1
Mark T Staniulis, Alan P Risch, James G Vassilakis, Donald F Best: Catalytic reduction of nitrogen oxides. UOP, Thomas K McBride, September 19, 1989: US04867954 (63 worldwide citation)

This invention relates to a method for catalytically reducing one or more nitrogen oxides from a gaseous stream containing one or more nitrogen oxides and optionally one or more sulfur oxides which comprises contacting said gaseous stream and ammonia with a microporous molecular sieve composition at ...


2
Donald F Best, Gary N Long, Regis J Pellet, Jule A Rabo, Edward T Wolynic, Frank P Gortsema, Albert R Springer: Hydrocracking catalyst and hydrocracking process. UOP, Vincent J Vasta Jr, January 30, 1990: US04897178 (57 worldwide citation)

A process for hydrocracking a crude oil feed, a hydrocracking catalyst employed therein, and a process for the preparation of this catalyst are disclosed. The hydrocracking catalyst comprises a zeolitic aluminosilicate which has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 6 and which has ...


3
James G Vassilakis, Donald F Best, Gary W Skeels, Edith M Flanigen: Octane gasoline catalyst and process using same in a hydrocracking process. UOP, Thomas K McBride, Richard G Miller, November 3, 1992: US05160033 (37 worldwide citation)

The combination of a steam-stabilized form of zeolite Y, known in the art as Y-85, and a form of zeolite beta which has been modified to maximize the weak acid sites and minimize the strong acid sites, is found to be a uniquely effective acidic component of a hydrocracking catalyst for the productio ...


4
James G Vassilakis, Donald F Best: Novel zeolite compositions derived from zeolite Y. UOP, Thomas K McBride, Richard G Miller, May 7, 1991: US05013699 (35 worldwide citation)

Novel catalyst bases are described which are prepared by hydrothermally treating an ammonium ion exchanged sodium Y zeolite followed by low pH ammonium ion exchange to produce highly crystalline zeolite catalyst base. Catalysts incorporating such novel zeolite catalyst bases, as well as hydrocrackin ...


5
James G Vassilakis, Donald F Best, Gary W Skeels, Edith M Flanigen: Octane gasoline catalyst. UOP, Thomas K McBride, Richard G Miller, May 4, 1993: US05208197 (33 worldwide citation)

The combination of a steam-stabilized form of zeolite Y, known in the art as Y-85, and a form of zeolite beta which has been modified to maximize the weak acid sites and minimize the strong acid sites, is found to be a uniquely effective acidic component of a hydrocracking catalyst for the productio ...


6
James G Vassilakis, Donald F Best: Hydrocarbon conversion process employing a modified form of zeolite Y. UOP, Thomas K McBride, Richard G Miller, May 4, 1993: US05207892 (26 worldwide citation)

Novel catalyst compositions comprising a metal hydrogenation component and a modified form of zeolite Y are found to be highly effective in the hydrocarbon conversion processes carried out in the presence of added hydrogen and involving hydrogenation as an essential reaction mechanism. The modified ...


7
Vinayan Nair, Donald F Best: Modified zeolite omega and processes for preparing and using same. UOP, Thomas K McBride, Richard G Miller, August 18, 1992: US05139761 (16 worldwide citation)

Forms of zeolite Omega synthesized by hydrothermal crystallization from reaction systems containing alkali metal cations and organic templating agents, modified by calcination in air, ion-exchange, steam calcination and treatment with a low-pH aqueous ammonium ion solution, are significantly improve ...


8
Regis J Pellet, Donald F Best, Gary N Long, Jule A Rabo, Edward T Wolynic: Catalytic cracking process. Union Carbide Corporation, Vincent J Vasta Jr, November 1, 1988: US04781815 (12 worldwide citation)

Catalytic cracking catalysts, the process of their preparation and the process of their use. The cracking catalyst comprises a zeolite having a mole ratio of oxides in the dehydrated state of (0.85-1.1) M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2 wherein "M" is a cation having a valence of "n", "x" has ...


9
Vinayan Nair, Donald F Best, Lawrence D Vail: Process for modifying the pore system of zeolite LZ-202. UOP, Thomas K McBride, Richard G Miller, March 9, 1993: US05192727 (9 worldwide citation)

Zeolite LZ-202 and other zeolites synthesized in the absence of organic templating agents and having a crystal structure isotypic with the mineral mazzite are subjected to a three-step treatment to greatly increase their surface area, catalytic activity and adsorptive capacity for adsorbates having ...


10
Donald F Best, Gary N Long, Regis J Pellet, Jule A Rabo, Edward T Wolynic: Hydrocracking catalyst. Union Carbide Corporation, Vincent J Vasta Jr, April 5, 1988: US04735928 (8 worldwide citation)

Process for hydrocracking a crude oil feed, hydrocracking catalyst employed therein and the process for its preparation. The instant invention employs new aluminosilicate zeolite catalysts derived from a new zeolites denominated "LZ-210" which provide hydrocracking catalysts which demonstrate improv ...