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A fluid-aid filter aid

A technology of retention and drainage aid, bentonite, applied in the direction of inorganic chemistry, non-metallic elements, silicon compounds, etc., can solve the problems of loss of fine fibers and fillers, loss of papermaking costs, etc., to achieve high-efficiency loss, stable paper machine operation, reduce The effect of emissions

Active Publication Date: 2008-04-09
ZHEJIANG RENHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies have only reduced the loss of fine fibers and fillers to wastewater to a certain extent, and the amount of fine fibers and fillers lost to wastewater cannot be ignored.
Under normal circumstances, the fine fibers flowing away with white water account for more than 2% of the total amount of papermaking raw materials, which brings great losses to the cost of papermaking, and these lost fine substances have brought great pressure to the environment

Method used

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  • A fluid-aid filter aid
  • A fluid-aid filter aid

Examples

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Embodiment 1

[0017] The retention and drainage aid of this example is a kind of powdery substance as follows: after bentonite is pulverized, sodiumized, and pillared, the components by weight are: montmorillonite 84~85, sodium hexametaphosphate 0.18~ 0.2, sodium carbonate 4.8~5., silica sol 5~5.2, aluminum hydroxide 2~2.2, and the balance is water.

Embodiment 2

[0019] The retention and drainage aid of this example is a kind of powdered substance as follows: the components by weight after bentonite is pulverized, sodiumized, and pillared are: montmorillonite 85, sodium hexametaphosphate 0.2, sodium carbonate 5. Silica sol 5, aluminum hydroxide 2, and the balance is water. The product is named BT.

Embodiment 3

[0021] The retention and drainage aid of this example is a kind of powdered substance as follows: the components by weight after bentonite is pulverized, sodiumized, and pillared are: montmorillonite 86, sodium hexametaphosphate 0.22, sodium carbonate 5.2, silica sol 4.8, aluminum hydroxide 1.8, and the balance is water.

[0022] After analysis and determination, the more specific chemical compositions of the above three products are as follows:

[0023] SiO 2 : 60-70%

[0024] al 2 o 3 : 10-15%

[0025] CaO 2 : 2-5%

[0026] MgO 2 : 1-3%

[0027] Na 2 O: 3-7%

[0028] K 2 O: 1-2%

[0029] Fe 2 o 3 : 1-2%

[0030] Moisture: 6-12%

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Abstract

The invention discloses retention and filtration aid and the application thereof, belongs to the chemical engineering technical field, and relates to a montmorillonite product and the application thereof in the paper making industry. The retention and filtration aid is a powdery substance as follows: bentonite after crushing, sodium treatment and pillared processing has the following components by weight: the montmorillonite is 84 to 86 percent, sodium hexametaphosphate is 0.18 to 0.22 percent, sodium carbonate is 4.8 to 5.2 percent, silica sol is 4.8 to 5.2 percent, aluminium hydroxide is 1.8 to 2.2 percent, and the rest is water. The retention and filtration aid provided by the invention belongs to bentonite unit double corpuscle paper making retention and filtration aid. The invention can well resolve the problem of the drain of fiber fines and loading material in the paper making industry, in particular to the drain of the fiber fines and the loading material in the waste paper reclamation pulping process. The production cost can be evidently reduced, and the organic substance discharging in the waste water is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a montmorillonite product and its application, in particular to a retention and drainage aid capable of retaining fine substances and its application in the papermaking industry. Background technique [0002] The long-term application experience of paper mills shows that the current first-pass retention rate of paper machines is generally only about 80%, and the first-pass retention rate of some low-grade paper machines is even lower. Substances that do not remain on the paper and become products are mostly fine fibers and fillers. These fine fibers and fillers are lost to the papermaking wastewater and discharged along with the wastewater. This will mainly cause two impacts: on the one hand, the loss of fine fibers and fillers causes waste of papermaking raw materials and increases production costs; on the other hand, the lost substances are discharged into the environme...

Claims

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Application Information

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IPC IPC(8): B01J20/10
Inventor 童筠张有连
Owner ZHEJIANG RENHENG CHEM
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