Alkylation catalyst

• US 10,639,619 B2
• Filed: 06/26/2018
• Issued: 05/05/2020
• Est. Priority Date: 07/19/2017
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: Nandi, Partha, Ide, Matthew S., Dakka, Jihad M., Nizami, Quddus A., Afeworki, Mobae
• Primary Examiner(s): Wood, Elizabeth D
• Application Number:
  US16/018,202
• Publication Number:
  US 20190022631A1
• Time in Patent Office: Days
• Field of Search: 502 60, 502 63, 502 64, 502 69, 502 85
• CPC Class Codes: B01J 2229/18 to introduce other elements into or onto the molecular sieve itself
• CPC Class Codes: B01J 2229/183 in framework positions
• CPC Class Codes: B01J 2229/186 not in framework positions
• CPC Class Codes: B01J 2229/20 to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
• CPC Class Codes: B01J 2229/42 Addition of matrix or binder particles
• CPC Class Codes: B01J 29/7038 MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
• CPC Class Codes: B01J 29/7088 MWW-type, e.g. MCM-22, ERB-1, ITQ-1, PSH-3 or SSZ-25
• CPC Class Codes: B01J 37/0009 Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
• CPC Class Codes: B01J 37/0201 Impregnation
• CPC Class Codes: B01J 37/023 using molten compounds
• CPC Class Codes: B01J 37/08 Heat treatment B01J37/0009, B01J37/0018 take precedence
• CPC Class Codes: B01J 37/26 Fluorinating
• CPC Class Codes: C07C 15/085 Isopropylbenzene
• CPC Class Codes: C07C 2/12 with crystalline alumino-silicates or with catalysts comprising molecular sieves
• CPC Class Codes: C07C 2/66 Catalytic processes
• CPC Class Codes: C07C 2/68 with halides
• CPC Class Codes: C07C 2529/70 of types characterised by their specific structure not provided for in groups C07C2529/08 - C07C2529/65
• CPC Class Codes: C10G 29/12 Halides
• CPC Class Codes: C10G 29/205 by reaction with hydrocarbons added to the hydrocarbon oil
• CPC Class Codes: Y02P 20/52 using catalysts, e.g. selective catalysts

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.

Claims

1. A catalyst composition comprising an MWW framework structure, tin and fluorine, wherein the catalyst comprises 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.

2. The catalyst composition of claim 1, wherein the catalyst composition comprises MCM-49, MCM-22, MCM-56, or a combination thereof.

3. The catalyst composition of claim 1, wherein the MWW framework structure comprises a silicon to aluminum ratio of 2 to 100.

4. The catalyst composition of claim 1, wherein at least one of the MWW framework structure and the catalyst composition comprises 2.5 wt % or less Sn.

5. The catalyst composition of claim 1, wherein the catalyst composition further comprises a binder.