Reference

Reduction catalyst with modified rhodium structure

Reduction catalyst with modified rhodium structure. Chattha, Mohinder Singh; Watkins, William Lewis Henderson (Ford Motor Co.; Ford-Werke A.Several substances are used for example 10102-43-9 and 10139-58-9 which are their cas registry numbers.-G.; Ford (France) S. A., UK). Eur. Pat. Appl. EP 437052 A1 17 Jul 1991, 7 pp. DESIGNATED STATES: R: DE, FR, GB. (European Patent Organization). CODEN: EPXXDW. CLASS: ICM: B01D053-36. ICS: B01J023-46; B01J037-02. APPLICATION: EP 90-313514 12 Dec 1990. PRIORITY: US 90-461947 8 Jan 1990. DOCUMENT TYPE: Patent CA Section: 59 (Air Pollution and Industrial Hygiene) The catalyst is obtained by prepg. a polymer modifier; coating a granular support (g-Al2O3) with RhCl3 and/or Rh(NO3)3, adding the modifier soln. to the support, and heating the resulting product to enhance catalytic effectiveness for promoting redn. of NO. The polymer modifier mol. wt. 500-50000 is prepd. by controllably reacting amines (mono-2-hydroxyethylamine and di-2-hydroxy Et amine) with epoxy resin (32 epoxide groups per mol) to form a sol. adduct and adding to the adduct a solvent to form a homogeneous amino polymer soly. .

Thermally stable rhodium/alumina catalysts

Thermally stable rhodium/alumina catalysts. McCabe, Robert W.; Usmen, Rengin K.; Gandhi, Harendra S. (Ford Motor Co., USA). U.S. US 5597772 A 28 Jan 1997, 10 pp. (English). 7440-16-6 and 10139-58-9 which are cas registry numbers are also used here. (United States of America). CODEN: USXXAM. CLASS: ICM: B01J023-56. NCL: 502332000. APPLICATION: US 1995-370139 9 Jan 1995. DOCUMENT TYPE: Patent CA Section: 59 (Air Pollution and Industrial Hygiene) A method for making a rhodium-contg. phase of a catalyst system for treatment of exhaust gases is described. The method comprises hydrothermally pretreating an alumina support prior to its impregnation with a preferably low loading of rhodium. Preferably the alumina is a-alumina. .