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Production method of corn separation protein

A technology for separating protein and corn, applied in the field of new corn protein isolate powder and its extraction process, can solve the problem of not specifying the protein content of corn gluten meal, and achieve the effects of shortening production process, reducing cost and high efficiency

Active Publication Date: 2009-03-25
CHINA NAT RES INST OF FOOD & FERMENTATION IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw corn germ used in the patent is a raw material different from ordinary corn gluten powder, and the patent does not indicate the protein content of the obtained corn gluten powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 150g of corn gluten powder, add 2.5L of water, and stir evenly. Adjust the pH of the feed liquid to 8 with NaOH solution, heat the feed liquid to 50°C, and keep stirring in a water bath for 60 min. Centrifuge the feed liquid for 20 minutes in a centrifuge, discard the supernatant, collect the bottom layer of insoluble slag, then continue to add 2.5Kg of water to the insoluble slag, stir evenly, and stir in a 50°C water bath for 60 minutes. The feed liquid was centrifuged for 20 minutes, the supernatant was discarded, and the bottom layer of insoluble residue was collected. Spray drying to obtain 98g corn protein isolate powder.

Embodiment 2

[0024] Take 150g of corn gluten powder, add 1.5L of water, and homogenize with a homogenizer. Adjust the pH of the feed liquid to 11 with NaOH solution, heat the feed liquid to 80°C, and keep stirring in a water bath for 40 min. The feed liquid was centrifuged in a high-speed centrifuge for 30 minutes, the supernatant was discarded, and the bottom insoluble slag was collected. Add 1.5 kg of water to the insoluble slag, and stir in a water bath at 80°C for 40 minutes; centrifuge the feed solution for 30 minutes, discard the supernatant, and collect the bottom layer of insoluble slag; vacuum dry and pulverize to obtain 105 g of corn protein isolate powder.

Embodiment 3

[0026] Take 600g of corn gluten powder, add 5L of water, and emulsify with an emulsifier. Adjust the pH of the feed solution to 13 with NaOH, heat the feed solution to 100°C, and keep stirring in a water bath for 20 minutes. Centrifuge the feed liquid in a high-speed centrifuge for 15 minutes, remove the supernatant, and collect the bottom layer of insoluble slag. Continue to add 1.25Kg of water to the insoluble slag, and stir in a water bath at 100°C for 20 minutes. The feed liquid was centrifuged for 15 minutes, the supernatant was discarded, and the bottom layer of insoluble slag was collected. Dried into powder, get 415g corn protein isolate powder.

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PUM

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Abstract

The invention takes the by-product corn gluten (also known as corn gluten meal, containing about 60% protein) produced in the corn starch production as raw material and adopts the alkali-heat treatment, so that the insoluble amylose and amylopectin in the corn gluten can be gelatinized and removed in the high-temperature aqueous alkali, and the oil and fat suspension in the corn gluten is processed with saponification reaction in the high-temperature aqueous alkali to make oil and fat separation; moreover, the structure of the fat-soluble yellow pigment in the corn gluten is damaged under high-temperature and high-alkaline conditions, so the fat-soluble yellow pigment is water-soluble and removed; after repeated washing, purifying, separating and drying processes, the corn-isolated protein with the protein content reaching more than 90% is obtained; therefore, the invention develops a new protein material for the food industry.

Description

technical field [0001] The invention relates to a new product of corn protein isolate powder and its extraction technology, belonging to the technical field of deep processing of agricultural products. Background technique [0002] At present, my country's annual corn production is about 110 million tons, accounting for 20% of the world's total production, ranking second, of which nearly 4 million tons are used to produce starch. The by-product of corn starch is called corn gluten meal (CGM), also known as "corn yellow powder". Corn gluten powder contains about 60% protein. Because of its many impurities, poor color and taste, lack of essential amino acids such as lysine and tryptophan, and low biological value, it has seriously affected its use in the food industry. Application, currently corn gluten meal is mainly used in the feed industry. [0003] Corn gluten powder is obtained by wet grinding corn to obtain coarse starch milk, then separating protein to obtain gluten ...

Claims

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Application Information

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IPC IPC(8): A23J1/12
Inventor 蔡木易易维学谷瑞增马勇董哲郭晖马永庆
Owner CHINA NAT RES INST OF FOOD & FERMENTATION IND CO LTD
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