Fabrication method of zeolite honeycomb type catalyst for reducing nitrogen oxide
December 24, 2028. 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 3557024 Method of zeolitic catalyst manufacture Method for the reduction of nitrogen oxides from waste gases using a zeolite Molecular sieve-palladium-platinum catalyst on a substrate Reduction in the quantity of NOx in lean exhaust gas of motor vehicle engines Method for preparing catalysts comprising zeolites Process for decomposing ammonia in an off-gas Method of treating waste water and apparatus for treating waste water using the method Patent #: 6652759 InventorsAssigneeApplicationNo. 12863024 filed on 12/24/2008US Classes:423/213.2Utilizing as solid sorbent, catalyst, or reactant a material containing a transition elementExaminersPrimary: Vanoy, TimothyAttorney, Agent or FirmForeign Patent References
International ClassesB01D 53/56B01D 53/94 C01B 39/00 AbstractThe present invention relates to conversion of exhaust gas containing nitrogen oxide (NOx) such as NO, NO2 and N2O into N2 and H2O through catalytic reaction with injection of a reducing agent such as ammonia and urea. A fabrication method of zeolite honeycomb type catalyst for reducing nitrogen oxide of the present invention includes: (a) obtaining an inorganic binder by mixing and uniformly peptizing pseudo-boehmite, distilled water and a pH adjuster; (b) obtaining a paste by mixing and kneading zeolite, the inorganic binder, an organic binder and distilled water; (c) extruding the paste into an extrudate having a through pore of a regular structure; and (d) drying and heat treating the extrudate. |
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