Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce alicyclic
Patent
1997-07-24
1999-12-07
Griffin, Walter D.
Chemistry of hydrocarbon compounds
Plural serial diverse syntheses
To produce alicyclic
585256, 585259, 585265, 585 20, C07C 402, C07C 503, C07C 1310, C07C 422
Patent
active
059986832
ABSTRACT:
A method for producing a cyclopentane product which comprises the following steps: (a) cracking dicyclopentadiene to form a cyclopentadiene-rich stream and a higher boiling liquids stream; (b) separating the cyclopentadiene-rich stream from the higher boiling liquids stream; (c) diluting the cyclopentadiene-rich stream with recycled saturates such that the cyclopentadiene content is limited to between about 5-50%; (d) conducting a first hydrogenation of the cyclopentadiene-rich stream in the presence of hydrogen and a first catalyst, and at a temperature (i.e., preferably between about 26 to 94.degree. C., more preferably in the range between about 37 to 66.degree. C.) which is capable of avoiding the repolymerization of cyclopentadiene to dicyclopentadiene, thereby forming a cyclopentadiene-depleted stream; (e) conducting a second hydrogenation of the cyclopentadiene-depleted stream in the presence of a second catalyst wherein any residual olefins and/or cyclopentadiene contained within the cyclopentadiene-depleted stream are saturated, thereby forming a crude cyclopentane product; and (f) flash stripping the crude cyclopentane product to form the cyclopentane product comprising about 95% pure cyclopentane.
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Lattner James R.
McMullen C. Harry
Sanchez Leonel E.
Silverberg Steven E.
Wu Tronze-I Dennis
Collins Douglas J.
Exxon Chemicals Patents Inc.
Griffin Walter D.
Griffis Andrew B.
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