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Browsing Other Theses by Department "Department of Chemical Engineering"

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Deriving a rate equation for the removal of manganese from solution using a gas mixture of sulphur dioxide and oxygen

Author: Schulze-Messing, Jacobus Date: 2005 The use of a sulfur dioxide - oxygen gas mixture to selectively remove manganese from other metals, such as cobalt and nickel, from leach solutions is kinetically favourable and inexpensive. However, this technology for precipitating manganese ... Read more
Desalination and tertiary treatment of wastewater by continuous countercurrent ion exchange utilizing sulphuric acid and lime as regenerating chemicals.

Author: Hendry, Bruce Alexander Date: 1982 Read more
Development and assessment of a hydrometallurgical process to treat chromium-containing dusts

Author: Von Blottnitz, Harro Bloch Date: 1994 Read more
The effect of temperature and crystallite size on the growth and morphology of carbon nanotubes

Author: Kleinsmidt, Jacques N Date: 2005 The aim of the study was to synthesise iron oxide crystallites with different crystallite sizes supported on y-A120 3 using the reverse micelle technique. It was hypothesised that changing the crystallite size of the synthesised iron oxide ... Read more
Energy retrofit of an oil refinery using pinch technology

Author: Gillespie, Noel Edward Date: 1989 Read more
Gold catalysts prepared by ion exchange for use in ethylene glycol oxidation: An exploratory study

Author: Case, Jennifer Margaret Date: 2009 Heterogeneous catalysis using supported gold nanocrystallites has attracted increasing attention over the last two decades for its applicability to a wide range of reactions, offering activity under ambient conditions, as well as high ... Read more
A hydrodynamic investigation of fine particle flotation in a batch flotation cell

Author: Deglon, David Alan Date: 1998 Read more
A hydrodynamic study of nickel suspension in stirred tanks

Author: Aoyi, Ochieng Date: 2005 Many studies on solid-liquid mixing have been dedicated to low density particles at low solids concentrations. In the present work, computational fluid dynamics (CFD) simulation and experimental methods were employed to study suspension of ... Read more
Industrial application of eutectic freeze crystallization

Author: Jivanji, Rineshkumar Bharat Date: 2011 South African industries are currently generating increasing quantities of hypersaline brine streams. These wastewater streams need to be processed in an ecologically friendly and economically favourable method to produce both purified water ... Read more
The interactive effect of depressant type and dosage with frother dosage in the flotation of a PGE ore

Author: Dhliwayo, Evelyn Chengetanai Date: 2005 The valuable components of the platinum group element (PGE) bearing ores of the Bushveld complex in South Africa constitute between 1 % and as little as 0.1 % of the total mass. In the processing of these ores by flotation, the naturally ... Read more
Mathematical Modelling of Catalytic Distillation in a 1-Hexene Hydrogenation System

Author: Nieuwoudt, Josias Jakobus Date: 2010 Read more
Microdest - Micro-computer analyses and design of planar steel frames

Author: Herring, Henry Frank Date: 1986 Read more
Modeling of a counter-current adsorption process for removal and recovery of dissolved organics from aqueous effluents

Author: Copcutt, Robert Charles Date: 1988 Read more
Multivariable control of a rougher flotation cell

Author: Van Schalkwyk, Theo Date: 2002 This project focussed on the investigation, development and evaluation of a closed loop control system on a rougher flotation cell that could improve PGM flotation performance. A PGM rougher flotation cell equipped with Online Stream Analysis ... Read more
Optimisation of complex distillation colomn systems using rigorous models

Author: Hughes, Michael John Date: 2010 Since distillation is still the most widely used separation technique used in the petrochemical industry, optimisation of these unit operations are important to minimise costs and maximise production. This thesis focuses on the development ... Read more
The optimization of the ZSM-5 catalyst activity with respect to crystallinity

Author: Modutwane, Angel Tumelo Date: 2005 In the synthesis of zeolites optimization of factors such as crystallinity, which encapsulates morphology, and acidity can result in optimal activity. Optimal activity is vital in chemical industries due to the fact that it results in higher ... Read more
Phosphate precipitation as struvite from municipality wastewater

Author: Ramaru, Rendani Date: 2009 Tshwane Municipality produces approximately 4Ml/day of dewatering liquors arising from municipal sludge from a wastewater treatment plant. The sludge being dewatered is a combination of an anaerobically digested primary sludge and an undigested ... Read more
Precipitation of nickel and cobalt sulphides using different reactor configurations

Author: Swartbooi, Ashton Mark Date: 2005 The nickel reduction process produces a stream containing unreacted dissolved nickel and cobalt. Removal of these metals to optimum levels is desired, however, the product should also be easy to handle and the process easy to incorporate into ... Read more
Quantification of biomass in a biooxidation system

Author: Moon, Jo-Ann Helen Date: 1996 [Page1 is in the PDF] The aim of this study was to investigate and compare various methods to enumerate the number of bacteria in a minerals biooxidation system. In this system most of the bacteria are attached to fine particles of ore and ... Read more
The role of collectors in the flotation of partially oxidised copper ores

Author: Hangone, Gregory Date: 2004 The effects of xanthates, dithiophosphates, dithiocarbamates and mixtures of these collectors on the froth flotation performance of partially oxidised and oxidised copper sulphide ores were investigated in this study. More specifically, the ... Read more

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