Papermaking fiber dispersing agent and preparation method therefor

A technology of dispersant and fiber, which is applied in the field of preparation of fiber dispersant, can solve the problems that are not easy to meet at the same time, and achieve the effect of speeding up the dissolution rate, improving the dissolution dispersibility, wide and easy operation

Active Publication Date: 2016-03-02
JIANGMEN GAOLIYI TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of use, high molecular weight, dissolution rate and good solubility are contradictory, and it is not easy to meet the requirements at the same time.

Method used

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  • Papermaking fiber dispersing agent and preparation method therefor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a 500L polymerizer, add 100Kg (25%) of acrylamide, dilute with 113.1Kg of pure water, stir well and slowly add 138.9Kg of 40% sodium hydroxide solution dropwise, control the solution temperature to ≤40°C, When the pH value is 6.8, stop the dropwise addition, then add 48Kg (12%) of acrylamide to the above solution, stir to dissolve, then add 1Kg of ammonium bicarbonate to the above solution, stir evenly, and measure the pH value between 7.0 and 8.5 If it is less than this range, add sodium hydroxide solution to fine-tune, if it is greater than this range, add hydrochloric acid to fine-tune, cool the solution to 15°C, add 32g of complexing agent, then pass high-purity nitrogen to remove oxygen in the solution, and pass nitrogen for 20 After 10 minutes, add 20g of isopropanol, stir evenly, add 40g of ammonium persulfate, 40g of azobisisobutylamidine hydrochloride, add 40g of sodium bisulfite after an interval of 10 minutes, continue to feed nitrogen for 10 minutes, then ...

Embodiment 2

[0028] In a 500L polymerizer, add 100Kg (25%) of acrylamide, dilute with 113.1Kg of pure water, stir well and slowly add 138.9Kg of 40% sodium hydroxide solution dropwise, control the solution temperature to ≤40°C, When the pH value is 6.8, stop the dropwise addition, then add 48Kg (12%) of acrylamide to the above solution, stir to dissolve, then add 2Kg of ammonium bicarbonate to the above solution, stir evenly, and measure the pH value between 7.0 and 8.5 If it is less than this range, add sodium hydroxide solution to fine-tune, if it is greater than this range, add hydrochloric acid to fine-tune, cool the solution to 15°C, add 32g of complexing agent, then pass high-purity nitrogen to remove oxygen in the solution, and pass nitrogen for 20 After 10 minutes, add 20g of isopropanol, stir evenly, add 40g of ammonium persulfate, 40g of azobisisobutylamidine hydrochloride, add 40g of sodium bisulfite after an interval of 10 minutes, continue to feed nitrogen for 10 minutes, then ...

Embodiment 3

[0030] In a 500L polymerizer, add 120Kg (30%) of acrylamide, dilute with 65.3Kg of pure water, stir well and slowly add 166.7Kg of 40% sodium hydroxide solution dropwise, control the solution temperature ≤ 40°C, When the pH value is 6.8, stop the dropwise addition, then add 48Kg (12%) of acrylamide to the above solution, stir to dissolve, then add 1Kg of ammonium bicarbonate to the above solution, stir evenly, and measure the pH value between 7.0 and 8.5 If it is less than this range, add sodium hydroxide solution to fine-tune, if it is greater than this range, add hydrochloric acid to fine-tune, cool the solution to 15°C, add 32g of complexing agent, then pass high-purity nitrogen to remove oxygen in the solution, and pass nitrogen for 20 After 10 minutes, add 20g of isopropanol, stir evenly, add 40g of ammonium persulfate, 40g of azobisisobutylamidine hydrochloride, add 40g of sodium bisulfite after an interval of 10 minutes, continue to feed nitrogen for 10 minutes, then tur...

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Abstract

The invention discloses a papermaking fiber dispersing agent. The papermaking fiber dispersing agent comprises the following components in parts by weight: 20-40 parts of polymerizable organic acid monomers containing carboxyl, 30-40 parts of an alkali liquor, 10-20 parts of amide and 0.02-2 parts of a foaming agent. The invention also discloses a preparation method of the papermaking fiber dispersing agent. Through the addition of the foaming agent into the materials, a structure of countless micropores is formed in a colloid under the effect of reaction heat, so that the dissolution rate is quickened and the dissolution dispersibility is improved during dissolution; in addition, the PH value in the reaction is 7.0-8.5, the alkalinity is beneficial for increase of polymer molecules in linear direction, and the preparation method is easy in operation and high in stability; and moreover, polymerization can be triggered under a low temperature by using an azo-redox initiation system, and the reaction is smooth and steady, so that the increase of a molecular chain is facilitated, and the obtained polymer is high in molecular weight, narrow in molecular weight distribution and extremely low in monomer residual.

Description

technical field [0001] The invention belongs to the technical field of auxiliary agent preparation in papermaking technology. Specifically, it relates to a preparation method of a fiber dispersant. Background technique [0002] In the process of paper production, the plant fibers in the pulp-water suspension tend to flocculate into agglomerates, so that the fibers cannot be evenly dispersed in the water, resulting in poor evenness and uneven performance of the paper. The solution to fiber flocculation is to add a fiber dispersant is a simple and effective way to enhance the mechanical or hydraulic dispersion of the pulp-water suspension in the headbox and wire section. For the papermaking process, fibers, fillers and some additives are all water-insoluble, and tend to self-aggregate in water, and different materials are often far away from each other due to incompatibility, so it is difficult to obtain uniform performance and ideal strength. paper. Adding a dispersant can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/56C08F4/04C08F4/40C08F2/44C08J9/08D21H21/08
Inventor 张敏盛张益盛潘玉丽
Owner JIANGMEN GAOLIYI TECH IND
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