US3156707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aliphatic hydrocarbons
Assignee: Petro Tex Chemical Corp
•
Filing: 1962-05-17
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Granted: 1964-11-10
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Expires: 1982-05-17
Abstract
No abstract record available.
Inventors
- 👤 Ralph O Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:49
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/24; B01J21/00; B01J21/02; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A PROCESS FOR THE PREPARATION OF MALEIC ANHYDRIDE AT HIGH YIELDS WHICH COMPRISES CONTACTING A GASEOUS MIXTURE OF BUTENE AND OXYGEN AT AN ELEVATED TEMPERATURE WITH A CATALYST OBTAINED BY DEPOSITING ON A CARRIER A CATALYST SOLUTION OF PHOSPHORUS AND VANADIM ATOMS, IN AN ATOMIC RATION OF ABOUT 1.0 TO 2.0 ATOMS OF PHOSPHORUS PER ATOM OF VANADIUM, THE SAID VANADIUM HAVING A VALENCE OF NO GREATER THAN ABOUT FOUR AT THE TIME OF DEP-/ OSITION OF THE SOLUTION ON THE CARRIER, AND THEREAFTER DRYING THE RESULTING COATED CARRIER TO FORM THE CATALYST, THE SAID CATALYST SOLUTION HAVING BEEN PREPARED BY DISSOLVING VANADIUM PENTOXIDE IN AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID AND THERAFTER ADDING THE PHOSPHORUS ATOMS TO THE SOLUTION.
Claim 2
Dependent Claim
120 words
A PROCESS FOR THE PREPARATION OF MALEIC ANHYDRIDE AT HIGH YIELDS WHICH COMPRISES CONTACTING A GASEOUS MIXTURE OF BUTENE AND OXYGEN AT AN ELEVATED TEMPERATURE WITH A CATALYST OBTAINED BY DEPOSITING ON A CARRIER A CATALYST SOLUTION OF PHOSPHORUS AND VANADIM ATOMS, IN AN ATOMIC RATION OF ABOUT 1.0 TO 2.0 ATOMS OF PHOSPHORUS PER ATOM OF VANADIUM, THE SAID VANADIUM HAVING A VALENCE OF NO GREATER THAN ABOUT FOUR AT THE TIME OF DEP-/ OSITION OF THE SOLUTION ON THE CARRIER, AND THEREAFTER DRYING THE RESULTING COATED CARRIER TO FORM THE CATALYST, THE SAID CATALYST SOLUTION HAVING BEEN PREPARED BY DISSOLVING VANADIUM PENTOXIDE IN AN AQUEOUS SOLUTION OF HYDROCHLORIC ACID AND THERAFTER ADDING THE PHOSPHORUS ATOMS TO THE SOLUTION.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |