Catalytic system particularly for the postcombustion of exhaust gases and a method of producing such a system
Patent 5196389 Issued on March 23, 1993. Estimated Expiration Date: 
April 24, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 24, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3189472 Process for converting nitrogen dioxide into nitrogen monoxide Process for the production of high surface area catalyst supports Exhaust gas catalysts and process for the production thereof Process for producing silicon carbide and metal carbides Patent #: 4948573 InventorAssigneeApplicationNo. 873198 filed on 04/24/1992US Classes:502/178, Silicon carbide423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/213.5, Group VIII element423/439, Binary compound (e.g., carbide, etc.)423/440, Refractory metal containing501/87, Carbide or oxycarbide containing501/91, And different carbide501/92, And boride, silicide, nitride, or oxynitride502/177, Carbide502/179, Group VA (N, P, As, Sb, Bi) containing502/527.19MONOLITH WITH SPECIFIED SHAPE OR DIMENSION OF CELL OPENING (E.G., HONEYCOMB, RINGS, ETC.)ExaminersPrimary: Konopka, P. E.Attorney, Agent or FirmInternational ClassesB01J 027/224B01J 027/22 C04B 035/52 C01B 031/36 Foreign Application Priority Data1991-04-29 FRAbstractThe invention relates to a catalytic system and to a method of producing such a system.The catalytic system consists of a support on which the catalytically active product is deposited. The support has mechanical or physical properties which are of interest in terms of the required working conditions, but a poor specific surface area. The catalytically active product, a metallic carbide, is obtained by coating the support in a suspension of a reducible compound of the metal in a solution of an organic compound, carbonizing this compound, reducing the metallic compound and carburizing the metal. The carbide thus obtained has a high specific surface area.Preferably, the support consists of silicon carbide produced by carbonizing a paste containing silicon, carbon and an organic resin.The invention is applicable to any form of catalyst but in particular to the monolithic catalysts intended for treating exhaust gases. |
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