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Water-based composite deinking agent

A deinking agent, water-based technology, applied in the direction of chemical paint/ink remover, coating, papermaking, etc., can solve the problems of reduced whiteness of pulp, difficult to popularize and apply, poor foaming, etc., to improve the whiteness of pulp , Improve deinking effect, good emulsification effect

Inactive Publication Date: 2008-10-08
SHANGHAI UNIV OF ENG SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the deinking process of waste newsprint, due to the separation, deposition, and re-separation of the ink during the waste paper shredding process, until irreversible redeposition, the whiteness of the pulp after deinking is reduced.
[0004] For this reason, many patents have reported the deinking agent of paper deinking separately, as Chinese patent application number: 200410015511.7 disclosed technology, and application number: 02137023.0, disclosed technology, above-mentioned patent, all adopts biological enzyme as raw material, deinking The treated waste liquid contains biological enzymes, which cause some pollution to the environment and are difficult to popularize and apply;
[0005] Chinese patent application number 200480010660.2 provides a deinking agent, including C 7-23 Aliphatic hydrocarbon-based, oxyethylene-based, and oxypropylene-based and / or oxybutylene-based compounds, which have poor foaming properties although the deinking agent has satisfactory biodegradability and reduced pollution imposed on the environment , generally not used alone for flotation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Tear the paper pattern into 2cm×5cm pieces, mix them evenly, balance the water and set aside.

[0041] Water-based composite deinking agent body weight percentage:

[0042] Alkyl fatty alcohol polyoxypropylene polyoxyethylene ether phosphate 0.3%;

[0043] Sodium alkyl fatty alcohol polyoxyethylene ether sulfate 0.2%;

[0044] NaOH 1.5%;

[0045] NaSiO 3 3.0%;

[0046] h 2 o 2 1.5%;

[0047] 1,3-Dimethyl-2-imidazolinone 1.0%;

[0048] The rest is water.

[0049] Weigh a certain amount of dry sample and the above-mentioned proportioning water-based composite deinking agent solution and place it in a pulp disintegrator, adjust the weight content of the pulp to 15%, disintegrate at 60°C for 60 minutes, and dilute the pulp To a weight content of 0.8%, flotation by flotation machine for 4 minutes.

[0050] Use the laboratory ZCQ paper sheet former to copy the sheets, and the quantitative control is a...

Embodiment 2

[0052] Tear the paper pattern into 2cm×5cm pieces, mix them evenly, balance the water and set aside. Water-based composite deinking agent weight percent:

[0053] Alkyl fatty alcohol polyoxypropylene polyoxyethylene ether phosphate 0.3%;

[0054] Sodium alkyl fatty alcohol polyoxyethylene ether sulfate 0.2%;

[0055] NaOH 1.5%;

[0056] NaSiO 3 3.0%;

[0057] h 2 o 2 1.5%;

[0058] 1,3-Dimethyl-2-imidazolinone 1.5%;

[0059] The rest is water.

[0060] Weigh a certain amount of dry sample and the above-mentioned proportioning water-based composite deinking agent solution in a high-consistency pulp disintegrator, adjust the weight content of the pulp to about 15%, and disintegrate at a temperature of 60°C for 60 minutes to disintegrate the pulp Dilute it to a weight content of 1.2%, and float for 4 minutes through a flotation machine. Use the laboratory ZCQ paper sheet former to copy the sheets, and the q...

Embodiment 3

[0062] Tear the paper pattern into 2cm×5cm pieces, mix them evenly, balance the water and set aside. Water-based composite deinking agent weight percent:

[0063] Alkyl fatty alcohol polyoxypropylene polyoxyethylene ether phosphate 0.3%;

[0064] Sodium alkyl fatty alcohol polyoxyethylene ether sulfate 0.2%;

[0065] NaOH 1.5%;

[0066] NaSiO 3 3.0%;

[0067] h 2 o 2 1.5%;

[0068] 1,3-Dimethylpropylene imidazolinone 1.0%;

[0069] The rest is water.

[0070] Weigh a certain amount of dry sample and the above ratio water-based composite deinking agent solution in a high-consistency pulp disintegrator, adjust the pulp content to about 15%, disintegrate at 60°C for 60 minutes, and dilute the pulp To the content of 1%, flotation by flotation machine for 4 minutes. Use the laboratory ZCQ paper sheet former to copy the sheets, and the quantitative control is at 60 g / m 2 , and then dried and measured using ...

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Abstract

The invention provides a water-based compound deinking agent which has the following components based on weight percentage: 0.1-3% of alkyl poly propylene fatty alcohol polyoxyethylene ether phosphate, 0.1-5% of alkyl alcohol polyoxyethylene ether sulfate, 1-5% of NaOH, 2-8% of NaSiO3, 0.5-5% of H2O2, 0.5-8% of anti-ink deposition agent, and the remaining amount of water. The water-based compound deinking agent of the invention has the advantages that the invention has good emulsification, dispersion and catching performances and can reduce the re-deposition of printing ink particles in the deinking process, improve the pulp brightness, reduce the residual ink particles and improve the deinking effect so as to achieve high-efficient and environmental-friendly recycling of waste newspapers.

Description

technical field [0001] The invention relates to a deinking agent for paper deinking. Background of the invention [0002] Waste paper recycling has become an important material source of paper and pulp in my country. Recycling waste paper as secondary fiber can effectively protect forest resources, reduce environmental pollution, reduce papermaking costs and improve the international competitiveness of the papermaking industry. According to statistics, in 2005, the total output of paper and cardboard in my country reached 52.1 million tons, and the total consumption was 54.7 million tons, an increase of 13.76% and 10.94% respectively compared with 2004, accounting for about 10% and 14% of the world's total respectively, ranking first in the world. Second, second only to the United States. And my country is a country that is extremely short of wood fiber raw materials, the forest coverage rate is only 13.2%, while the world's average forest coverage rate is 31%, and my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04D21C5/02
CPCY02W30/64
Inventor 肖稳发李洪森杨斌饶品华徐菁利肖志发藤飞
Owner SHANGHAI UNIV OF ENG SCI
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