Autorefrigerated isomerization process

Details Autorefrigerated isomerization process Autorefrigerated isomerization process

1976-01-02

1977-09-13

Crasanakis, George

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26068375, C07C 528

Patent

active

040482510

ABSTRACT:
Acyclic and alicyclic aliphatic hydrocarbons are isomerized to form a product of enhanced octane by contacting same, in a reaction zone and in the presence of hydrogen, with a catalyst comprising a difficultly reducible metal halide in combination with at least a molar equivalent of hydrogen halide, said reaction zone comprising at least one temperature zone, the temperature in at least one zone being controlled by using said hydrogen halide as an autorefrigerant. In a preferred embodiment, at least a portion of the autorefrigerant evolved from the reaction zone is condensed and used to extract at least a portion of the metal halide component of the catalyst from at least a portion of the hydrocarbon product. A preferred catalyst is tantalum pentafluoride, niobium pentafluoride or their mixtures in combination with at least a five-fold molar excess of hydrogen fluoride.

REFERENCES:
patent: 2232674 (1941-02-01), Pyzel
patent: 2418146 (1947-04-01), Upham

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