Maria Harja, Ramona Carla Ciocinta,  IGOR CRETESCU, Maria APOSTOLESCU, MARINELA Barbuta<br>Crystal Growth of Calcium Carbonate with Various<br>Morphologies from Residual Calcium Chloride Solution

Maria Harja, Ramona Carla Ciocinta, IGOR CRETESCU, Maria APOSTOLESCU, MARINELA Barbuta
Crystal Growth of Calcium Carbonate with Various
Morphologies from Residual Calcium Chloride Solution

Abstract:

It is known that chemical industry is not the principal pollution, but with all that its public image is still unfavorable. For changing the wrong image about chemical industry it is necessary to present the real possibilities of this domain in the problems of environment protection. To this purpose the present paper wants to serve, because it proposes the obtaining of calcium carbonate, which is used in different industries, on the base of inorganic industry of high tonnage (the industry of soda ash). In this case, the paper analyzes the influence of some parameters on the morphology and granulometric of calcium carbonate. The morphology of the calcium carbonate particles was characterized with scanning electronic microscopy (SEM). The size of particles was obtained by laser analyses. Results of research have shown that the production of ultrafine calcium carbonate based on residual solution from soda ash is possible. The shape of particles depends on the ratio of reactants, revolution influencing their dimension. The new products achieve the standards necessary for filler of rubber, paint and pigment industries. The additional advantage of the described methods is not only obtaining ultrafine calcium carbonate precipitation, but also reducing waste dangerous for the natural environment. Soda ash factories may also benefit from the introduction of the technology (sale of ultrafine calcium carbonate, release from environment pollution fees). Keywords: waste, capitalization, calcium carbonate, morphology, particle size

Issue: 2009, Volume 60, Issue 10

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