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Simultaneous Precipitation And Purification Of Stearic Acid Using Gas Anti Solvent Process

Yap, Min Yee, and Masitah Hasan, (2006) Simultaneous Precipitation And Purification Of Stearic Acid Using Gas Anti Solvent Process. Engineering e-Transaction, 1 (1). pp. 1-6. ISSN 1823-6379

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Official URL: http://ejum.fsktm.um.edu.my/ArticleInformation.aspx?ArticleID=343

Affiliations

University of Malaya. Faculty of Engineering. Dept. of Chemical Engineering

Abstract

Stearic acid particles were prepared using carbon dioxide in the Gas Anti Solvent (GAS) process where dense carbon dioxide (CO2) was injected into the organic solution containing stearic acid to create supersaturation of the solution and therefore precipitation of stearic acid. The precipitation results show that the particle size was reduced from original 3 mm to 4 mm to about 100 μm using this process. The precipitation results of stearic acid prepared using Gas Anti Solvent process were also compared with stearic acid particles prepared using conventional method. The results show that the particles prepared using this process was much finer than the particles prepared using the conventional method. Besides being able to retain the original crystalline structure, stearic acid particles prepared using this process were also almost solvent-free which is in contrast with stearic acid particles prepared with conventional method where much residual solvents were still retained. The overall results indicate that the Gas Anti Solvent process is a feasible alternative method to produce desired particle size and distribution with high purity in a single-step process.

Item Type:Journal
Additional Information:The authors would like to express their gratitude to Ministry of Science, Technology and Innovation and University of Malaya for the financial support under IRP A research grant _(No: 09-02-03-1020). The authors would also like thank Dr. Harcharan Singh and Prof. K.B. Ramachandran for their guidance. Special thanks also extended to Dr. Frank Lucien from University of New South Wales (UNSW), Australia for his useful advice during equipment setup. The authors also thankful to all the members of Supercritical Fluid Research Group, University of Malaya for the useful discussions and meaningful assistance in completing this project
Keywords:Dense Carbon Dioxide, Gas Anti Solvent, Precipitation, Purification
Subjects:T Technology
ID Code:452

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