Degussa’s ambitious Aerosil® investment projects in Leverkusen and in Roussillon, France, are making good progress
03-Jul-2001
Degussa AG, Düsseldorf, is appreciably expanding its production capacity for the
pyrogenic silica Aerosil®. Currently, two new plants are under construction in Leverkusen
on the grounds of Bayer AG in that city and in Roussillon, France, on the grounds of Rhodia
Silicones S.A.S. The two plants will probably start their regular production in the middle of
2002. ”Our total Aerosil capacity will then be increased by several thousand metric tons a
year,“ stresses Degussa executive vice president Carl Voigt. Both plants are
state-of-the-art, and, in addition, are integrated in the raw material network at the sites. With
these investments, Degussa adds about 40 new jobs.
The plant in Leverkusen is located on an approx. 4,000 square meter lot right along the river
Rhine. A contract with GE Bayer Silicones GmbH & Co. KG, a joint venture between General
Electric Company and Bayer AG for production of silicone products, secures the at site
consumption of Aerosil® for the production of sealants and elastomers. Both, the
Leverkusen plant and the production in Roussillon are integrated in the respective
production networks at site. Thus, both plants promote ecological advantages at their
respective sites, because they substantially reduce the number of Silane shipments and
also help close the hydrochloric acid cycle. In Roussillon, a contract with Rhodia silicones
regulates the supply of Aerosil® into this French manufacturer’s silicone production. The
plant is operated by Aerosil France SARL, a wholly owned subsidiary of Degussa France.
As a world leading manufacturer of pyrogenic silicas, which the business unit Aerosil &
Silanes sells under the trade name Aerosil®, Degussa operates plants in Rheinfelden
(Germany), Antwerp (Belgium), Mobile and Waterford in the USA and Yokkaichi in Japan,
and in the future, also in Leverkusen and in Roussillon.
Aerosil® is a pyrogenic (fumed) silica, i.e., a silica manufactured in a high-tech combustion
process. Different particle sizes of this white powder are achieved by the precise
adjustment and control of a large number of process parameters. Depending on
applications, Aerosils are produced in different particle sizes. The individual Aerosil grades
are distinguished by their surface area in meters squared per gram (there are standard
types ranging from 90 to 380 m2/g). In silicone rubber and sealants, Aerosil® is used as a
reinforcing filler. It also helps to achieve the correct consistency of paints as well as
adhesives, etc., thus enabling for instance the manufacture of non-dripping paints. Further,
Aerosil® is used in pharmaceuticals and in the manufacture of cosmetics. In
high-temperature applications, it is used for insulation. The microchip industry uses Aerosil®
as an ultrafine polishing agent.
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