US3911040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1974-06-10
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Granted: 1975-10-07
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Expires: 1994-06-10
Abstract
Abstract A method for the selective removal of 1,3-cyclopentadiene from hydrocarbon mixtures containing conjugated diolefins using polyester compounds containing maleate units.
Inventors
- 👤 James Reid Shelton
- 👤 Dale C Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:24
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
A METHOD OF SELECTIVELY REMOVING 1,3-CYCLOPENTADIENE FROM A HYDROCARBON MIXTURE CONTAINING 1,3-CYCLOPENTADIENE AND OTHER HYDROCARBONS, WHICH COMPRISES THE STEPS OF INTIMATELY CONTACTING SAAD HYDROCARBON MIXTURE CONTAINING 1,3CYCLOPENTADIENE WITH A POLYESTER COMPOUND CONTAINING A MALCATE UNIT, TO FORM AN ADDUCT OF 11,3-CYCLOPENTADIENE AND THE POLYESTER COMPOUND CONTAINING A MALEATE UNIT, AND SUBSEQUENTLY SEPARATING THE REMAINING HYDROCARBONS FROM THE ADDUCT.
Claim 2
Independent Claim
58 words
A METHOD OF SELECTIVELY REMOVING 1,3-CYCLOPENTADIENE FROM A HYDROCARBON MIXTURE CONTAINING 1,3-CYCLOPENTADIENE AND OTHER HYDROCARBONS, WHICH COMPRISES THE STEPS OF INTIMATELY CONTACTING SAAD HYDROCARBON MIXTURE CONTAINING 1,3CYCLOPENTADIENE WITH A POLYESTER COMPOUND CONTAINING A MALCATE UNIT, TO FORM AN ADDUCT OF 11,3-CYCLOPENTADIENE AND THE POLYESTER COMPOUND CONTAINING A MALEATE UNIT, AND SUBSEQUENTLY SEPARATING THE REMAINING HYDROCARBONS FROM THE ADDUCT.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein the contacting of said hydrocarbon mixture with the polyester compound is conducted at from 0* to 100*C.
Claim 4
Dependent Claim
27 words
A method according to claim 1 wherein the polyester compound after being contacted by the 1,3-cyclopentadiene is regenerated by heating up to 350*C. while purging with nitrogen.
References Cited (Backward Citations)
US3492366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |