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Application of cationic etherification polyvinyl alcohol in gummy substance control

A technology of cationic etherification and stickies control, applied in paper, textile and papermaking, non-fibrous pulp addition, etc., can solve the problems of reducing the production efficiency of paper machines, and achieve the effect of reducing sticky deposits.

Active Publication Date: 2017-08-04
济宁南天农科化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an application of cationic etherified polyvinyl alcohol in sticky matter control, to solve or alleviate the problem of sticky matter deposition in the papermaking process, that is, to reduce sticky matter on the paper-making net, flow, etc. Deposition on the surface of the pulp box, screen and other mechanical equipment, and the resulting reduction in paper machine production efficiency and paper (board) quality problems

Method used

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  • Application of cationic etherification polyvinyl alcohol in gummy substance control
  • Application of cationic etherification polyvinyl alcohol in gummy substance control
  • Application of cationic etherification polyvinyl alcohol in gummy substance control

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Add 242.1g of distilled water (temperature lower than 30°C) into the four-necked bottle, start stirring, and slowly add 35.5g of polyvinyl alcohol 08835 at a slow and uniform rate to prevent the formation of lumps. Stir for 15 minutes, then raise the temperature to 90±5°C, and keep at 90±5°C for 60 minutes. Then cool down to 65°C, add 44.36g of 3-chloro-2-hydroxypropyltrimethylammonium chloride, add 65.72g of potassium hydroxide aqueous solution with a mass fraction of 20%, react at 65°C for 240min, then add hydrochloric acid to adjust the pH to 6-7. Finally, 108 g of distilled water was added and stirred evenly to obtain cationic etherified polyvinyl alcohol 1.

Embodiment 2

[0049] Add 228.42g of distilled water (temperature lower than 30°C) into the four-necked bottle, start stirring, and slowly add 33.5g of polyvinyl alcohol 08850 at a slow and uniform rate to prevent the formation of lumps. Stir for 15 minutes, then raise the temperature to 90±5°C, and keep at 90±5°C for 60min. Then cool down to 65°C, add 41.85g of 2,3-epoxypropyltrimethylammonium chloride, add 90g of sodium hydroxide aqueous solution with a mass fraction of 20%, react at 65°C for 240min, then add hydrochloric acid to adjust the pH to 6- 7. Finally, 102 g of distilled water was added and stirred evenly to obtain cationic etherified polyvinyl alcohol 2.

Embodiment 3

[0051] Add 228.42g of distilled water (temperature lower than 30°C) into the four-necked bottle, start stirring, and slowly add 33.5g of polyvinyl alcohol 08850 at a slow and uniform rate to prevent the formation of lumps. Stir for 15 minutes, then raise the temperature to 90±5°C, and keep at 90±5°C for 60min. Then cool down to 65°C, add 41.85g of 3-chloro-2-hydroxypropyltrimethylammonium chloride, add 72g of aqueous sodium hydroxide solution with a mass fraction of 20%, react at 65°C for 240min, and then add hydrochloric acid to adjust the pH to 6 -7. Finally, 102 g of distilled water was added and stirred evenly to obtain cationic etherified polyvinyl alcohol 3.

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Abstract

The invention discloses an application of cationic etherification polyvinyl alcohol as a control agent of a gummy substance in a pulping and papermaking process. The cationic etherification polyvinyl alcohol controls the gummy substance generated in the pulping and papermaking process. The cationic etherification polyvinyl alcohol is prepared by a reaction of polyvinyl alcohol and a cationic etherifying agent under the action of an alkaline catalyst. The cationic etherification polyvinyl alcohol has both a polyvinyl alcohol structure and a cationic quaternary ammonium group, thereby being capable of passivating the exposed surfaces of gummy substance particles to be not sticky, and further being capable of fixing gummy substance particles without stickiness to fibers to reduce deposition of the gummy substance on a machine wire, a headbox surface, a screen and the surfaces of other mechanical equipment while being used as the control agent of the gummy substance in the papermaking process, and solving the problems of lowered production efficiency of a paper machine and quality of paper (boards) caused by the deposition.

Description

technical field [0001] The invention belongs to the technical field of papermaking chemicals, and in particular relates to the application of cationic etherified polyvinyl alcohol in the control of stickies. Background technique [0002] During the papermaking process, the deposition of various organic pollutants on equipment and screens will reduce the papermaking efficiency of the paper machine, and at the same time reduce the quality of the paper (board). The main sources of organic pollutants are virgin pulp, waste paper (recycled fibers) and paints. Fresh pulp contains various natural resins, that is, hydrophobic organic compounds (resin acids, fatty acids, unsaponifiables and triglycerides, higher alcohols, etc.) that can be extracted by neutral organic solvents; waste paper (recycled fibers) In addition to the natural resin contained in the fiber raw materials, it also includes residual ink, deinking agent, tar, pressure-sensitive adhesive, hot-melt adhesive, sizing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/02D21H17/36
CPCD21H17/36D21H21/02
Inventor 黄军马朴张宗举李陶伟
Owner 济宁南天农科化工有限公司
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