Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Reexamination Certificate
2007-12-18
2010-11-23
Griffin, Walter D (Department: 1797)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
C208S176000, C422S186220, C422S200000, C422S201000, C422S218000, C137S896000, C165S177000
Reexamination Certificate
active
07837856
ABSTRACT:
A reactor for carrying out a continuous oxydehydrogenation of a feed gas stream of saturated hydrocarbons after premixing with an oxygen-comprising gas stream over a moving catalyst bed which is introduced in the longitudinal direction of their reactor between two concentric cylindrical holding devices so as to leave a central interior space and an intermediate space between the moving catalyst bed and the interior wall of the reactor to give a reaction gas mixture, wherein the reactor has two or more reactor sections which are separated from one another by disk-shaped deflection plates arranged alternately in the central interior space and divided in subregions by annular deflection plates arranged in the intermediate space between the moving catalyst bed and the interior wall of the reactor, in each case with a mixing-in device which is located upstream of the moving catalyst bed in the flow direction of the reaction gas mixture and comprises the following elements:two or three rows arranged behind one another of tubes which have turbulence generators on their outside and constrict the flow cross section for the feed gas stream to from ½ to 1/10 of the free flow cross section, with the oxygen-comprising gas stream being passed through the interior spaces of the tubes and being injected via openings in the tubes into the feed gas stream, anda perforated plate upstream of the tubes and a perforated plate downstream of the tubes, is proposed.
REFERENCES:
patent: 1987905 (1935-01-01), Houdry
patent: 4594227 (1986-06-01), Ohsaki et al.
patent: 4869808 (1989-09-01), Vora et al.
Corr Franz
Crone Sven
Olbert Gerhard
BASF - Aktiengesellschaft
Griffin Walter D
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Young Natasha
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