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1. US20070244349 - Method for producing butadiene from n-butane

Amt Vereinigte Staaten von Amerika
Aktenzeichen/Anmeldenummer 11718814
Anmeldedatum 11.11.2005
Veröffentlichungsnummer 20070244349
Veröffentlichungsdatum 18.10.2007
Erteilungsnummer 7417173
Erteilungsdatum 26.08.2008
Veröffentlichungsart B2
IPC
C07C 5/00
CChemie; Hüttenwesen
07Organische Chemie
CAcyclische oder carbocyclische Verbindungen
5Herstellung von Kohlenwasserstoffen aus Kohlenwasserstoffen, die die gleiche Anzahl von Kohlenstoffatomen im Molekül enthalten
C07C 5/333
CChemie; Hüttenwesen
07Organische Chemie
CAcyclische oder carbocyclische Verbindungen
5Herstellung von Kohlenwasserstoffen aus Kohlenwasserstoffen, die die gleiche Anzahl von Kohlenstoffatomen im Molekül enthalten
32durch Dehydrierung unter Bildung von freiem Wasserstoff
327Bildung von ausschließlich nichtaromatischen Kohlenstoff-Kohlenstoff-Doppelbindungen
333Katalytische Verfahren
CPC
C07C 7/09
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
7Purification; Separation; Use of additives
09by fractional condensation
C07C 5/333
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
5Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
32by dehydrogenation with formation of free hydrogen
327Formation of non-aromatic carbon-to-carbon double bonds only
333Catalytic processes
C07C 5/48
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
5Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
42by dehydrogenation with a hydrogen acceptor
48with oxygen as an acceptor
Anmelder BASF Aktiengesellschaft
Erfinder Crone Sven
Klanner Catharina
Schindler Götz-Peter
Duda Mark
Borgmeier Frieder
Vertreter Connolly Bove Lodge &; Hutz LLP
Prioritätsdaten 102004054766 12.11.2004 DE
Titel
(EN) Method for producing butadiene from n-butane
Zusammenfassung
(EN)

Processes for producing butadiene from n-butane comprising: (a) providing a feed gas stream comprising n-butane; (b) non-oxidatively dehydrogenating the feed gas stream in the presence of a catalyst in a first dehydrogenation zone to form a first intermediate gas stream comprising n-butane, 1-butene, 2-butene, butadiene and hydrogen; (c) oxidatively dehydrogenating the first intermediate gas stream in the presence of an oxygenous gas having an oxygen content of at least 75% by volume in a second dehydrogenation zone to form a second intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (d) compressing and cooling the second intermediate gas to form a first condensate stream comprising water and a third intermediate gas stream comprising n-butane, butadiene, hydrogen, carbon dioxide and steam; (e) compressing and cooling the third intermediate gas to form a second condensate stream comprising n-butane, butadiene and water and a fourth intermediate gas stream comprising n-butane, butadiene, hydrogen and carbon dioxide; (1) cooling the fourth intermediate gas stream to form a third condensate stream comprising n-butane and butadiene, and an offgas stream comprising carbon dioxide and hydrogen; (g) removing water from the second condensate stream and combining the second condensate stream and third condensate stream to form a C4 hydrocarbon stream comprising n-butane and butadiene; and (h) separating the C4 hydrocarbon stream to form a recylce stream comprising n-butane and a product stream comprising butadiene; wherein at least a portion of the recycle stream is fed to the first dehydrogenation zone.

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