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Method for improving adsorption capacity of adsorbent prepared from printing waste liquid extract

A technology of adsorption capacity and extract, which is applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of low adsorption capacity of adsorbent and large amount of adsorbent, so as to improve the utilization rate and porosity Uniformity, the effect of increasing the adsorption capacity

Pending Publication Date: 2019-01-04
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] If the adsorption capacity of the prepared adsorbent can be improved, the amount of adsorbent can be greatly reduced, the cost can be saved, the treatment effect can be improved, and the defects of low adsorption capacity and large amount of adsorbent in the adsorption and decolorization process of cationic dye dyeing wastewater can be overcome

Method used

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  • Method for improving adsorption capacity of adsorbent prepared from printing waste liquid extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Slowly add 98% concentrated sulfuric acid to the high-concentration water-based ink printing waste liquid, stir the reaction, reduce the solubility of the water-soluble polymer binder, and destroy its stability in water, so that the extractable substances in the waste liquid are just Condensed into insoluble fine solid particles;

[0029] (2) Stir continuously to reduce the viscosity of the waste liquid and prevent further flocculation of the generated fine solid particles. At the same time, slowly add 8 g / L sodium bicarbonate to the waste liquid to make it react with the waste liquid to generate micro-bubbles and make the bubbles Adhere to the fine solid particles in the waste liquid, and form a gas-liquid-solid three-phase contact interface between the fine solid particles;

[0030] (3) Stir continuously with the aid of 40 KHz ultrasonic waves, and at the same time heat to a temperature 5°C higher than the softening point of the binder, and gradually make the fine s...

Embodiment 2

[0037] (1) Slowly add 20% sodium bisulfate solution to the high-concentration water-based ink printing waste liquid, stir and react, reduce the solubility of the water-soluble polymer binder, and destroy its stability in water, so that it can be extracted from the waste liquid The substance just condenses into insoluble fine solid particles;

[0038] (2) Continue stirring to reduce the viscosity of the waste liquid and prevent further flocculation of the generated fine solid particles. At the same time, slowly add 5 g / L sodium carbonate to the waste liquid to make it react with the waste liquid to form tiny bubbles and make the bubbles adhere The fine solid particles in the waste liquid form a gas-liquid-solid three-phase contact interface between the fine solid particles;

[0039] (3) Stir continuously with the aid of 40 KHz ultrasonic waves, and at the same time heat to a temperature 20°C higher than the softening point of the binder, and gradually make the fine solid partic...

Embodiment 3

[0046] (1) Slowly add 98% glacial acetic acid to the high-concentration water-based ink printing waste liquid, stir the reaction, reduce the solubility of the water-soluble polymer binder, and destroy its stability in water, so that the extractable substances in the waste liquid are just right Condensed into insoluble fine solid particles;

[0047] (2) Continue stirring to reduce the viscosity of the waste liquid and prevent further flocculation of the generated fine solid particles. At the same time, slowly add 5 g / L potassium carbonate to the waste liquid to react with the waste liquid to form tiny bubbles, so that the bubbles adhere to the waste liquid The fine solid particles in the medium form a gas-liquid-solid three-phase contact interface between the fine solid particles;

[0048] (3) Stir continuously with the aid of 40 KHz ultrasonic waves and heat at the same time to a temperature 10°C above the softening point of the binder, gradually making the fine solid particle...

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Abstract

The invention discloses a method for improving adsorption capacity of an adsorbent prepared from printing waste liquid extract. The method includes steps: (1) adding chemical substances capable of releasing hydrogen ions into printing waste liquid, and performing stirring reaction; (2) feeding an appropriate quantity of a chemical agent for generating tiny bubbles through reaction with the waste liquid; (3) continuing ultrasonic-assisted stirring and heating until the temperature is 0-20 DEG C higher than a softening point of a connection material; (4) stopping stirring, only keeping ultrasonic treatment, and keeping the temperature for a period of time; (5) after a block extract is completely contracted in volume, performing solid-liquid separation, and removing water; (6) adding saturated potassium hydroxide solution, and stopping ultrasonic treatment after the block extract completely absorbs potassium hydroxide; (7) taking out the block extract, cooling, crushing, and drying at a low temperature; (8) performing further carbonizing and activating for 1-4h under nitrogen protection, and crushing to obtain the adsorbent. By adoption of the method, adsorption capacity of the adsorbent prepared from the extract is improved, and the cationic dye adsorption capacity reaches 460mg / g or above.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for increasing the adsorption capacity of an adsorbent prepared from printing waste liquid extract. Background technique [0002] Ink is composed of pigments, binders, fillers, additives, etc., and can be divided into oil-based inks and water-based inks. Oil-based ink contains a large amount of organic solvents, which is seriously polluted and gradually eliminated. Water-based ink is mainly composed of binders, namely water-soluble polymer organic matter, pigments, alcohols, amines or ammonia, and other additives and water. Water-based ink is widely used in various fields because of its health, environmental protection and safety characteristics. At present, a large number of plastic packaging materials are increasingly using water-based inks in printing and printing. When changing colors, printing equipment and water-based ink storage tank...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F9/10C02F101/30
CPCB01J20/20B01J2220/4875C02F1/02C02F1/24C02F1/283C02F9/00C02F2101/308C02F2301/08
Inventor 柳荣展张克瑞潘颖张宾石宝龙
Owner QINGDAO UNIV
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