CN1689430A - Modification method of soybean protein concentrate - Google Patents

Abstract

The present invention is concentrated soybean protein modifying method and features that water insoluble protein obtained through low temperature separation of defatted soybean residue is produced into concentrated protein powder in high water solubility through water dilution, pH regulation, heating, homogenization, drying and other steps. The concentrated protein powder has water solubility as high as 70-80 %, protein content of 67-70 %, processing performance of being emulsified, thickened, gelatinized, etc. and expanded use range. In addition, the process of the present invention has low cost, less pollution and good product taste.

Description

A kind of method of modifying of FSPC

Technical field

The present invention relates to soybean deep processing field, more particularly, is a kind of method of modifying of FSPC.

Background technology

The production principle of traditional alcohol processed soybean protein concentrate is to utilize soybean protein to be insoluble to ethanol and when ethanol concentration expressed in percentage by volume minimum this characteristic of soy proteinaceous solubility during for 60-65%, adopt alcohol washing bean cake powder aborning, after removing pure dissolubility carbohydrate, protein,alcohol-soluble and ash content, make alcohol processed soybean protein concentrate through separation, drying again.

The technical process of traditional alcohol processed soybean protein concentrate: (Zhang Zhi is strong to compile low-temperature defatted big dregs of beans-pulverizing-alcohol extract-water-soluble-spray-drying-FSPC, " novel bean product processing technology and prescription ", scientific and technical literature publishing house, January calendar year 2001, p57; Li Lite compiles, and " soybean processing and utilization ", Chemical Industry Press, in January, 2003, p139).This extracting method has the following advantages: (1) product color is whiter; (2) recovery rate is higher: (3) taking away after residual oil and the smell substance dissolving, cause product special flavour the best owing to pure; (4) it is few to adopt ethanol to reclaim process water, in addition without soda acid, therefore pollutes few; (5) cost is lower.But the process greatest problem of traditional alcohol processed soybean protein concentrate is a soybean protein, and water-soluble (NSI) is low greatly, generally has only about 5%.Because the soybean protein poorly water-soluble then shows to come out more soy proteinaceous functions such as gelling, elasticity, influences the use of egg white matter.

Summary of the invention

The objective of the invention is to overcome the shortcoming of traditional alcohol processed soybean protein concentrate process, propose a kind of method of modifying that makes the FSPC of the water-soluble 70-80% of the reaching level of soybean protein.

Method main technical schemes of the present invention: be that defatted soybean meal is separated the insoluble protein that obtains, further by water dilution, adjustment pH value, heating, homogeneous, drying and other steps, to obtain the concentrated albumen-powder of soybeans that NSI reaches 70-80%.

Method of the present invention may further comprise the steps:

(1) but defatted soybean meal is crushed to the digester of putting into a temperature adjustment behind 100 orders, spray into the ethanolic solution that concentration expressed in percentage by volume is 60-65% from top, its amount is to wash at 1: 7 by the weight ratio of bean cake powder and ethanol, and make material temperature be controlled at 50 ± 5 ℃, lixiviate 1 hour, the slurry that obtains separates it with seperator;

(2) slurry of step (1) separation enters in the reextraction jar, is the ethanol of 80-90% again with concentration expressed in percentage by volume, handles 30 fens kinds under 70 ± 5 ℃ of conditions, and then separates, and reclaims ethanol from supernatant, and remaining ethanol is removed in the sediment heating;

(3) slough in step (2) and add sedimentary 3-7 times of water dilution in the sediment of residual ethanol, use NaHCO again ₃Or NaOH to adjust pH value be 7.0-8.0, be heated to 100-130 ℃, keep after 5-10 minute and be cooled to 75-90 ℃, then through the homogenizer homogeneous, homogenization pressure is 20-40Mpa, last drying, pulverizes the concentrated albumen-powder of soybeans that promptly makes modification.

The used equipment of the present invention all is known common equipment.

