Non-crystal granular starch and its preparing process

A technology of amorphous granules and starch, applied in the field of chemistry, can solve the problems of particle structure damage, difficult product, poor permeability, etc., achieve the effect of easy drying and purification, and overcome the uneven structure

Inactive Publication Date: 2002-05-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although starch and modified starch products in these two states have been widely used, they still have relatively large deficiencies and defects in structure and properties.
The starch in the polycrystalline granular state has both crystallinity and granularity. The advantage of this structure and composition is that the product maintains the original granular structure of the starch, so it is easy to separate, purify, dehydrate, dry and pulverize it. , can produce high-purity products to meet the needs of food, pharmaceutical and other industries; the disadvantage of polycrystalline granular starch is that it contains a large number of crystalline structures, the existence of these crystalline structures makes starch granule structure uneven, poor permeability, low adsorption , low chemical reactivity and biological reactivity, and poor processability, which directly affect product performance, manufacturing cost and application fields
[0004] Starch products in an amorphous gelatinized state have both amorphous and gelatinized properties. The advantage is that they only contain amorphous structures and do not contain crystalline structures, so they have uniform structures, good permeability, high chemical and biological reactivity, and can be processed. Good biodegradation and digestion and absorption; its disadvantage is that the original granular structure of starch has been destroyed, which makes it difficult or even impossible to separate, purify and dry the product, and cannot produce high-purity products, which directly affects the starch. The development of product manufacturing technology, the increase of product varieties and the expansion of application fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In a super constant temperature water bath reaction pool or other constant temperature reactor with a constant temperature of 30°C, keep stirring continuously, adjust the cornstarch to a uniform starch milk with a concentration of 20% with water, and dissolve 2% of the absolute dry starch weight in the bottom water before milk adjustment Anhydrous sodium sulfate, use 3% sodium hydroxide solution to adjust the pH value of starch milk to 11.50, keep the temperature of starch milk at 30°C and continue stirring, slowly add 1% phosphorus oxychloride, and simultaneously add a concentration of 3 % sodium hydroxide solution to keep the pH of the system constant. After reacting for 1 hour, use sulfuric acid or hydrochloric acid to neutralize to a pH value of 6.3, heat the system to 100°C, keep warm for 50 minutes for amorphization treatment, filter and wash with 50°C water, crush the filter cake, and dry it at 55°C Dry in an oven or by air flow until the starch equilibrium moist...

Embodiment 2

[0022] In a super constant temperature water bath reaction pool or other constant temperature reactor with a constant temperature of 60°C, keep stirring continuously, adjust the cornstarch to a uniform starch milk with a concentration of 50% with water, and dissolve 1% of the absolute dry starch weight in the bottom water before milk adjustment Anhydrous sodium sulfate, use 1% sodium hydroxide solution to adjust the pH value of starch milk to 9, keep the temperature of starch milk at 50°C and continue to stir, slowly add 0.05% phosphorus oxychloride, and simultaneously add a concentration of 1 % sodium hydroxide solution to keep the pH of the system constant. After reacting for 0.1 hour, use 1% sodium hydroxide to increase the pH value to 14 for amorphization treatment. After 1 minute, neutralize with sulfuric acid or hydrochloric acid to a pH value of 6.5, filter and wash with 20°C water, crush the filter cake, Dry in an oven at 55°C or through airflow to below the equilibriu...

Embodiment 3

[0024] In a super constant temperature water bath reaction tank or other constant temperature reactor with a constant temperature of 5°C, keep stirring continuously, first dissolve 0.1% sodium trimetaphosphate in water, then add tapioca starch and adjust it to a uniform starch milk with a concentration of 20%, and then Dissolve 15% anhydrous sodium carbonate to absolute dry starch weight, adjust the pH value of starch milk with 5% sodium hydroxide solution to be 12, keep the starch milk temperature at 30°C) and continue stirring, while adding a concentration of 1% Sodium hydroxide solution to keep the pH of the system constant. After reacting for 24 hours, use sulfuric acid or hydrochloric acid to neutralize to a pH value of 6.5, heat the system to 70°C, keep warm for 50 minutes for amorphization treatment, filter and wash with water at about 20°C, crush the filter cake, and heat it at 55°C Dry in an oven or air-dry to below the starch equilibrium moisture. Cross 100 mesh sie...

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Abstract

A non-crystal granular starch is prepared from raw starch through cross-linking modification and non-crystallizing treatment. Its advantages are easy consequential processing such as separation, purification, dewatering, etc, high purity, uniformity, permeability and chemical and biological activity, easy degradation, good digestion, and wide application range.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a method for preparing starch products with both amorphous and granular properties. This technology can be used in raw starch and modified starch production enterprises, and the resulting amorphous granular starch and amorphous granular modified starch products can be used in food, papermaking, textiles, building materials, chemicals, pharmaceuticals, petroleum, environmental protection, A wide range of industries and fields such as agriculture, forestry and mining. Background technique [0002] Starch is a granular natural polymer synthesized by plants through photosynthesis. Its basic components are carbohydrates. Starch products mainly refer to starch and modified starch. At present, although there are many kinds of starch products, they can be divided into two categories in terms of physical properties, one is polycrystalline granular products with both crystallinity and granularity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/00C08K3/32
Inventor 张本山高大维于淑娟曾新安
Owner SOUTH CHINA UNIV OF TECH
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