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Double surface modification method of heavy calcium carbonate

A heavy calcium carbonate, surface modification technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc. Cost increase and other issues, to achieve the effect of simple process flow, easy industrial production, and improved production efficiency

Inactive Publication Date: 2019-03-05
贵州紫云月华新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventive method adopts two process steps of dry process and wet process respectively for modification, the process flow is complicated, it is not conducive to industrial production and implementation, and the production cost is greatly increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the mass ratio of heavy calcium carbonate: water: phthalic acid = 1:1:0.01, weigh 500kg of heavy calcium carbonate, 500kg of water and 5kg of phthalic acid respectively, and stir for 30min at a stirring speed of 400r / min at 25°C , after mixing evenly, the first modified product was obtained; then weighed 2kg chitosan, 0.4kg glacial acetic acid, 7.6kg water respectively, stirred at 60°C for 2h at a stirring speed of 300r / min, and mixed them uniformly to obtain A modifier with a mass fraction of 20%; according to the mass ratio modifier: the first modified product = 1:100, the prepared modifier was added to the first modified product, and at 70°C at 500r / min Stir at a stirring speed for 1 hour to fully mix the two to obtain a double modified product; the finally obtained double modified product is dried, ground and sieved to finally obtain a double modified product.

Embodiment 2

[0023] According to the mass ratio of heavy calcium carbonate: water: phthalic acid = 1:0.5:0.02, weigh 500kg of heavy calcium carbonate, 250kg of water and 10kg of phthalic acid, and stir at 40°C for 30min at a stirring speed of 400r / min , after mixing evenly, the first modified product was obtained; then weigh 2kg chitosan, 0.4kg glacial acetic acid, and 7.6kg water respectively, stir at 60°C for 2h at a stirring speed of 400r / min, and mix the three evenly to obtain A modifier with a mass fraction of 20%; according to the mass ratio modifier: the first modified product = 1:100, the prepared modifier was added to the first modified product, and at 70°C at 500r / min Stirring at a stirring speed for 1.5 hours, so that the two are fully mixed and evenly obtained to obtain a double modified product; the finally obtained double modified product is dried, ground and sieved to finally obtain a double modified product.

Embodiment 3

[0025] According to the mass ratio of heavy calcium carbonate: water: phthalic acid = 1:1.5:0.03, weigh 500kg of heavy calcium carbonate, 750kg of water and 15kg of phthalic acid, and stir for 30min at 30°C at a stirring speed of 400r / min After mixing evenly, the first modified product was obtained; then weighed 2kg chitin, 0.4kg glacial acetic acid, and 7.6kg water respectively, and stirred at 650°C for 2h at a stirring speed of 400r / min, and the mass was obtained after the three were mixed evenly. Modifier with a fraction of 20%; according to the mass ratio of modifier: first modified product = 1:100, add the prepared modifier to the first modified product, and stir at 500r / min at 70°C Stir at a high speed for 1 hour to fully mix the two to obtain a double-modified product; the finally obtained double-modified product is dried, ground, and sieved to finally obtain a double-modified product.

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Abstract

The invention belongs to the field of calcium carbonate powder deep processing, and concretely relates to a double surface modification method of heavy calcium carbonate. The method includes the following process steps: (1) evenly mixing heavy calcium carbonate, water and low molecular organic matters according to a ratio of calcium carbonate: water: low molecular organic matter = 1:0.5-1.5:0.01-0.05 by mass to prepare a first modified product; (2) dispersing high molecular polymers in a solvent and stirring and dissolving at a certain temperature to obtain a uniform modifier having a mass fraction of 20-40%; (3) adding the modifier prepared in the step (2) into the first modified product of the step (1) according to a mass ratio of modifier: first modified product=1:100-120, and evenly mixing the modifier and the first modified product by stirring to obtain a double modified product; and (4) drying, grinding, sieving the double modified product obtain by the step (3) to finally prepare a double modified product. The double surface modification method of heavy calcium carbonate is simple in process flow and easy in industrialized production, and can effectively improve the modification effect and production efficiency.

Description

technical field [0001] The invention belongs to the field of deep processing of calcium carbonate powder, and in particular relates to a method for double surface modification of heavy calcium carbonate. Background technique [0002] Heavy calcium carbonate is made of natural calcite, marble, dolomite or chalk, etc. After being ground and classified by mechanical equipment, it becomes a heavy calcium powder product after reaching a certain fineness. With the increasing demand, the refinement and functional development of heavy calcium carbonate products are urgent and inevitable. Compared with developed countries, the application of heavy calcium carbonate in my country is still mainly primary products, and the real application of heavy calcium carbonate The value lies in the deep processing products, that is, ultra-fine, high-purity, surface-modified products. Among them, the added value of ground calcium carbonate can be greatly improved by surface modification of ground c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18
CPCC01F11/185
Inventor 李仕阳潘健龙柱林蒋春元
Owner 贵州紫云月华新材料有限公司
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