Advantage of the present invention and effect:

The present invention causes the FSPC NSI that makes to bring up to 70-80% (conventional method only is 5%) because insoluble protein is taked ways such as water dilution, heating, homogeneous, drying, and yield is 60-70%, and protein content is 67-70%; The product that the inventive method makes not only increases the trophism of albumen, and because of water miscible raising, also has processing characteristicies such as emulsibility, thickening property, gelling, elasticity, oil absorption, has enlarged the range of application of pure method albumen; Method cost of the present invention is low, pollute less, product special flavour is good.

The specific embodiment

Further specify characteristics of the present invention below by concrete example.

Example 1:

Get defatted soybean meal 5000g, be crushed to 100 order powder, bean cake powder is put into a controllable temperature digester with pulverizer, spray into 60 ° of alcoholic solution 35L from top, temperature is controlled at 52 ℃, behind the lixiviate 1h, is slurry, separate (recovered alcohol from supernatant) with seperator, sediment drops into second extractor, uses 80 ° of alcohol again, under 70 temperature conditions, behind the lixiviate 30min, separate (recovered alcohol in the supernatant) with seperator again; With sediment heating, add 5 times water dilution again after sloughing residual alcohol, drop in the pressurized tank, stir, use NaHCO ₃Transfer pH value to 7.8, be heated to 110 ℃, keep 10min, after reduce to 86 ℃,, use the homogenizer homogeneous, homogenization pressure 25Mpa.Protein solution behind the homogeneous is spray-dried, obtains the albumen powder of 3300g.The water-soluble of this albumen powder is 80% protein content 70%, and color and luster is pure white, free from extraneous odour.

Example 2:

Get defatted soybean meal 5000g, be crushed to 100 orders with pulverizer, above-mentioned bean powder is put into the digester of a controllable temperature, spray into 65 ° of alcohol 35L from top, temperature is controlled at 50 ℃, behind the lixiviate 1h, be slurry, separate (recovered alcohol from supernatant) with seperator, sediment drops into second extractor, with behind 90 ° of alcohol washing 30min, separate (recovered alcohol in the supernatant) again with seperator.The sediment heating adds 6 times water dilution after sloughing residual alcohol, drops in the pressurized tank, after stirring, transfer pH value to 7.3, be heated to 130 ℃, retention time 6min, be cooled to 76 ℃ afterwards, use the homogenizer homogeneous, homogenization pressure is 35Mpa, protein solution behind the homogeneous, in the income drying tray, dry in vacuum drying oven, baking temperature is 60 ℃, dry back dry plate is crushed to 180 orders through pulverizer, obtains the 3400g albumen powder.This albumen powder is water-soluble to reach 72%, protein content 68%, and color and luster is pure white, free from extraneous odour.

Claims (1)

1, a kind of method of modifying of FSPC, it is characterized in that: production process may further comprise the steps:

(1) but defatted soybean meal is crushed to the digester of putting into a temperature adjustment behind 100 orders, spray into the ethanolic solution that concentration expressed in percentage by volume is 60-65% from top, its amount is to wash at 1: 7 by the weight ratio of bean cake powder and ethanol, and make material temperature be controlled at 50 ± 5 ℃, lixiviate 1 hour, the slurry that obtains separates it with seperator;

(2) slurry of step (1) separation enters in the reextraction jar, is the ethanol of 80-90% again with concentration expressed in percentage by volume, handles 30 fens kinds under 70 ± 5 ℃ of conditions, and then separates, and reclaims ethanol from supernatant, and remaining ethanol is removed in the sediment heating;

(3) slough in step (2) and add sedimentary 3-7 times of water dilution in the sediment of residual ethanol, use NaHCO again ₃Or NaOH to adjust pH value be 7.0-8.0, be heated to 100-130 ℃, keep after 5-10 minute and be cooled to 75-90 ℃, then through the homogenizer homogeneous, homogenization pressure is 20-40Mpa, last drying, pulverizes the concentrated albumen-powder of soybeans that promptly makes modification.