US2880252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conversion of aliphatic hydrocarbons to aromatic hydrocarbons
Assignee: Shell Development Co
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Filing: 1955-02-18
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Granted: 1959-03-31
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Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 John H Raley
- 👤 Richard D Mullineaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:05
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR THE CONVERSION OF AN ALIPHATIC HYDROCARBON WHICH CONTAINS A CHAIN OF AT LEAST FOUR CARBON ATOMS AND IN WHICH THE SUM OF (1) THE TOTAL NUMBER OF CARBON ATOMS IN THE CHAIN PLUS (2) THE NUMBER OF QUATERNARY CARBON ATOMS IN THE CHAIN IS AT LEAST SIX AND THE LONGEST CHAIN CONTAINS NO MORE THAN FIVE CONTIGUOUS NON-QUATERNARY CARBON ATOMS INTO AN AROMATIC HYDROCARBON CONTAINING NO QUATERNARY CARBON ATOM, WHICH COMPRISES SUBJECTING A MIXTURE OF SAID HYDROCARBON AND AT LEAST ABOUT 0.3 MOLE OF IODINE PER MOLE OF HYDROCARBON IN VAPOR PHASE FOR A TIME OF FROM 0.01 SECOND TO FIVE MINUTES TO A TEMPERATURE OF AT LEAST 300*C. TO EFFECT A BOND CLEAVAGE IN THE HYDROCARBON IN THE PRESENCE OF FREE IODINE AND CONVERT A QUATERNARY CARBON ATOM OF THE HYDROCARBON TO A NON-QUATERNARY CARBON ATOM, AND RECOVERING AN AROMATIC HYDROCARBON PRODUCT.
Claim 2
Dependent Claim
146 words
A PROCESS FOR THE CONVERSION OF AN ALIPHATIC HYDROCARBON WHICH CONTAINS A CHAIN OF AT LEAST FOUR CARBON ATOMS AND IN WHICH THE SUM OF (1) THE TOTAL NUMBER OF CARBON ATOMS IN THE CHAIN PLUS (2) THE NUMBER OF QUATERNARY CARBON ATOMS IN THE CHAIN IS AT LEAST SIX AND THE LONGEST CHAIN CONTAINS NO MORE THAN FIVE CONTIGUOUS NON-QUATERNARY CARBON ATOMS INTO AN AROMATIC HYDROCARBON CONTAINING NO QUATERNARY CARBON ATOM, WHICH COMPRISES SUBJECTING A MIXTURE OF SAID HYDROCARBON AND AT LEAST ABOUT 0.3 MOLE OF IODINE PER MOLE OF HYDROCARBON IN VAPOR PHASE FOR A TIME OF FROM 0.01 SECOND TO FIVE MINUTES TO A TEMPERATURE OF AT LEAST 300*C. TO EFFECT A BOND CLEAVAGE IN THE HYDROCARBON IN THE PRESENCE OF FREE IODINE AND CONVERT A QUATERNARY CARBON ATOM OF THE HYDROCARBON TO A NON-QUATERNARY CARBON ATOM, AND RECOVERING AN AROMATIC HYDROCARBON PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |