US3365508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzene alkylation with chloroparaffins
Assignee: Vista Chemical Co
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Filing: 1965-03-15
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Granted: 1968-01-23
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Kapur Brij Lal
- 👤 Buddy D Ratliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:52
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/86; C07C2/861; C07C15/00; C07C15/02; C07C15/107; C07C7/00; C07C7/148; C07C7/17; C07C7/171; C07C2527/00; C07C2527/06; C07C2527/125; C07C2527/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN THE ALKYLATION PROCESS WHERE RAW N-PARAFFINS ARE CHLORINATED TO OBTAIN A MIXTURE OF N-PARAFFINS AND CHLOROPARAFFINS HAVING ESSENTIALLY ONLY ONE CHLORINE ATOM PER PARAFFIN MOLECULE; SAID MIXTURE IS REACTED WITH BENZENE IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST TO PRODUCE LINEAR ALKYLBENZENE, A SUBSTANTIAL AMOUNT OF UNREACTED CHLOROHYDROCARBONS, UNREACTED BENZENE AND N-PARAFFINS; AND THE ALKYLATION PRODUCT IS DISTILLED TO SEPARATE N-PARAFFINS AND UNREACTED BENZENE WHICH CONSTITUENTS ARE RECYCLED TO THE APPROPRIATE OPERATION; THE IMPROVEMENT WHICH COMPRISES TREATING RAW N-PARAFFIN WITH OLEUM IN AN AMOUNT OF ABOUT 5-50 WEIGHT PERCENT BASED ON RAW PARAFFIN AT A TEMPERATURE OF ABOUT 70*-150*F., NEUTRALIZING THE TREATED PARAFFIN AND CHARGING SAID NEUTRAL PARAFFIN TO SAID CHLORINATION OPERATION, SAID NEUTRAL PARAFFIN FEED AFFORDING CHLOROHYDROCARBONS THAT ARE ESSENTIALLY COMPLETELY REACTED IN SAID ALKYLATION OPERATION.
Claim 2
Dependent Claim
128 words
IN THE ALKYLATION PROCESS WHERE RAW N-PARAFFINS ARE CHLORINATED TO OBTAIN A MIXTURE OF N-PARAFFINS AND CHLOROPARAFFINS HAVING ESSENTIALLY ONLY ONE CHLORINE ATOM PER PARAFFIN MOLECULE; SAID MIXTURE IS REACTED WITH BENZENE IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST TO PRODUCE LINEAR ALKYLBENZENE, A SUBSTANTIAL AMOUNT OF UNREACTED CHLOROHYDROCARBONS, UNREACTED BENZENE AND N-PARAFFINS; AND THE ALKYLATION PRODUCT IS DISTILLED TO SEPARATE N-PARAFFINS AND UNREACTED BENZENE WHICH CONSTITUENTS ARE RECYCLED TO THE APPROPRIATE OPERATION; THE IMPROVEMENT WHICH COMPRISES TREATING RAW N-PARAFFIN WITH OLEUM IN AN AMOUNT OF ABOUT 5-50 WEIGHT PERCENT BASED ON RAW PARAFFIN AT A TEMPERATURE OF ABOUT 70*-150*F., NEUTRALIZING THE TREATED PARAFFIN AND CHARGING SAID NEUTRAL PARAFFIN TO SAID CHLORINATION OPERATION, SAID NEUTRAL PARAFFIN FEED AFFORDING CHLOROHYDROCARBONS THAT ARE ESSENTIALLY COMPLETELY REACTED IN SAID ALKYLATION OPERATION.
References Cited (Backward Citations)
US3322843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |