Papermaking retention aid, preparation method and application thereof

A technology of retention aids and additives, which is applied in the direction of addition of retention aids, papermaking, textiles, and papermaking. It can solve the problems of low retention rate of short and small fibers, achieve good retention effect, reduce white water turbidity, and improve retention. The effect of the rate

Active Publication Date: 2021-08-13
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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  • Papermaking retention aid, preparation method and application thereof

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preparation example Construction

[0025] The present invention provides a kind of preparation method of papermaking retention aid in the first aspect, described method comprises the steps:

[0026] (1) Mix acrylamide, cationic monomer, structure regulator, hydrophobic monomer, N-vinyl formamide and cationic surfactant with water to obtain a mixed solution;

[0027] (2) Nitrogen is passed through the mixed liquid to remove oxygen, and then a polymerization assistant is added to initiate a polymerization reaction to obtain a jelly, and then the jelly is sequentially granulated, dried and crushed to obtain a copolymerized powder; In some specific embodiments, before the jelly is granulated, dried and pulverized, it also includes the step of breaking the large jelly into small pieces of jelly, and then the small piece of jelly The solids are sequentially granulated, dried and pulverized to obtain the copolymerized powder;

[0028] (3) Prepare the copolymerized powder with water into an aqueous copolymerized powde...

Embodiment 1

[0046] The raw materials involved in the copolymerization process used to prepare paper retention aids in this embodiment are as follows:

[0047] 120g of acrylamide, 60g of acryloyloxyethyltrimethylammonium chloride (cationic monomer), 0.01g of N,N-methylenebisacrylamide (structure regulator), hexadecyldimethylallyl Ammonium chloride (hydrophobic monomer) 3g, N-vinylformamide 20g, octadecyltrimethylammonium chloride (cationic surfactant) 5g, water 792g, polymerization aid 0.13g, of which, polymerization aid Contains 0.02g of disodium edetate, 0.02g of sodium formate, 0.03g of azobisisobutylamidine dihydrochloride, 0.03g of ammonium persulfate, and 0.03g of ferrous sulfate.

[0048] The preparation method comprises the following steps:

[0049] (a) Copolymerization: Add acrylamide, acryloyloxyethyltrimethylammonium chloride, N,N-methylene bisacrylamide, hexadecyldimethylallyl ammonium chloride, After mixing N-vinylformamide, octadecyltrimethylammonium chloride and water even...

Embodiment 2

[0052] The raw materials involved in the copolymerization process used to prepare paper retention aids in this embodiment are as follows:

[0053] Acrylamide 150g, methacryloxyethyltrimethylammonium chloride (cationic monomer) 90g, pentaerythritol triallyl ether (structure regulator) 0.05g, octadecyldimethylallyl chloride Ammonium (hydrophobic monomer) 6g, N-vinylformamide 30g, dodecyldimethylbenzyl ammonium chloride (cationic surfactant) 8g, water 716g, polymerization aid 0.19g, of which, polymerization aid Contains 0.03 g of disodium edetate, 0.01 g of sodium formate, 0.1 g of azobisisoheptanonitrile, 0.03 g of ammonium persulfate, and 0.02 g of sodium bisulfite.

[0054] The preparation method comprises the following steps:

[0055] (a) Copolymerization: Add acrylamide, methacryloyloxyethyltrimethylammonium chloride, pentaerythritol triallyl ether, octadecyldimethylallyl ammonium chloride, N- After mixing vinylformamide, dodecyldimethylbenzyl ammonium chloride and water e...

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Abstract

The invention relates to a papermaking retention aid, a preparation method and application thereof, and belongs to the technical field of preparation of modified polyacrylamide. The method comprises the following steps: uniformly mixing acrylamide, a cationic monomer, a structure regulator, a hydrophobic monomer, N-vinylformamide and a cationic surfactant with water to obtain a mixed solution; introducing nitrogen into the mixed solution to remove oxygen, then adding a polymerization additive to initiate a polymerization reaction to obtain jelly, and then sequentially granulating, drying and crushing the jelly to obtain copolymer powder; preparing the copolymer powder into a copolymer powder aqueous solution by using water, and then sequentially adding liquid bromine and a sodium hydroxide aqueous solution for modification treatment to obtain a modified treatment solution; and adjusting the pH value of the modified treatment solution to 8-9, and then filtering through a filter membrane to obtain the papermaking retention aid. The papermaking retention aid prepared by the invention improves the retention rate of fine fibers, and when the papermaking retention aid is used in a papermaking process, the papermaking production efficiency can be improved, the blockage of a water filtering channel is avoided, and the turbidity of white water can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of preparation of modified polyacrylamide, in particular to a papermaking retention aid and its preparation method and application. Background technique [0002] During the papermaking process, there will be a lot of fine fibers (fine fibers) in the slurry, the retention rate of fine fibers is low, and they will be wasted through white water, and the fine fibers will accumulate at the bottom of the filter screen, affecting the water filtration function of the paper industry , has a negative impact on the quality of paper, so in the process of papermaking, 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. Paper retention aids generally include inorganic substances such as aluminum sulfate, sodium aluminate, etc. (the retention effect is not significant); cationic starch; carboxymethyl cellulose...

Claims

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Application Information

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Patent Type & Authority Applications(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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