SHORT COMMUNICATION

Preparation of ultra-fine calcium carbonate by a solvent-free reaction using supersonic airflow and low temperatures

Yan-Hua Cai^{I, *}; Dong-Mei Ma^II; Ru-Fang Peng^I; Shi-Jin Chu^I

^ISchool of Material Science and Engineering, Southwest University of Science and Technology, Mianyan, Sichuan 621010, People's Republic of China
^IISchool of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, People's Republic of China

ABSTRACT

The treatment of calcium chloride with sodium carbonate under solvent-free conditions with a supersonic airflow and at a low heating temperature leads to the synthesis of ultra-fine calcium carbonate. The reaction not only involves mild conditions, a simple operation, and high yields but also gives a high conversion rate.

Keywords: Supersonic airflow, solvent-free reaction, low temperature, calcium carbonate

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Acknowledgements

The authors are very appreciative of financial support received from the Science and Technology Bureau of Sichuan Province (2006Z02-025).

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Received 6 August 2007
Revised 19 September 2008
Accepted 9 October 2008

* To whom correspondence should be addressed. E-mail: caiyh651@yahoo.com.cn