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US 11,305,264 B2Granted
Manufacturing hydrocracking catalyst
AssigneeSaudi Arabian Oil Company
InventorsRobert Peter Hodgkins, Omer Refa Koseoglu, Koji Uchida, Tomoyasu Kagawa, Mitsunori Watabe
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Abstract
A method including subjecting an ultra-stable Y-type zeolite having a low silica-to-alumina molar ratio (SAR), such as in a range of 3 to 6, to acid treatment and heteroatom incorporation contemporaneously to give a framework-modified ultra-stable Y-type zeolite.
Claims23
A method of producing a hydrocracking catalyst for hydrocarbon oil, comprising:
- exchanging at least 80% of sodium (Na) ions in a Y-type zeolite with ammonium (NH4) ions to convert the Y-type zeolite to an ultra-stable Y-type zeolite comprising a silica-to-alumina molar ratio (SAR) in a range of 3 to 6;
- and
- subjecting the ultra-stable Y-type zeolite comprising the SAR in the range of 3 to 6 to incorporation of heteroatoms and acid treatment simultaneously to give a framework-modified ultra-stable Y-type zeolite comprising an SAR of at least 20, wherein the heteroatoms are incorporated into a framework of the ultra-stable Y-type zeolite, the heteroatoms comprising titanium atoms and further comprising zirconium atoms or hafnium atoms, or both.
A method of producing a hydrocracking catalyst, comprising
- preparing a suspension of an ultra-stable Y-type zeolite in a liquid, the ultra-stable Y-type zeolite having a silica-to-alumina molar ratio (SAR) in a range of 3 to 6;
- performing acid treatment on the ultra-stable Y-type zeolite to increase the SAR of the ultra-stable Y-type zeolite, the acid treatment comprising adding an acid to the suspension;
- adding heteroatoms to the suspension simultaneously with performing the acid treatment to incorporate the heteroatoms into a framework of the ultra-stable Y-type zeolite to give a framework-substituted ultra-stable Y-type zeolite having an SAR of at least 20;
- and
- impregnating a hydrogenative metal on a catalyst support comprising the framework-substituted ultra-stable Y-type zeolite.
2 more elements
A method of forming a framework-modified ultra-stable Y-type zeolite for a catalyst support of a hydrocracking catalyst, comprising:
- subjecting an ultra-stable Y-type zeolite having a silica-to-alumina molar ratio (SAR) in a range of 3 to 6 to incorporation of heteroatoms and acid treatment simultaneously to give the framework-modified ultra-stable Y-type zeolite;
- and
- wherein the framework-modified ultra-stable Y-type zeolite comprises an SAR of at least 30 and a specific surface area of at least 600 square meter per gram (m2/g).
Dependencies are inferred from the claim text.