US3341288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of chlorine dioxide
Assignee: Hooker Chemical Corp
•
Filing: 1963-12-27
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Granted: 1967-09-12
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Expires: 1983-12-27
Abstract
No abstract record available.
Inventors
- 👤 Partridge Harold Devere
- 👤 Edward S Atkinson
- 👤 Herbert C Scribner
- 👤 Rapson William Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:12
CPC Classifications
C; C01; C01D; C01D5/00; C01D5/02; C01B; C01B11/00; C01B11/02; C01B11/022; C01B11/023; C01B11/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE AND THE RECOVERY OF HYDRATED SODIUM SULPHATE WHICH COMPRISES MAINTAINING A REACTION ZONE FOR THE PRODUCTION OF CHLORINE DIOXIDE AND A CRYSTALLIZATION ZONE FOR THE CRYSTALLIZATION OF HYDRATED SODIUM SULPHATE, ADDING SODIUM CHLORIDE, SODIUM CHLORATE, WATER AND LIQUID EFFLUENT FROM SAID REACTION ZONE TO SAID CRYSTALLIZATION ZONE, MAINTAINING THE SOLUTION IN SAID CRYSTALLIZATION ZONE ATEMPERATURE SUFFICIENTLY LOW TO CRYSTALLIZE HYDRATED SODIUM SULPHATE THEREFROM, RECOVERING SAID HYDRATED SODIUM SULPHATE FROM THE CRYSTALLIZATION LIQUOR, CONDUCTING THE LIQUOR REMAINING AFTER THE RECOVERY OF SAID HYDRATED SODIUM SULPHATE TO SAID REACTION ZONE, ADDING SULPHURIC ACID TO SAID RECATION ZONE, GENERATING CHORINE DIOXIDE AND CHLORINE FROM THE REACTION MIXTURE IN SAID REACTION ZONE, REMOVING SAID CHLORINE DIOXIDE AND SAID CHLORINE GASES FROM SAID REACTION ZONE, CONDUCTING THE LIQUID EFFLUENT FROM SAID REACTION ZONE TO SAID CRYSTALLIZATION ZONE, AND REMOVING WATER FROM SAID REACTION ZONE TO MAINTAIN THE ACID CONCENTRATION IN THE REACTION ZONE IN EXCESS OF THAT IN THE CRYSTALLIZATION ZONE, THE AMOUNT OF WATER ADDED TO SAID CRYSTALLIZATION ZONE BEING SUFFICIENT TO RESULT TO CRYSTALLIZATION OF HYDRATED SODIUM SULPHATE.
Claim 2
Dependent Claim
183 words
A PROCESS FOR THE PRODUCTION OF CHLORINE DIOXIDE AND THE RECOVERY OF HYDRATED SODIUM SULPHATE WHICH COMPRISES MAINTAINING A REACTION ZONE FOR THE PRODUCTION OF CHLORINE DIOXIDE AND A CRYSTALLIZATION ZONE FOR THE CRYSTALLIZATION OF HYDRATED SODIUM SULPHATE, ADDING SODIUM CHLORIDE, SODIUM CHLORATE, WATER AND LIQUID EFFLUENT FROM SAID REACTION ZONE TO SAID CRYSTALLIZATION ZONE, MAINTAINING THE SOLUTION IN SAID CRYSTALLIZATION ZONE ATEMPERATURE SUFFICIENTLY LOW TO CRYSTALLIZE HYDRATED SODIUM SULPHATE THEREFROM, RECOVERING SAID HYDRATED SODIUM SULPHATE FROM THE CRYSTALLIZATION LIQUOR, CONDUCTING THE LIQUOR REMAINING AFTER THE RECOVERY OF SAID HYDRATED SODIUM SULPHATE TO SAID REACTION ZONE, ADDING SULPHURIC ACID TO SAID RECATION ZONE, GENERATING CHORINE DIOXIDE AND CHLORINE FROM THE REACTION MIXTURE IN SAID REACTION ZONE, REMOVING SAID CHLORINE DIOXIDE AND SAID CHLORINE GASES FROM SAID REACTION ZONE, CONDUCTING THE LIQUID EFFLUENT FROM SAID REACTION ZONE TO SAID CRYSTALLIZATION ZONE, AND REMOVING WATER FROM SAID REACTION ZONE TO MAINTAIN THE ACID CONCENTRATION IN THE REACTION ZONE IN EXCESS OF THAT IN THE CRYSTALLIZATION ZONE, THE AMOUNT OF WATER ADDED TO SAID CRYSTALLIZATION ZONE BEING SUFFICIENT TO RESULT TO CRYSTALLIZATION OF HYDRATED SODIUM SULPHATE.
References Cited (Backward Citations)
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US2086902A
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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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |