US2762850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride production
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-09-06
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Granted: 1956-09-11
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Expires: 1971-09-06
Abstract
No abstract record available.
Inventors
- 👤 Robert E Lenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25; B; B01; B01J; B01J2219/00; B01J2219/00002; B01J2219/00004; B01J2219/00006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE PROCESS WHICH COMPRISES PYROLYZING ETHYLENE DICHLORIDE TO PRODUCE A PYROLYSIS PRODUCT COMPRISING VINYL CHLORIDE AND GASEOUS HYDROGEN CHLORIDE, SCRUBBING SAID PYROLYSIS PRODUCT WITH ETHYLENE DICHLORIDE IN A FIRST SCRUBBING ZONE TO SEPARATE A MAJOR PORTION OF SAID HYDROGEN CHLORIDE THEREFROM AND FORM A FIRST SOLUTION CONTAINING VINYL CHLORIDE TOGETHER WITH A MINOR PROPORTION OF HYDROGEN CHLORIDE, MIXING ACETYLENE WITH SAID GASEOUS HYDROGEN CHLORIDE AND SUBJECTING SAID MIXTURE TO CATALYTIC HYDROCHLORINATION TO FORM A GASEOUS MIXTURE CONTAINING VINYL CHLORIDE, SCRUBBING SAID GASEOUS MIXTURE WITH ETHYLENE DICHLORIDE IN A SECOND SCRUBBING ZONE WHEREBY SAID VINYL CHLORIDE IS DISSOLVED, COMBINING SAID FIRST-FORMED ETHYLENE DICHLORIDE SOLUTION WITH SAID SECONDFORMED SOLUTION, SUBJECTING SAID COMBINED SOLUTION TO A TEMPERATURE WHEREBY A MIXTURE OF HYDROGEN CHLORIDE AND VINYL CHLORIDE IS LIBERATED, PASSING SAID MIXTURE TO SAID FIRST SCRUBBING ZONE WHEREIN ITS COMPONENTS ARE SEPARATED AND FRACTIONALLY DISRILLING THE REMAINING VINYL CHLORIDE FROM SAID COMBINED ETHYLENE DICHLORIDE SOLUTION.
Claim 2
Dependent Claim
151 words
THE PROCESS WHICH COMPRISES PYROLYZING ETHYLENE DICHLORIDE TO PRODUCE A PYROLYSIS PRODUCT COMPRISING VINYL CHLORIDE AND GASEOUS HYDROGEN CHLORIDE, SCRUBBING SAID PYROLYSIS PRODUCT WITH ETHYLENE DICHLORIDE IN A FIRST SCRUBBING ZONE TO SEPARATE A MAJOR PORTION OF SAID HYDROGEN CHLORIDE THEREFROM AND FORM A FIRST SOLUTION CONTAINING VINYL CHLORIDE TOGETHER WITH A MINOR PROPORTION OF HYDROGEN CHLORIDE, MIXING ACETYLENE WITH SAID GASEOUS HYDROGEN CHLORIDE AND SUBJECTING SAID MIXTURE TO CATALYTIC HYDROCHLORINATION TO FORM A GASEOUS MIXTURE CONTAINING VINYL CHLORIDE, SCRUBBING SAID GASEOUS MIXTURE WITH ETHYLENE DICHLORIDE IN A SECOND SCRUBBING ZONE WHEREBY SAID VINYL CHLORIDE IS DISSOLVED, COMBINING SAID FIRST-FORMED ETHYLENE DICHLORIDE SOLUTION WITH SAID SECONDFORMED SOLUTION, SUBJECTING SAID COMBINED SOLUTION TO A TEMPERATURE WHEREBY A MIXTURE OF HYDROGEN CHLORIDE AND VINYL CHLORIDE IS LIBERATED, PASSING SAID MIXTURE TO SAID FIRST SCRUBBING ZONE WHEREIN ITS COMPONENTS ARE SEPARATED AND FRACTIONALLY DISRILLING THE REMAINING VINYL CHLORIDE FROM SAID COMBINED ETHYLENE DICHLORIDE SOLUTION.
References Cited (Backward Citations)
GB573594A
Cited
US2523747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |