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Method for preparing resistant starch by simultaneously adopting crosslinking and heat moisture treatment

A technology of resistant starch and wet heat treatment, applied in the field of resistant starch, can solve the problems of unfavorable automatic production, low resistant starch content, complicated process, etc., and achieves easy automatic control, high resistant starch content and high yield. Effect

Inactive Publication Date: 2011-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of these two methods are: the content of the prepared resistant starch is low, the use of acid, alkali, etc. causes environmental pollution, and the cumbersome process is not conducive to automated production, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Adjust the pH value of 1000g cornstarch milk with a weight concentration of 30% to 10.5 with 1mol / L sodium hydroxide solution at 40°C, and then add STMP / STPP accounting for 0.2% of the dry weight of starch for 240min ; The weight ratio of STMP to STPP is 99:1.

[0032] (2) Dry the starch sample in a blast drying oven at 40°C to a moisture content of 30% by weight;

[0033] (3) Put the starch sample obtained in step (2) into a damp heat reactor (high temperature resistant KH-200 type produced by Xi'an Taikang Biotechnology Co., Ltd., which can withstand a working pressure of 3Mpa and a temperature of 230°C) at 130°C Damp heat reaction for 24h;

[0034] (4) After the sample obtained in step (3) is cooled at room temperature, add water to disperse it and adjust the pH to 6.0 with 1mol / L hydrochloric acid; the weight ratio of water to starch on a dry basis is 3:1.

[0035] (5) Wash the sample with water for 3 to 5 times, and dry at 40°C until the moisture content is 1...

Embodiment 2

[0040](1) Pea starch milk with a concentration of 35%, adjust the pH value to 11.0 at 25°C, and then add STMP / STPP accounting for 12% of the dry weight of the starch for 120 minutes; the weight ratio of STMP to STPP is 97:1.

[0041] (2) Dry the sample at 50°C until the moisture content is 20% by weight;

[0042] (3) Put the starch sample obtained in step (2) into a damp heat reactor (high temperature resistant KH-200 type produced by Xi'an Taikang Biotechnology Co., Ltd., which can withstand a working pressure of 3Mpa and a temperature of 230°C) at 120°C Reaction 48h;

[0043] (4) After the sample obtained in step (3) is cooled at room temperature, add water to disperse it and adjust the pH to 7.0; the weight ratio of water to starch on a dry basis is 5:1.

[0044] (5) Wash the sample and dry it at 50°C until the water content is 11% by weight;

[0045] (6) The product is obtained by crushing and passing through a 70-mesh sieve.

[0046] After testing, the product obtained...

Embodiment 3

[0048] (1) Mung bean starch milk with a concentration of 40% was adjusted to a pH value of 11.5 at 50°C, and then STMP / STPP, which accounted for 4% of the dry weight of the starch, was added for 60 minutes; the weight ratio of STMP to STPP was 98:1.

[0049] (2) Dry the sample at 45°C until the moisture content is 15%;

[0050] (3) Put the starch sample obtained in step (2) into a damp heat reactor (high temperature resistant KH-200 type produced by Xi'an Taikang Biotechnology Co., Ltd., which can withstand a working pressure of 3Mpa and a temperature of 230°C) at 140°C Reaction 1h;

[0051] (4) After the sample obtained in step (3) is naturally cooled, add water to disperse it and adjust the pH to 6.5; the weight ratio of water to starch dry basis is 4:1.

[0052] (5) Wash the sample and dry it at 45°C until the water content is 10% by weight;

[0053] (6) The product is obtained by crushing and passing through an 80-mesh sieve.

[0054] After testing, the product obtained...

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Abstract

The invention discloses a method for preparing resistant starch by simultaneously adopting crosslinking and heat moisture treatment, which comprises the following steps of: regulating the pH value of 30 to 45 weight percent starch milk at the temperature of between 25 and 50DEG C to be 10.5-12.5, adding sodium trimetaphosphate / sodium tripolyphosphate in an amount which is 0.2 to 12 percent based on the weight of the dry basis of starch, keeping for 30 to 240 minutes, drying until the weight percent of water is 15-45 percent, and performing heat moisture reaction at the temperature of between 100 and 140DEG C for 1 to 72 hours in a heat moisture reactor; and washing, drying, crushing and sieving to obtain a product. In the method, starch is taken as a raw material, the content of resistant starch is greatly improved by a physiochemical means, a process of preparing the resistant starch is simplified, the efficiency is effectively improved, waste liquor and pollution are avoided in the production process, and the energy consumption is reduced. The prepared resistant starch can serve as a functional food material and biochemical medicine carrier.

Description

technical field [0001] The invention relates to the production of resistant starch in food and food additives, in particular to a method for preparing high-content resistant starch by simultaneously adopting cross-linking and moist heat. The method uses low-value and renewable starch as a raw material to produce low-calorie, high-dietary-fiber functional food additive resistant starch. Background technique [0002] Resistant starch refers to the part of starch and starch degradation products that cannot be digested and absorbed by the human body when they pass through the small intestine of the human body. For a long time, it was believed that starch was completely hydrolyzed and absorbed in the human small intestine. Until 1982, Englyst et al. found in their research that a part of starch could not be hydrolyzed by amylases such as α-amylase and pullulanase, so this part of starch was It's called resistant starch. In 1993, the European Flair Concerted Action on Resistant ...

Claims

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Application Information

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IPC IPC(8): C08B31/00A23L1/09
Inventor 高群玉武俊超
Owner SOUTH CHINA UNIV OF TECH
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