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Method for extracting maize germ oil and recovering protein by water enzyme method

A technology of corn germ oil and protein, applied in the direction of edible oil/fat, food science, application, etc., can solve the problems of low oil yield, high production cost, and failure to meet market requirements, and achieve easy refining, easy handling, The effect of increasing the processing power of the device

Inactive Publication Date: 2005-01-12
JIANGNAN UNIV
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Problems solved by technology

[0007] Looking at home and abroad, there are still few studies on extracting oil from corn germ by aqueous enzymatic method, and the yield of oil is low, and the production cost is high, which cannot meet the requirements of the market.

Method used

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  • Method for extracting maize germ oil and recovering protein by water enzyme method

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Experimental program
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Embodiment 1

[0042]Weighing moisture content is 54.44% wet corn germ 6585.30g (dry corn germ is 3000g) and soaks in the citric acid solution of 0.01mol / L of 18L, carries out heat treatment in YX-400A double-deck vertical electric steam sterilizer, Control the temperature at 120°C, treat for 65 minutes, drain, and grind the drained material twice with a grinding wheel at a material-to-water ratio of 1:6 (dry basis) and add water. Add 2.5% (enzyme / dry matter) acid protease at natural pH (range about 3-3.5) at 40°C for 7 hours of enzymolysis; raise the temperature to 50°C, adjust the pH to 5.0, add 1.5% (enzyme / dry matter) Substance) cellulase, enzymolysis 12h. Direct centrifugation, free oil, emulsified layer, hydrolyzate and residue are obtained after centrifugation, and the yield of free oil can reach 87-91%.

[0043] Combine the hydrolyzate obtained by centrifugation with the soaking solution obtained after draining, and use a cut-off with a relative molecular mass of 150Da and an effect...

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Abstract

A process for extracting corn embyro oil and recovering protein includes immersing corn embryo in hot solution of citric acid, dripdrying, adding water, grinidng, and acidic proteinase and cellulase, enzymolyzing, centrifugal separating to obtain corn embryo oil, mixing the immersing liquid with separated liquid, nano-filter, vacuum concentrating, and spray drying to obtain protein.

Description

technical field [0001] The invention discloses a method for extracting corn germ oil by an aqueous enzymatic method and recovering protein, belonging to the technical field of an aqueous enzymatic oil extraction process. Background technique [0002] With the development of modern oil production technology, corn germ has become a resource-rich and cheap edible oil. Corn germ oil is a kind of vegetable oil extracted from corn germ. Corn germ accounts for 10-15% of corn weight, and corn germ oil accounts for about 50% of corn germ. [0003] Corn germ oil contains myristic acid 0.1-1.7%, palmitic acid 8-12%, stearic acid 2.5-4.5%, oleic acid 19-49%, linoleic acid 34-62%, linolenic acid 0-2.9%. The composition of fatty acids is better, most of which are unsaturated acids. The "essential fatty acid" content of corn germ oil is quite rich, which is higher in vegetable oil. At the same time, the provitamin A and vitamin D in corn germ oil are much richer than ordinary vegetable ...

Claims

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Application Information

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IPC IPC(8): A23D9/00C12P21/00
Inventor 王璋许时婴钱志娟张晓民袁博
Owner JIANGNAN UNIV
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