Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing complex starch

A composite, starch technology, applied in the field of starch modification, can solve the problems of increasing the difficulty of wastewater treatment, increasing, reducing filler retention, etc., to achieve the effect of improving the running performance of the paper machine, improving the degree of cationization, and reducing the loss rate

Active Publication Date: 2015-08-26
GOLD EAST PAPER JIANGSU
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application effect of cationic starch on the wet end has a lot to do with its dosage. When it is used to improve the strength, its dosage is generally relatively high; but when the dosage of cationic starch is too high, it will not only have a negative impact on pulp dehydration, but also disturb the wetness. The charge balance system of the terminal system can reduce the retention of fillers, which will cause the phenomenon of paper machine sticking to the roll, etc., which will have a negative impact on the normal operation of the paper machine, and when the amount of cationic starch added is too high, its loss rate will also increase, resulting in waste water The increase in the value of Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD), and the difficulty of wastewater treatment, etc.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing complex starch
  • Method for preparing complex starch
  • Method for preparing complex starch

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] refer to figure 1 , the embodiment of the present invention provides a kind of preparation method of composite starch, comprising:

[0047] Step S101: providing raw starch, solvent, etherification agent, catalyst and protective agent;

[0048] In the embodiment of the present invention, cationic modification is carried out on native starch. The etherification agent is an amine compound, which is used to react with native starch to make the native starch molecules have cationic groups. The catalyst is generally an alkaline substance, and the protective agent It is used to prevent gelatinization of starch starch during the reaction process. The solvent is used to provide a reaction environment for wet preparation of cationic starch, and the solvent can be water or an organic solvent.

[0049] Step S201: Using wet method to prepare cationic starch, mixing raw starch, solvent, etherifying agent, catalyst and protective agent into a reaction system for reaction, and at the...

Embodiment approach 1

[0102] The raw tapioca starch of 1 mass part, 100 mass parts of raw tapioca and water are mixed and slurried, so that the quality of tapioca raw starch accounts for 30% of the gross mass of tapioca raw starch and water, obtain the first mixture, then the second A mixture and 2 mass parts of diethylamine ethyl chloride, 2 mass parts of sodium hydroxide and 0.5 mass parts of sodium chloride are added to the reactor for reaction, and the reaction temperature in the control reactor is 30 degrees Celsius, and the reaction 2 Hours later, oxalic acid is added to neutralize the alkali, and the pH value of the reaction system in the reactor is adjusted to 7. After completion, the composite starch is obtained through wet sieving, washing, dehydration and drying.

Embodiment approach 2

[0104] 15 parts by mass of precipitated calcium carbonate and water are pre-mixed to obtain a second mixture, and then the second mixture is mixed with 100 parts by mass of corn starch, so that the quality of corn starch accounts for the total mass of corn starch and water 40% of the first mixture, and then the first mixture with 7 parts by mass of 3-chloro-2-hydroxypropyltrimethylammonium chloride, 16 parts by mass of sodium hydroxide and 1 part by mass of sodium chloride Put it into the reactor to react, control the reaction temperature in the reactor to be 45 degrees Celsius, after reacting for 6 hours, add citric acid to neutralize the alkali, adjust the pH value of the reaction system in the reactor to 7.5, pass through wet sieve, wash after completion , Dehydration and drying to obtain composite starch.

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing complex starch, which comprises native starch, solvent, etherifying agent, catalyst and protective agent, and uses a wet-chemical preparation cationic starch process to mix the native starch, the solvent, the etherifying agent, the catalyst and the protective agent to be a reaction system to react, simultaneously, inorganic particles exist in the reaction system before the native starch is converted into cationic starch which meets reserve requirements, and the native starch continues to be converted into the cationic starch in the reaction system which has the inorganic particles until the cationic starch which meets the reserve requirements is generated through conversion to obtain the complex starch. The method for preparing the complex starch can improve running performance of a paper machine, and reduces loss rate of the complex starch.

Description

technical field [0001] The invention relates to the technical field of starch modification, in particular to a preparation method of composite starch. Background technique [0002] Cationic starch is a nitrogen-containing derivative formed by the reaction of the hydroxyl group of glucose molecules on starch and amine compounds under the catalysis of a catalyst. Because it contains positively charged groups, it is generally used in the wet end of papermaking. [0003] The application effect of cationic starch on the wet end has a lot to do with its dosage. When it is used to increase the strength, its dosage is generally relatively high; but when the dosage of cationic starch is too high, it will not only have a negative impact on pulp dehydration, but also disturb the wetness of the pulp. The charge balance system of the terminal system can reduce the retention of fillers, which will lead to the phenomenon of paper machine sticking rolls, etc., which will have a negative imp...

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 Applications(China)
IPC IPC(8): C08L3/08C08K3/22C08K3/26C08K3/34C08B31/08
Inventor 周仁娟韦丹李俊芦海
Owner GOLD EAST PAPER JIANGSU