US3875253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenating normal paraffins
Assignee: Individual
•
Filing: 1969-09-23
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Granted: 1975-04-01
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Expires: 1989-09-23
Abstract
Abstract Detergent type alkylaryl sulfonates are prepared by 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 cobalt, zinc or mixtures, or oxides thereof 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 catalysts 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
2026-10-27 23:30
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/60; B01J23/70; B01J23/89; B01J23/8933; B01J23/8953; C07C15/00; C07C15/02; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C5/3335; C07C5/3337
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
A METHOD FOR PRODUCING MONO-OLEFINS FROM PARAFFINS WHICH COMPRISES PASSING A MIXTURE OF A PARAFFIN MATERIAL AND HYDROGEN AT A TEMPERATURE OF FROM ABOUT 400*C TO ABOUT 650*C INTO CONTACT WITH A CATALYST COMPRISING A FIRST METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF COBALT, ZINC. OXIDES THEREOF AND MIXTURES THEREOF AND A SECOND METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF NOBLE METAL OXIDES THEREOF AND MIXTURES THEREOF, SAID FIRST AND SECOND METALLIC COMPONENTS BEING DEPOSITED UPON THE SURFACES OF AN ALUMINA CATALYST SUPPORT MATERIAL, SAID ALUMINA SUPPORT MATERIAL HAVING A SURFACE AREA OF AT LEAST 10 SQUARE METERS PER GRAM, AN ACIDITY FACTOR NOT IN EXCESS OF 2.0 AND A MACROPORE VOLUME OF AT LEAST 0.05 CC PER GRAM, AT AN LHSV OF FROM ABOUT 1 TO ABOUT 100, SAID PARAFFIN MATERIAL CONSISTING ESSENTIALLY OF ONE OR MORE PARAFFINS HAVING A CHAIN LENGTH OF FROM ABOUT 8 TO ABOUT 24 CARBON ATOMS.
Claim 2
Independent Claim
154 words
A METHOD FOR PRODUCING MONO-OLEFINS FROM PARAFFINS WHICH COMPRISES PASSING A MIXTURE OF A PARAFFIN MATERIAL AND HYDROGEN AT A TEMPERATURE OF FROM ABOUT 400*C TO ABOUT 650*C INTO CONTACT WITH A CATALYST COMPRISING A FIRST METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF COBALT, ZINC. OXIDES THEREOF AND MIXTURES THEREOF AND A SECOND METALLIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF NOBLE METAL OXIDES THEREOF AND MIXTURES THEREOF, SAID FIRST AND SECOND METALLIC COMPONENTS BEING DEPOSITED UPON THE SURFACES OF AN ALUMINA CATALYST SUPPORT MATERIAL, SAID ALUMINA SUPPORT MATERIAL HAVING A SURFACE AREA OF AT LEAST 10 SQUARE METERS PER GRAM, AN ACIDITY FACTOR NOT IN EXCESS OF 2.0 AND A MACROPORE VOLUME OF AT LEAST 0.05 CC PER GRAM, AT AN LHSV OF FROM ABOUT 1 TO ABOUT 100, SAID PARAFFIN MATERIAL CONSISTING ESSENTIALLY OF ONE OR MORE PARAFFINS HAVING A CHAIN LENGTH OF FROM ABOUT 8 TO ABOUT 24 CARBON ATOMS.
Claim 3
Dependent Claim
35 words
A method according to claim 1 wherein said LHSV is from about 5 to about 50, and said paraffin material is a mixture of paraffins having an average chain length of from C10 to C15.
Claim 4
Dependent Claim
36 words
A method according to claim 2 wherein said catalyst has deposited upon the surfaces of the alumina support material from about 0.1 percent to about 4 percent cobalt or 0.1 percent to about 3 percent zinc.
Claim 5
Dependent Claim
24 words
A method according to claim 3 wherein said catalyst contains from about 0.01 percent to about 3 percent of alkali metal in combined form.
References Cited (Backward Citations)
US3446865A
Cited
US3448165A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |