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

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

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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 ofstearic acid prepared using Gas Anti Solvent process were also compared with stearic acid particles prepared using conventional method. The resultsshow 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 withconventional 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: Article
Uncontrolled Keywords: Dense Carbon Dioxide, Gas Anti Solvent, Precipitation, Purification
Subjects: T Technology > TP Chemical technology
Depositing User: MS SITI NUR ATIKAH MOHAMAD RUSDI
Date Deposited: 31 Jul 2013 02:56
Last Modified: 31 Jul 2013 02:56
URI: http://repository.um.edu.my/id/eprint/1313

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