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Method for preparing vaterite phase containing calcium carbonate by adopting sodium sulfonate as crystal form control agent

A crystal form control agent, vaterite technology, applied in the direction of calcium carbonate/strontium/barium, etc., can solve problems such as unseen, and achieve the effects of large output, environmental friendliness and low cost

Inactive Publication Date: 2018-11-13
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the mechanochemical preparation of calcium carbonate powder, there is no relevant literature report

Method used

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  • Method for preparing vaterite phase containing calcium carbonate by adopting sodium sulfonate as crystal form control agent
  • Method for preparing vaterite phase containing calcium carbonate by adopting sodium sulfonate as crystal form control agent
  • Method for preparing vaterite phase containing calcium carbonate by adopting sodium sulfonate as crystal form control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of method that sodium sulfonate is crystal form controlling agent to prepare calcium carbonate containing vaterite phase, the preparation method comprises the steps:

[0027] (1) Weigh calcium chloride and sodium carbonate powder at a molar ratio of 1:1, take sodium dodecylsulfonate powder with a total mass of 0.5% of calcium chloride and sodium carbonate powder and 30 g of grinding balls, and make the ball Mass ratio 20:1;

[0028] (2) Add the mixture in step (1) into the ball mill tank, set the ball mill speed to 250 rpm, ball mill time to 60 minutes, and start the ball mill;

[0029] (3) After the reaction time is over, take out the ball mill jar, scrape off the white powder, put it in a clean centrifuge tube, stir, and centrifuge (10000 rpm, 3 min), pour off the supernatant, and wash with ethanol and water Washed twice respectively, placed in an electric constant temperature blast drying oven to dry for 6 hours, and finally collected the powder and stored it...

Embodiment 2

[0032] A kind of method that sodium sulfonate is crystal form controlling agent to prepare calcium carbonate containing vaterite phase, the preparation method comprises the steps:

[0033] (1) Weigh calcium chloride and sodium carbonate powder at a molar ratio of 1:1, take sodium dodecylsulfonate powder with 10% of the total mass of calcium chloride and sodium carbonate powder and 30 g of grinding balls, so that the ball Mass ratio 20:1;

[0034] (2) Add the mixture in step (1) into the ball mill tank, set the ball mill speed to 250 rpm, ball mill time to 60 minutes, and start the ball mill;

[0035] (3) After the reaction time is over, take out the ball mill jar, scrape off the white powder, put it in a clean centrifuge tube, stir, and centrifuge (10000 rpm, 3 min), pour off the supernatant, and wash with ethanol and water Washed twice respectively, placed in an electric constant temperature blast drying oven to dry for 6 hours, and finally collected the powder and stored it...

Embodiment 3

[0038] A kind of method that sodium sulfonate is crystal form controlling agent to prepare calcium carbonate containing vaterite phase, the preparation method comprises the steps:

[0039] (1) Weigh calcium chloride and sodium carbonate powder at a molar ratio of 1:1, take sodium dodecylsulfonate powder with a total mass of 35% of calcium chloride and sodium carbonate powder and 30 g of grinding balls, so that the ball Mass ratio 20:1;

[0040] (2) Add the mixture in step (1) into the ball mill tank, set the ball mill speed to 250 rpm, ball mill time to 60 minutes, and start the ball mill;

[0041] (3) After the reaction time is over, take out the ball mill jar, scrape off the white powder, put it in a clean centrifuge tube, stir, and centrifuge (10000 rpm, 3 min), pour off the supernatant, and wash with ethanol and water Washed twice respectively, placed in an electric constant temperature blast drying oven to dry for 6 hours, and finally collected the powder and stored it i...

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Abstract

The invention provides a method for preparing vaterite phase containing calcium carbonate by adopting sodium sulfonate as a crystal form control agent. The method includes the following steps: 1, weighing raw materials and an additive; 2, performing mechanical milling to raw materials and the additive; 3, removing raw materials calcium chloride and sodium carbonate not fully reacted and a by-product sodium chloride, and drying a product; 4, performing phase analysis to the product to obtain the product vaterite phase containing calcium carbonate powder. According to the method, the content ofthe vaterite phase containing calcium carbonate inside the product can be changed through adjusting experimental parameters, during the ball milling experiment, along with the increase of the additionamount of sodium dodecyl sulfate from 0.5 wt% to 70wt%, the content of vaterite is increased from 1.2% to 58.2%; in the method, as the mechanical milling is adopted, requirements on equipment and cost are low, no harmful toxic matters are generated during preparation, the preparation process is green and environmentally friendly, the technology is mature, the conditions are continuous and controllable, and the method is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to the preparation of calcite-type and vaterite-type calcium carbonate, in particular to a method for preparing vaterite-containing calcium carbonate powder by using a mechanochemical method and using sodium sulfonate as a crystal form control agent. Background technique [0002] Calcite, aragonite, and vaterite are three anhydrous forms of calcium carbonate that gradually decrease in thermodynamic stability. As the most thermodynamically unstable vaterite, it has more extensive and special uses than calcite and aragonite. Traditional research is based on the unique qualities of vaterite, such as large specific surface area, spherical distribution, good dispersion and birefringence, which can significantly improve the filling performance of inks, plastics, paper, coatings, etc. and the coating properties of paper, and improve the gloss of products. Flow, physics and printability. The latest research in biomedicine and pharmacy s...

Claims

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Application Information

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IPC IPC(8): C01F11/18
CPCC01F11/18C01P2002/72C01P2004/03C01P2004/30C01P2004/32
Inventor 蒋久信胡元聪胡成沛魏李庚褚磊磊孔琦陈传杰吴月
Owner HUBEI UNIV OF TECH
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