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A kind of processing method of soybean protein isolate with low starch content or no starch

A soybean protein isolate and processing method technology, which is applied in the field of soybean protein processing, can solve the problems of high starch content and limited protein application, and achieve the effect of expanding the scope of application, expanding the scope of application, and widening the application range of products

Active Publication Date: 2021-01-12
SHANDONG YUWANG ECOLOGY FOOD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] High starch content, which limits the application of protein in some aspects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0028] (1) Soybean meal extraction: extract at a water-to-material ratio of 12:1, adjust the pH of the alkaline water to 7.5, adjust the extraction temperature to 45°C, stir at 70r / min, extract for 30min, and then use a horizontal separator to separate and remove the bean dregs and other insoluble components in lye to obtain soybean protein extract;

[0029] (2) Starch degradation: the extract enters the heating pipeline and is heated by steam. After heating, the temperature of the extract is 80°C, and the heating time is guaranteed to be 1min. Then it enters the condenser for condensation treatment, and the temperature drops to 50°C. The gelatinized extract Enter the enzymatic hydrolysis tank for enzymolysis, using fungal amylase or α-amylase, the enzymolysis temperature is 50°C, the time is 30min, and the addition amount is 5%;

[0030] (3) Starch separation: the enzymatic hydrolysis solution enters the acid precipitation tank, and acid is added to adjust the pH to 4.4, and ...

Embodiment example 2

[0034] (1) Soybean meal extraction: extract at a water-to-material ratio of 12:1, adjust the pH of alkaline water to 8.0, adjust the extraction temperature to 50°C, stir at 70r / min, and extract for 35min. Then carry out a horizontal separator to separate and remove components insoluble in lye such as bean dregs to obtain soybean protein extract;

[0035] (2) Starch degradation: the extract enters the heating pipeline and is heated by steam. After heating, the temperature of the extract is 85°C, and the heating time is guaranteed to be 1min. The enzymolysis temperature is 85°C, the time is 40min, and the addition amount is 3%;

[0036] (3) Starch separation: the enzymatic solution enters the acid precipitation tank, add acid to adjust the pH to 4.6, and the acid precipitation time is 30 minutes to precipitate the protein, and then use the rotor pump to pump the acid precipitation mixture into the 1# acid precipitation separator for primary separation , once the curd is reached...

Embodiment example 3

[0040] (1) Soybean meal extraction: extract at a water-to-material ratio of 12:1, adjust the pH of alkaline water to 7.8, adjust the extraction temperature to 48°C, stir at 70r / min, and extract for 32nin. Then carry out a horizontal separator to separate and remove components insoluble in lye such as bean dregs to obtain soybean protein extract;

[0041] (2) Acid precipitation separation: the extract enters the acid precipitation tank, and acid is added to adjust the pH to 4.5. The acid precipitation time is 30 minutes to precipitate the protein, and then the acid precipitation mixture is pumped into the acid precipitation separator with a rotor pump for separation to obtain curd ;

[0042] (3) Curd neutralization: After adding water to the curd, carry out neutralization treatment, adjust the pH to 7.1, and obtain a neutralization solution;

[0043] (4) Sterilization and drying: the neutralizing solution is sterilized in a sterilizer at 135°C, dried at 165°C after cooling dow...

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Abstract

The invention discloses a processing method of soybean protein isolate with low starch content or no starch. The processing method of the soybean protein isolate with low starch content or no starch specifically comprises the following steps of extracting soybean meal, degrading starch, separating degraded starch, neutralizing curd, and carrying out sterilization and drying. The soybean protein isolate obtained by the processing method is extremely low in starch content or free of starch; and thus, the soybean protein isolate has wide application range so that application range of the soybean protein isolate is better expanded.

Description

technical field [0001] The invention relates to a processing technology of soybean protein, in particular to a processing method of soybean protein isolate with low starch content or no starch. Background technique [0002] The production process of soybean protein isolate is based on the principle of alkali dissolution and acid precipitation for separation and production. The principle of alkali dissolution is to dissolve protein in weakly alkaline water to separate soybean fiber and soybean protein, and then acid-precipitate at the isoelectric point of protein to precipitate soybean protein and separate small molecular sugars and albumin. [0003] In the actual production process, the soybean meal is dissolved, then extracted, acid-precipitated, alkali-neutralized, then sterilized, and finally dried to remove the water in the protein solution to make a dry powder. In the actual processing process, the influence on the starch content is limited, and the starch will remain ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23J3/16A23J3/34
CPCA23J3/16A23J3/346
Inventor 牛祥臣刘汝萃刘军李成辉王吉龙
Owner SHANDONG YUWANG ECOLOGY FOOD IND
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