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Additive for treating paper-making sludge and preparation method thereof

A technology of papermaking sludge and additives, which is applied in the field of papermaking, can solve the problems of papermaking sludge flocculation, the decline of paper mechanical properties, and paper "fish eyes", so as to reduce the use and ensure the effect of mechanical properties

Pending Publication Date: 2018-07-13
威尔(福建)生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make the papermaking sludge can be better combined, it is necessary to add some positively charged substances, such as cationic polyacrylamide and cationic starch, because these additives are high molecular linear polymers or The reticular natural polymer can easily cause the flocculation of papermaking sludge, which will lead to longer dehydration time of the paper machine, "fish eyes" and holes in the paper, and the decline of the mechanical properties of the paper.

Method used

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  • Additive for treating paper-making sludge and preparation method thereof
  • Additive for treating paper-making sludge and preparation method thereof
  • Additive for treating paper-making sludge and preparation method thereof

Examples

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preparation example Construction

[0023] In the preparation method of the auxiliary agent for processing papermaking sludge of the present invention:

[0024] Further, the branched aromatic monomer A containing unsaturated groups is at least one of styrene, acrylbenzene, α-methylstyrene and allylaniline.

[0025] Further, the anionic monomer B is at least one of acrylic acid, linoleic acid, linolenic acid, crotonic acid, 3,3-dimethacrylic acid, methacrylic acid and 3-methyl-2-butenoic acid .

[0026] Further, the unsaturated monomer C is N-methylol methacrylamide, dimethylaminopropyl methacrylamide, N-butoxymethyl acrylamide, acrylamide, methacrylamide, formaldehyde At least one of acetylacryloylpropyltrimethylammonium chloride, N-(3-dimethylaminopropyl)methacrylamide and N-tert-butylcrotonamide.

[0027] Further, the cationic monomer D is dimethyldiallylammonium chloride, acryloyloxyethyltrimethylammonium chloride, N,N-dimethyl-N-benzyl-N-acrylamide At least one of ammonium chloride, diethyldiallylammonium...

Embodiment 1

[0040] The auxiliary agent for treating papermaking sludge in this embodiment is prepared from comonomers in the presence of initiators and emulsifiers, stirred in a solvent, and subjected to copolymerization and corresponding post-treatment.

[0041] Specifically, the specific preparation methods include:

[0042] 1. Raw materials

[0043] Monomer: Styrene (St);

[0044] Acrylic acid (AA);

[0045] N-(3-dimethylaminopropyl)methacrylamide (DMAA); and

[0046] Dimethyldiallylammonium Chloride (DADMAC).

[0047] The weight ratio is St:AA:DMAA:DADMAC=25:10:30:50.

[0048] Initiator: hydrogen peroxide / tartaric acid, that is, a redox initiator formed by combining hydrogen peroxide and tartaric acid, the molar ratio of hydrogen peroxide and tartaric acid is 1:0.8, and the total amount used in the reaction system is 1% of the total monomer weight 0.5%.

[0049] Emulsifier: OP-10, the total amount used in the reaction system is 6% of the total monomer weight.

[0050] Solvent: ...

Embodiment 2

[0055] The preparation method of the auxiliary agent used to treat papermaking sludge in this embodiment is basically the same as that of Example 1, except that the initiator in Example 1 is first thrown into the reactor by 10%, and it is mixed with St, OP-10 , 60% solvent water and 20% DMAA and 50% DADMAC solution are heated together, and the remaining initiator, emulsifier, water and monomer are made into the solution and added dropwise to the reaction kettle. Agent SP-2, the structural formula of SP-2 is:

[0056]

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Abstract

The invention relates to an additive for treating paper-making sludge and a preparation method thereof. The preparation method of the additive for treating the paper-making sludge comprises the following steps of: mixing comonomer, an initiator, an emulsifier and a solvent, and carrying out free-radical reaction or oxidation-reduction polymerization reaction to obtain the additive. The comonomer is prepared from the following raw materials in percent by weight: 20-40% of aromatic monomer A with branch chains containing no unsaturated groups, 0-20% of anionic monomer B, 20-50% of unsaturated monomer C and 30-60% of cationic monomer D, wherein the sum of the weight percentages of A, B, C and D is 100%. The additive for treating paper-making sludge has the advantages that no reduction of themechanical property of paper is ensured and the energy-saving and emission-reducing effects are achieved.

Description

technical field [0001] The invention relates to papermaking technology, in particular to an auxiliary agent for treating papermaking sludge and a preparation method thereof. Background technique [0002] With people's increasing awareness of environmental protection and strict requirements on the discharge of the three wastes of the paper industry, it has become more difficult to deal with the papermaking sludge of papermaking enterprises. [0003] The early treatment methods for papermaking sludge were sanitary landfill, aerobic composting, anaerobic fermentation, rotary kiln drying, or incineration for power generation. It is very harmful to land resources. Although incineration power generation solves part of the power problem, it will still cause air pollution and other problems after incineration. Therefore, for papermaking enterprises, especially large papermaking enterprises, the treatment of papermaking sludge is restricted. It is a crucial factor that determines wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/02C08F212/08C08F220/06C08F220/60C08F220/56C08F220/04D21H21/10
CPCC08F220/56C08F226/02D21H21/10C08F212/08C08F220/06C08F220/60C08F220/04
Inventor 曾祥庚黄继富邱炳生伍腾龙曾永坚余长泽
Owner 威尔(福建)生物有限公司