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A kind of preparation method of resistant dextrin

A technology of resistant dextrin and pyrodextrin, which is applied in the field of starch deep processing, can solve the problems of uneven acid-heat reaction of starch, long reaction time and high production cost, and achieves easy construction and maintenance, reduced reaction time and high production efficiency. Effect

Active Publication Date: 2018-08-07
NANTONG CHANGHAI FOOD ADDITIVE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the process of preparing resistant dextrin by acid-heat method mainly has problems such as high energy consumption, long reaction time, low thermal efficiency, uneven acid-heat reaction of starch, and easy carbonization, which lead to complicated process and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 1 kg of cornstarch, spray 500mL of aqueous solution containing 1.5g of hydrochloric acid evenly into the starch, stir evenly, pre-dry at 80°C until the moisture content is less than 5%, and pulverize it with a flour mill until it can pass through a 40-mesh sieve.

[0032] A straight-pipe airflow drying device is selected, the top of the straight-pipe airflow drying device is provided with a cyclone separator, and the bottom of the cyclone separator is provided with a solid flow distributor.

[0033] Input hot air to the bottom of the straight-pipe airflow drying device through a hot air stove, heat up to 220°C, and the air velocity rises to 20m / s, and keep it relatively stable, then dry the pre-dried and powdered cornstarch from the straight-pipe airflow The material is fed from the bottom of the device, and the high-temperature air blows the raw materials, and the raw materials are suspended in the high-temperature air, and the acid-heat reaction is carried out du...

Embodiment 2

[0041] Weigh 1 kg of cornstarch, spray 500mL of aqueous solution containing 2g of nitric acid evenly into the starch, stir evenly, pre-dry at 100°C until the moisture content is less than 5%, and pulverize it with a flour mill until it can pass through a 60-mesh sieve.

[0042] Straight tube type airflow drying device is the same as embodiment 1.

[0043] Input hot air to the bottom of the straight-pipe airflow drying device through a hot air stove, heat up to 200°C, and the air velocity rises to 15m / s, and keep it relatively stable, then dry the pre-dried and powdered cornstarch from the straight-pipe airflow The bottom of the device is continuously fed, and the high-temperature air blows the raw materials, and the raw materials are suspended in the high-temperature air, and the acid-heat reaction is carried out during the high-temperature air transportation process for 20 minutes. During the reaction, the heating gas is discharged through the cyclone separator, and the raw ma...

Embodiment 3

[0047] Weigh 1 kg of potato starch, evenly spray 500 mL of aqueous solution containing 0.5 g of sulfuric acid into the starch, stir evenly, pre-dry at 110 °C until the moisture content is less than 5%, and grind it with a powder machine until it can pass through a 20-mesh sieve.

[0048] Straight tube type airflow drying device is the same as embodiment 1.

[0049] Input hot air to the bottom of the straight tube airflow drying device through a hot air stove, heat up to 180°C, and the air velocity rises to 40m / s, and after keeping it relatively stable, the pre-dried and powdered potato starch is dried from the straight tube airflow The bottom of the device is continuously fed, and the high-temperature air blows the raw materials. The raw materials are suspended in the high-temperature air, and the acid-heat reaction is carried out during the high-temperature air transportation process for 15 minutes. During the reaction, the heating gas is discharged through the cyclone separat...

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PUM

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Abstract

The invention discloses a preparation method of resistant dextrin. The preparation method is characterized by comprising steps as follows: a straight pipe type air flow drying device is adopted for preparation, a cyclone separator is arranged at the top of the straight pipe type air flow drying device, a solid flow distributor is arranged at the bottom of the cyclone separator, acidized starch is taken as a raw material, hot air and the raw material are fed from the bottom of the straight pipe type air flow drying device, the raw material is blown by high-temperature air flow, suspended in the high-temperature air flow and subjected to an acid heat reaction in the conveying process by the high-temperature air flow, the raw material after cyclone separation is re-guided to the straight pipe type air flow drying device by the solid flow distributor to be subjected to a circular reaction in the reaction process, a crude pyrodextrin product is discharged regularly and then refined, and a resistant dextrin product is obtained. The method is continuously and stably operated, the heat efficiency is high, the starch can be contacted with the high-temperature air flow to the greatest extent, carbonization is not easily caused due to uniform heating, the reaction time is short, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of starch deep processing, and in particular relates to a preparation method of resistant dextrin derived from starch. Background technique [0002] Resistant dextrin is a new type of low molecular weight water-soluble dietary fiber obtained from starch as raw material through partial degradation and glycosyl transfer reaction. Its molecule contains α-1,2 and α-1,3 glycosidic bonds, and there are glucan and β-1,6 glucoside structures formed by intramolecular dehydration at part of the reducing end, so it can not be digested by the human body Absorbed directly into the large intestine to play the physiological role of dietary fiber. Dietary fiber is known as the seventh largest nutrient necessary for human health, and it can be used not only as a food additive, but also as a health food. [0003] Resistant dextrin has excellent physical properties and unique physiological functions. Resistant dextrin has low sweetne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B30/18
CPCC08B30/18
Inventor 徐勇梁丽敏程蕃根马梦垚
Owner NANTONG CHANGHAI FOOD ADDITIVE