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

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 ...

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