Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Patent
1990-07-20
1992-02-18
McFarlane, Anthony
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
208 46, 208152, 208165, 208168, 208169, B01J 812
Patent
active
050891154
ABSTRACT:
Method for effecting contact of a gas with light particles of solid matter, where the particles are retained within particle retention screens to form a bed of particles and the particles move downward in plug flow by means of gravity. When the particles are light, that is, of relatively small size and low density, the velocity of the gas may be sufficiently high that downward movement of particles is hindered by the horizontal forces exerted on the particles by the flowing gas. This invention provides that gas flows through the bed of particles in a downwardly sloping direction instead of in a horizontal direction, so that the force exerted on a particle has a horizontal component and a downward vertical component. The vertical component of the force resulting from gas flow, along with the gravity force on a particle, is sufficient to overcome the frictional resistance to downward movement of a particle which results from the horizontal component of the flowing gas force.
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McBride Thomas K.
McFarlane Anthony
Tolomei John G.
UOP
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