Catalyst for treatment of exhaust gases from internal combustion engines
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-053/36
출원번호
US-0269389
(1988-11-09)
발명자
/ 주소
Bricker Maureen L. (Buffalo Grove IL) Lawson R. Joe (Palatine IL)
출원인 / 주소
Allied-Signal Inc. (Morris Township, Morris County NJ 02)
인용정보
피인용 횟수 :
21인용 특허 :
8
초록▼
This invention relates to a catalytic composite for treating an exhaust gas comprising a support which is a refractory inorganic oxide having dispersed thereon lanthanum, at least one other rare earth component and at least one noble metal component selected from the group consisting of platinum, pa
This invention relates to a catalytic composite for treating an exhaust gas comprising a support which is a refractory inorganic oxide having dispersed thereon lanthanum, at least one other rare earth component and at least one noble metal component selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium. An essential feature of said catalytic composite is that the lanthanum be present as crystalline particles of lanthanum oxide which have an average crystallite size of less than about 25 Angstroms. The support may be selected from the group consisting of alumina, silica, titania, zirconia, aluminosilicates and mixtures thereof with alumina being preferred. Illustrative of the other rare earth components are cerium, neodymium, praeseodymium, dysprosium, europium, holmium and ytterbium. An important feature in manufacturing the catalytic composite is the dispersion of lanthanum oxide onto said refractory inorganic oxide support. In a specific example, lanthanum may be dispersed on alumina as follows. A solution of a lanthanum salt is mixed with a hydrosol of aluminum, particles are formed from said lanthanum containing hydrosol, calcined to form an inorganic oxide particle containing lanthanum oxide, ground to give a powder of alumina containing finely dispersed lanthanum oxide. This powder in turn can be mixed with another rare earth oxide such as cerium oxide to a slurry which in turn is used to coat a solid monolithic carrier. Finally, at least one noble metal component is dispersed on said coated solid monolithic carrier.
대표청구항▼
A process for the treatment of exhaust gases which comprises contacting said gases with a catalytic composite comprising a support which is a refractory inorganic oxide selected from the group consisting of alumina, silica, titania, zirconia, aluminosilicates and mixtures thereof, having dispersed t
A process for the treatment of exhaust gases which comprises contacting said gases with a catalytic composite comprising a support which is a refractory inorganic oxide selected from the group consisting of alumina, silica, titania, zirconia, aluminosilicates and mixtures thereof, having dispersed thereon lanthanum oxide, the lanthanum oxide being dispersed on said support by the method of commingling a solution of a lanthanum salt with a hydrosol of the metal precursor of said support, forming particles from said lanthanum containing hydrosol, calcining said particles to form a particulate support containing lanthanum oxide, having an average crystallite size of less than 25 Angstroms, at least one other rare earth oxide and at least one noble metal component selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium.
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이 특허에 인용된 특허 (8)
Joy ; III George C. (Arlington Heights IL) Lester George R. (Park Ridge IL) Marinangeli Richard E. (Arlington Heights IL), Catalyst for minimizing the H2S emissions from automotive exhaust and method of its manufacture.
Cho Byong K. (Rochester Hills MI) Stock Christopher J. (Southfield MI), Catalyst for simultaneous NO decomposition and CO oxidation under cycled operating conditions.
Bricker Maureen L. (Buffalo Grove IL) Lawson R. Joe (Palatine IL), Catalyst for treatment of exhaust gases from internal combustion engines and method of manufacturing the catalyst.
Kim Gwan (Olney MD) Ernest Michael V. (Baltimore MD) Plecha Stanislaw (Baltimore MD), Catalysts for controlling auto exhaust emissions including hydrocarbon, carbon monoxide, nitrogen oxides and hydrogen su.
Kim Gwan (Olney MD) Ernest Michael V. (Catonsville MD), Stabilized and doubly promoted platinum group metal catalysts for emission control and method of making same.
Poojary, Damodara M.; Dalla Betta, Ralph Albert; McCarty, Jon Gilbert, Catalyst composition and structure for a diesel-fueled autothermal reformer placed in and exhaust stream.
Gore, Ashok Yeshwant; Schauer, Edward A.; Stewart, Matthew; Singh, Ramsharan, Lanthanum carbonate hydroxide, lanthanum oxycarbonate and methods of their manufacture and use.
Goia, Dan V.; Lopez, Marco; Sau, Tapan Kumar; Jitianu, Mihaela-Ortansa, Method for manufacture of noble metal alloy catalysts and catalysts prepared therewith.
Moerck, Rudi E.; Spitler, Timothy Malcome; Schauer, Edward A.; Prochazka, Jan, Rare earth metal compounds, methods of making, and methods of using the same.
Moerck, Rudi E.; Spitler, Timothy Malcome; Schauer, Edward A.; Prochazka, Jan, Rare earth metal compounds, methods of making, and methods of using the same.
Moerck, Rudi E.; Spitler, Timothy Malcome; Schauer, Edward A; Prochazka, Jan, Rare earth metal compounds, methods of making, and methods of using the same.
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