US3585253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkylaryl sulfonates including the step of dehydrogenating normal paraffins with improved catalyst
Assignee: Monsanto Co
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Filing: 1968-03-22
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Granted: 1971-06-15
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Expires: 1988-03-22
Abstract
Abstract METHODS FOR PREPARING DETERGENT TYPE ALKYLARYL SULFONATES INCLUDING THE STEPS OF SEPARATING NORMAL PARAFFINS FROM A PETROLEUM FRACTION, DEHYDROGENATING THE NORMAL PARAFFINS TO FORM MONO-OLEFINS, REACTING THE MONO-OLEFINS WITH A MONOCYCLIC ARYL COMPOUND SUCH AS BENZENE AND SULFONATING THE RESULTING ALKYLARYL HYDROCARBONS. NOVEL DEHYDROGENATION CATALYSTS COMPRISING ONE OR MORE GROUP I-B METALS, SUCH AS COPPER, AND ONE OR MORE NOBLE METALS OF THE PLATINUM OR PALLADIUM FAMILIES DEPOSITED UPON LOW ACIDITY ALUMINA ARE EMPLOYED FOR THE DEHYDROGENATION OF N-PARAFFINS. THE PROCEDURE USING SUCH NOVEL CATLYSTS RESULTS IN IMPROVED CONVERSIONS AND THE PRODUCTION OF A PURER PRODUCT.
Inventors
- 👤 Shuan K Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:28
CPC Classifications
C; C07; C07C; C07C309/00; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C5/3335; C07C5/3337
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |