Preparation method of papermaking retention agent

A retention aid and the technology of preparation steps are applied in the field of preparation of retention aid in papermaking, which can solve the problems of poor retention effect, damaged paper strength, poor adhesion of fine fibers, etc. Improve the effect of retention aid

Inactive Publication Date: 2019-05-17
常州麒通国际贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a preparation method of paper retention aids in view of the defects that current paper retention aids have low adhesion to fine fibers and poor retention effect leading to damage to paper strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Preparation of mixed slurry:

[0032]Put corn leaves and bagasse into a beaker at a mass ratio of 1:3, impregnate with 10% hydrochloric acid for 2 hours, put them into a high-temperature reactor after impregnation, fill the reactor with argon, and raise the pressure in the reactor to 1.2MPa, seal the reaction kettle, raise the temperature inside the kettle to 200°C, and react at constant temperature and pressure for 80 minutes to prepare the reaction solution;

[0033] Add ferric chloride powder with 5% of the mass of the reaction solution into the above reaction kettle, use a stirring device to mix and stir at a speed of 300r / min for 30min at a temperature of 200°C to prepare a mixed solution, and then add the mixed solution to the reaction kettle The starch with a mass of 13% was continuously mixed and stirred at a speed of 300r / min for 40min to prepare a mixed slurry.

[0034] Preparation of milled product:

[0035] In parts by weight, 10 parts of the above-mention...

example 2

[0041] Preparation of mixed slurry:

[0042] Put corn leaves and bagasse into a beaker at a mass ratio of 1:3, impregnate with 13% hydrochloric acid for 2.5 hours, put them into a high-temperature reactor after impregnation, fill the reactor with argon, and increase the pressure in the reactor To 1.4MPa, seal the reaction kettle, raise the temperature inside the kettle to 220°C, and react at constant temperature and pressure for 90 minutes to prepare the reaction liquid;

[0043] Add ferric chloride powder with a mass of 7% of the reaction solution into the above reaction kettle, use a stirring device to mix and stir at a speed of 350r / min for 35min at a temperature of 220°C to prepare a mixed solution, and then add the mixed solution to the reaction kettle The starch with a mass of 14% was continuously mixed and stirred at a speed of 350r / min for 45min to prepare a mixed slurry.

[0044] Preparation of milled product:

[0045] In parts by weight, 11 parts of the above-menti...

example 3

[0051] Preparation of mixed slurry:

[0052] Put corn leaves and bagasse into a beaker at a mass ratio of 1:3, impregnate with hydrochloric acid with a mass fraction of 16% for 3 hours, put them into a high-temperature reactor after impregnation, fill the reactor with argon, and raise the pressure in the reactor to 1.6MPa, seal the reaction kettle, raise the temperature inside the kettle to 240°C, and react at constant temperature and pressure for 100 minutes to prepare the reaction solution;

[0053] Add ferric chloride powder with a mass of 9% of the reaction solution into the above reaction kettle, use a stirring device to mix and stir at a speed of 400r / min for 40min at a temperature of 240°C to prepare a mixed solution, and then add the mixed solution to the reaction kettle The starch with a mass of 15% was continuously mixed and stirred at a speed of 400r / min for 50min to prepare a mixed slurry.

[0054] Preparation of milled product:

[0055] In parts by weight, 12 pa...

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PUM

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Abstract

The invention relates to a preparation method of a papermaking retention agent, and belongs to the technical field of papermaking assistants. According to the preparation method, cellulose, hemicellulose, lignin and other components are extracted from maize leaves and bagasse, the fiber surfaces are partially hydrolyzed to form complexing adsorption and ionic bond adsorption with iron ions which are added later and form adsorption effects of covalent bonds, intermolecular force and other chemical bonding force with starch, thus bonding degree between all molecules of the retention agent is increased, and the retention effect is improved; and according to the preparation method, the starch is introduced into the retention agent and subjected to oxidation modification and carboxyl modification, thus oxhydryl groups on the surface of the starch are substituted by carboxyl groups, starch molecules are easily combined with fine fibers in wood pulp through a reaction between carboxyl and oxhydryl to generate covalent bonds, firm absorption combination is achieved, thus the retention effect of the retention agent is enhanced, adsorption to the plant fibers and bonding to the external finefibers and the wood pulp are promoted, the retention effect of the retention agent is enhanced, and thus the papermaking retention agent has wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of a papermaking retention aid and belongs to the technical field of papermaking additives. Background technique [0002] During the papermaking process, there will be a lot of fine fibers in the pulp, the retention rate of the fine fibers is low, and they will be wasted through white water, and the fine limit will accumulate at the bottom of the filter screen, which will affect the water filtration function of the paper industry and affect the paper. Therefore, in the process of papermaking, retention aids will be added to the wire part to increase the retention rate of fine fibers and improve the dehydration performance of the paper industry. Retention aids generally include inorganic substances such as aluminum sulfate, sodium aluminate, etc. (the retention effect is not significant); cationic starch; carboxymethyl cellulose; synthetic resins (such as polyethyleneimine, polyacrylamide, polyethylene oxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/14D21H17/66D21H17/06D21H17/02D21H17/28D21H17/37D21H17/25D21H17/24D21H21/10
Inventor 陈莉莉
Owner 常州麒通国际贸易有限公司
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