Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1989-07-19
1991-12-31
Davis, Curtis R.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208152, 208173, 208171, 208165, 208166, 208157, 208158, 208163, 208164, C10G 3500
Patent
active
050769081
ABSTRACT:
This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed to fill substantially the entire volume of a reactor vessel by introducing the fluids as alternate annular rings of gas and liquid at a rate insufficient to levitate the bed and with catalyst selected by a density, shape and size at a design feed rate of liquids and gas to prevent ebulation of the packed bed at the design feed rates. Catalysts are selected by measuring bed expansion in a large pilot plant run with hydrocarbon, hydrogen, and catalyst at the design pressures and flow velocities. The liquid and gas components of the feed flow into the bed in alternate annular rings across the full area of the bed. At the desired flow rate, such catalyst continually flows in a plug-like manner downwardly through the vessel by introducing fresh catalyst at the top of the bed by laminarly flowing such catalyst in a liquid stream on a periodic or semicontinuous basis. Catalyst is similarly removed by laminarly flowing catalyst particles in a liquid stream out of the bottom of the bed. Intake for such flow is out of direct contact with the stream of gas flowing through the bed and the flow path is substantially constant in cross-sectional area and greater in diameter by several times than the diameter of the catalyst particles.
REFERENCES:
patent: 3336217 (1967-08-01), Meaux
patent: 3873441 (1975-03-01), Jones
patent: 4540547 (1985-09-01), Schuurman
patent: 4571326 (1986-02-01), Bischoff et al.
patent: 4664782 (1987-05-01), Galiasso et al.
Bachtel Robert W.
Kramer David C.
McCall James T.
Scheuerman Georgieanna L.
Smith David S.
Chevron Research & Technology Company
Davis Curtis R.
Phan Nhat
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