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Method for preparing amylose

A technology of amylose and natural starch, which is applied in the field of amylose prepared by enzymatic reaction through screw reaction extrusion equipment, which can solve the problems of reaction time of more than 80 hours, restrictions on popularization and application, and low economic benefits , to achieve the effects of large-scale production and popularization and application, high purity, and reduced production costs

Inactive Publication Date: 2007-09-12
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs many steps such as dissolving, stirring, filtering, settling, centrifuging and washing, and the operation is complex and the reaction time is as long as more than 80 hours. The production efficiency is low and the economic benefit is low, which restricts its popularization and application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Composition of raw materials (weight, the same below):

[0032] 50 parts of pea starch

[0033] Concentration is 1% isoamylase solution 40 parts

[0034] Glycerin 6 parts

[0035] Steps:

[0036] The pea starch was refined to 3000 mesh with a ball mill micronizer, the temperature of the high-speed mixer was raised to 55°C, and the micronized pea starch, isoamylase solution and glycerin were added according to the above ratio, and the pH was adjusted to 5.5. Mix at low speed for 10 minutes first, then mix at high speed for 10 minutes after the material is evenly dispersed, discharge the material, and take out the material mixture.

[0037] After preheating the co-rotating intermeshing twin-screw extruder with aspect ratio ≥ 40 according to the following corresponding reaction temperature, inject the above mixture into the feeder, and react in the extruder through each temperature section in turn:

[0038] 40 55 65 70 75 80 90 100 80 65(℃)

[0039] The first temperat...

Embodiment 2

[0042] Raw material composition:

[0043] 65 parts cornstarch

[0044] 55 parts of 4% pullulanase solution

[0045] Caprolactam 9 parts

[0046] Steps:

[0047] The corn starch is refined to 5000 mesh with a ball mill micronizer, and the high-speed mixer is heated up to 60°C, and then the micronized corn starch, caprolactam and 60% pullulanase solution are added according to the above ratio, and the pH is adjusted to 4.5, and mixed at a low speed After 8 minutes, after the material is evenly dispersed, mix at high speed for 12 minutes, discharge the material, and take out the mixture.

[0048] After preheating the single-screw reaction extruder with aspect ratio ≥ 40 according to the reaction temperature set below, inject the above mixture into the feeder, and add the remaining amount of pullulanase solution, adjust the pH to 4.5, and then The reaction is carried out through the temperature sections of each zone in the extruder:

[0049] 50 60 65 70 75 85 95 105 80 70(℃) ...

Embodiment 3

[0053] Raw material composition:

[0054] 40 servings of plantain taro starch

[0055] Concentration is 35 parts of the mixed solution of pullulanase and isoamylase (1:1) of 3%

[0056] 3 parts glycerin

[0057] Steps:

[0058] The canna starch is refined to 10000 by a ball mill micronizer, the temperature of the high-speed mixer is raised to 60°C, and then the micronized canna starch, mixed enzyme solution and glycerin are added according to the above ratio, and the pH is adjusted to 4.0. Mix at low speed for 5 minutes until the material is evenly dispersed, then mix at high speed for 9 minutes, and discharge the material mixture.

[0059] After preheating the three-screw reaction extruder with aspect ratio ≥ 40 according to the reaction temperature set below, inject the above mixture into the feeder, adjust the pH to 4.5, and carry out the reaction in the extruder through the temperature sections of each zone in turn :

[0060] 40 50 65 70 75 80 95 105 75 65(℃)

[0061...

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Abstract

An amylose preparation method is to mix the natural starch which particle size is 1-9 mu m, starch debranching enzyme solution which weight content is from 1% to 10%, and plasticizer component together, then continuously react and extrude from the screw-type reactive equipment under pH of 4.0-6.5 and temperature of 40deg.C-105deg.C. The ratio of different materials is 40-70 weight share of natural starch, 30-60 weight share of enzyme solution, 2-10 weight share of plasticizer component. Among them, the plasticizer component includes at least one of polyalcohol mixture containing alcohols glycerin, glycol, butanediol, sorbitol, xylitol, or any one of acid amides containing formamide, caprolactam, or any one of carbamide and stearin.

Description

technical field [0001] The invention relates to a method for preparing amylose, in particular to a method for preparing amylose by enzymatic reaction through screw reaction extrusion equipment. Background technique [0002] Starch is a natural polymer compound, and it can be widely used as an industrial raw material in many fields after denaturation and hydrolysis. [0003] Natural starch contains amylose and amylopectin in different proportions. Amylose molecules are polysaccharide chains linked by α-1,4-glucosidic bonds, while amylopectin molecules contain sugar chains with α-1,4-glycosidic bonds and α-1,6 - Bonded glycosidic bond linked branched structure. [0004] The amylose content in natural starch is low, such as the amylose content in common corn starch is about 25%, even the amylose content in corn starch with high amylose content does not exceed 70%. The different contents of straight chain and branched chain components in starch can make the properties of star...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B33/00B29C47/38B29C47/92B29C48/395B29C48/92
CPCB29C47/92
Inventor 陈庆崔彪李宇华杨欣宇
Owner CHENDU NEW KELI CHEM SCI CO LTD
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