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Production method of superfine modified ground calcium carbonate by wet grinding

A technology of heavy calcium carbonate and wet grinding, applied in chemical instruments and methods, calcium/strontium/barium compounds, inorganic pigment treatment, etc., can solve problems affecting product application performance, complex production process, high production cost, etc., to achieve Low production cost, simple production process, and improved dispersion performance

Active Publication Date: 2013-03-20
东南新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dry production method is generally used for modified ground calcium carbonate products, that is, the surface activation treatment is performed on the ground calcium carbonate and the surface modifier at a certain temperature under a certain ratio. This production method is suitable for coarse particle size. However, for the production of ultra-fine modified heavy calcium carbonate, the production process of this method is complicated, the production cost is high, and the product is prone to secondary agglomeration and poor dispersion, which affects the application performance of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A production method of wet grinding superfine modified ground calcium carbonate, comprising the following steps:

[0017] (1) Preparation of heavy calcium carbonate slurry

[0018] In parts by weight, 100 parts of heavy calcium carbonate coarse material with a diameter of ≤38 microns, 50 parts of water, and 2 parts of sodium polyacrylate were mixed and stirred evenly to obtain a heavy calcium carbonate slurry;

[0019] (2) Preparation of water-soluble surface modifier

[0020] It is prepared according to the following steps: ①In parts by weight, mix and stir 17 parts of aluminum stearate and 100 parts of white oil evenly, and heat to 90-100°C to prepare A mixture; ②Add 6 parts of caustic soda to 1000 parts Stir in water until completely dissolved, then heat to 50-60°C, then add 55 parts of stearic acid, continue to stir, heat to 90-100°C, and keep warm for 15 minutes to obtain mixture B; ① 3 parts of mixture A prepared in step ②, 75 parts of mixture B prepared in step...

Embodiment 2

[0024] A production method of wet grinding superfine modified ground calcium carbonate, comprising the following steps:

[0025] (1) Preparation of heavy calcium carbonate slurry

[0026] In parts by weight, 100 parts of heavy calcium carbonate coarse material with a diameter of ≤38 microns, 100 parts of water, and 2 parts of sodium hexametaphosphate were mixed and stirred evenly to obtain a heavy calcium carbonate slurry;

[0027] (2) Preparation of water-soluble surface modifier

[0028] It is prepared according to the following steps: ①According to parts by weight, mix and stir 20 parts of aluminum stearate and 100 parts of white oil evenly, and heat to 90-100 ℃ to prepare A mixture; ②Add 9 parts of caustic soda to 1000 parts Stir in water until completely dissolved, then heat to 50-60°C, then add 65 parts of stearic acid, continue to stir, heat to 90-100°C, and keep warm for 20 minutes to obtain mixture B; ① 3 parts of mixture A prepared in step ②, 75 parts of mixture B ...

Embodiment 3

[0032] A production method of wet grinding superfine modified ground calcium carbonate, comprising the following steps:

[0033] (1) Preparation of heavy calcium carbonate slurry

[0034] In parts by weight, 100 parts of heavy calcium carbonate coarse material with a diameter of ≤38 microns, 75 parts of water, and 1.5 parts of sodium hexametaphosphate were mixed and stirred evenly to obtain a heavy calcium carbonate slurry;

[0035] (2) Preparation of water-soluble surface modifier

[0036] ①In parts by weight, mix and stir 18.5 parts of aluminum stearate and 100 parts of white oil evenly, and heat to 90-100°C to obtain mixture A; ②Add 6-9 parts of caustic soda to 1000 parts of water, and stir until Dissolve completely, then heat to 50-60°C, then add 60 parts of stearic acid, continue to stir, heat to 90-100°C, and keep warm for 15-20 minutes to obtain mixture B; 3 parts of the obtained A mixture, 75 parts of the B mixture prepared in step ②, 22 parts of calcium stearate, an...

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Abstract

The invention provides a production method of superfine modified ground calcium carbonate by wet grinding, comprising the following steps: (1) preparing ground calcium carbonate slurry; (2) preparing water-soluble surface modifier; (3) preparing the superfine modified ground calcium carbonate. In the production method, excellent water-soluble surface modifier is added in the water-soluble surface modifier, and the wet grinding method is used for producing the superfine modified ground calcium carbonate, thus, the affinity of the ground calcium carbonate particles to the organic superpolymer is enhanced, the dispersing performance of the ground calcium carbonate in the superpolymer is improved, and the prepared superfine modified ground calcium carbonate is excellent in affinity to the superpolymer, high in dispersing performance in the superpolymer and excellent in compatibility to the superpolymer and the auxiliary materials. By taking the superfine modified ground calcium carbonate produced by the production method as filler, the filling volume of the ground calcium carbonate in the products can be increased, and the performance of the products can be improved.

Description

technical field [0001] The invention relates to the technical field of production of modified heavy calcium carbonate, in particular to a production method of wet grinding ultrafine modified heavy calcium carbonate. Background technique [0002] Heavy calcium carbonate is also referred to as "heavy calcium", usually used as a filler, widely used in rubber, plastics, paper, coatings, inks, cables, construction supplies, food, medicine, textiles and other industries, as a filler to increase product quality. volume, reducing production costs. The production of heavy calcium carbonate is divided into two methods: dry method and wet method. Due to the limitation of grinding and classification technology, the fineness of the product produced by dry method is difficult to be ultra-fine. Existing superfine heavy calcium carbonate is usually produced by wet method, that is, calcite is first ground into a powder of a certain fineness, and then it is obtained by adding a certain amoun...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/10C09C3/08C09C3/06C09C3/04
CPCC01F11/185C01P2004/61C09C1/021C09C1/02C09C3/04
Inventor 巫锡海
Owner 东南新材料股份有限公司
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