Copper chromite catalyst and process for preparation said catalyst
First Claim
1. A formed copper chromite catalyst prepared from a blend comprising from about 20 to about 80% by weight of copper chromite and from about 20 to about 80% by weight of at least one extrudable inorganic binder material wherein the catalyst has a surface area from about 20 to about 225 m2 /g, and the total pore volume of the pores in said catalyst having a diameter of up to about 95,000 Å
- is between about 0.35 to about 1 cc/g.
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Abstract
In one embodiment,the invention relates to a formed copper chromite catalyst prepared from a blend comprising from about 20 to about 80% by weight of copper chromite and from about 20 to about 80% by weight of at least one extrudable inorganic binder material wherein the catalyst has a surface area of from about 20 to about 225 m2 /g, and the total pore volume of the pores in said catalyst having a diameter of up to about 95,000 Å is between about 0.35 to about 1 cc/g. In another embodiment, the invention relates to a process for preparing the formed copper chromite catalyst of the invention, and the process comprises
(A) preparing a blend comprising from about 20 to about 80% by weight of copper chromite, from about 20 to about 80% by weight of at least one extrudable inorganic binder material, from about 1 to about 10% by weight, based on the weight of the binder, of a peptizing agent, and sufficient water to form an extrudable blend;
(B) extruding the blend to form an extrudate; and
(C) calcining the extrudate.
The invention also relates to a process for hydrogenating aldehydes, ketones, carboxylic acids and carboxylic acid esters with catalysts of the type described.
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Citations
22 Claims
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1. A formed copper chromite catalyst prepared from a blend comprising from about 20 to about 80% by weight of copper chromite and from about 20 to about 80% by weight of at least one extrudable inorganic binder material wherein the catalyst has a surface area from about 20 to about 225 m2 /g, and the total pore volume of the pores in said catalyst having a diameter of up to about 95,000 Å
- is between about 0.35 to about 1 cc/g.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 20, 21, 22)
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5. The catalyst of claim 1 wherein the binder material comprises a mixture of alumina and at least one additional inorganic oxide.
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6. The catalyst of claim 1 comprising from about 50 to about 80% by weight of copper chromite and from about 20 to about 50% by weight of at least one inorganic binder material.
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7. The catalyst of claim 5 wherein the binder material comprises a mixture of alumina and silica.
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8. The catalyst of claim 1 wherein the binder material comprises a mixture of alumina and a crystalline inorganic polymer comprising silica and alumina.
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9. The catalyst of claim 8 wherein the mole ratio of silica to alumina is at least 10.
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10. The catalyst of claim 8 wherein the crystalline inorganic polymer is an aluminosilicate zeolite.
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11. The catalyst of claim 8 wherein the catalyst comprises from about 5% to about 30% of the crystalline inorganic polymer.
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12. The catalyst of claim 1 wherein at least of portion of the copper and copper chromite are present in the reduced state.
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13. The catalyst of claim 1 also including up to about 10% by weight of a stabilizer selected from the group consisting of barium and manganese.
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19. A method of preparing the formed copper chromite catalyst of claim 1 comprising
(A) preparing a blend comprising from about 20 to about 80% by weight of copper chromite, from about 20 to about 80% by weight of at least one extrudable inorganic binder material, from about 1 to about 10% by weight, based on the weight of the binder, of a peptizing agent, and sufficient water to form an extrudable blend; -
(B) extruding the blend to form an extrudate; and (C) calcining the extrudate.
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20. The method of claim 19 wherein the calcined extrudate obtained in step (c) is reduced.
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21. The method of claim 20 wherein the reduced catalyst is stabilized with air or CO2 or protected with an inert liquid.
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22. The method of claim 19 wherein the peptizing agent is a mineral or an organic acid.
- 14. A formed copper chromite catalyst prepared from a blend of from about 20 to about 80% by weight of copper chromite wherein at least a portion has the formula
- space="preserve" listing-type="equation">CuO.CuCr.sub.2 O.sub.4
and from about 20 to about 80% by weight of a mixture of at least two extrudable inorganic binder materials, said catalyst having a surface area of from about 75 and about 180 m2 /g, and the total pore volume of the pores in said catalyst having a diameter of up to about 95,000 Å
is between about 0.40 and about 0.70 cc/g.- View Dependent Claims (15, 16, 17, 18)
Specification