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Plate-like light calcium carbonate and preparation technology thereof

A light calcium carbonate, preparation technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve the problems of high impurity content in products, unacceptable by customers, high cost, etc., achieve good rheological properties, improve ink absorption performance, increase Great smoothness and gloss effects

Inactive Publication Date: 2008-07-09
上海耀华纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are two kinds of platy calcium carbonate production: one is obtained by the reaction of calcium salt and carbonate, and its disadvantage is high cost, which is difficult for customers to accept; the other is obtained by bubbling carbonization method, in which Collagen, β-butanin and other macromolecular organic substances are used as crystal form control agents, and their disadvantages are high impurity content and poor whiteness of the product

Method used

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  • Plate-like light calcium carbonate and preparation technology thereof
  • Plate-like light calcium carbonate and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 5000 grams of lime into a 10L bucket, heat water for digestion, and sieve with a 200-mesh sieve after 1 hour, adjust the concentration of the sieved slurry to 11%, and take Ca(OH) with a solid content of 11%. 2 2000 grams of slurry, put the slurry into a 5L reaction kettle (with jacket), start the agitator on the reaction kettle, turn on the cooling water switch of the reaction kettle, adjust the temperature of the slurry to 40 degrees, turn on the flow switch of carbon dioxide, and adjust the carbon dioxide The concentration of carbon dioxide is 30%, the temperature of carbon dioxide is about 20 degrees, the flow rate of carbon dioxide is adjusted to 10L / min, carbonization starts, and the crystal form control agent is added according to 2% of the solid content of calcium carbonate 30 minutes before the end of carbonization. Carbonize for 10 minutes, and then continue to stir for 3 hours, so that the plate-shaped particles are fully developed, the particle size is un...

Embodiment 2

[0019] Get 5000 grams of lime and put it into a 10L barrel, heat water for digestion, sieve it with a 200-mesh sieve after 1 hour, adjust the concentration of the slurry after the sieve to 8%, and take Ca(OH) with a solid content of 8%. 2 2500 grams of slurry, put the slurry into a 5L reaction kettle (with jacket), start the agitator on the reaction kettle, turn on the cooling water switch of the reaction kettle, reduce the temperature of the slurry to 25 degrees, open the flow switch of carbon dioxide, and adjust the carbon dioxide The concentration of carbon dioxide is 30%, the temperature of carbon dioxide is about 20 degrees, the flow rate of carbon dioxide is adjusted to 15L / min, carbonization starts, and the crystal form control agent is added according to 1% of the solid content of calcium carbonate 10 minutes before the end of carbonization. Carbonize for 10 minutes, and then continue to stir for 3 hours, so that the plate-shaped particles are fully developed, the parti...

Embodiment 3

[0021] Get 5000 grams of lime and put it into a 10L bucket, heat water for digestion, sieve with a 200-mesh sieve after 0.5 hours, adjust the concentration of the slurry after sieving to 12%, and take Ca(OH) with a solid content of 12%. 2 2000 grams of slurry, put the slurry into a 5L reaction kettle (with jacket), start the agitator on the reaction kettle, turn on the cooling water switch of the reaction kettle, reduce the temperature of the slurry to 25 degrees, open the flow switch of carbon dioxide, and adjust the carbon dioxide The concentration of carbon dioxide is 30%, the temperature of carbon dioxide is about 20 degrees, the flow rate of carbon dioxide is adjusted to 20L / min, and carbonization starts. When the carbonization is completed, the crystal form control agent is added at 5% of the solid content of calcium carbonate. Carbonize for 10 minutes, and then continue to stir for 3 hours, so that the plate-shaped particles are fully developed, the particle size is unif...

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Abstract

The invention discloses a board-shaped light-weight calcium carbonate and preparing method with grain size at 1-2u and the ratio of breadth and thickness at 5:1-10:1, which comprises the following steps: slaking lime; carbonizing; controlling crystal type; dehydrating; drying; sieving to obtain the product.

Description

technical field [0001] The invention relates to a calcium carbonate and a preparation process thereof, in particular to a plate-shaped light calcium carbonate and a preparation process thereof. Background technique [0002] At present, there are two kinds of platy calcium carbonate production: one is obtained by the reaction of calcium salt and carbonate, and its disadvantage is high cost, which is difficult for customers to accept; the other is obtained by bubbling carbonization method, and the Collagen, β-butanin and other macromolecular organic substances are used as crystal form control agents, but the disadvantages are that the product has a high impurity content and the whiteness of the product is not good. Adopting the bubbling carbonization method and selecting inorganic substances as the crystal form control agent, the cost of the product is lower, the impurity content is less, and the whiteness is higher. Contents of the invention [0003] The object of the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18
Inventor 易登峰颜培刚张华雷霆顾杰
Owner 上海耀华纳米科技有限公司