US2674569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of benzene hexachloride by steam distillation
Assignee: Imperial Chemical Industries Ltd
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Filing: 1946-04-30
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Granted: 1954-04-06
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Expires: 1966-04-30
Abstract
No abstract record available.
Inventors
- 👤 Burrage Leslie James
- 👤 Beveridge Catherine Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:56
CPC Classifications
C; C07; C07C; C07C23/00; C07C23/02; C07C23/10; C07C23/12; C07C17/00; C07C17/38; C07C17/383; C07C17/386
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PRODUCTION OF BENZENE HEXACHLORIDE WITH DIMINISHED ODOUR WHICH COMPRISES ADDING A SLURRY OF CRUDE BENZENE HEXACHLORIDE IN BENZENE, OBTAINED DIRECTLY BY THE ADDITIVE CHLORINATION OF BENZENE IN THE PRESENCE OF ACTINIC RADIATION, TO WATER MAINTAINED AT A TEMPERATURE APPROXIMATING TO ITS BOILING POINT, WHEREBY THE BENZENE IS RAPIDLY VAPORIZED, AND SUBJECTING THE RESULTANT AQUEOUS SUSPENSION OF CRUDE BENZENE HEXACHLORIDE TO STEAM DISTILLATION FOR A PERIOD OF 2 TO 3 HOURS.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PRODUCTION OF BENZENE HEXACHLORIDE WITH DIMINISHED ODOUR WHICH COMPRISES ADDING A SLURRY OF CRUDE BENZENE HEXACHLORIDE IN BENZENE, OBTAINED DIRECTLY BY THE ADDITIVE CHLORINATION OF BENZENE IN THE PRESENCE OF ACTINIC RADIATION, TO WATER MAINTAINED AT A TEMPERATURE APPROXIMATING TO ITS BOILING POINT, WHEREBY THE BENZENE IS RAPIDLY VAPORIZED, AND SUBJECTING THE RESULTANT AQUEOUS SUSPENSION OF CRUDE BENZENE HEXACHLORIDE TO STEAM DISTILLATION FOR A PERIOD OF 2 TO 3 HOURS.
Claim 3
Dependent Claim
101 words
A PROCESS FOR THE PRODUCTION OF BENZENE HEXACHLORIDE WITH DIMINISHED ODOR WHICH INCLUDES THE STEP OF SUBJECTING TO STEAM DISTILLATION FOR A PERIOD OF BETWEEN 1 TO 6 HOURS AND AQUEOUS SUSPENSION OF A FINELY DIVIDED BENZENE HEXACHLORIDE FRACTION OF CRUDE BENZENE HEXACHLORIDE, SAID CRUDE BENZENE HEXACHLORIDE BEING THE TOTAL MIXTURE OF ISOMERS OBTAINED BY THE ADDITIVE CHLORINATION OF BENZENE IN THE PRESENCE OF ACTINIC RADIATION AND CONTAINING AT LEAST 10 PER CENT OF THE GAMMA ISOMER, AND SAID FRACTION OF CRUDE BENZENE HEXACHLORIDE HAVING AN ENHANCED GAMMA ISOMER CONTENT RELATIVE TO THE GAMMA ISOMER CONTENT OF SAID CRUDE BENZENE HEXACHLORIDE.
Claim 4
Dependent Claim
101 words
A PROCESS FOR THE PRODUCTION OF BENZENE HEXACHLORIDE WITH DIMINISHED ODOR WHICH INCLUDES THE STEP OF SUBJECTING TO STEAM DISTILLATION FOR A PERIOD OF BETWEEN 1 TO 6 HOURS AND AQUEOUS SUSPENSION OF A FINELY DIVIDED BENZENE HEXACHLORIDE FRACTION OF CRUDE BENZENE HEXACHLORIDE, SAID CRUDE BENZENE HEXACHLORIDE BEING THE TOTAL MIXTURE OF ISOMERS OBTAINED BY THE ADDITIVE CHLORINATION OF BENZENE IN THE PRESENCE OF ACTINIC RADIATION AND CONTAINING AT LEAST 10 PER CENT OF THE GAMMA ISOMER, AND SAID FRACTION OF CRUDE BENZENE HEXACHLORIDE HAVING AN ENHANCED GAMMA ISOMER CONTENT RELATIVE TO THE GAMMA ISOMER CONTENT OF SAID CRUDE BENZENE HEXACHLORIDE.
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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |