Effects of temperature and solvent concentration on the solvent crystallization of palm-based dihydroxystearic acid with isopropyl alcohol--颗粒学报PARTICUOLOGY

Koay, G. F. L., Chuah, T.-G., Zainal-Abidin, S., Ahmad, S., & Choong, T. S. Y. (2012). Effects of temperature and solvent concentration on the solvent crystallization of palm-based dihydroxystearic acid with isopropyl alcohol. Particuology, 10(1), 127–131. https://doi.org/10.1016/j.partic.2011.04.011

Effects of temperature and solvent concentration on the solvent crystallization of palm-based dihydroxystearic acid with isopropyl alcohol

Gregory F.L. Koay ^{a b}, Teong-Guan Chuah ^{a c *}, Sumaiya Zainal-Abidin ^{b d}, Salmiah Ahmad ^{b e}, Thomas S.Y. Choong ^a

a Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
b Advanced Oleochemical Technology Division, Malaysian Palm Oil Board, 43650 Bandar Baru Bangi, Selangor Darul Ehsan, Malaysia c Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
d Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 25000 Kuantan, Pahang Darul Makmur, Malaysia
e Director General's Office, Malaysian Rubber Board, 50450 Kuala Lumpur, Malaysia

10.1016/j.partic.2011.04.011

Volume 10, Issue 1, February 2012, Pages 127-131

Received 16 December 2010, Revised 15 February 2011, Accepted 1 April 2011, Available online 21 November 2011.

E-mail: chuah@eng.upm.edu.my; tgc615@hotmail.com

Highlights

Abstract

Palm-based dihydroxystearic acid of 69.55% purity was produced in a 500-kg-per-batch operation pilot plant and purified through solvent crystallization in a custom fabricated simultaneous batch crystallizer unit. The effects of temperature and solvent concentration on yield, particle size distribution and purity were studied. The purity was higher, while the yield and particle size were lower and smaller, respectively, at higher temperature and solvent concentration. The solvent crystallization process efficiency was rated at 66–69% when carried out with 70–80% isopropyl alcohol at 20 °C.

Graphical abstract

Keywords

Dihydroxystearic acid; Pilot plant operation; Solvent crystallization; Simultaneous batch crystallizer; Process efficiency

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