ALKYLATION CATALYST
First Claim
1. A catalyst composition comprising an MWW framework structure, 0.1 wt % to 2.5 wt % fluorine relative to a weight of the catalyst composition, and a weight ratio of Sn to F in the catalyst composition of 0.1 to 2.0.
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Abstract
Catalyst compositions with improved alkylation activity and corresponding methods for making such catalyst compositions are provided. The catalyst(s) correspond to solid acid catalysts formed by exposing a catalyst precursor with a zeolitic framework structure to a molten metal salt that includes fluorine, such as a molten metal fluoride. The resulting fluorinated solid acid catalysts can have improved alkylation activity while having a reduced or minimized amount of structural change due to the exposure to the molten metal fluoride. This is in contrast to fluorinated solid acid catalysts that are exposed to higher severity forms of fluorination, such as exposure to ammonium fluoride or HF. SnF2 is an example of a suitable molten metal fluoride.
3 Citations
22 Claims
- 1. A catalyst composition comprising an MWW framework structure, 0.1 wt % to 2.5 wt % fluorine relative to a weight of the catalyst composition, and a weight ratio of Sn to F in the catalyst composition of 0.1 to 2.0.
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8. A method for making an alkylation catalyst, comprising:
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exposing a catalyst precursor comprising a zeolitic framework structure to a molten metal salt comprising fluoride anion at a temperature of 275°
C. or less; andmixing the catalyst precursor and the molten metal salt during at least a portion of the exposing to form a catalyst comprising a fluorinated zeolitic framework structure. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for performing alkylation, comprising:
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exposing a feedstock to a catalyst under effective alkylation conditions to form an alkylated effluent, wherein the catalyst comprises an MWW framework structure, 0.1 wt % to 2.5 wt % fluorine relative to a weight of the catalyst composition, and a weight ratio of Sn to F in the catalyst composition of 0.1 to 1.5. - View Dependent Claims (20, 21, 22)
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Specification