Patent US4351980A successfully refreshed from Google Patents.
US4351980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of olefin from aliphatic hydrocarbon by treatment with active solid
Assignee: Phillips Petroleum Co
•
Filing: 1979-05-22
•
Granted: 1982-09-28
•
Expires: 1999-05-22
Abstract
Abstract Hydrocarbon, suitable for use as propellant, is contacted with a solid effective to remove odor-forming impurity therefrom. Hydrocarbons include isobutene-containing stream also containing minor proportions of unsaturated hydrocarbon, e.g. ethylene, propylene, isobutylene, and 2-butenes. Solids include an acid montmorillonite clay, aluminum chloride, AlCl 3 ·HCl, AlCl 3 ·RCl, at least one metal of Groups I, II, and III of the periodic table, and supported H 3 PO 4 .
Inventors
- 👤 Robert E. Reusser
- 👤 Elizabeth A. Claytor
- 👤 Brenton E. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:11
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; C07; C07C; C07C7/00; C07C7/12; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y02P30/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
51 words
A process for the removal of a small amount of an odor-forming impurity of the order of a few parts per million from a low boiling isoparaffin hydrocarbon aerosol propellant for spray-type application which comprises contacting said hydrocarbon with a solid-acid treated montmorillonite clay catalyst effective to remove said odor-forming impurity.
Claim 2
Dependent Claim
51 words
A process for the removal of a small amount of an odor-forming impurity of the order of a few parts per million from a low boiling isoparaffin hydrocarbon aerosol propellant for spray-type application which comprises contacting said hydrocarbon with a solid-acid treated montmorillonite clay catalyst effective to remove said odor-forming impurity.
Claim 3
Dependent Claim
14 words
A process according to claim 1 wherein the low boiling isoparaffin hydrocarbon is isobutane.
Claim 4
Dependent Claim
47 words
A process according to claim 1 wherein said catalyst is a magnesium-substituted hydrogen montmorillonite having the approximate analysis ______________________________________
SiO.sub.2 71.2%
Al.sub.2 O.sub.3
16.5%
MgO 3.2%
Fe.sub.2 O.sub.3
3.6%
CaO 2.6%
SO.sub.3 1.3%
K.sub.2 O + Na.sub.2 O
1.0%
TiO.sub.2 0.6%
Acidity 5.0-8.0 mg KOH/gm sample
______________________________________
Claim 5
Dependent Claim
26 words
A process according to claim 3 wherein the acidity of the clay is in the approximate range of from about 5 to about 8 milligrams KOH/gm.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein the hydrocarbon is a low-boiling hydrocarbon containing a minor amount of at least one of the following: olefin, sulfide, mercaptan and oxygenated compounds.
Claim 7
Dependent Claim
23 words
A process according to claim 1 wherein the odor-forming impurity is at least one of the following: ethylene, propylene, isobutylene, n-butenes, and pentenes.
References Cited (Backward Citations)
US2899377A
Cited
US2564488A
Cited
US2626967A
Cited
US2842605A
Cited
US2856392A
Cited
US3409691A
Cited
US3394200A
Cited
US4028430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |