Isomerization catalyst
AssigneeShell Oil Company
InventorsMonique Van der Zon, Vincent Rogers, Hong-Xin Li, William Edward Cormier, Bjorn Moden, Bart Pelgrim, Wiebe S. Kijlstra
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Abstract
Paraffin isomerization catalyst comprising of from 0.01 to 5 wt. % of a Group VIII noble metal on a carrier containing alumina and zeolite beta having a silica to alumina molar ratio (SAR) of from 5 to 15 and process employing such catalyst for isomerization of a hydrocarbon feed containing paraffins having of from 4 to 8 carbon atoms.
Claims24
A paraffin isomerization catalyst comprising:
- from 0.01 to 5 wt. % of a Group VIII noble metal on a carrier containing alumina and zeolite beta that does not contain an organic structure directing agent and having a silica to alumina molar ratio (SAR) of from 5 to 15.
A paraffin isomerization catalyst, comprising a Group VIII noble metal impregnated onto a carrier comprising alumina and zeolite beta, wherein the zeolite beta is prepared by a process which comprises
- (a) mixing and stirring an alkali oxide source, an aluminum oxide source, a silicon dioxide source and water without addition of an organic structure directing agent (SDA) to provide an aluminosilicate synthesis gel having the following mole ratio of raw materials:
- SiO2/Al2O3=15-45, Na2O/SiO2=0.20-0.50, H2O/SiO2=4-50;
- and
- (b) adding zeolite crystal seed and allowing the aluminosilicate synthesis gel to crystallize at elevated temperature to obtain the zeolite beta crystals having a silica to alumina molar ratio (SAR) of from 5 to 15.
A paraffin isomerization catalyst, comprising:
- a formed and calcined carrier comprising from 2 to 50 wt. % alumina and from 50 to 98 wt. % zeolite beta that does not contain an organic structure directing agent and having a silica-to-alumina molar ratio (SAR) in the range of from 5 to 12, wherein said formed and calcined carrier is impregnated with an amount of Group VIII noble metal to provide from 0.01 to 5 wt. % said Group VIII noble metal on said formed and calcined carrier.
A paraffin isomerization catalyst, comprising a Group VIII noble metal impregnated onto a carrier comprising alumina and zeolite beta, wherein the zeolite beta is prepared by a process which comprises:
- (a) mixing and stirring an alkali oxide source, an aluminum oxide source, a silicon dioxide source and water without addition of an organic structure directing agent (SDA) to provide an aluminosilicate synthesis gel having the following mole ratio of raw materials:
- SiO2/Al2O3=15-45, Na2O/SiO2=0.20-0.50, H2O/SiO2=4-50;
- and
- (b) adding zeolite crystal seed and allowing the aluminosilicate synthesis gel to crystallize at elevated temperature to obtain the zeolite beta crystals having a silica to alumina molar ratio (SAR) of from 5 to 12.
Dependencies are inferred from the claim text.