US4392004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of cyclopentadiene from isoprene streams
Assignee: Goodyear Tire and Rubber Co
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Filing: 1982-02-22
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Granted: 1983-07-05
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Expires: 2002-02-22
Abstract
Abstract A process for reducing the level of cyclopentadiene present in a hydrocarbon stream containing isoprene and cyclopentadiene which involves contacting the stream with a base wherein said base is selected from the group consisting of potassium hydroxide, sodium hydroxide and potassium fluoride. The base is situated on activated carbon carrier.
Inventors
- 👤 Richard M. D'Sidocky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:19
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/14833; C07C7/1485
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
62 words
A process for the removal of small amounts of CPD from a C-5 hydrocarbon stream containing isoprene comprising contacting said stream with an LHSV value of from 0.5 to 30 and a temperature of from 0° C. to 100° C. with a base on an activated carbon carrier wherein said base is selected form the group consisting of KOH, NaOH and KF.
Claim 2
Dependent Claim
62 words
A process for the removal of small amounts of CPD from a C-5 hydrocarbon stream containing isoprene comprising contacting said stream with an LHSV value of from 0.5 to 30 and a temperature of from 0° C. to 100° C. with a base on an activated carbon carrier wherein said base is selected form the group consisting of KOH, NaOH and KF.
Claim 3
Dependent Claim
12 words
A process as claimed in claim 1 wherein said base is KOH.
Claim 4
Dependent Claim
12 words
A process as claimed in claim 1 wherein said base is NaOH.
Claim 5
Dependent Claim
12 words
A process as claimed in claim 1 wherein said base is KF.
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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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |