US5804155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic zeolites as hydrocarbon traps for diesel oxidation catalysts
Assignee: BASF Catalysts LLC
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Filing: 1995-12-18
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Granted: 1998-09-08
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Expires: 2015-12-18
Abstract
Abstract The present invention relates to a composition comprising at least one zeolite consisting essentially of the zeolites selected from the group of neutral and basic zeolites and at least one platinum group metal component. This composition has been found to be useful in a method of treating gas streams comprising hydrocarbons comprising the steps of adsorbing the hydrocarbons on the recited zeolites at a low adsorption temperature range, releasing the hydrocarbons from the zeolite at a high release temperature range and oxidizing the hydrocarbons.
Inventors
- 👤 Robert J. Farrauto
- 👤 Michel Deeba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:08
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01J; B01J37/00; B01J37/02; B01J37/024; B01J37/0246; B01D53/944; B01D53/9481; B01D53/9486; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/63; B01J29/00; B01J29/04; B01J29/06; B01J29/064; B01J29/068; B01J35/00; B01J35/60; B01J37/0215; B01J37/0244; B01D2253/00; B01D2253/10; B01D2253/106; B01D2253/108; B01D2255/00; B01D2255/10; B01D2255/102; B01J29/70; B01J29/72; B01J29/7215; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
43 words
A method of treating gas streams comprising hydrocarbons comprising the steps of: adsorbing the hydrocarbons on to basic magnesium Beta zeolites at a low adsorption temperature range; releasing the hydrocarbons from the zeolite at a high release temperature range; catalytically oxidizing the hydrocarbons.
Claim 2
Independent Claim
43 words
A method of treating gas streams comprising hydrocarbons comprising the steps of: adsorbing the hydrocarbons on to basic magnesium Beta zeolites at a low adsorption temperature range; releasing the hydrocarbons from the zeolite at a high release temperature range; catalytically oxidizing the hydrocarbons.
Claim 3
Dependent Claim
15 words
The method as recited in claim 1 wherein the zeolite has substantially no cracking activity.
Claim 4
Independent Claim
60 words
A method of treating diesel engine exhaust gas streams comprising hydrocarbons comprising the steps of: feeding the diesel engine exhaust gas stream to a composition comprising basic magnesium Beta zeolites; adsorbing the hydrocarbons on to the zeolite at a low adsorption temperature range; releasing the hydrocarbons from the zeolite at a high release temperature range; and catalytically oxidizing the hydrocarbons.
Claim 5
Independent Claim
60 words
A method of treating diesel engine exhaust gas streams comprising hydrocarbons comprising the steps of: feeding the diesel engine exhaust gas stream to a composition comprising basic magnesium Beta zeolites; adsorbing the hydrocarbons on to the zeolite at a low adsorption temperature range; releasing the hydrocarbons from the zeolite at a high release temperature range; and catalytically oxidizing the hydrocarbons.
Claim 6
Dependent Claim
15 words
The method as recited in claim 3 wherein the zeolite has substantially no cracking activity.
Claim 7
Dependent Claim
18 words
The method as recited in claim 3 wherein the low temperature adsorption range is below about 200 C.
Claim 8
Dependent Claim
19 words
The method as recited in claim 5 wherein the hydrocarbons oxidize at a temperature of at least 200 C.
Claim 9
Dependent Claim
18 words
The method as recited in claim 3 wherein the high temperature release range is above about 150 C.
Claim 10
Dependent Claim
18 words
The method as recited in claim 7 wherein the high temperature release range is above about 200 C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-07 | 2002-03-09 | 2002-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-07 | 2006-03-09 | 2006-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-07 | 2010-03-09 | 2010-09-08 | $7700.00 | Window Closed / Lapsed |