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Synchronous remover for mixed impurities of ink and adhesive in waste paper, and preparation method thereof

A sticky matter and remover technology, which is applied in the field of sticky matter removal and ink in waste paper pulping, can solve the problems that cannot meet the needs of production practice, and achieve the goals of reducing energy consumption, easy preparation, and improving production efficiency Effect

Inactive Publication Date: 2012-06-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the current situation where the quality of waste paper raw materials is deteriorating, still researching the two issues of deinking and stickies separately cannot meet the needs of production practice. Only by looking at this issue comprehensively and studying the comprehensive removal effect of impurities will be more meaningful Practical significance

Method used

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  • Synchronous remover for mixed impurities of ink and adhesive in waste paper, and preparation method thereof
  • Synchronous remover for mixed impurities of ink and adhesive in waste paper, and preparation method thereof
  • Synchronous remover for mixed impurities of ink and adhesive in waste paper, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) The alkaline pulping waste liquid is prepared into a solution with a mass fraction of 10%, and the lignin raw material in the solution is classified by an ultrafilter, and the part with a molecular weight between 3000 and 5000 is taken, concentrated and dried to obtain Refined lignin raw materials;

[0030] (2) Take 100g of refined lignin raw material, add 600ml of 10% NaOH solution and 1500ml of 37% formaldehyde solution, then add water to 2500ml, and react at 80°C for 2h; after the reaction, adjust the pH with 10% dilute hydrochloric acid < 3. The product was precipitated, centrifuged, the supernatant was removed, the precipitate was washed 3 times with water with pH=2, and then vacuum-dried at 35°C to obtain a lignin-modified product;

[0031] (3) calcining diatomite raw soil at 500°C for 0.5h to obtain calcined diatomite;

[0032] (4) Add 400ml of water to the reactor, put 100g of calcined diatomaceous earth into the reactor, and dissolve 1g of dodecyltrimethyl...

Embodiment 2

[0036] (1) Adjust the acidic sulfite pulping waste liquid into a solution with a mass fraction of 12%, use an ultrafilter to classify the lignin raw material in the solution, take the part with a molecular weight between 3000 and 5000, concentrate and dry processing to obtain refined lignin raw materials;

[0037] (2) Get 100g of refined lignin raw material, add 1000ml10% NaOH solution and 1500ml37% formaldehyde solution, then add water to 3000ml, react at 40°C for 5h; Vacuum drying at ℃ to obtain a lignin modified product;

[0038] (3) calcining bentonite raw soil at 300°C for 1.5h to obtain calcined bentonite;

[0039] (4) Add 400ml of water to the reactor, put 100g of calcined diatomaceous earth into the reactor, and dissolve 5g of cetyltrimethylammonium chloride in 100ml of water, add it to the reactor, and then react Put the device into the ultrasonic generator, and ultrasonically treat it for 48 hours at a frequency of 80KHz and a temperature of 60°C;

[0040] (5) Aft...

Embodiment 3

[0043] (1) Prepare lignosulfonate into a solution with a mass fraction of 10%, use an ultrafilter to classify the lignin raw material in the solution, take the part with a molecular weight between 3000 and 5000, concentrate and dry it, and obtain refined lignin raw material;

[0044] (2) Get 200g of refined lignin raw material, add 1200ml10% NaOH solution and 2000ml37% formaldehyde solution, then add water to 3500ml, and react at 60°C for 3h; after the reaction is completed, the reaction solution is concentrated by rotary evaporation, and then Vacuum drying at 50°C to obtain a lignin-modified product;

[0045](3) calcining palygorskite raw soil at 400°C for 1 hour to obtain calcined palygorskite;

[0046] (4) Add 400ml of water to the reactor, put 100g of calcined diatomaceous earth into the reactor, and dissolve another 3g of tetradecyltrimethylammonium bromide with 100ml of water, add it to the reactor, and then react Put the device into an ultrasonic generator, and ultras...

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Abstract

The invention provides a synchronous remover for mixed impurities of ink and adhesive in waste paper, and preparation method thereof. The preparation method comprises the steps of: firstly, ultra-filtering lignin raw materials or pulping waste liquor and classifying, taking components of which molecular weights are in a range from 3, 000 to 5, 000; and then carrying out hydroxymethylation modification to the components and formaldehyde in alkaline condition, obtaining modified lignin product; roasting inorganic mineral clay, and then modifying the inorganic mineral clay by using alkylammonium, obtaining modified organic mineral clay; and compounding 12%-20% of the modified lignin product, 15-%-20% of ink capturing agent, 8%-12% of penetrating agent or emulsifying agent, 1%-5% of foam stabilizer, and the balance of the modified organic mineral clay according to a formula, thereby obtaining the synchronous remover (wherein the percentages are all mass percentages). The preparation method disclosed by the invention is simple; the synchronous remover obtained by the preparation method has excellent effects to increase of whiteness in secondary fiber pulping and flotation and to removal of the ink and the adhesive.

Description

technical field [0001] The invention relates to the removal of ink and stickies in waste paper pulping, in particular to an agent for synchronously removing mixed impurities of waste paper ink and stickies and a preparation method thereof. Background technique [0002] Secondary fiber is one of the important raw materials for papermaking, and the recycling of waste paper is an effective way to solve the problems of raw material shortage and serious pollution faced by the papermaking industry. The use of waste paper to produce recycled paper has many advantages such as less environmental pollution, simple process flow, and low energy consumption, and has good economic and social benefits. [0003] Compared with the original plant fiber raw materials, waste paper generally does not contain plant raw materials such as pectin, resin, solvent extracts, ash, and natural organic and inorganic impurities. The main components of waste paper are cellulose and hemicellulose, followed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02D21C9/08D21H21/00
CPCY02W30/64
Inventor 武书彬李擘赵媛媛毛翠平
Owner SOUTH CHINA UNIV OF TECH
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