US2553518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of organic bromides
Assignee: Dow Chemical Co
•
Filing: 1948-02-12
•
Granted: 1951-05-15
•
Expires: 1968-02-12
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Lake
- 👤 Arthur A Asadorian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:20
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; C07B; C07B39/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A METHOD FOR REMOVING CHLORINE FROM A CHLORINATED ORGANIC COMPOUND AND REPLACING THE CHLORINE WITH BROMINE WHICH COMPRISES FORMING A MIXTURE OF HYDROGEN BROMIDE AND A LIQUID CHLORINE-CONTAINING ORGANIC COMPOUND THAT IS FREE OF FUNCTIONAL GROUPS OTHER THAN HALOGEN ATOMS, CARBONYL GROUPS, CARBOXY RADICALS AND ACYL HALIDE RADICALS, REMAINS AT LEAST 95 PER CENT UNPOLYMERIZED WHEN ADMIXED WITH 5 MOLE PER CENT OF ALUMINUM CHLORIDE, ALCL3, AT TEMPERATURES BETWEEN 0* AND 90* C. FOR 1 HOUR, AND DOES NOT UNDERGO DEHYDROHALOGENATION TO FORM A MORE READILY POLYMERIZABLE UNSATURATED ORGANIC COMPOUND UNDER THE CONDITIONS JUST STATED, AND CONTACTING THE MIXTURE OF HYDROGEN BROMIDE AND SAID LIQUID CHLORINE-CONTAINING ORGANIC COMPOUND WITH A METAL HALIDE OF THE GROUP CONSISTING OF THE CHLORIDES AND BROMIDES OF ALUMINUM AND BORON WHILE MAINTAINING THE MIXTURE AT REACTION TEMPERATURES BELOW THAT AT WHICH THE BROMINATED ORGANIC PRODUCT IS DECOMPOSED.
Claim 2
Independent Claim
142 words
A METHOD FOR REMOVING CHLORINE FROM A CHLORINATED ORGANIC COMPOUND AND REPLACING THE CHLORINE WITH BROMINE WHICH COMPRISES FORMING A MIXTURE OF HYDROGEN BROMIDE AND A LIQUID CHLORINE-CONTAINING ORGANIC COMPOUND THAT IS FREE OF FUNCTIONAL GROUPS OTHER THAN HALOGEN ATOMS, CARBONYL GROUPS, CARBOXY RADICALS AND ACYL HALIDE RADICALS, REMAINS AT LEAST 95 PER CENT UNPOLYMERIZED WHEN ADMIXED WITH 5 MOLE PER CENT OF ALUMINUM CHLORIDE, ALCL3, AT TEMPERATURES BETWEEN 0* AND 90* C. FOR 1 HOUR, AND DOES NOT UNDERGO DEHYDROHALOGENATION TO FORM A MORE READILY POLYMERIZABLE UNSATURATED ORGANIC COMPOUND UNDER THE CONDITIONS JUST STATED, AND CONTACTING THE MIXTURE OF HYDROGEN BROMIDE AND SAID LIQUID CHLORINE-CONTAINING ORGANIC COMPOUND WITH A METAL HALIDE OF THE GROUP CONSISTING OF THE CHLORIDES AND BROMIDES OF ALUMINUM AND BORON WHILE MAINTAINING THE MIXTURE AT REACTION TEMPERATURES BELOW THAT AT WHICH THE BROMINATED ORGANIC PRODUCT IS DECOMPOSED.
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |