Patent US3872027A successfully refreshed from Google Patents.
US3872027A
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Oxidative dehydrogenation catalysts and their method of preparation
Assignee: Texas Petrochemicals Corp
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Filing: 1973-08-06
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Granted: 1975-03-18
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Expires: 1993-08-06
Abstract
Abstract Improved catalysts for oxidative dehydrogenation can be prepared by coprecipitating the metal containing catalysts from a solution of metal ions comprising iron and at least one other metal 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
2026-10-28 23:10
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/42; C07C5/48; B; B01; B01J; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J23/76; B01J37/00; B01J37/0009; B01J37/0018; B01J37/02; B01J37/03; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
199 words
IN THE METHOD OF PREPARING A CATALYST FOR USE IN PROCESES FOR OXIDATIVELY DEHYDROGENATING ORGANIC COMPOUNDS WHEREIN THE METHOD COMPRISES PREPARING A SOLUTION OF A SOLUBLE IRON COMPONENT AND ANOTHER SOLUBLE METAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF MG, CA, SR, BA, MN, CR, CO, NI, ZN, CD AND MIXTURES THEREOF, CONTACTING SAID SOLUTION OF SOLUBLE COMPONENTS WITH A PRECIPITATION AGENT TO PRECIPITATE AN INSOLUBLE COMPONENT OF IRON AND THE OTHER METAL AT A TEMPERATURE IN THE RANGE OF 20* TO 100*C. AND A PRESSURE OF .5 TO 50 ATMOSPHERES, RECOVERING AND FILTERING SAID INSOLUBLE COMPONENT OF CALCINING SAID METAL COMPONENT TO FORM METAL FERRITE, WHEREIN THE IMPROVEMENT COMPRISES ADDING 0.1 TO 4 WEIGHT PERCENT BASED ON THE METAL COMPONENT OF A SOLUBLE POLYHYDRIC ORGANIC COMPOUND TO SAID SOLUTION PRIOR TO CONTACTING SAID SOLUTION WITH SAID PRECIPITATING AGENT, SAID POLYHYYDRIC COMPOUND HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 3,000 TO 4000,000 AND FURTHER BEING SELECTED FROM THE GROUP CONSISTING OF POLYESTERS DERIVED FROM POLYBASIC HYDROCARBYL CARBOXYLIC ACIDS AND HYDROCARBYL POLYOLS; POLYETHERS BEING THE CONDENSATION PRODUCTS OF ETHYLENE OXIDE, PROPYLENE OXIDE OR MIXTURE THEREOF WITH POLYOLS; POLYSACCHARIDES AND MIXTURES THEREOF, SAID INSOLUBLE METAL COMPONENT BEING A GELATINOUS MATERIALS.
Claim 2
Dependent Claim
199 words
IN THE METHOD OF PREPARING A CATALYST FOR USE IN PROCESES FOR OXIDATIVELY DEHYDROGENATING ORGANIC COMPOUNDS WHEREIN THE METHOD COMPRISES PREPARING A SOLUTION OF A SOLUBLE IRON COMPONENT AND ANOTHER SOLUBLE METAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF MG, CA, SR, BA, MN, CR, CO, NI, ZN, CD AND MIXTURES THEREOF, CONTACTING SAID SOLUTION OF SOLUBLE COMPONENTS WITH A PRECIPITATION AGENT TO PRECIPITATE AN INSOLUBLE COMPONENT OF IRON AND THE OTHER METAL AT A TEMPERATURE IN THE RANGE OF 20* TO 100*C. AND A PRESSURE OF .5 TO 50 ATMOSPHERES, RECOVERING AND FILTERING SAID INSOLUBLE COMPONENT OF CALCINING SAID METAL COMPONENT TO FORM METAL FERRITE, WHEREIN THE IMPROVEMENT COMPRISES ADDING 0.1 TO 4 WEIGHT PERCENT BASED ON THE METAL COMPONENT OF A SOLUBLE POLYHYDRIC ORGANIC COMPOUND TO SAID SOLUTION PRIOR TO CONTACTING SAID SOLUTION WITH SAID PRECIPITATING AGENT, SAID POLYHYYDRIC COMPOUND HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 3,000 TO 4000,000 AND FURTHER BEING SELECTED FROM THE GROUP CONSISTING OF POLYESTERS DERIVED FROM POLYBASIC HYDROCARBYL CARBOXYLIC ACIDS AND HYDROCARBYL POLYOLS; POLYETHERS BEING THE CONDENSATION PRODUCTS OF ETHYLENE OXIDE, PROPYLENE OXIDE OR MIXTURE THEREOF WITH POLYOLS; POLYSACCHARIDES AND MIXTURES THEREOF, SAID INSOLUBLE METAL COMPONENT BEING A GELATINOUS MATERIALS.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein the polyhydric compound has at least three hydroxyl groups per molecule.
Claim 4
Dependent Claim
15 words
The method according to claim 1 wherein the polyhydric compound is a polyester or polyether.
Claim 5
Dependent Claim
13 words
The method according to claim 2 wherein the polyhydric compound is a polysaccharide.
Claim 6
Dependent Claim
11 words
The method according to claim 4 wherein the polysaccharide is branched.
Claim 7
Dependent Claim
16 words
The method according to claim 5 wherein the polysaccharide has 1-4, 1-6 or mixed glycoside linkage.
Claim 8
Dependent Claim
30 words
The method according to claim 5 wherein the polysaccharide is selected from the group consisting of potato starch, corn starch, tapioca starch, arrowroot starch, gum arabic, gum tragacanth and dextran.
Claim 9
Dependent Claim
21 words
The method according to claim 1 wherein the solution of soluble metal component and the precipitating agent are contacted with agitation.
Claim 10
Dependent Claim
19 words
The method according to claim 1 wherein the solution of soluble metal component is sprayed into the precipitating agent.
Claim 11
Dependent Claim
44 words
The method preparing an oxidative dehydrogenation catalyst according to claim 1 wherein the soluble metal component comprises iron and at least one other metal provided that the insoluble metal component is an oxide, mixture of oxides or compounds that are the precursors of oxides.
Claim 12
Dependent Claim
25 words
The method according to claim 1 wherein the catalyst comprises a member selected from the group consisting of magnesium ferrite, manganese ferrite and zinc ferrite.
Claim 13
Dependent Claim
13 words
The method according to claim 1 wherein said other metal component comprises Mg.
Claim 14
Dependent Claim
13 words
The method according to claim 1 wherein said other metal component comprises Mn.
Claim 15
Dependent Claim
13 words
The method according to claim 1 wherein said other metal component comprises Zn.
Claim 16
Dependent Claim
9 words
An oxidative dehydrogenation catalyst prepared according to claim 1.
References Cited (Backward Citations)
GB708957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |