Method of making alumina having bimodal pore structure, and catalysts made therefrom
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/00
B01J-023/40
B01J-023/42
B01J-023/56
B01J-023/44
출원번호
US-0724072
(2000-11-28)
발명자
/ 주소
Ginestra, Josiane M.
Ackerman, Russell C.
Michel, Christian G.
출원인 / 주소
Shell Oil Company
인용정보
피인용 횟수 :
18인용 특허 :
60
초록▼
A method for making alumina having a pore structure characterized by the absence of macropores, no more than 5% of the total pore volume in pores greater than 350 .ANG., a high pore volume (greater than 0.8 cc/g measured by mercury intrusion) and a bi-modal pore volume distribution character, where
A method for making alumina having a pore structure characterized by the absence of macropores, no more than 5% of the total pore volume in pores greater than 350 .ANG., a high pore volume (greater than 0.8 cc/g measured by mercury intrusion) and a bi-modal pore volume distribution character, where the two modes are separated by 10 to 200 .ANG., and the primary pore mode is larger than the median pore diameter (MPD), calculated either by volume or by surface area, the MPD by volume being itself larger than the MPD by surface area. Alumina made by such process and catalyst made therefrom.
대표청구항▼
A method for making alumina having a pore structure characterized by the absence of macropores, no more than 5% of the total pore volume in pores greater than 350 .ANG., a high pore volume (greater than 0.8 cc/g measured by mercury intrusion) and a bi-modal pore volume distribution character, where
A method for making alumina having a pore structure characterized by the absence of macropores, no more than 5% of the total pore volume in pores greater than 350 .ANG., a high pore volume (greater than 0.8 cc/g measured by mercury intrusion) and a bi-modal pore volume distribution character, where the two modes are separated by 10 to 200 .ANG., and the primary pore mode is larger than the median pore diameter (MPD), calculated either by volume or by surface area, the MPD by volume being itself larger than the MPD by surface area. Alumina made by such process and catalyst made therefrom. B>is defined by the following relationship: R1=(AO+AX2+Z2O+Z2X2)/(Ga2O3+Al2O3), where A is at least one alkaline earth metal, Z is at least one alkali metal, and X is at least one halide. 4. The composition according to claim 2, further comprising a third compound selected from the group consisting Ta2O5,having a concentration of less than about 15 mole percent, Bi2O3,having a concentration of less than about 50 mole percent, Al2O3,having a concentration of less than about 20 mole percent, PbO, having a concentration of less than about 50 mole percent, and combinations thereof. 5. The composition according to claim 4, wherein a composition ratio R1is greater than or equal to 0.4 and less than or equal to 2.5, wherein R1is defined by the following relationship: R1=(AO+AX2+Z2O+Z2X2)/(Ga2O3+Al2O3), where A is at least one alkaline earth metal, Z is at least one alkali metal, and X is at least one halide. 6. The composition according to claim 2, wherein the composition has a composition ratio R1of about 0.8 to about 1.25, wherein R1is defined by the following relationship: R1=(AO+AX2+Z2O+Z2X2)/(Ga2O3+Al2O3), where A is at least one alkaline earth metal, Z is at least one alkali metal, and X is at least one halide. 7. The composition according to claim 2, wherein the composition has a composition ratio R2of about 1.8 to about 2.25, wherein R2is defined by the following relationship: R2=(AO+AX2)/(Z2O+Z2X2), where A is at least one alkaline earth metal, Z is at least one alkali metal, and X is at least one halide. 8. The composition according to claim 1, wherein: GeO2has a concentration of about 50 mole percent to about 90 mole percent; Tm2O3has a concentration of about 0.001 mole percent to about 2 mole percent; and Ga2O3,has a concentration of about 2 mole percent to about 40 mole percent. 9. The composition according to claim 1, wherein the total alkaline earth metal halide concentration is about 2 mole percent. 10. The composition according to claim 9, wherein: GeO2has a concentration of about 60 mole percent; Tm203has a concentration of about 0.5 weight percent; Ga2O3has a concentration of about 10 mole percent to about 18 mole percent; and wherein the composition further comprises BaO having a concentration of about 18 mole percent to about 30 mole percent. 11. The composition according to claim 10, wherein a Tm3+emission characteristic of the composition is varied by selecting the composition ratio R1,wherein R1is defined by the following relationship: R1=(AO+AX2+Z2O+Z2X2)/(Ga2O3+Al2O3), where A is at least one alkaline earth metal, Z is at least one alkali metal, and X is at least one halide. 12. The composition according to claim 11, wherein R1is between 0.4 and 2.5. 13. A composition comprsing: GeO2having a concentration of about 65 mole percent to about 75 mole percent; Tm2O3having a concentration of about 0.05 mole percent to about 0.1 mole percent; Ga2O3,having a concentration of about 10 mole percent to about 18 mole percent; BaO having a concentration of about 2 mole percent to about 7 mole percent; CaF2having a concentration of about 0.1 mole percent to about 10 mole percent; CaO having a concentrat
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