Epoxidation catalyst, a process for preparing the catalyst, and a process for the production of an olefin oxide
First Claim
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1. A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
- wherein;
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst;
b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof;
c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof;
d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst;
e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; and
f) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier.
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Abstract
A catalyst for the epoxidation of an olefin comprising a carrier and, deposited thereon, silver, a rhenium promoter, a first co-promoter, and a second co-promoter; wherein
- the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst;
- the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof;
- the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof;
- the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; and
- wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, a pore diameter of 0.01-200 μm, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter is 0.1-100 μm, and a water absorption of 10-80%.
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Citations
18 Claims
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1. A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
- wherein;
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; andf) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12)
- wherein;
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10. A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
- wherein;
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; e) wherein the carrier has a bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; and(f) wherein the carrier has at least two log differential pore volume distribution peaks in a pore diameter range of 0.01-100 μ
m and at least one the peaks is present in a pore diameter range of 0.01-1.0 μ
m in the pore size distribution as measured by mercury porosimetry, wherein each peak is a maximum value of the log differential pore volume distribution of 0.2 cm3/g or larger.
- wherein;
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11. A catalyst for the epoxidation of an olefin comprising a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
- wherein;
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; and e) wherein the carrier has a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; and(f) wherein the carrier has a bimodal pore size distribution, with a first mode of pores which has a mean diameter ranging from about 0.01 m to about 5 μ
m, and a second mode of pores which has a mean diameter ranging from about 5 μ
m to about 30 μ
m.
- wherein;
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13. A process for preparing a catalyst for the epoxidation of an olefin comprising depositing silver, a rhenium promoter, a first co-promoter, and a second co-promoter on a carrier;
- wherein
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; and e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; andf) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier. - View Dependent Claims (16, 17)
- wherein
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14. A process for preparing ethylene oxide by reacting a feed comprising ethylene and oxygen in the presence of a catalyst that comprises a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
- wherein;
a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; andf) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier.
- wherein;
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15. A process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine comprising:
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preparing ethylene oxide by reacting a feed comprising ethylene and oxygen in the presence of a catalyst that comprises a carrier and, deposited on the carrier, silver, a rhenium promoter, a first co-promoter, and a second co-promoter;
wherein;a) the quantity of the rhenium promoter deposited on the carrier is greater than 1 mmole/kg, relative to the weight of the catalyst; b) the first co-promoter is selected from sulfur, phosphorus, boron, and mixtures thereof; c) the second co-promoter is selected from tungsten, molybdenum, chromium, and mixtures thereof; d) the total quantity of the first co-promoter and the second co-promoter deposited on the carrier is at most 5.0 mmole/kg, relative to the weight of the catalyst; e) wherein the carrier has a monomodal, bimodal or multimodal pore size distribution, with a pore diameter range of 0.01-200 μ
m, a specific surface area of 0.03-10 m2/g, a pore volume of 0.2-0.7 cm3/g, wherein the median pore diameter of the carrier is 0.1-100 μ
m and has a water absorption of 10-80%; andf) wherein a fluoride-containing species and a strength-enhancing additive are incorporated into the carrier; and converting the ethylene oxide into the 1,2-diol, the 1,2-diol ether, the 1,2-carbonate, or the alkanolamine. - View Dependent Claims (18)
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Specification