Antimony and tin containing compound, use of such a compound as a passivating agent, and process for preparing such a compound
AssigneesInteven, S.A., Universidad Simon Bolivar
InventorsNelson Martinez, Juan Lujano, Nieves Alvarez, Jacek Lubinkowski, William McEwen
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Abstract
An antimony and tin containing compound for passivating contaminant metals to which a catalyst is exposed during fluid catalytic cracking of hydrocarbons containing said contaminant metals, said compound having a composition as follows (R*).sub.x Sb(OSn(R**).sub.3).sub.n wherein R* and R** are aryl compounds having between 6 to 13 carbon atoms, wherein n=1, 2 or 3 and x=4 when n=1, x=3 when n=2, and x=0 when n=3.
Claims28
An antimony and tin containing compound for passivating contaminant metals to which a catalyst is exposed during fluid catalytic cracking of hydrocarbons containing said contaminant metals, said compound having a composition as follows:
- (R*).sub.x Sb(OSn(R**).sub.3).sub.n
- wherein
- R* and R** are aryl compounds having between 6 to 13 carbon atoms, wherein n=1, 2 or 3 and x=4 when n=1, x=3 when n=2, and x=0 when n=3.
A process for preparing an antimony and tin containing compound for passivating contaminant metals to which a catalyst is exposed during fluid catalytic cracking of hydrocarbons containing said contaminant metals wherein the process comprises reacting an antimony containing compound with a triaryl tin hydroxide compound in the presence of an alkylamine catalyst so as to form a reaction mixture containing said antimony and tin containing compound, and crystallizing said antimony and tin containing compound from said reaction mixture.
A process for passivating the effect of contaminant metals in a hydrocarbon feedstock on a cracking catalyst used in fluid catalytic cracking of said hydrocarbon feedstock, comprising the steps of:
- providing an antimony and tin containing compound having a composition as follows:
- (R*).sub.x Sb(OSn(R**).sub.3).sub.n
- wherein
- R* and R** are aryl compounds having between 6 to 13 carbon atoms, and wherein n =1, 2 or 3 and x=4 when n=1, x=3 when n=2, and x=0 when n=3;
- providing a fluid catalytic cracking catalyst;
- providing a hydrocarbon feedstock containing contaminant metals;
- treating said feedstock with said catalyst in the presence of said compound;
- and
- maintaining a molar ratio of antimony and tin to contaminant metal of between about 0.01 to 10.0.
Dependencies are inferred from the claim text.