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Tech. for producing retention and drainage aid microgranule

A production process, retention and drainage technology, applied in the chemical industry, can solve problems such as inability to produce bentonite particles

Active Publication Date: 2007-12-19
ZHEJIANG RENHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are only a few reports on the application of bentonite particles in retention and drainage systems. There is no domestic enterprise producing similar products. The existing technology cannot produce bentonite particles suitable for papermaking production requirements.
In foreign countries, bentonite particle products have been used in the paper industry. Because of its excellent performance, it is widely accepted, and the annual consumption is more than tens of thousands of tons. Although there is no large-scale production in China, the laboratory demonstration and foreign products have been very good. Proved the application potential of bentonite particles, domestic paper manufacturers are no strangers to this product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] One ton of bentonite ore raw material, after chopping and ball milling, add 20 tons of water (bentonite content is 5%), fully wash and peel off the flakes, enter the cyclone, separate sand and stone impurities, and add 2 to 10 kg of hexadecimal to the slurry Sodium phosphate, fully mixed and reacted for 2 to 3 hours, until the cristobalite is completely eliminated in the slurry. Sedimentary materials such as sand and gravel are recycled as building materials. Add 20-100 kg of sodium carbonate or sodium bicarbonate to the soluble slurry in the cyclone, stir thoroughly for 1-2 hours for sodium treatment; The sol or sodium silicate is added to the pillared reactor, the reaction temperature is 50-70°C, the time is 2-3 hours, fully stirred and dispersed. The pillared slurry enters the evaporating pot for evaporation and concentration at 70-100°C until the appearance is sticky, and the material enters the dryer. Under the control of the program temperature controller, the te...

example 2

[0020] One ton of bentonite ore raw material, after chopping and ball milling, add 20 tons of water (bentonite content is 5%), fully wash and peel off the flakes, enter the cyclone, separate sand and stone impurities, add 2 to 10 kg of pyrophosphoric acid to the slurry Sodium, then fully mixed and reacted for 2 to 3 hours, until the cristobalite is completely eliminated in the slurry. Sedimentary materials such as sand and gravel are recycled as building materials. Add 20 to 100 kg of sodium fluoride to the soluble slurry in the cyclone, and stir it for 1 to 2 hours to sodiumize it. After concentration, the slurry enters a pillared reactor and uses 20 to 50 kg of silica sol or silicon Sodium acid is added to the pillared reactor, the reaction temperature is 50-70°C, the time is 2-3 hours, fully stirred and dispersed. The pillared slurry enters the evaporating pot for evaporation and concentration at 70-100°C until the appearance is sticky, and the material enters the dryer. U...

example 3

[0022] One ton of bentonite ore raw material, after chopping and ball milling, add 20 tons of water (bentonite content is 5%), fully wash and peel off the flakes, enter the cyclone, separate sand and stone impurities, add 2 to 10 kg of sodium pyrophosphate or hexadecimal Sodium phosphate, fully mixed and reacted for 2 to 3 hours, until the cristobalite is completely eliminated in the slurry. Sedimentary materials such as sand and gravel are recycled as building materials. Add 20 to 100 kg of sodium carbonate or sodium bicarbonate or sodium fluoride to the soluble slurry in the cyclone, stir well for 1 to 2 hours to modify it by sodium, and then concentrate the slurry into the pillared reactor. Add 20-50 kg of aluminum chloride or aluminum hydroxide into the pillared reactor, the reaction temperature is 50-60°C, the time is 2-3 hours, fully stirred and dispersed. The pillared slurry enters the evaporating pot for evaporation and concentration at 70-100°C until the appearance i...

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Abstract

The invention relates to a staying filtering assisting grain used bentonite as raw material manufacturing technique. It includes the following steps: chopping bentonite; ball milling; rotational flow separating after washing stripping; adding proper sodium salt to swirler; dissolving crystobalite to solubility silicon salt; column supporting silicon matter or aluminum salt; drying in stages. The technique is added sodium salt and parts of crystobalite to generate solubility silicic acid matter to remove the crystobalite fully, used silicon and aluminum as column agent, and adopted program temperature controlling drying technique to dry to ensure product quality. The product is fit for paper making demands of litter grain size and high ratio surface area staying filtering assisting, greatly improve bentonite mine yield to make the utilization of the bentonite resources reach the best.

Description

technical field [0001] The invention belongs to the field of chemical industry, and relates to a production process of auxiliary materials for papermaking technology, in particular to a production process of retention-aid particles with bentonite as the main component. Background technique [0002] In the early 1980s, microparticle retention technology was developed and utilized in papermaking. After being applied to the wet end of papermaking, through the synergistic effect between microparticles and polymers, it can improve the retention of fine components and increase the paper quality. Drainability, while sheet formation has also been improved. Compared with the traditional one-component or two-component polymer retention system, the microparticle retention system has obvious advantages. These particles help to form smaller, tighter and stronger flocs, and are strongly adsorbed on the ingredients. components, resulting in better retention and sheet formation. And in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/10D21H17/63
Inventor 童筠张有连
Owner ZHEJIANG RENHENG CHEM