US2542813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of catalyst
Assignee: Dow Chemical Co
•
Filing: 1946-07-25
•
Granted: 1951-02-20
•
Expires: 1966-07-25
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906; Y10S585/949; Y10S585/955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD WHICH COMPRISES FORMING AND PRECIPITATING A CALCIUM NICKEL PHOSPHATE MATERIAL, EFFECTIVE AS A CATALYST FOR THE DEHYDROGENATION OF BUTYLENE TO FORM BUTADIENE, BY SIMULTANEOUSLY PASSING WATER-SOLUBLE ALKALINE SUBSTANCE, AN AQUEOUS SOLTUION OF A CALCIUM SALT AND AN AQUEOUS SOLUTION OF A NICKEL SALT, ONE OF WHICH STARTING MATERIALS COMPRISES A WATER-SOLUBLE ORTHO-PHOSPHATE AND THE CALCIUM AND NICKEL SALTS BEGIN IN RELATIVE PROPORTIONS CORRESPONDING TO FROM 6.5 TO 12 ATOMS OF CALCIUM PER ATOM OF NICKEL, INTO A REACTION ZONE AT RELATIVE RATES OF FLOW SUCH THAT THE RESULTANT MIXTURE IS OF AN AVERAGE PH VALUE BETWEEN 7.7 AND 8.3, AGITATING THE MIXTURE AS IT IS FORMED, AND RETAINING AT LEAST A PORTION OF THE PRECIPITATE CALCIUM NICKEL PHOSPHATE MATERIAL
Claim 2
Independent Claim
121 words
A METHOD WHICH COMPRISES FORMING AND PRECIPITATING A CALCIUM NICKEL PHOSPHATE MATERIAL, EFFECTIVE AS A CATALYST FOR THE DEHYDROGENATION OF BUTYLENE TO FORM BUTADIENE, BY SIMULTANEOUSLY PASSING WATER-SOLUBLE ALKALINE SUBSTANCE, AN AQUEOUS SOLTUION OF A CALCIUM SALT AND AN AQUEOUS SOLUTION OF A NICKEL SALT, ONE OF WHICH STARTING MATERIALS COMPRISES A WATER-SOLUBLE ORTHO-PHOSPHATE AND THE CALCIUM AND NICKEL SALTS BEGIN IN RELATIVE PROPORTIONS CORRESPONDING TO FROM 6.5 TO 12 ATOMS OF CALCIUM PER ATOM OF NICKEL, INTO A REACTION ZONE AT RELATIVE RATES OF FLOW SUCH THAT THE RESULTANT MIXTURE IS OF AN AVERAGE PH VALUE BETWEEN 7.7 AND 8.3, AGITATING THE MIXTURE AS IT IS FORMED, AND RETAINING AT LEAST A PORTION OF THE PRECIPITATE CALCIUM NICKEL PHOSPHATE MATERIAL
References Cited (Backward Citations)
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US2084511A
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US2415705A
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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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |