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Special anion garbage capturing agent for paper making

An anionic waste and scavenger technology, applied in papermaking, textile and papermaking, non-fibrous pulp addition, etc., to achieve the effects of easy control, improved retention, and improved wet end conditions

Inactive Publication Date: 2011-04-06
天津市奥东化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the closed water cycle in the paper machine operation, the water quality deteriorates and various impurities are gradually concentrated. The pipeline equipment in the system is prone to blockage, and the suspended solids are likely to cause water spray pipes, paper machine wires and felts to be blocked, and will be deposited on the flow box lip The turning roll of the plate and wire part dissolves solids and metal salts, which can cause precipitation and scaling, as well as corrosion and affect sizing
The deposition of metal ions can produce high-efficiency corrosion on production equipment and affect the normal operation of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A special anionic garbage catcher for papermaking, which is dissolved and emulsified with polyacrylamide, polyethyleneimine, charge regulator and crosslinking agent, and crosslinked to generate polyacrylamide-polyethyleneimine crosslinked polymer. Performance characteristics Polyacrylamide-polyethyleneimine cross-linked polymer compound has large molecular weight, high positive charge density, good stability, and network structure characteristics. The preparation method is:

[0012] (1) Melt the intermediate polyacrylamide in an aqueous solution, dissolve it in the aqueous solution at 95 degrees for 1 hour, add ammonium dihydrogen phosphate and polyacrylamide at 70 degrees, and add polyethylene after fully dissolving for 1 hour Imine, continue to fully dissolve for 1 hour, wherein the weight ratio of polyacrylamide, ammonium dihydrogen phosphate, and polyethyleneimine is 1:0.1:0.6. During the operation, the sample extract is a transparent viscous body as the termination ...

Embodiment 2

[0015] A special anionic garbage catcher for papermaking, the preparation method of which is:

[0016] (1) Melt the intermediate polyacrylamide in the aqueous solution, dissolve it in the aqueous solution at 95 degrees for 1 hour, add ammonium dihydrogen phosphate and polyacrylamide at 70 degrees, and add polyethylene after fully dissolving for 1 hour Imine, continue to fully dissolve for 1 hour, wherein the weight ratio of polyacrylamide, ammonium dihydrogen phosphate, and polyethyleneimine is 1:1:1.2. During the operation, the sample extract is a transparent viscous body as the termination point ;

[0017] (2) The polyacrylamide-polyethyleneimine mixed polymer is modified by cross-linking reaction. After the above step (1) mixes the solute and speeds up, add glutaraldehyde to continue the reaction for 0.5 hours, and the reaction ends. The mass ratio of the mixture is 0.002:1, and the reaction is terminated by adjusting the pH value to 6 with wax acid.

Embodiment 3

[0019] A special anionic garbage catcher for papermaking, the preparation method of which is:

[0020] (1) Melt the intermediate polyacrylamide in the aqueous solution, dissolve it in the aqueous solution at 95 degrees for 1 hour, add ammonium dihydrogen phosphate and polyacrylamide at 70 degrees, and add polyethylene after fully dissolving for 1 hour Imine, continue to fully dissolve for 1 hour, wherein the weight ratio of polyacrylamide, ammonium dihydrogen phosphate, and polyethyleneimine is 1:0.5:1. During the operation, the sample extract is a transparent viscous body as the termination point ;

[0021] (2) The polyacrylamide-polyethyleneimine mixed polymer is modified by cross-linking reaction. After the above step (1) mixes the solute and speeds up, add glutaraldehyde to continue the reaction for 0.5 hours, and the reaction ends. The mass ratio of the mixture is 0.002:1, and the reaction is terminated by adjusting the pH value to 5 with wax acid.

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PUM

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Abstract

The invention relates to a special anion garbage capturing agent for paper making. A preparation method for the capturing agent comprises the following steps of: carrying out hot melting on midbody polyacrylamide in an aqueous solution; completely dissolving the midbody in the aqueous solution at the temperature of 95 DEG C for one hour; adding 0.1-1 part of ammonium dihydrogen phosphate and 1 part of polyacrylamide in parts by weight at the temperature of 70 DEG C; sufficiently dissolving for one hour and then adding 0.6-1.2 parts of polymine; continuing sufficiently fusing for one hour; modifying 1 part of polyacrylamide-polymine mixture through cross-linking reaction; and then adding 0.002 part of glutaraldehyde to continue reacting for 0.5 hour to obtain the capturing agent. The invention has the advantages that the novel anion garbage capturing agent of a high molecular weight high-positive charge density modified polyacrylamide-polymine crosslinking body has the performance characteristics that the capturing agent can be used under the conditions that the wet end chemistry becomes very complicated, the anion garbage accumulates and the density becomes higher and higher in the environment that the water closed cycle degree of a paper machine is improved, and the interference of colloid dissolved matter can be reduced or eliminated.

Description

technical field [0001] The invention belongs to papermaking chemical auxiliary agents, in particular to an anionic garbage catcher specially used for papermaking. Background technique [0002] At present, with the gradual improvement of low-carbon economy and environmental protection awareness, the implementation of waste paper recycling has become the most important green economy to solve the source of pulp, and it is the best effective resource to solve the shortage of pulp. After the closed cycle of white water is implemented, the consumption of clean water and fiber can be reduced, and a lot of water resources, heat energy and raw materials can be saved. At the same time, zero discharge of sewage is achieved, which solves a major public hazard of papermaking wastewater polluting the environment. Due to the continuous improvement of the degree of closed water, the concentration of organic and inorganic substances in the system has increased, which has enriched the condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/00C08L33/26C08L79/02
Inventor 田成杰李端吴连海李伯平
Owner 天津市奥东化工有限公司
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