Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of production method of modified cassava starch

A technology of starch and carboxymethyl cassava, which is applied in the production field of starch modification and modified cassava starch, which can solve the problems of incomplete alkalization process, increased side reactions, and uneven distribution, so as to improve the technical level and economic benefits , reduce the crystallization index, and enhance the effect of nucleophilic ability

Active Publication Date: 2018-07-27
GUANGXI JINHAN ENVIRONMENTAL PROTECTION CO LTD
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One is that the obtained product has large and uneven particles, and its performance indicators such as degree of substitution and viscosity are not high and unstable, and the alkalization process is not thorough and perfect, which seriously affects the use effect of the product
[0005] The second is that the traditional process puts the alkali into the solvent at one time. As a result, the dissolution rate is very slow and the distribution is uneven, which seriously affects the alkalization effect of starch, and then affects the etherification effect, and finally cannot obtain high substitution degree. products, and the salt resistance and acid resistance of the product do not meet the requirements of application performance indicators
[0006] The third is that the traditional method for preparing starch carboxymethyl starch sodium is very prone to local reactions, resulting in incomplete etherification, low conversion rate, and increased side reactions, resulting in uneven substitution degrees of products, low substitution degrees, and low production efficiency.
No corresponding downstream production line has been developed. There are few reports on the process of synthesizing carboxymethyl starch from cassava starch.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of production method of modified cassava starch, comprises the following steps:

[0039] (1) Alkalization treatment: Add 100 parts by weight of tapioca starch, 60 parts by weight of sodium hydroxide and aqueous ethanol solution with a volume concentration of 90% into the mixer at the same time, stir evenly at a speed of 600r / min, and heat to 25 After keeping for 40 minutes at ℃, cool down to room temperature naturally, add to the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;

[0040] (2) Etherification reaction: Add 40 parts by weight of chloroacetic acid to the high-pressure homogenizer, heat to 50°C, and keep for 110-130min for etherification reaction. Aft...

Embodiment 2

[0045] A kind of production method of modified cassava starch, comprises the following steps:

[0046] (1) Alkalization treatment: Add 120 parts by weight of tapioca starch, 70 parts by weight of sodium hydroxide and aqueous ethanol solution with a volume concentration of 92% into the mixer at the same time, stir evenly at a speed of 650r / min, and heat to 26 ℃, after keeping for 45min, cool down to room temperature naturally, add to the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;

[0047] (2) Etherification reaction: Add 42 parts by weight of chloroacetic acid into the high-pressure homogenizer, heat to 52 °C, and keep for 115 minutes for etherification reaction. After ...

Embodiment 3

[0052] A kind of production method of modified cassava starch, comprises the following steps:

[0053] (1) Alkalization treatment: Add 140 parts by weight of tapioca starch, 80 parts by weight of sodium hydroxide and an aqueous ethanol solution with a volume concentration of 93% into the mixer, stir evenly at a speed of 700r / min, and heat to 27 ℃, keep it for 50 minutes, cool it down to room temperature naturally, add it into the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;

[0054] (2) Etherification reaction: Add 45 parts by weight of chloroacetic acid into the high-pressure homogenizer, heat to 55 °C, and keep for 120 minutes for etherification reaction. After the eth...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing high-viscosity and high-degree-of-substitution carboxymethyl cassava starch by utilizing an ultrahigh-pressure blasting technique. The method comprises the steps such as alkaline treatment, etherification reaction and purification. The method is carried out by primarily achieving the purpose of destroying a crystallization region of cassava starch particles by utilizing sodium hydroxide, sufficiently swelling and alkalifying starch molecules and loosening starch particles under the ultrahigh pressure of a high-pressure homogenizer, so that the hydroxyl of the starch becomes negative oxygen ions and the nucleophilic ability is strengthened, and simultaneously generating an St-O-Na<+> active center, then, preparing the high-viscosity and high-degree-of-substitution carboxymethyl cassava starch through the bimolecular nucleophilic substitution between sodium carboxymethyl starch obtained by alkalifying the starch and chloroacetic acid under the alkaline condition of sodium hydroxide. By utilizing the high-degree destructive effect of the ultrahigh-pressure blasting technique on a crystallization structure of the cassava starch, the technical problems such as degradation of the starch particles in a production process of the high-viscosity and high-degree-of-substitution carboxymethyl cassava starch are solved.

Description

technical field [0001] The invention belongs to the field of biochemical industry and relates to starch modification technology, in particular to a production method utilizing modified cassava starch. Background technique [0002] Carboxymethyl starch sodium (CMS for short) is a representative product of modified starch. After carboxymethylation of starch, the carboxymethyl starch ether structure is formed on the hydroxyl group of glucose due to the introduction of carboxymethyl groups. It is a water-soluble anionic macromolecular compound, and its physical and chemical properties are similar to those of carboxymethyl cellulose ( CMC) is similar, also known as modified sodium carboxymethyl starch or sodium starch acetate. CMS is generally non-toxic and odorless white or light yellow powder, odorless, tasteless, non-toxic, heat and easy to absorb moisture. Soluble in water to form a colloidal solution, stable to light and heat. Insoluble in ethanol, ether, chloroform and o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08B31/12
CPCC08B31/12
Inventor 曾军曾永斌
Owner GUANGXI JINHAN ENVIRONMENTAL PROTECTION CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products