A Caltech Library Service

Molecular sieves for improved hydrocarbon traps

Davis, Mark E. and Okubo, Tatsuya (2010) Molecular sieves for improved hydrocarbon traps. Patent number: US7858059B2.

[img] PDF (U.S. patent US7858059B2) - Published Version
See Usage Policy.

[img] PDF (European patent EP1732842B1) - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Molecular sieves and the use of such materials as hydrocarbon traps, particularly for reducing the emissions associated with the combustion of hydrocarbon fuels are described. Specifically, the use of molecular sieves such as zeolites as adsorbents for hydrocarbon gases, especially exhaust gases such as are formed during the combustion of hydrocarbons, and more particularly to the adsorption of hydrocarbon gases formed during the cold start operation of an internal combustion engine is described. In one embodiment, a method of treating exhaust gas that comprises a hydrocarbon combustion product is provided, the method comprising contacting the exhaust gas with a CON topology molecular sieve for a time period effective to facilitate adsorption of the hydrocarbon combustion product by the molecular sieve; passing a purge gas through the molecular sieve to remove adsorbed hydrocarbon combustion product; and contacting the purge gas containing the removed hydrocarbon combustion product with a hydrocarbon conversion catalyst.

Item Type:Patent
Related Patents:EP1732842B1, JP4847876B2
Patent Classification:Current U.S. Class: 423/213.2; 423/212; 423/213.5. Current CPC Class: B01D 53/02 (20130101); F01N 3/0835 (20130101); F01N 3/0871 (20130101); B01D 2253/108 (20130101); B01D 2253/30 (20130101); B01D 2257/702 (20130101); B01D 2258/01 (20130101); Y02T 10/20 (20130101); F01N 3/0814 (20130101); F01N 3/30 (20130101); F01N 2570/12 (20130101); B01D 2259/40086 (20130101). Current International Class: B01D 53/56 (20060101).
Patent Assignee:California Institute of Technology
Related URLs:
URLURL TypeDescription Patents site Patent Office
Davis, Mark E.0000-0001-8294-1477
Additional Information:US Grant. Application number US11040527. Priority date 2004-02-02. Filing date 2005-01-21. Publication date 2010-12-28. Grant date 2010-12-28. Parent Case Text: This application claims priority under 35 U.S.C. .sctn.119(e)(1) to U.S. Provisional Patent Application Ser. No. 60/541,109, filed Feb. 2, 2004 and to U.S. Provisional Patent Application Ser. No. 60/555,647, filed Mar. 22, 2004. The disclosures of the aforementioned applications are incorporated by reference in their entireties.
Non-Subject Keywords:Nanotechnology ; Chemical ; Engineering, general
Record Number:CaltechAUTHORS:20171025-152210869
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82676
Deposited By: Katherine Johnson
Deposited On:25 Oct 2017 22:46
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page