Robert W Pfeiffer Deceased180 Broad St UNIT 1401, Stamford, CT 06901

4331533, May 25, 1982

Jul 15, 1980

6/169087

Robert R. Dean - Littleton CO
Jean-Louis Mauleon - Aurora CO
Robert W. Pfeiffer - Bronxville NY

C10G 1118
C10G 1104
B01J 2120
B01J 2938

208113

A hydrocarbon conversion-catalyst regeneration process and apparatus is described for converting residual oils and regeneration of catalyst in two separate low and higher temperature regeneration stages stacked one above the other on the same or different vertical axis to provide catalyst at a temperature above the residual feed pseudo-critical temperature. A CO rich flue gas is recovered from the low temperature regeneration stage and a CO. sub. 2 rich flue gas is recovered from the higher temperature regeneration stage. The temperature of the catalyst mixed with the residual oil feed is sufficient to obtain substantially complete vaporization of the residual oil charge. A special arrangement of apparatus is provided in the lower portion of a riser conversion zone to obtain the intimate vaporization contact between residual oil feed and the high temperature catalyst charged to the riser.

5205537, Apr 27, 1993

Jul 26, 1991

7/736702

Robert W. Pfeiffer - Rye NY

F16K 326
F16K 332

251205

A control valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice is mounted for movement, within the slide chamber to seal the flow passageway when the flow orifice is out of registration therewith and to connect the inlet and outlet passages in flow communication when registered therewith. The flow orifice has a cross section including a tapered slot portion which terminates in an apex defining an angle of from about 45 to 90 degrees and a rectangular base portion or a circular arc base portion subtending from 225 to about 270 degrees of arc. This shape provides valves of enhanced rangeability with a unique logarithmic flow characteristic which, for most flow rates, is intermediate to linear and equal percentage flow characteristics.

4336160, Jun 22, 1982

Jul 15, 1980

6/169480

Robert R. Dean - Alma MI
Jean-Louis Mauleon - Alma MI
Robert W. Pfeiffer - Bronxville NY

B01J 2120
B01J 2938
C10G 1118
C10G 1104

252417

A side by side hydrocarbon conversion-two staged stacked catalyst regeneration arrangement is provided wherein the first stage of catalyst regeneration is temperature restricted to achieve incomplete removal of carbon deposits and a second higher temperature regeneration is accomplished in an upflowing catalyst contact system under conditions to accomplish removal of residual carbon on the catalyst and produce a CO. sub. 2 -rich flue gas. A special external cyclone separator arrangement may be attached to either of the second stage regeneration operation or the riser hydrocarbon conversion operation to effect separation of catalyst particles from gasiform material.

4664139, May 12, 1987

Jan 12, 1984

6/570171

Robert W. Pfeiffer - Rye NY

F16K 326
F16K 332

137240

An improved valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice, which is preferably of extended length extending transversely through it is mounted for sliding movement within the slide chamber to seal the flow passageway when the flow orifice is out of register therewith and to connect the inlet and outlet passages in flow communication when registered therewith. The flow orifice is preferably of ovoid cross-section and provides, at all operating positions of the valve, a cross-sectional flow area from the flow orifice to the outlet passage which is at least as great as the smallest cross-sectional flow area of the flow orifice. The flow orifice in its wide open position does not restrict the cross-sectional area available for flow between the inlet and outlet passages of the valve body.

4332674, Jun 1, 1982

Jul 15, 1980

6/169086

Robert R. Dean - Littleton CO
Jean-Louis Mauleon - Aurora CO
Robert W Pfeiffer - Bronxville NY

C10G 1116

208120

A hydrocarbon conversion-catalyst regeneration process and apparatus is described for converting residual oils and regeneration of catalyst in two separate low and higher temperature regeneration stages stacked one above the other on the same or different vertical axis to provide catalyst at a temperature above the residual feed psuedo-critical temperature. A CO rich flue gas is recovered from the low temperature regeneration stage and a CO. sub. 2 rich flue gas is recovered from the higher temperature regeneration stage. The temperature of the catalyst mixed with the residual oil feed is sufficient to obtain substantially complete vaporization of the residual oil charge. A special arrangement of apparatus is provided in the lower portion of a riser conversion zone to obtain the intimate vaporization contact between residual oil feed and the high temperature catalyst charged to the riser.

5462717, Oct 31, 1995

May 17, 1994

8/245461

Robert W. Pfeiffer - Rye NY

B01J 818
B01J 2034
F27B 1514
F28D 700

422146

Apparatus and processes are disclosed for carrying out chemical reactions of the type in which a fluidized particulate solid is contacted with reactants in a reaction vessel or conduit and then separated from the reactant products and regenerated in a regeneration process, such as combusting the carbonaceous deposit which accretes on fluid catalytic cracking catalyst particles. The regeneration reaction may change the temperature of the regenerated catalyst particles and in such case it is often required to subject the particles to heat exchange to provide them at a temperature suitable for recirculation to the reaction zone. The processes and apparatus of the invention essentially provide for dividing the fluidized solids regeneration bed into an uppermost bed zone and at least one lower bed zone by a horizontal occlusion zone disposed at a vertically intermediate portion of the bed. The regeneration is fully or partially carried out in the uppermost bed zone, and further regeneration of and/or heat exchange with the regenerated particles is carried out in the occlusion zone and/or the lower bed zone. The intermediate occlusion zone inhibits backmixing of the fluidized particles, thereby permitting suitable temperature differences to be maintained between the fluidized beds.

5368276, Nov 29, 1994

Apr 26, 1993

8/053077

Robert W. Pfeiffer - Rye NY

F16K 326
F16K 332

251205

A control valve well-suited for controlling the flow of particulate solids comprises a valve body having a flow passageway comprising inlet and outlet passages extending transversely to a slide chamber. A plug member having a flow orifice is mounted for movement within the slide chamber to seal the flow passageway when the flow orifice is out of register therewith and to connect the inlet and outlet passages in flow communication when registered therewith. One of the inlet passage and the flow orifice has a cross section including a tapered slot portion which terminates in an apex defining an angle of from about 45 to 90 degrees and an associated polygonal base portion or circular arc base portion subtending from 225 to about 270 degrees of arc. The other has a peripheral shape which includes a leading edge disposed substantially perpendicular to the direction of travel of the plug member. This arrangement provides valves of enhanced rangeability with a unique logarithmic flow characteristic which, for most flow rates, is intermediate to linear and equal percentage flow characteristics.