, raise the temperature to the highest temperature point of 75°C and keep it for 40 minutes to fully melt; the overall heating time is 2 hours.

[0048] (3) Crystallization: Use a stirrer to cool the oil with a temperature difference of 3-5°C per minute at a stirring speed of 60Hz. After the temperature drops to 20°C, reduce the frequency to 30Hz and cool down to the oil with a temperature difference of 0.5-1°C per minute. The crystallization temperature point; the overall crystallization time is about 20h.

[0049] (4) Crystal growth: The crystal nuclei combine to form larger particles, which become larger and larger as time goes on. The ...

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Abstract

The invention discloses a method for fractionating and crystallizing palm oil. Through the adoption of the method, not only is the crystallizing efficiency of the palm oil with the lower content of stearic acids improved, but also the yield of liquid palm oil is improved. The method comprises five steps of oil feeding, heating and crystal destruction, cooling and crystallization, crystal maintenance and filtration, wherein the step of the oil feeding comprises the steps of adding palm oil fat of which the melting point is 26-30 DEG C to palm oil fat to be fractionated, and mixing the two kinds of palm oil fat.

Description

technical field [0001] The invention relates to the field of palm oil preparation methods, in particular to a palm oil fractionation and crystallization method. Background technique [0002] Palm oil is the oil extracted from the palm fruit on the oil palm tree. Palm oil is rich in nutrients and antioxidant properties, and is widely used in the food industry and chemical industry. Palm oil can be fractionated, that is to say, through subsequent processing, palm oil can be divided into several products with different melting points. The main component of some products is stearic acid, which generally has a high melting point and is semi-solid or solid at room temperature; some products are mainly palmitic acid (oleic acid), which generally has a low melting point and is liquid at room temperature. The melting point of stearin is generally 50°C, and the melting point of soft fat is generally about 24°C. For palm oil with low stearic acid content, during the cooling process o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B7/00
CPCC11B7/00C11B7/0075
Inventor 张世杰雷文忠王亮沙宪洲王志刚张宏杰
Owner TIANJIN LONGWIT OILS & GRAINS IND CO LTD
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