3 / 40
24
Regular features
3
Comment
by Helen Clark, Administrator of the United Nations
Development Programme
23
CESA Forum
35
Et cetera
36
SAIChE IChemE news/Sudoku 104/Solution to Sudoku 103
Cover story
4
Dewatering pontoons decrease costs and improve
efficiencies
Pontoon or skid-mounted pump setsoffer a flexibility not
always possible with conventional dewatering solutions.
Petrochemicals
6
WirelessHART automates cooling tower operations
Wireless instrumentation and an asset management system
reduce chemical, maintenance, lost production and repair costs.
by Nikki Bishop and Jason Sprayberry, Emerson Process
Management
10
Focus on petrochemicals
Pumps and valves
14
Energy-saving potential in high-vacuum brazing furnaces
using diffusion pumps
For many years, energy efficiency has been the number-one topic
with manufacturers and users of vacuum furnaces for thermal
treatment.The search for energy-saving possibilities concentrated
mainly on the furnaces themselves and the optimisation of the
heat-treatment processes.
by Uwe Zoellig and Hans-Werner Schweizer both of
OerlikonLeybold Vacuum GmbH, Cologne, Germany
18
Focus on pumps and valves
Design and materials of construction
24
HDK
®
pyrogenic silica – Creating products by
closing loops
In chemical terms, pyrogenic silica consists of very pure
amorphous silicon dioxide. Unlike precipitated silica, silica sol or
silica gel, pyrogenic silica is produced by the reaction of
chlorosilanes with hydrogen and oxygen in an oxyhydrogen
flame at over 1 000 °C.
by Dr Robert Johnston, Director Business Team HDK®, Wacker
Silicones, Wacker Chemie AG, Germany
28
Focus on design and materials of construction
Waste management
30
The development of an online biofouling monitor for
cooling water systems
The BOMM device offers a simple means of obtaining
representative sessile samples from Eskom cooling water systems.
by Kelley Reynolds-Clausen, Eskom Holdings SOC Ltd, Research,
Testing and Demonstration, Johannesburg, South Africa
34
Focus on waste management
Contents
Chemical Technology is
endorsed by The South
African
Institution of Chemical
Engineers
Transparency You Can See
Average circulation
(July – September 2014)
Paid: 17
Free: 3 968
Total: 3 715
and the Southern African
Association of Energy
Efficiency
DISCLAIMER
The views expressed in
this journal are not neces-
sarily those of the editor
or the publisher.
Generic images courtesy
of
www.shutterstock.com 14 30 6http://www.chemicaltechnologymagazine.co.za/