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
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[0030] Example 1:
[0031] (1) Adjust the pH value of 1000g corn starch milk with a weight concentration of 30% to 10.5 with 1mol / L sodium hydroxide solution at 40℃, and then add STMP / STPP which accounts for 0.2% of the starch dry basis weight for 240min ; The weight ratio of STMP to STPP is 99:1.
[0032] (2) Dry the starch sample in a 40°C blast drying oven to a moisture content of 30% by weight;
[0033] (3) Put the starch sample obtained in step (2) into a humid heat reactor (high temperature resistant KH-200 produced by Xi’an Taikang Biotechnology Co., Ltd., which can withstand a working pressure of 3Mpa and a temperature of 230℃) at 130℃ Damp heat reaction 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 1 mol / L hydrochloric acid; the weight ratio of water to starch dry basis is 3:1.
[0035] (5) Wash the sample with water 3~5 times, and dry it at 40°C to a moisture content of 12% by wei...
Example Embodiment
[0039] Example 2:
[0040] (1) Pea starch milk with a concentration of 35%, adjust the pH to 11.0 at 25°C, and then add STMP / STPP accounting for 12% of the starch dry basis weight for 120 minutes; the weight ratio of STMP to STPP is 97:1.
[0041] (2) Bake the sample to a moisture content of 20% by weight at 50°C;
[0042] (3) Put the starch sample obtained in step (2) into a humid heat reactor (high temperature resistant KH-200 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 dry basis is 5:1.
[0044] (5) Wash the sample and dry it at 50°C to a moisture content of 11% by weight;
[0045] (6) The product is obtained by crushing and sieving through 70 mesh.
[0046] After testing, the product obtained in step (6) is a white...
Example Embodiment
[0047] Example 3:
[0048] (1) Mung bean starch milk with a concentration of 40%, adjust the pH to 11.5 at 50°C, and then add STMP / STPP accounting for 4% of the starch dry basis weight for 60 minutes; the weight ratio of STMP to STPP is 98:1.
[0049] (2) Bake the sample at 45°C to a moisture content of 15% by weight;
[0050] (3) Put the starch sample obtained in step (2) into a humid heat reactor (high temperature resistant KH-200 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 to a moisture content of 10% by weight;
[0053] (6) The product is obtained by crushing and sieving through 80 mesh.
[0054] After testing, the product obtained in step (6) is a white powder...
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