Back to results
US 9,308,521 B2Granted
Zeolite Y
AssigneePQ Corporation
InventorsDavid Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePQ Corporation
InventorsDavid Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong
Estimating the term…
Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C., a modified zeolite Y obtainable by such process, zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which has a peak at 3700 cm−1 but substantially no peaks at 3605 and 3670 cm−1 and zeolite Y having a silica to alumina molar ratio of at least 10, which zeolite Y has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram.
A process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700° C. to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from greater than 700° C. to less than 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from greater than 800° C. to less than 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from greater than 850° C. to less than 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from greater than 900° C. to less than 950° C. or (v) the steam partial pressure is at least 0.07 bar at a temperature of from greater than 950° C. to less than 1000° C.
A modified zeolite Y prepared by subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700° C. to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from greater than 700° C. to less than 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from greater than 800° C. to less than 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from greater than 850° C. to less than 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from greater than 900° C. to less than 950° C. or (v) the steam partial pressure is at least 0.07 bar at a temperature of from greater than 950° C. to less than 1000° C.
A zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which has a peak at 3700 cm−1 but substantially no peak at 3670 cm−1.
A zeolite Y having a silica to alumina molar ratio of at least 10, which zeolite Y has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram.
A method of using a zeolite, wherein a modified zeolite Y prepared by subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700° C. to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from greater than 700° C. to less than 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from greater than 800° C. to less than 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from greater than 850° C. to less than 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from greater than 900° C. to less than 950° C. or (v) the steam partial pressure is at least 0.07 bar at a temperature of from greater than 950° C. to less than 1000° C. is used as an adsorbent.
A method of using a zeolite, wherein a modified zeolite Y having a silica to alumina molar ratio of at least 10, the infrared spectrum of which has a peak at 3700 cm−1 but substantially no peak at 3670 cm−1 is used as an adsorbent.
A method of using a zeolite, wherein a modified zeolite Y having a silica to alumina molar ratio of at least 10, which zeolite Y has an acidity as measured by exchange with perdeuterated benzene of at most 20 micromole/gram is used as an adsorbent.
Dependencies are inferred from the claim text.