Transition-metal-aluminosilicate hydrocarbon conversion catalysts having an L type structure, ECR-22-D
AssigneeExxon Research & Engineering Co.
InventorsDavid E. W. Vaughan, Karl G. Strohmaier
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Abstract
This invention relates to novel zeolitic compositions having zinc as well as aluminum and silicon in the framework tetrahedral positions. The composition has a structure similar to type-L aluminosilicate zeolites. The invention also involves a process of preparation in which one or more divalent transition metals is directly synthesized into the product metalo-aluminosilicate.
Claims21
A crystalline microporous transition-metal-aluminosilicate having a structure substantially isostructural with L aluminosilicate zeolite and wherein a portion of Ni, Co, Zn or mixtures thereof is in the tetrahedral position of the transition-metal-aluminosilicate.
A process for producing a microporous transition-metal-aluminosilicate having a structure isostructural with an L aluminosilicate structure and transition metal within the tetrahedral framework of the transition-metal-aluminosilicate, comprising the steps of:
- preparing a reaction mixture comprising an alumina source, a silica source, a divalent transition-metal-source and a potassium oxide source, with substantial mixing,
- maintaining the reaction mixture at a temperature and for a time sufficient to crystallize said transition-metal-aluminosilicate,
- recovering said transition-metal-alumino-silicate.
Dependencies are inferred from the claim text.