Technique for separating and preparing rapeseed protein cogenerating rapeseed polyoses from the low-temperature cold pressing rapeseed dregs film

A technology of rapeseed protein and process method, which is applied in the field of low-temperature cold-pressed rapeseed meal membrane separation to prepare rapeseed protein for co-production of rapeseed polysaccharides, can solve the problems of rapeseed protein and rapeseed polysaccharides polluting the environment, and achieve good results Environmental friendliness, high purity and extraction rate, effect of increasing added value

Inactive Publication Date: 2009-11-11
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the environmental pollution problem of rapeseed protein and rapeseed polysaccharide in the existing production process, the present invention provides a process method for preparing rapeseed protein co-production rapeseed polysaccharide by membrane separation of low-temperature cold-pressed rapeseed meal

Method used

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  • Technique for separating and preparing rapeseed protein cogenerating rapeseed polyoses from the low-temperature cold pressing rapeseed dregs film

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Experimental program
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Effect test

Embodiment 1

[0024] see figure 1 The method for preparing rapeseed protein co-production rapeseed polysaccharide by membrane separation of low-temperature cold-pressed rapeseed meal comprises the following steps:

[0025] (1) Rapeseed impurity removal: separate and remove dust, sand, straw and other impurities;

[0026] (2) Cold-pressed rapeseed: press the rapeseed with a cold residue machine at a temperature lower than 100°C, and separate most of the oil to obtain coarse meal;

[0027] (3) degreasing of crude meal: leaching out the oil remaining in the crude meal with organic solvent n-hexane until the oil content in the crude meal is less than 0.5%, to obtain defatted rapeseed meal;

[0028] (4) Alcohol extraction: Add 95% ethanol to the defatted rapeseed meal in a ratio of 1:5 mass / volume (m / v), soak at 20-50°C for 3 hours, repeat the operation twice, and then vacuum dry to recover ethanol , to obtain alcohol-extracted rapeseed meal;

[0029] (5) Soaking: Alcohol-extracted rapeseed m...

Embodiment 2

[0036] The cut-off molecular weight of the ultrafiltration membrane used in the ultrafiltration device for separating rapeseed protein is 450kDa.

[0037] The ultrafiltration membrane used in the ultrafiltration device for separating rapeseed polysaccharides has a cut-off molecular weight of 3 kDa.

[0038] Others are with embodiment 1.

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Abstract

The invention discloses a technique for separating and preparing rapeseed protein cogenerating rapeseed polyoses by the low-temperature cold pressing of rapeseed dregs film, comprising the following steps: oil manufacture is carried out to rapeseed with the low-temperature cold pressing method (not more than 100 DEG C). Raffinate oil in the rapeseed dregs is leached with organic solvent in order, and ethanol is used to remove polysaccharide, address sugar, parts of pigment, and the like; then, ultrafiltration membrane concatenation is taken as the main separation technique to separate and purify rapeseed protein cogenerating rapeseed polyoses from low-temperature rapeseed dregs, and 500 kDa of ultrafiltration membrane are used to intercept rapeseed protein so as to obtain protein of which the defatted rapeseed quality is 75%; 3 to 5 kDa of ultrafiltration membrane are used to filter address sugar, pigment, inorganic salt and the like, so as to obtain rapeseed polyoses relative defatted rapeseed quality of which is 3.2%; at last, rapeseed protein and rapeseed polyoses solution are respectively dried into solid with a spray drying process and a vacuum drying process. The invention is favorable for environment protection, and the yield of rapeseed protein is above 75%; meanwhile, rapeseed polyoses relative defatted rapeseed quality of which is 3.2% is obtained.

Description

technical field [0001] The invention relates to a process for extracting rapeseed protein from rapeseed dregs and coproducing rapeseed polysaccharide. Background technique [0002] Rapeseed is an important oil crop in my country, widely distributed in the Yangtze River Basin and Northwest provinces. At present, the use of rapeseed meal in my country is quite limited, and it is only used as fertilizer or added in a small proportion as feed for ruminants and freshwater fish. This result is mainly caused by toxic and anti-nutritional ingredients such as glucosinolates, polyphenols, and phytic acid. Rapeseed meal contains rich trace elements such as protein, polysaccharide, phytic acid, polyphenol, choline, biotin, niacin, vitamin B1, B2, calcium, phosphorus, selenium, etc., all of which have high utilization value. Therefore, it is of great significance to increase the development and utilization of rapeseed meal and increase its utilization value in order to obtain new food ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K14/415C07K1/14C08B37/18
Inventor 孙汉巨姜绍通潘丽军罗水忠潘牧
Owner HEFEI UNIV OF TECH
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