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Winterization method for microbial oil

A microbial oil and winterization technology, which is applied in the direction of fat production, fat oil/fat refining, etc., can solve the problems of poor winterization effect and complicated winterization process, and achieve the effects of content reduction, refreshing taste, and improvement of physical and chemical indicators

Inactive Publication Date: 2019-01-22
梁云
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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 method for winterizing microbial oils in order to overcome the problems of poor winterization effect and complex winterization process in the prior art. The method provided by the invention has the advantages of simple process, good removal effect of harmful fatty acids, The advantages of good low-temperature solidification performance of chemical oil

Method used

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  • Winterization method for microbial oil
  • Winterization method for microbial oil
  • Winterization method for microbial oil

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Use the refined oil of Mortierella alpina oil, and winterize it according to the following steps.

[0020] 1) Dehydration: Heat the grease after water washing, degumming and alkali refining to 85°C, and dehydrate under negative pressure of -0.1MPa for 35 minutes.

[0021] 2) Winterization at room temperature: the dehydrated oil will naturally cool down, and the oil temperature will drop to 20°C to maintain crystal growth. Winterization time at room temperature is 8 hours.

[0022] 3) Filtration: The oil after regular warming and winterization is filtered by a plate and frame filter press, the filter medium is industrial filter cloth, the filter pressure is 0.3MPa, and the ambient temperature is 18°C ​​during the plate and frame filter press.

[0023] 4) Re-dehydration: heat the filtered oil to 85°C, and dehydrate under negative pressure of -0.1MPa for 30 minutes.

[0024] 5) Low temperature winterization: the dehydrated oil is cooled according to the set program, and ...

Embodiment 2

[0033] Using the refined oil of Schizochytrium oil, the steps and parameters of the winterization treatment are the same as those in Example 1.

Embodiment 3

[0035] Use the refined oil of Mortierella alpina oil, and winterize it according to the following steps.

[0036] 1) Dehydration: Heat the grease after water washing, degumming and alkali refining to 85°C, and dehydrate under negative pressure of -0.1MPa for 35 minutes.

[0037] 2) Winterization at room temperature: the dehydrated oil will naturally cool down, and the oil temperature will drop to 25°C to maintain crystal growth. The winterization time at room temperature is 24 hours.

[0038] 3) Filtration: Use a plate and frame filter press to filter the oil after regular warming and winterization. The filter medium is industrial filter cloth, the filter pressure is 0.2MPa, and the ambient temperature is 18°C ​​during the plate and frame filter press.

[0039] 4) Re-dehydration: heat the filtered oil to 85°C, and dehydrate under negative pressure of -0.1MPa for 30 minutes.

[0040] 5) Low temperature winterization: the dehydrated oil is cooled according to the set program, ...

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Abstract

The invention relates to the technical field of microbial fermentation, and discloses a winterization method for microbial oil. The method comprises the following steps: dehydrating microbial oil, gradually cooling to 20-35 DEG C, carrying out winterization at room temperature for 8 to 24 hours to make saturated fatty acid with a high melting point form crystals, filtering by a plate-and-frame filter press, removing solid crystals, dehydrating, carrying out programmed cooling to -8 to 15 DEG C for low temperature winterization for 24-96 h to make fatty acid with a high melting point in the oilfurther form crystals, and removing by filtration. Through the method, the content of fatty acid with relatively high saturability in the oil can be reduced, relative content of polyunsaturated fattyacids is increased, coagulability of the oil can be improved and good clarity and fluidity can be maintained.

Description

technical field [0001] The invention relates to the field of oil extraction and purification, in particular to a method for winterizing microbial oil. Background technique [0002] Winterization is a method of removing undesired high-melting-point fatty acids in oils by slowly cooling and filtering oils so that high-melting-point fatty acids form crystals and precipitate from oils. It is often used to improve the low-temperature solidification performance of oils and keep oils in the desired clarity. degree and mobility. [0003] The current winterization process mostly adopts a single low temperature and constant temperature winterization process, and the winterization effect is poor; in order to increase the winterization effect, there is also a winterization method of adding organic solvents to oils, which must be completely removed before actual use. Avoiding the impact on human health has caused the complexity of the process and affected the use. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/00
CPCC11B3/001
Inventor 瞿瀚鹏曹晟王身健
Owner 梁云
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