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Preparation method of dry powder type paper retention and filter aid

A retention and drainage aid, dry powder technology, applied in the direction of retention aid addition, papermaking, textiles and papermaking, etc., can solve the problems of application limitations, high cost, poor stability, etc.

Inactive Publication Date: 2009-10-14
东营市诺尔化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The currently used paper retention and drainage aids usually mainly include hydrosols or water emulsions and inverse emulsions, each of which has shortcomings or deficiencies such as low solid content, poor stability, or organic matter, high cost, and easy to cause secondary pollution. make the application restricted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment one, composition and weight proportion of raw material:

[0009] Acrylamide 300

[0010] Dimethyldiallyl ammonium chloride 45

[0011] Methacryloyloxyethyltrimethylammonium chloride 30

[0012] Isopropanol 0.008

[0013] Deionized water 510

[0014] Initiator potassium sulfate and sodium bisulfite 0.75

[0015] Urea 5

[0016] The process is:

[0017] ① Weigh dimethyl diallyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, acrylamide and deionized water into the reaction kettle. Stir to dissolve.

[0018] ②Under stirring, pass nitrogen gas to remove oxygen, and raise the temperature to 10°C.

[0019] ③ Add the weighed urea and isopropanol

[0020] ④ After dissolving the initiator with water, add it to the raw material monomer liquid, reflect for 3-8 hours, and mature for 1 hour.

[0021] ⑤Extrude the obtained colloid into the kneader under the pressure of 0.3-0.5MPa.

[0022] ⑥Dry and pulverize the obtained colloidal particles ...

Embodiment 2

[0023] Embodiment two, composition and weight proportion of raw material:

[0024] N.N-Dimethacrylamide 400

[0025] Diethyldimethyldiallylammonium chloride 35

[0026] Methacryloxypropyltrimethylammonium Chloride 20

[0027] Deionized water 400

[0028] Initiator V044 0.40

[0029] The process is:

[0030] ①Weigh N.N-methacrylamide, diethyldimethyldiallyl ammonium chloride, methacryloxypropyltrimethylammonium chloride and deionized water into the reaction kettle. Stir to dissolve.

[0031] ②Under stirring, pass nitrogen gas to remove oxygen, and raise the temperature to 20°C.

[0032] ③After dissolving the initiator with water, add it to the raw material monomer liquid, reflect for 3-8 hours, and mature for 1 hour.

[0033] ④Extrude the obtained colloid into the kneader under the pressure of 0.3-0.5MPa.

[0034] ⑤Dry and pulverize the colloidal particles in an airflow dryer at a low temperature below 70°C to obtain the product.

Embodiment 3

[0035] Embodiment three, composition and weight proportion of raw material:

[0036] Methacrylamide 500

[0037] Methacryloyloxyethyltrimethylammonium chloride 25

[0038] N,N-Dimethyldiallyl ammonium chloride 10

[0039] Isopropanol 0.03

[0040] Deionized water 320

[0041] Initiator ammonium persulfate and sodium bisulfite 0.15

[0042] Urea 13

[0043] The process is:

[0044] ①Weigh methacryloxyethyltrimethylammonium chloride, N,N-dimethyldiallylammonium chloride, methyl-acrylamide and deionized water into the reaction kettle. Stir to dissolve.

[0045] ②Under stirring, pass nitrogen gas to remove oxygen, and raise the temperature to 30°C.

[0046] ③ Add the weighed urea and isopropanol

[0047] ④ After dissolving the initiator with water, add it to the raw material monomer liquid, reflect for 3-8 hours, and mature for 1 hour.

[0048] ⑤Extrude the obtained colloid into the kneader under the pressure of 0.3-0.5MPa.

[0049] ⑥Dry and pulverize the obtained collo...

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PUM

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Abstract

The invention relates to a synthetic method of a paper retention and filter aid. The method adopts the scheme that the nonionic monomer, the cationic monomer and the deionized water are mixed according to the proportion (300-500:35-75:320-510) of weight ratio after nitrogen charging and oxygen removal at the temperature of 10-30 DEG C and under the stirring condition; and a water-soluble initiator with weight ratio of 0.12-0.83 is added with water for dissolution and then is added in the mixed liquor; and the polyreaction is carried out for 3-8 hours at the temperature of 0-90 DEG C. The invention is the copolymer of the acrylamide and the cationic monomer, the copolymer and the particles in the pulp are flocculated after electrical neutralization or bridging to be retained on the filter cloth, and the invention can improve the retention rate of the fiber fines and the filler particles on the net, promote the dehydration of the paper and reduce the loss volume of the fiber in the white water; and the invention not only can improve the surface properties of the paper, but also can enhance the tensile property of the paper.

Description

Technical field: [0001] The invention belongs to a synthesis method of a papermaking retention and drainage aid, and in particular relates to a preparation method of a dry powder polyacrylamide retention and drainage aid. Background technique: [0002] The currently used paper retention and drainage aids usually mainly include hydrosols or water emulsions and inverse emulsions, each of which has shortcomings or deficiencies such as low solid content, poor stability, or organic matter, high cost, and easy to cause secondary pollution. make the application restricted. Invention content: [0003] The object of the present invention aims at the defects existing in the existing additives, and proposes a new raw material configuration and production process, and a preparation method of a dry powder type papermaking retention and drainage aid with good water solubility. [0004] The technical solution of the present invention is: the ratio of non-ionic monomer, cationic monomer ...

Claims

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Application Information

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IPC IPC(8): D21H21/10D21H17/45
Inventor 荣敏杰李保福唐健
Owner 东营市诺尔化工有限责任公司
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