Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-07-20
1978-09-26
O'Keefe, Veronica
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260666B, 260666D, C07C 700
Patent
active
041170253
ABSTRACT:
A process for the separation of a diolefin from a mixture thereof with other hydrocarbons having boiling points close to that of the diolefin, comprising subjecting the mixture of hydrocarbons to reaction conditions which will dimerize the diolefin, separating effluent of the dimerization into a first heavy fraction comprising the diolefin dimer and materials of higher boiling point than the diolefin dimer and a first light fraction comprising hydrocarbons having lower boiling points than the diolefin dimer, separating the first heavy fraction into a second heavy fraction comprising materials having higher boiling points than the diolefin dimer and a second light fraction comprising diolefin dimer, passing at least a portion of the second light fraction along with steam through a cracking zone under conditions sufficient to cause the diolefin dimer to be converted to the starting diolefin monomer, using at least a portion of the second heavy fraction as fuel burned to supply heat to the cracking zone, cooling the effluent from the cracking zone to recover a water phase, converting at least a portion of the recovered water to steam and recycling at least a portion of the steam through the cracking zone, and subjecting at least a portion of the dewatered cracking effluent to distillation to recover a hydrocarbon composition which has a greater concentration of the diolefin than did the original mixture of hydrocarbons.
REFERENCES:
patent: 2355392 (1944-08-01), Oberfell
patent: 3377397 (1968-04-01), Maxfield
patent: 3448129 (1969-06-01), Maxfield
patent: 3655793 (1972-04-01), Myers
patent: 3751508 (1973-08-01), Fujiso et al.
patent: 3957894 (1976-05-01), Saeki et al.
Liebert Timothy C.
McClintock William A.
O'Keefe Veronica
Phillips Petroleum Company
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