Share This Article:

Research on Dihydrate Calcium Sulphate Crystallization during the Production of Phosphoric Acid by Wet Process

Abstract Full-Text HTML XML Download Download as PDF (Size:3313KB) PP. 7-11
DOI: 10.4236/msce.2014.212002    2,836 Downloads   3,259 Views   Citations
Author(s)    Leave a comment

ABSTRACT

Simulate the production of phosphoric acid by wet process is conducted in batch experiments facilities by adopting phosphorus concentrate as raw material from Wengfu, Dazhou city, with a view to study sulfuric acid concentration, reaction time, crystallization temperature of calcium sulfate, active additive, the influence of seed crystal on the size and shape of calcium sulfate crystal under conditions of Wet process phosphoric acid productive process. The research results show that under the conditions of the liquid-solid ratio of 4:1, the sulfate acid stoichiometric ratio of 1.1, phosphoric acid mass fraction of 21%, the crystallization temperature of 75°C, crystallization time of 120 min, when (NH4)2SO4 taken as active additives, Mg-doped calcium sulphate crystal as crystal seed can obtain rodlike crystallization of stability, thickness, uniformity.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Du, H. , Chen, A. and Yang, L. (2014) Research on Dihydrate Calcium Sulphate Crystallization during the Production of Phosphoric Acid by Wet Process. Journal of Materials Science and Chemical Engineering, 2, 7-11. doi: 10.4236/msce.2014.212002.

References

[1] Anirudhan, T.S. and Ramachandran, M. (2006) Adsorptive Removal of Tannin from Aqueous Solutions by Cationic Surfactant-Modifled Bentonite Clay. Journal of Colloid and Interface Science, 299, 116-124. http://dx.doi.org/10.1016/j.jcis.2006.01.056
[2] Jaw, K.-S., et al. (2001) The Thermal Decomposition Behaviors of Satiric Acid, Paraffin Wax and Poly-Vinyl Butyric. Thermochimica Acta, 367, 165-168.
[3] Shindo, H., et al. (2008) Stability of Surface Atomic Structures of Ionic Crystals Studied by Atomic Force Microscopy Observation of Various Faces CaSO4 Crystal in Solution. JVST B, 14, 1365-1368.
[4] Follner, S., et al. (2012) The Setting Behaviour of α- and β-CaSO4·0.5H2O as a Function of Crystal, Structure and Morphology. Crystal Research and Technology, 37, 1075-1087.
http://dx.doi.org/10.1002/1521-4079(200210)37:10<1075::AID-CRAT1075>3.0.CO;2-X
[5] Boeyens, J.C.A. and Ichharam, V.V.H. (2002) Redetermination of the Crystal Structure of Calcium Sulfate Dehydrate. Zeitschrift fur Kristallographie, 217, 9-11.

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.