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Waste newspaper-neutral deinking agent for waste book paper, preparation method and deinking method

A technology of neutral deinking agent and waste newspaper, which is applied in the preparation of neutral deinking agent for waste newspaper-waste book paper, in the field of neutral deinking agent for waste newspaper-waste book paper, and can solve strong alkaline deinking wastewater High COD, increased difficulty in wastewater treatment, ecological environment pollution, etc., to achieve good deinking effect, reduce treatment difficulty, and low pollution load.

Inactive Publication Date: 2011-12-14
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alkaline deinking process is relatively mature, and the deinking efficiency is relatively high, but there are many shortcomings in alkaline deinking
One of the disadvantages is that because the deinking method is carried out in a strong alkaline environment, the strong alkaline deinking wastewater formed after deinking has a high COD, which makes wastewater treatment more difficult
If it is discharged into nature without treatment, it will cause huge pollution to the ecological environment, which seriously violates the scientific development concepts such as "energy saving and emission reduction" and "green environmental protection"; not only that, because the strong alkalinity of the deinking process is also easy to make the pulp "Alkaline blackening" problem occurs during deinking process, affecting pulp brightness

Method used

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  • Waste newspaper-neutral deinking agent for waste book paper, preparation method and deinking method

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preparation example Construction

[0032] The preparation method of the waste newspaper-waste book paper neutral deinking agent of the present invention comprises the following steps:

[0033] Step 1. Weigh the following components in parts by weight: 10-15 parts of sodium stearate, 15-20 parts of sodium lauryl sulfate, 25-35 parts of alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene 20-30 parts of vinyl ether, 20-30 parts of water;

[0034] Step 2. Pour the water weighed in step 1 into the reaction kettle, heat it to 60°C ~ 75°C, add sodium stearate, stir at a speed of 100r / min±10 until it is completely dissolved; reduce the stirring speed to 50r / min±10, sequentially add sodium lauryl sulfate, alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether, after fully dissolved, continue to stir for 30min~50min, let it stand, and cool naturally to obtain.

[0035] The present invention uses the deinking method of waste newspaper-waste book paper neutral deinking agent, is characteri...

Embodiment 1

[0040] Waste newspapers-waste book paper neutral deinking agent, according to parts by weight, consists of the following components: 10 parts of sodium stearate, 20 parts of sodium lauryl sulfate, 30 parts of alkylphenol polyoxyethylene ether, fat 20 parts of alcohol polyoxyethylene ether, 20 parts of water.

[0041] The preparation method of this waste newspaper-waste book paper neutral deinking agent comprises the following steps:

[0042] Step 1, weighing the above-mentioned components according to parts by weight;

[0043] Step 2. Pour the water weighed in step 1 into the reactor, heat it to 65°C, add sodium stearate, and stir at a speed of 100r / min until it is completely dissolved; reduce the stirring speed to 50r / min, and then add Sodium lauryl sulfate, alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether, after fully dissolving, continue to stir for 30min, stand still, cool naturally, obtain the neutral deinking of waste newspaper-waste book paper ...

Embodiment 2

[0049] Waste newspapers-waste book paper neutral deinking agent, according to parts by weight, consists of the following components: 10 parts of sodium stearate, 15 parts of sodium lauryl sulfate, 35 parts of alkylphenol polyoxyethylene ether, fat 20 parts of alcohol polyoxyethylene ether, 20 parts of water.

[0050] The preparation method of this waste newspaper-waste book paper neutral deinking agent comprises the following steps:

[0051] Step 1, weighing the above-mentioned components according to parts by weight;

[0052] Step 2. Pour the water weighed in step 1 into the reaction kettle, heat it to 65°C, add sodium stearate, and stir at a speed of 90r / min until it is completely dissolved; reduce the stirring speed to 50r / min, and then add Sodium lauryl sulfate, alkylphenol polyoxyethylene ether and fatty alcohol polyoxyethylene ether, after fully dissolving, continue to stir for 40min, let stand, cool naturally, obtain the neutral deinking of waste newspaper-waste book p...

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Abstract

The invention relates to a neutral deinking agent for waste newspaper and waste book and periodical paper. The neutral deinking agent consists of the following components: sodium stearate, lauryl sodium sulfate, alkylphenol polyoxyethylene, fatty alcohol-polyoxyethylene ether and water. A preparation method for the neutral deinking agent comprises the following steps of: weighing the components, pouring the weighed water into a reaction kettle, adding the sodium stearate and stirring until the sodium stearate is dissolved completely, adding other components, keeping stirring, standing and naturally cooling, and thus obtaining the neutral deinking agent. A deinking method comprises the following steps of: shearing the waste newspaper and the waste book and periodical paper into blocks, mixing the blocks uniformly and placing the mixture into a container; and adding the neutral deinking agent, adding hot water to dilute the neutral deinking agent, and performing heat preservation, size degradation and flotation sequentially. By the neutral deinking agent for the waste newspaper and the waste book and periodical paper, the problems of high corrosiveness and environmental pollution caused by alkaline deinking agents in the prior art can be solved, and a deinking effect is good. The preparation method is simple in process and easy to implement. The deinking method has a good deinking effect and is environment-friendly and energy-saving.

Description

technical field [0001] The invention belongs to the technical field of recycling waste printing materials, and in particular relates to a neutral deinking agent for waste newspaper-waste book paper, a preparation method of the neutral deinking agent for waste newspaper-waste book paper, and the use of the waste Newspaper - deinking method of waste book paper with neutral deinking agent. Background technique [0002] Waste newspapers and waste book paper are two main types of waste paper used in domestic deinking pulp production lines, and they are also the main waste paper raw materials imported by my country every year. For example, in 2003, 2.8877 million tons of used newsprint and used book paper were imported, accounting for 31.31% of the total amount of waste paper imported that year. According to the statistics of China Paper Association, in 2009, my country consumed 4.61 million tons of newsprint and 14.97 million tons of uncoated printing and writing paper. After t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02C09D9/00
CPCY02W30/64
Inventor 张效林
Owner XIAN UNIV OF TECH
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