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Recovery of Rh catalyst by using membrane process

Rosniza Hanim Binti Abdul Rahim, Rosniza Hanim (2010) Recovery of Rh catalyst by using membrane process. Universiti Teknologi Petronas, Seri Iskandar ,Tronoh,Perak. (Unpublished)

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Abstract

Hydroformylation process is for the synthesis of aldehyde and alcohol starting from alkene. Rh catalyst is used in this process. However, loss of the catalyst during this process usually occurs. Thus, the recovery of this catalyst would be beneficial in reducing material cost. The objectives of this project are to determine the stability of the membrane in the organic solvent, to study the flux of solvents which involve 1-4 dioxane and dodecane as well as to study the rejection of Rh catalyst by using DuramemTM300 by varying operating pressure and catalyst concentration. The membrane technology was used because due to its ability for a very selective, low cost and energy saving separation process. The experiment was carried out by using MET Cell. The compatibility of the solvent-membrane combination was examined by visual inspection and flux study. From the flux study test, the solvent flux is almost in linear form with pressure. 1-4 dioxane and dodecane was found stable in DuramemTM300 with dodecane had higher solvent flux compare to 1-4 dioxane. It was found that the higher molecular weight cut off (MWCO) of membrane was used, the higher solvent flux was gained. Trends in the variation of solvent flux and catalyst rejection with variation of pressure and catalyst concentration were identified using 1-4 dioxane. Increasing pressure significantly increased both solvent flux and catalyst rejection. This is due to increase of driving force exerted inside the MET Cell. By increasing catalyst concentration, the rejection increases, however the solvent flux decreases. The solvent flux was decreased due to the concentration polarization. In addition, the small concentration of catalyst would not give effect on the rejection.The experiment result shows the potential of using membrane technology to recover Rh catalyst by increasing pressure and catalyst concentration.

Item Type: Final Year Project
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 5 not found.
Date Deposited: 03 Nov 2011 11:23
Last Modified: 25 Jan 2017 09:43
URI: http://utpedia.utp.edu.my/id/eprint/1329

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