Patent US3900525A successfully refreshed from Google Patents.
US3900525A
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Manganese ferrite catalyzed oxidative dehydrogenation
Assignee: Texas Petrochemicals Corp
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Filing: 1974-06-03
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Granted: 1975-08-19
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Expires: 1994-06-03
Abstract
Abstract Improved catalysts for dehydrogenation can be prepared by coprecipitating the metal containing catalysts from a solution of metal ions in the presence of a high molecular weight polyhydric material such as potato starch. The result of having the polyhydric material present is that the precipitate has the form of a gelatinous precipitate of improved processability. The catalyst itself is more active in dehydrogenations and physically stronger than comparable catalyst prepared by conventional methods.
Inventors
- 👤 Harold F Christmann
- 👤 Paul H Teel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:19
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8892; B01J37/00; B01J37/0009; B01J37/0018; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
24 words
IN A PROCESS FOR THE VAPOR PHASE OXIDATIVE DEHYDROGENATION ACYCLIC NON-QUATERNARY HYDROCARBONS HAVING 4 TO 5 CONTIGUOUS CARBON ATOMS AND HAVING AT LEAST ONE
Claim 2
Dependent Claim
24 words
IN A PROCESS FOR THE VAPOR PHASE OXIDATIVE DEHYDROGENATION ACYCLIC NON-QUATERNARY HYDROCARBONS HAVING 4 TO 5 CONTIGUOUS CARBON ATOMS AND HAVING AT LEAST ONE
Claim 3
Dependent Claim
15 words
The process according to claim 1 wherein said polyhydric compound is a polyester or polyether.
Claim 4
Dependent Claim
13 words
The process according to claim 1 wherein said polyhydric compound is a polysaccharide.
Claim 5
Dependent Claim
11 words
The process according to claim 3 wherein said polysaccharide is branched.
Claim 6
Dependent Claim
17 words
The process according to claim 4 wherein the polysaccharide has a 1-4, 1-6 or mixed glycoside linkage.
Claim 7
Dependent Claim
30 words
The process according to claim 4 wherein said polysaccharide is selected from the group consisting of potato starch, corn starch, tapioca starch, arrowroot starch, gum arabic, gum tragacanth and dextran.
Claim 8
Dependent Claim
27 words
The process according to claim 3 wherein the soluble metal component is iron chloride and manganese chloride in water and the precipitating agent is an alkaline solution.
Claim 9
Dependent Claim
11 words
The process according to claim 3 wherein the hydrocarbons are n-butenes.
Claim 10
Dependent Claim
24 words
The process of claim 1 wherein the insoluble metal component is an oxide, mixture of oxides or compounds that are the precursors of oxides.
References Cited (Backward Citations)
US2697066A
Cited
US3420912A
Cited
US3526675A
Cited
US3567793A
Cited
US3671606A
Cited
US3843745A
Cited
US3849545A
Cited
US3828101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |