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Oxidative dehydrogenation catalysts and their method of preparation

Assignee: Texas Petrochemicals Corp
•
Filing: 1973-08-06
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Granted: 1975-03-18
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Expires: 1993-08-06
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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

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