US3271447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid phase oxidation of propylene to acrylic acid in the presence of an mn or ni catalyst
Assignee: EIDP Inc
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Filing: 1964-05-11
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Granted: 1966-09-06
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Expires: 1984-05-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Marcus A Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN OXIDATION PROCESS WHICH COMPRISES SIMULTANEOUSLY CONTACTING PROPYLENE, OXYGEN, ALKANOIC ACID SOLVENT, AND SALT OF 1 TO 100,000 PARTS BY WEIGHT, PER MILLION PARTS BY WEIGHT OF SAID SOLVENT, A CATALYTIC METAL FROM THE GROUP CONSISTING OF MANGANESE AND NICKEL, IN LIQUID SUBSTANTIALLY ANHYDROUS PHASE, AT A TEMPERATURE OF 125*C. TO 250*C. AND A PRESSURE OF 5 TO 200 ATMOSPHERES, CONTINUING AND CONTACTING UNTIL ACRYLIC ACID IS THE PRINCIPAL OXIDATION PRODUCT, AND SEPARATING ACRYLIC ACID FROM THE RESULTING REACTION MIXTURE.
Claim 2
Dependent Claim
80 words
AN OXIDATION PROCESS WHICH COMPRISES SIMULTANEOUSLY CONTACTING PROPYLENE, OXYGEN, ALKANOIC ACID SOLVENT, AND SALT OF 1 TO 100,000 PARTS BY WEIGHT, PER MILLION PARTS BY WEIGHT OF SAID SOLVENT, A CATALYTIC METAL FROM THE GROUP CONSISTING OF MANGANESE AND NICKEL, IN LIQUID SUBSTANTIALLY ANHYDROUS PHASE, AT A TEMPERATURE OF 125*C. TO 250*C. AND A PRESSURE OF 5 TO 200 ATMOSPHERES, CONTINUING AND CONTACTING UNTIL ACRYLIC ACID IS THE PRINCIPAL OXIDATION PRODUCT, AND SEPARATING ACRYLIC ACID FROM THE RESULTING REACTION MIXTURE.
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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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |