Patent US3236905A successfully refreshed from Google Patents.
US3236905A
Expired / Lapsed
US
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Preparing acetylene and ethylene
Assignee: Toyo Koatsu Industries Inc
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Filing: 1961-09-11
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Granted: 1966-02-22
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Otsuka Eiji
- 👤 Watanabe Hiroo
- 👤 Takada Minoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:07
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/76; C07C2/82; C07C2/78; C07C4/00; C07C4/02; C07C4/04; C10; C10G; C10G9/00; C10G9/34; C10G9/36; C10G9/38; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/91; Y10S585/949; Y10S585/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A METHOD FOR PRODUCING ACETYLENE AND ETHYLENE WHEREIN A HYDROCARBON HAVING FROM ONE TO FIVE CARBON ATOMS IS PARTIALLY OXIDIZED AT A TEMPERATURE ABOVE ABOUT 1300*C. TO PROVIDE A GASEOUS PRODUCT, THE IMPROVEMENT WHICH COMPRISES SUBJECTING SAID GASEOUS PRODUCT TO A PRIMARY QUENCHING STEP UTILIZING A LIGHT DISTILLATE OIL WHEREIN THE TEMPERATURE OF SAID GASEOUS PRODUCT IS REDUCED TO BETWEEN ABOUT 500* AND 1100*C. AND SAID LIGHT OIL IS PYROLYZED, SUBJECTING SAID GASEOUS PRODUCT TO A SECONDARY QUENCHING STEP UTILIZING A RAW CRUDE OIL WHEREIN THE TEMPERATURE OF SAID GASEOUS PRODUCT IS FURTHER REDUCED TO BETWEEN ABOUT 150* AND 200*C. AND SAID CRUDE OIL IS FRACTIONATED TO PROVIDE A GASEOUS LIGHT DISTILLATE OIL AND A HEAVY OIL RESIDUE, CONDENSING SAID GASEOUS LIGHT DISTILLATE OIL BY SCRUBBING WITH WATER AND RECYCLING THE CONDENSATE FOR USE IN THE PRIMARY QUENCHNG STEP.
Claim 2
Dependent Claim
140 words
IN A METHOD FOR PRODUCING ACETYLENE AND ETHYLENE WHEREIN A HYDROCARBON HAVING FROM ONE TO FIVE CARBON ATOMS IS PARTIALLY OXIDIZED AT A TEMPERATURE ABOVE ABOUT 1300*C. TO PROVIDE A GASEOUS PRODUCT, THE IMPROVEMENT WHICH COMPRISES SUBJECTING SAID GASEOUS PRODUCT TO A PRIMARY QUENCHING STEP UTILIZING A LIGHT DISTILLATE OIL WHEREIN THE TEMPERATURE OF SAID GASEOUS PRODUCT IS REDUCED TO BETWEEN ABOUT 500* AND 1100*C. AND SAID LIGHT OIL IS PYROLYZED, SUBJECTING SAID GASEOUS PRODUCT TO A SECONDARY QUENCHING STEP UTILIZING A RAW CRUDE OIL WHEREIN THE TEMPERATURE OF SAID GASEOUS PRODUCT IS FURTHER REDUCED TO BETWEEN ABOUT 150* AND 200*C. AND SAID CRUDE OIL IS FRACTIONATED TO PROVIDE A GASEOUS LIGHT DISTILLATE OIL AND A HEAVY OIL RESIDUE, CONDENSING SAID GASEOUS LIGHT DISTILLATE OIL BY SCRUBBING WITH WATER AND RECYCLING THE CONDENSATE FOR USE IN THE PRIMARY QUENCHNG STEP.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |