Chemistry of hydrocarbon compounds – Aromatic compound synthesis – Having alkenyl moiety – e.g. – styrene – etc.
Patent
1998-09-08
2000-08-08
Knode, Marian C.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
Having alkenyl moiety, e.g., styrene, etc.
585444, 585654, 585660, 585661, 585911, 585912, 208135, 208134, C07C 402, C07C 264, C07C 5327, C07C 5333, C10G 3504
Patent
active
061004367
ABSTRACT:
A process and apparatus for contacting reactants with a particulate catalyst while indirectly heating the reactants with a heat exchange medium improves temperature control by using an intermediate heat exchange fluid and system to prevent overheating of reactants and maintain parallel heating characteristics through multiple reaction-heat exchange zones. The internal flow path minimizes the circulation of the reaction zone heat exchange fluid by incorporating interstage reheating of the reaction zone heat exchange fluid as it passes in series flow. A particularly useful application of the process and apparatus is in the dehydrogenation of ethyl benzene to produce styrene. The process and apparatus can also be used with simultaneous exchange of catalyst particles by an operation that restricts reactant flow while moving catalyst through reaction stacks in which the reactant flow has been restricted.
REFERENCES:
patent: 5073352 (1991-12-01), Dang Vu et al.
patent: 5525311 (1996-06-01), Girod et al.
patent: 5600052 (1997-02-01), Girod et al.
patent: 5600053 (1997-02-01), Girod et al.
Brandner Kevin J.
Briggs Bruce Allen
Eelch Donald
Tagamolila Constante P.
Wiede, Jr. William
Dang Thuan D.
Knode Marian C.
Tolomei John G.
UOP LLC
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