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A papermaking retention aid and its preparation method and application

A technology of retention aid and auxiliary agent, applied in the direction of addition of retention aid, papermaking, textiles and papermaking, etc., can solve the problem of low retention rate of short fibers, achieve good retention effect, reduce white water turbidity, and improve retention. the effect of

Active Publication Date: 2021-10-01
SHANDONG NUOER BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem of low retention rate of short fibers in pulp by papermaking retention aids in the prior art, the present invention provides a papermaking retention aid and its preparation method and application

Method used

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  • A papermaking retention aid and its preparation method and application

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preparation example Construction

[0025] The present invention provides a method of preparing a papermaking agent, the method comprising the steps of:

[0026] (1) Mix the acrylamide, cationic monomer, structural modulator, hydrophobic monomer, N-vinylformamide, and cationic surfactant by water, to obtain a mixed liquid;

[0027] (2) The mixed liquid is oxygen, and then the polymerization aid is added to initiate the polymerization, obtain a gum, and then sequentially pass the glyph, dry and pulverize, to obtain a copolymer; In some specific embodiments, the step of breaking the bulk gel into a small piece of gel, and then a small piece of glue before granulating, drying, and pulping The conventional granulation is sequentially passed through granulation, dried and pulverized to obtain the copolymer;

[0028] (3) The copper powder is prepared by water into a copolyte aqueous solution, and then the liquid broform and aqueous sodium hydroxide aqueous solution are sequentially added to the copolypourne solution to ob...

Embodiment 1

[0046] The raw materials involved in the copolymerization process used in the present embodiment are as follows:

[0047] Acrylamide 120g, acryloyloxyethyltrimethylammonium chloride (cationic monomer) 60g, N, N-methylene bis acrylamide (structural modulator) 0.01 g, cephalkyl dimethylanyl Ammonium chloride (hydrophobic monomer) 3g, N-vinylformamide 20g, octadecyltrimethylammonium chloride (cationic surfactant) 5g, water 792 g, polymerization auxiliaries 0.13g, wherein polymerization aid It contains 0.02 g of sodium ethylenediamine, 0.02 g of sodium formate, 0.03 g of azo diisobutyrid, 0.03 g of ammonium sulfate, and ferrous sulfate 0.03 g.

[0048] The preparation method includes the following steps:

[0049] (A) copolymerization: Acrylamide, acryoyloxyethyltrimethyl chloride, N, N-methylene bis acrylamide, cetyl ammonium chloride, and acrylate, n, N-methylene bis acrylamide, cetyl ammonium chloride N-vinylformamide, octadecyl trimethylcylammonium chloride and water mixed with wat...

Embodiment 2

[0052] The raw materials involved in the copolymerization process used in the present embodiment are as follows:

[0053] Acrylamide 150g, methacryloxyethyltrimethyl ammonium chloride (cationic monomer) 90g, seasonal glutaiol triolene ether (structured modifier) ​​0.05 g, octadecyl dimethylanyl chloride Ammonium (hydrophobic monomer) 6 g, N-vinylformamide 30g, dodecyl dimethylbenzyl chloride (cationic surfactant) 8g, water 716g, polymerization auxiliaries 0.19g, wherein polymerization aid It contains 0.03 g of sodium ethylenediamine, 0.01 g of sodium formate, 0.1 g of azo di isodaryrile, 0.03 g ammonium sulfate, 0.02 g of sodium bisulfite.

[0054] The preparation method includes the following steps:

[0055] (A) copolymerization: Acrylamide, methacryloxyethyltrimethyl ammonium chloride, pentyl methacrylate ether, octadecyl dimethyl ammonium chloride, N- Vinylformamide, dodecyl dimethylbenzyl chloride is mixed with water, adjust the system pH to 4.0 with an amino sulfonic acid to ...

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Abstract

The invention relates to a papermaking retention aid and its preparation method and application, belonging to the technical field of preparation of modified polyacrylamide. The method is as follows: uniformly mix acrylamide, cationic monomer, structure regulator, hydrophobic monomer, N-vinyl formamide and cationic surfactant with water to obtain a mixed solution; nitrogen and deoxygenate the mixed solution, and then add The polymerization aid initiates the polymerization reaction to obtain a colloidal substance, and then the colloidal substance is granulated, dried and crushed in sequence to obtain a copolymerized powder; the copolymerized powder is prepared into an aqueous solution of the copolymerized powder with water, and then liquid bromine and The sodium hydroxide aqueous solution is modified to obtain a modified treatment solution; the pH of the modified treatment solution is adjusted to 8-9, and then filtered through a filter membrane to obtain a paper-making retention aid. The papermaking retention aid prepared by the invention improves the retention rate of fine fibers, and when used in a papermaking process, can improve papermaking production efficiency, avoid blocking of water filtration channels, and effectively reduce white water turbidity.

Description

Technical field [0001] The present invention relates to the field of modified polyacrylamide preparation, and more particularly to a papermaking retention agent and a preparation method thereof. Background technique [0002] During the paper production, there will be many fine fibers (fine fibers) in the slurry, and the small fiber leaves low, which will waste it through white water, and fine fibers will accumulate in the bottom of the filter, affect the filter function of the paper. The quality of the paper has a poor impact, so the paper-free retention agent is added to the network during the paper, and the retention of the fine fibers will increase the dehydration performance of the paper. Papermaking agent is substantially inorganic, such as aluminum sulfate, sodium aluminate, etc. (not significant); cationic starch; carboxymethylcellulose; synthetic resin (such as polyethyleneimine, polyacrylamide, polyethylene oxide) , Polyamide, etc.). [0003] At present, the mainstream p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F8/22C08F220/34C08F222/38C08F226/02C08F222/20D21H21/10D21H17/45
CPCC08F8/22C08F220/56D21H17/45D21H21/10C08F220/34C08F222/385C08F226/02C08F222/104
Inventor 荣敏杰孙建波许永升于庆华荣帅帅
Owner SHANDONG NUOER BIOLOGICAL TECH
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