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Preparation method of modified attapulgite particle retention and filtration aid

A particle retention and attapulgite technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of paper evenness and strength decline, paper material drainage difficulties, fiber and filler retention deterioration, etc.

Inactive Publication Date: 2010-05-26
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This series of major changes has made the wet end environment of papermaking more and more complicated. A large number of dissolved and colloidal substances and fine fibers make it difficult to filter water from paper materials. High shear force makes the retention of fibers and fillers worse. Traditional The flocculation produced by the retention and drainage system leads to a decrease in the evenness and strength of the paper sheet, an increase in the loss of fibers in white water, a serious accumulation of garbage components, and poor runnability of the paper machine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] The attapulgite is used as a raw material, dried at 80°C, crushed and ball milled, and sieved to obtain a powder. Weigh a certain amount of powder in the reactor, add water to make the concentration reach 15%. Add 15% sodium hexametaphosphate, and stir mechanically for 30 minutes. The reactant was subjected to ultrasonic treatment for 30 minutes, left to stand for 15 minutes, and the supernatant suspension was poured out. The product was centrifuged at 2000 rpm for 15 min with a centrifuge, and the supernatant was discarded. Put the product into an oven at 80°C for drying, and the dried product is cooled at room temperature for later use. The purified sample was weighed, and the prepared 2 mol / liter sulfuric acid solution was added to make the attapulgite concentration reach 10%. The reaction was carried out at 70° C. for 4 hours while stirring. After the reaction, the reactant was centrifuged with a centrifuge, the supernatant was discarded, diluted with water, and...

example 2

[0019] The attapulgite is used as a raw material, dried at 80°C, crushed and ball milled, and sieved to obtain a powder. Weigh a certain amount of powder in the reactor, add water to make the concentration reach 15%. Add 10% sodium pyrophosphate, and stir mechanically for 50 minutes. The reactant was ultrasonically treated for 40 minutes, left to stand for 20 minutes, and the supernatant suspension was poured out. The product was centrifuged at 1500 rpm for 20 min with a centrifuge, and the supernatant was discarded. Put the product into an oven at 80°C for drying, and the dried product is cooled at room temperature for later use. The purified sample was weighed, and the prepared 1 mol / liter hydrochloric acid solution was added to make the attapulgite concentration reach 10%. The reaction was carried out at 80° C. for 2 hours while stirring. After the reaction, the reactant was centrifuged with a centrifuge, the supernatant was discarded, diluted with water, and the centri...

example 3

[0022] The attapulgite is used as a raw material, dried at 80°C, crushed and ball milled, and sieved to obtain a powder. Weigh a certain amount of powder in the reactor, add water to make the concentration reach 15%. Add 15% sodium tripolyphosphate, and stir mechanically for 30 minutes. The reactant was ultrasonically treated for 30 minutes, left to stand for 20 minutes, and the supernatant suspension was poured out. The product was centrifuged at 2000 rpm for 20 min with a centrifuge, and the supernatant was discarded. Put the product into an oven at 80°C for drying, and the dried product is cooled at room temperature for later use. The purified sample was weighed, and the prepared 4 mol / liter hydrochloric acid solution was added to make the attapulgite concentration reach 10%. The reaction was carried out at 70° C. for 1 hour while stirring. After the reaction, the reactant was centrifuged with a centrifuge, the supernatant was discarded, diluted with water, and the cent...

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PUM

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Abstract

The invention relates to a preparation method of a particle retention and filtration aid using attapulgite as a raw material. The preparation method comprises the following steps of: (1) using the attapulgite as the raw material, drying, pulverizing, ball grinding and sieving to obtain powder; (2) purifying through mechanical stirring, ultrasonic treatment and centrifugal treatment by adding a dispersing agent; and (3) carrying out acid modification and microwave modification. A product of the method is a powdered particle product which is used as a particle retention and filtration aid and applied to the paper industry. The attapulgite purifying and modifying production process can realize continuous production, and the product has good dispersing property. Acid activation and microwave activation are combined, and the synergy greatly improves the activity of the product. By applying the preparation method, the attapulgite can be used as a raw material to produce high added-value products.

Description

technical field [0001] The invention relates to the technical field of papermaking auxiliary production, in particular to a method for preparing a modified attapulgite particle retention and drainage aid which is applied in the field of papermaking industry. Background technique [0002] The modern paper industry is facing the urgent requirement of water retention and water filtration technology advancement. The formation of this focus is related to the resource and environmental pressure faced by the paper industry. In order to reduce the consumption of natural plant resources, people have increased the amount of mineral fillers and secondary fibers; in order to reduce environmental pollution, the degree of closed circulation of white water has been increased; at the same time, paper machines are moving towards high-speed, large-scale and medium-alkaline papermaking direction of development. This series of major changes has made the wet end environment of papermaking more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30
Inventor 胡芳祖彬
Owner QIQIHAR UNIVERSITY
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