Acetylene is produced conventionally from calcium carbide
at numerous locations close to customers. One contribution
to environmental protection: the acetylene is a by-product
of the petrochemical industry. In Germany, we cover most
of our customer requirements with a dedicated plant for
dispensing petrochemical acetylene.
Hydrogen may be obtained by means of a steam-reformer
from steam, natural gas or other light hydrocarbons.
Refineries and electrolytic processes employed in chlorine
chemistry also generate hydrogen-rich gases from which
the hydrogen can be recovered. All these methods are
used by us, e.g., in Leuna, Buna, and Bitterfeld in
Germany, and the Milazzo refinery in Sicily.
Liquid hydrogen is manufactured in our Ingolstadt plant,
Germany's sole industrial plant for hydrogen liquefaction.
The hydrogen is liquefied at -253°C and is transported
in its liquid state, reducing transport costs.
Gas mixtures are either mixed continuously on site from
pure gases or supplied premixed in cylinders. Our shielding
gases for the metal-processing industry and for the
food-processing industry are examples of different gas
Helium is recovered most cost-effectively from natural
gas. Long-term contracts guarantee access to sources
in the USA, Europe and North Africa.
Carbon dioxide can be recovered from natural, subterranean
gas deposits. At Repcelak (Hungary) - the biggest natural
carbon dioxide source in Europe - we recover more than
100,000 t CO2 every year. In addition, at other locations,
we use carbon dioxide generated in the chemical industry
and purify it to the quality required for the food-processing