US2726271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting polychloro-benzenes
Assignee: Olin Corp
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Filing: 1951-10-18
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Granted: 1955-12-06
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Expires: 1971-10-18
Abstract
No abstract record available.
Inventors
- 👤 James E Troyan
- 👤 Walter W Northgraves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:52
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR THE PARTIAL DECHLORINATION OF A MIXTURE OF POLYCHLOROBENZENES HAVING AT LEAST FOUR CHLORINE ATOMS PER MOLECULE COMPRISING PREDOMINANTLY POLYCHLOROBENZENES SELECTED FROM THE CLASS CONSISTING OF CICINAL TETRACHLOROBENZENE AND PENTACHLOROBENZENE AND IN WHICH AT LEAST PART OF THE VICINAL TETRACHLOROBENZENE IS CONVERTED TO 1,2,4-TRICHLOROBENZENE AND AT LEAST PART OF THE PENTACHLOROBENZENE IS CONVERTED TO 1,2,4,5-TETRACHLOROBENZENE WHICH COMPRISES VAPORIZING THE POLYCHLOROBENZENE FEED, ADMIXING THE POLYCHLOROBENZENE VAPORS WITH STEAM IN A WEIGHT RATIO OF POLYCHLOROBENZENE VAPORS WITH STEAM IN A OF ABOUT 1:0.05 TO 1:10, AND PASSING THE VAPOR MIXTURE OVER A CATALYST COMPRISING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF COPPER OXIDES AND COPPER CHLORIDES AT A TEMPERATURE IN THE RANGE OF ABOUT 350* TO 500* C.
Claim 2
Dependent Claim
119 words
A PROCESS FOR THE PARTIAL DECHLORINATION OF A MIXTURE OF POLYCHLOROBENZENES HAVING AT LEAST FOUR CHLORINE ATOMS PER MOLECULE COMPRISING PREDOMINANTLY POLYCHLOROBENZENES SELECTED FROM THE CLASS CONSISTING OF CICINAL TETRACHLOROBENZENE AND PENTACHLOROBENZENE AND IN WHICH AT LEAST PART OF THE VICINAL TETRACHLOROBENZENE IS CONVERTED TO 1,2,4-TRICHLOROBENZENE AND AT LEAST PART OF THE PENTACHLOROBENZENE IS CONVERTED TO 1,2,4,5-TETRACHLOROBENZENE WHICH COMPRISES VAPORIZING THE POLYCHLOROBENZENE FEED, ADMIXING THE POLYCHLOROBENZENE VAPORS WITH STEAM IN A WEIGHT RATIO OF POLYCHLOROBENZENE VAPORS WITH STEAM IN A OF ABOUT 1:0.05 TO 1:10, AND PASSING THE VAPOR MIXTURE OVER A CATALYST COMPRISING A MATERIAL SELECTED FROM THE CLASS CONSISTING OF COPPER OXIDES AND COPPER CHLORIDES AT A TEMPERATURE IN THE RANGE OF ABOUT 350* TO 500* C.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |