US3864409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method For Vinyl Halides
Assignee: Individual
•
Filing: 1970-11-30
•
Granted: 1975-02-04
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Expires: 1990-11-30
Abstract
Abstract Vinyl halides are prepared by direct reaction of free radicals made by thermal or catalytic cracking of hydrocarbons with halogen or hydrogen halide.
Inventors
- 👤 Bill J Pope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:09
CPC Classifications
C; C07; C07C; C07C17/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A METHOD FOR THE PREPARATION OF VINYL HALIDES WHICH COMPRISES THERMALLY OR CATALYTICALLY CRACKING METHANE, ETHANE, PROPANE, BUTANE, NAPHTHA,OR NATURAL GAS AT A TEMPERATURE ABOVE 500*C. AND FOR A TIME SUFFICIENT TO PRODUCE ACETYLENE PRECURSOR FREE RADICALS AND QUENCHING THE CRACKED PRODUCT WITH A HALOGEN OR HYROGEN HALIDE TO A TEMPERATURE BELWO 400*C.
Claim 2
Independent Claim
53 words
A METHOD FOR THE PREPARATION OF VINYL HALIDES WHICH COMPRISES THERMALLY OR CATALYTICALLY CRACKING METHANE, ETHANE, PROPANE, BUTANE, NAPHTHA,OR NATURAL GAS AT A TEMPERATURE ABOVE 500*C. AND FOR A TIME SUFFICIENT TO PRODUCE ACETYLENE PRECURSOR FREE RADICALS AND QUENCHING THE CRACKED PRODUCT WITH A HALOGEN OR HYROGEN HALIDE TO A TEMPERATURE BELWO 400*C.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the hydrocarbon is cracked at about 1550*C.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein the cracked mixture is quenched with halogen or hydrogen halide in admixture with uncracked hydrocarbon.
Claim 5
Dependent Claim
25 words
A method according to claim 1 wherein the cracked mixture is quenched with halogen or hydrogen halide in admixture with a quench gas containing hydrogen.
Claim 6
Dependent Claim
13 words
A method according to claim 1 wherein the hydrogen halide is hydrogen chloride.
Claim 7
Dependent Claim
101 words
A cyclic method for the preparation of vinyl halides which comprises thermally or catalytically cracking methane, ethane, propane, butane, naphtha, or natural gas at a temperature above 500*C. and for a time sufficient to produce acetylene precursor free radicals, queNching the cracked product with halogen or hydrogen halide in admixture with a quench gas to a temperature below 400*C., further cooking the quenched gas mixture and separating the resultant vinyl halide in a separation zone, returning the overhead from the separation zone to the quenching zone and returning a portion of the bottoms from the separation zone to the cracking zone.
Claim 8
Dependent Claim
101 words
A cyclic method for the preparation of vinyl halides which comprises thermally or catalytically cracking methane, ethane, propane, butane, naphtha, or natural gas at a temperature above 500*C. and for a time sufficient to produce acetylene precursor free radicals, queNching the cracked product with halogen or hydrogen halide in admixture with a quench gas to a temperature below 400*C., further cooking the quenched gas mixture and separating the resultant vinyl halide in a separation zone, returning the overhead from the separation zone to the quenching zone and returning a portion of the bottoms from the separation zone to the cracking zone.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |