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Preparation process of retention aid for papermaking

A technology for preparation process and retention aid, which is applied in the field of preparation process of retention aid for papermaking, can solve the problems of complex preparation process and many raw materials, and achieve the effect of simple preparation process, simple equipment and good retention effect

Inactive Publication Date: 2011-08-17
LEE & MAN PAPER MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 200410049606.0 Paper Mineral Composite Retention Aid and Its Preparation Method and Application discloses a scheme of using multiple minerals to prepare retention aid, but the technical scheme uses more raw materials and the preparation process is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation process of a retention aid for papermaking, comprising the following steps.

[0031] a, Select bentonite powder as raw material. Studies have found that bentonite has a fine microporous structure and a higher specific surface area, and can replace silica gel as a retention aid for papermaking. Since bentonite is a mineral raw material, it will not pollute the environment and is more environmentally friendly.

[0032] b. Pour the bentonite powder into a powder opener, and the powder opener transports the bentonite powder into a pre-dispersion tank in a screw feeding manner.

[0033] c. Add water into the pre-dispersion tank. The mass percentage of bentonite and water can be 2:100-5:100. Stir and mix the bentonite and the water evenly to obtain a bentonite solution.

[0034] d. Pass the bentonite solution prepared in step c through a 80-100 mesh sieve to remove large particles in the bentonite solution, and transport the sieved bentonite solution to a dist...

Embodiment 2

[0039] A preparation process of a retention aid for papermaking, comprising the following steps.

[0040] a. Select bentonite powder with a particle size not greater than 0.20 μm as the raw material. Studies have found that bentonite has a fine microporous structure and a higher specific surface area, and can replace silica gel as a retention aid for papermaking. Since bentonite is a mineral raw material, it will not pollute the environment and is more environmentally friendly.

[0041] b. Pour the bentonite powder into the pulverizer, and the pulverizer transports the bentonite powder to the pre-dispersion tank in a screw feeding manner, and the pulverizer works at a speed of 50-120 rad / min.

[0042] c. Add water into the pre-dispersion tank. The mass percentage of bentonite and water can be 2:100-5:100. Stir and mix the bentonite and the water evenly to obtain a bentonite solution.

[0043] d. Pass the bentonite solution prepared in step c through a 80-100 mesh sieve to re...

Embodiment 3

[0048] A preparation process of a retention aid for papermaking, comprising the following steps.

[0049] a, Select bentonite powder with a particle size of 0.01 μm as the raw material. Studies have found that bentonite has a fine microporous structure and a higher specific surface area, and can replace silica gel as a retention aid for papermaking. Since bentonite is a mineral raw material, it will not pollute the environment and is more environmentally friendly.

[0050] b. Pour the bentonite powder into the pulverizer, and the pulverizer transports the bentonite powder to the pre-dispersion tank in a screw feeding manner, and the pulverizer works at a speed of 50 rad / min.

[0051] c. Add water into the pre-dispersion tank, the mass percentage of bentonite and water is 2:100, stir and mix the bentonite and the water evenly to obtain a bentonite solution.

[0052] d. Pass the bentonite solution prepared in step c through an 80-mesh sieve to remove large particles in the ben...

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Abstract

The invention relates to a preparation process of retention aid for papermaking, which comprises the following steps: a. selecting bentonite powder as a raw material; b. pouring the bentonite powder into a pulverizer, and transmitting the bentonite powder by the pulverizer into a pre-dispersing tank in a spiral feeding manner; c. adding water in the pre-dispersing tank, and uniformly mixing to obtain a bentonite solution, and the mass percentage of the bentonite powder and the water is 2:100-5:100; d. sieving and removing large particles by a sieve with 80-100meshes, and transmitting the sieved bentonite powder into the pre-dispersing tank; and e. further diluting and dispersing the bentonite solution in the pre-dispersing tank to obtain a bentonite suspension solution, and finally, manufacturing the retention agent for the papermaking. The preparation process is simple, and the prepared retention agent for the papermaking has the characteristics of environmental-protection and good retention effect.

Description

technical field [0001] The invention relates to the technical field of retention aids, in particular to a preparation process of retention aids for papermaking. Background technique [0002] Retention aid is one of the indispensable raw materials in the papermaking industry. Because it has the function of retaining fillers and fine fibers, it can reduce the loss of fine fibers in pulp, reduce the consumption of raw materials, and improve the quality of paper, so it is widely used in the papermaking industry. . Most of the retention aids are chemical retention aids, but the use of chemical retention aids often produces harmful substance residues during production, which cannot be reused, and the cost of sewage treatment is relatively high. In order to solve the above problems, in recent years, non-metallic mineral materials have also been used as retention aids in papermaking by utilizing the unique properties of non-metallic mineral materials. Chinese patent 200410049606.0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/10D21H17/68
Inventor 李文斌
Owner LEE & MAN PAPER MFG