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Ion Exchange and Chromatography Technical Information
Anglovaal Mining Limited (Avmin) is increasing
production at the Chambishi Metals Cobalt Plant in Zambia through its
COSAC Project. The increase in cobalt and copper production will
increase the nickel input to the cobalt purification circuit. In order
to maintain electrowon cobalt metal quality, it is therefore necessary
to remove this nickel from the cobalt advance electrolyte.
Laboratory testwork showed that expansion of the existing fixed bed
nickel ion exchange operation with one additional column could not
guarantee the requirements for the maximum allowable nickel
concentration in the cobalt electrolyte. The addition of more than one
column would have been capital intensive and not feasible from an
economic point of view, and therefore, it was decided to evaluate
continuous nickel ion exchange using ISEP® Carousel technology. An
initial analysis showed that this approach was both technically and
economically the most attractive.
This paper describes the development by Hatch Africa of the continuous
nickel removal ion exchange process that was proposed to Avmin and
implemented at the Chambishi Metals Cobalt Plant, including pilot
scale testwork which was carried out on site in order to obtain the
required data for the detailed design of the
system.
Authors: C. Bailey, G.B. Harris,
R. Kuyvenhoven and J. du Plessis, Hatch Africa, Private Bag X20, Gallo
Manor, 2052 South Africa.
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this paper, please register with
us.
Presented to the 2001 Chem Show Conference;
October 24, 2001
Traditionally, the chemical engineer can rely on chemical separation
methods such as distillation, crystallization, extraction, and
adsorption. This paper presents a process technology for continuous
separations based on ion exchange, adsorption/desorption, and
chromatography. Key advantages and demonstrated process examples are
included.
Calgon Carbon introduced its ISEP® (ion exchange and adsorption)
and CSEP® (chromatography) technology in 1990. The systems are now
installed in more than 300 operating units worldwide. The systems have
demonstrated significant advantages over traditional
approaches.
From a unit operation perspective, the ISEP process can replace
traditional fixed bed adsorption, ion exchange, and chromatography
processes and become increasingly more valuable as the process
complexity increases.
Authors: Mark A. Bollinger, Calgon Carbon
Corporation, Pittsburgh, Pennsylvania, USA.
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this paper, please register with
us.
Chromatography is a new process to most sugar
technologists, yet it is fast becoming a tool of significance for
recovering sucrose and other value by-products.
The CSEP® chromatographic separator, one of the most modern SMB
industrial concepts, is uniquely flexible and adaptable to all the
challenges in the growing use of chromatography for production scale
separations. The technology has already penetrated the food &
sweetener industries on a commercial basis.
The CSEP® and ISEP® concepts comprise a mechanical and process
methodology to efficiently bring into contact liquids and solids as
two counter-current contacting streams. In the areas of adsorption
and ion exchange the commercial success of the ISEP has been
demonstrated repeatedly over the last ten years.
The paper explains some of the process thinking that goes into the
construction of actual CSEP® separation plant configurations and
includes references to sugar-related applications.
Authors: G.J. Rossiter, Advanced Separation
Technologies, Lakeland, Florida, USA.
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this paper, please register with
us.
Visit the Calgon Carbon Engineered Solutions web site for more technical papers and other decision-critical information about our ISEP® and CSEP® continuous process purification and separation equipment for industrial processes and environmental applications.
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