1
Tai Hsiang Chao: Phosphorus-modified alumina composite, method of manufacture and use thereof. UOP, Thomas K McBride, John F Spears Jr, Thomas J Filarski, December 16, 1986: US04629717 (58 worldwide citation)

A novel phosphorus-modified alumina composite comprising a hydrogel having a molar ratio on an elemental basis of phosphorus to aluminum of from 1:1 to 1:100 together with a surface area of about 140 to 450 m.sup.2 /gm is defined. The composite is prepared by admixing an alumina hydrosol with a phos ...


2
Tai Hsiang Chao: Stepwise formation of channel walls in honeycomb structures. Allied Signal, Harold N Wells, Thomas K McBride, John G Tolomei, March 14, 1989: US04812276 (47 worldwide citation)

A method for forming honeycomb structures by stepwise formation of channel walls reduces the pressure loading imposed by the extrudable material on a die that uses this method, facilitates the formation of well knitted channel walls, and requires only a minimum amount of lateral flow in the discharg ...


3
Tai Hsiang Chao: Die and method for forming honeycomb structures. Allied Signal, Thomas K McBride, John F Spears Jr, John G Tolomei, May 31, 1988: US04747986 (44 worldwide citation)

An extrusion die for producing multichanneled structures from an extrudable material. The die is composed of a series of pins that correspond to the shape of the channels in the structure. At one end of the pins, the area between the pins is open to define a discharge zone having the shape of the st ...


4
Tai Hsiang Chao: Die for extruding ultrafine honeycomb structures. Allied Signal, Harold N Wells, Thomas K McBride, John G Tolomei, July 11, 1989: US04846657 (44 worldwide citation)

A die for forming honeycomb structures has an arrangement that facilitates fabrication and the support of channel forming pins across the surface of the die by the use of multiple die sections. The die is used for forming multi-channeled honeycomb structures from extrudable materials. The die has a ...


5
Tai Hsiang Chao: Hydrocarbon alkylation processes employing a phosphorus-modified alumina composite. UOP, Thomas K McBride, John F Spears Jr, February 23, 1988: US04727209 (33 worldwide citation)

Hydrocarbon conversion processes including hydrocracking and hydrotreating are performed utilizing a novel phosphorus-modified alumina composite comprising a hydrogel having a molar ratio on an elemental basis of phosphorus to aluminum of from 1:1 to 1:100 together with a surface area of about 140 t ...


6
Tai Hsiang Chao, J W Adriaan Sachtler: Phosphorus-containing alumina catalyst for the isomerization of aromatics. UOP, Thomas K McBride, John F Spears Jr, September 22, 1987: US04695666 (25 worldwide citation)

An improved process for the isomerization of non-equilibrium C.sub.8 aromatics is presented which utilizes a novel catalytic composition. This catalyst comprises phosphorus-containing alumina, a gallium component, and crystalline aluminosilicate zeolite having a silica to alumina ratio of at least 1 ...


7
Tai Hsiang Chao, Michael W Schoonover, Gerald T Stranford: High surface area cordierite catalyst support structures. Allied Signal, Frank S Molinaro, Harold N Wells, Roger H Criss, September 11, 1990: US04956329 (22 worldwide citation)

This invention relates to a catalyst support structure, methods of preparing the support structure and a process for using the support structure. The catalyst support structure is composed of a substantially polycrystalline cordierite phase having a chemical composition by weight of 6-15% MgO, 33-40 ...


8
Tai Hsiang Chao: Phosphorus containing alumina catalyst for the production of aromatics. UOP, Thomas K McBride, John F Spears Jr, March 31, 1987: US04654455 (17 worldwide citation)

Superior tolerance to catalyst coking is obtained with a catalytic composite comprising a gallium component and a crystalline aluminosilicate incorporated with a phorphorus containing alumina. A five-fold reduction in the coke content of the spent catalyst of the instant invention is observed which ...


9
Tai Hsiang Chao, Michael T Cleary: Process for separating fatty acids from rosin acids with phosphorus modified alumina molecular sieve. UOP, James R Hoatson Jr, Louis A Morris, William H Page II, June 4, 1985: US04521343 (16 worldwide citation)

This invention comprises a process for separating a fatty acid from a mixture comprising a fatty acid and a rosin acid, which process comprises contacting the mixture at separation conditions with a molecular sieve comprising silicalite in a phosphorus modified alumina matrix, the precursor of the m ...


10
Fiona P Wilcher, Tai Hsiang Chao: Solid phosphoric acid catalyst. UOP, Thomas K McBride, Eugene I Snyder, January 14, 1992: US05081086 (16 worldwide citation)

A novel solid phosphoric acid catalyst composition is disclosed. The composite comprises solid phosphoric acid and a refractory oxide binder. The composite is characterized in that 25.0 volume percent or less of the total catalyst pore volume consists of pores having a diameter of 10,000 .ANG. or gr ...