Pq Corporation

Cornelius Ouwehand

David Allen Cooper

Lay Hwa Ong

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&#xb0; C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800&#xb0; C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850&#xb0; C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900&#xb0; C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950&#xb0; C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000&#xb0; 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 cmbut substantially no peaks at 3605 and 3670 cmand 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.

Growing community of inventors

Purmerend, Netherlands

Cornelius Ouwehand