1
Zhicheng Hu, Chung Zong Wan, Yiu Kwan Lui, Joseph C Dettling: Layered catalyst composite. Engelhard Corporation, R A Negin, January 28, 1997: US05597771 (131 worldwide citation)

The present invention relates to a layered catalyst composite of the type generally referred to as a three-way conversion catalyst having the capability of substantially simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. The structure of ...


2
Joseph H Z Wu, Shiang Sung, Zhicheng Hu, John J Steger: Catalyst composition containing oxygen storage components. Engelhard Corporation, Richard A Negin, April 27, 1999: US05898014 (49 worldwide citation)

The present invention relates to a zirconium, rare earth containing composition comprising zirconium, cerium, neodymium and praseodymium components and the use of this composition in a catalyst composition useful for the treatment of gases to reduce contaminants contained therein and method process ...


3
Shau Lin Franklin Chen, Zhicheng Hu: Exhaust gas treatment catalyst. BASF Catalysts, Melanie L Brown, Brian W Stegman, Scott S Serrilla, May 20, 2008: US07374729 (47 worldwide citation)

Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises: (a) a carrier; (b) a first layer deposited on the carrier, said first layer comprising substantially only at least one refractive metal oxide; (c) a second layer deposited on the first ...


4
Jeffrey B Hoke, John R Novak, John J Steger, Terence C Poles, L Michael Quick, Ronald M Heck, Zhicheng Hu, Michael Durilla: Method and apparatus for treating the atmosphere. Engelhard Corporation, Richard A Negin, April 10, 2001: US06214303 (42 worldwide citation)

Method and apparatus for treating the atmosphere to lower the concentration of pollutants therein in which ambient air is passed into operative contact with a stationary substrate having at least one ambient air contacting surface having a pollutant treating material thereon.


5
Zhicheng Hu, Patrick L Burk, Shau Lin F Chen, Harold N Rabinowitz, Christopher M Minnella, Aaron N Israel: Exhaust articles for internal combustion engines. Engelhard Corporation, Richard A Negin, Melanie L Brown, Scott S Servilla, October 2, 2007: US07276212 (37 worldwide citation)

Provided is a base metal undercoat containing catalyst and an exhaust article containing the catalyst. The catalyst contains a base metal undercoat with an oxygen storage component, and at least one catalytic layer. Also provided are methods for preparing the catalyst and methods for monitoring the ...


6
Zhicheng Hu, Ronald M Heck, Rudolf M Smaling, Alan R Amundsen: Engine exhaust treatment apparatus and method of use. Englehard Corporation, Richard A Negin, December 24, 2002: US06497851 (35 worldwide citation)

An exhaust gas treatment apparatus and method for its use includes an upstream catalyst and a downstream catalyst. The upstream catalyst contains a catalytic metal effective at least for the oxidation of hydrocarbons in the exhaust gas stream, and preferably contains a palladium catalytic component ...


7
John S Foong, Zhicheng Hu: Layered exhaust treatment catalyst. BASF Corporation, Bronwen M Loeb, Drinker Biddle & Reath, September 14, 2010: US07795172 (27 worldwide citation)

A layered exhaust treatment catalyst comprising: (a) a carrier such as cordierite; (b) a first layer deposited on the carrier comprising a palladium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina; ...


8
Zhicheng Hu, Ronald M Heck, Harold N Rabinowitz: Close coupled catalyst. Engelhard Corporation, Richard A Negin, April 4, 2000: US06044644 (25 worldwide citation)

A stable, close-coupled catalyst, an article comprising the close-coupled catalyst and a related method of operation. The close-coupled catalyst comprises a catalyst support and a palladium catalytic component. Preferably and optionally, there are stabilizers including alkaline metal oxide, and rare ...


9
Zhicheng Hu, Ronald M Heck, Harold N Rabinowitz: Method for using a close coupled catalyst. Engelhard Corporation, Richard A Negin, July 3, 2001: US06254842 (22 worldwide citation)

A stable, close-coupled catalyst, an article comprising the close-coupled catalyst and a related method of operation. The close-coupled catalyst comprises a catalyst support and a palladium catalytic component. Preferably and optionally, there are stabilizers including alkaline metal oxide, and rare ...


10
Shau Lin Franklin Chen, Zhicheng Hu: Exhaust gas treatment catalyst. BASF Catalysts, Scott S Servilla, Diehl Servilla, Melanie L Brown, March 10, 2009: US07501098 (16 worldwide citation)

Provided are an exhaust treatment catalyst and an exhaust article containing the catalyst. The catalyst comprises a carrier; a first layer deposited on the carrier, said first layer comprising substantially only at least one refractory metal oxide; a second layer deposited on the first layer, said s ...