Catalyst for hydrohalogenation of hydrocarbons
AssigneeThe Dow Chemical Company
InventorsMichael T. Holbrook, Lawrence A. Hebert, Stephen W. Najmy, Ernest F. Stine, Jr., Reimer Hasche
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Abstract
A process for hydrohalogenating methanol with a hydrogen halide using a catalyst having an initial zone of lower activity and subsequent zones of higher activity so that coke formation and pressure drop are decreased and catalyst life is increased while overall high catalyst activity is maintained. One example of such a process uses a low surface area amorphous alumina in an initial zone and then progressively higher surface area alumina in subsequent zones.
Claims5
A hydrohalogenation catalyst having reduced coking, decreased pressure drop over the catalyst lifetime, and increased catalyst life in a hydrohalogenation reactor charge for the reaction of methanol and a hydrogen halide gas mixture, said catalyst comprising at least two zones wherein the catalytic activity for hydrohalogenation of each zone is lower than that of each succeeding zone.
Dependencies are inferred from the claim text.