Recent Developments in
Chlorine Processing
A summary of developments illustrated on
the chlorine processing units
Prepared for the presentation at TECHNOGERMA
by C. Gerrath
KREBS SWISS
a joint venture company of the NUKEM group
Krebs & Co. Ltd Zurich, Switzerland
Chemical and Process Plants
Claridenstr. 20 CH-8022 Zurich
Phone ++41 1 286 74 74 Fax ++41 1 286 74 01
E-mail: krebscoag@access.ch
How to Produce Chlorine ?
Chlorine Liquefaction
How to produce chlorine ?
This illustration opens the door for improvements!!
2RECENT DEVELOPEMENTS IN CHLORINE PROCESSING.DOC
General
Over the past years, the equipment fabrication industry developed rapidly in parallel
with the chemical production industry. New, originally exotic materials of construction
have become common and less costly. Their processing is now well consolidated and
the limits of their application are established. Likewise, new equipment designs and
their application range have been evaluated and are now commercially used.
Worldwide efforts to reduce the use of halogenated hydrocarbon refrigerants in the
industry and increasing concern about the safety of chlorine processing facilities have
also induced substantial changes in the concept of chlorine processing installations.
The chlorine processing, as illustrated below, integrates the following process units:
1) Cooling and filtration of hot wet chlorine gas
2) Drying of „pre-dried“ chlorine gas
3) Scrubbing and cooling of dried chlorine gas, decomposition of NCl3
4) Compression of dried chlorine gas
5) Liquefying of compressed chlorine gas
6) Storage, transfer and filling
7) Vaporisation of liquid chlorine
For the production of dry gaseous or liquid chlorine most downstream process units
are required to get an anhydrous, purified product.
This paper describes the technology currently implementated in modern chlorine
processing installations with a view on economy as well as the effects of the
developments.