C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/648
C07C 43/04 (2006.01) C07C 41/06 (2006.01)
Patent
CA 1159473
PROCESS FOR THE MANUFACTURE OF METHYL TERT.-BUTYL ETHER ABSTRACT A process is described for producing methyl tert.-butyl ether in which n-butane is isomerised to isobutane which is then catalytically dehydrogenated to form an isobutane/isobutene mixture, whilst natural gas is reformed to form synthesis gas containing CO and H2 which is in turn converted to methanol, the resulting methanol being etherified with isobutene in the isobutane/isobutene mixture to form methyl tert.-butyl ether. Isobutane is separated from the resulting etherification mixture and is recycled to the dehydrogenation stage. Secondary product gases from at least one of the isomerisation, dehydrogenation and methanol synthesis stages are combusted and used to produce superheated steam at high pressure which is expanded to a medium pressure by expansion through at least one first back-pressure turbine coupled to a corresponding compressor or compressors for compression of at least one of the synthesis gas and of the dehydrogenation product gas, whilst resulting medium pressure steam is expanded in turn through at least one second back-pressure turbine to a low pressure in excess of atmospheric pressure, such low pressure steam being utilised for heating process apparatus.
361943
Mckee (davy) Aktiengesellschaft
Stewart & Kolash Ltd
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