US 12,747,195 B2Granted

Oligomerization with ion-exchanged zeolites

AssigneeExxonmoil Technology and Engineering Company

InventorsTakayuki Iida, Michael A. Marella, Suzzy C. Ho, Gerardo J. Majano, Michael P. Lanci, Trong Pham

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Abstract

Catalysts and corresponding methods for oligomerization of olefins to distillate boiling range compounds are provided. The oligomerization can be performed in the presence of a catalyst including a 10-member ring or 1-D 12-member ring zeolitic framework material that contains both silica and alumina. The zeolitic framework material can have a low molar ratio of silica to alumina. The zeolitic framework material can be ion-exchanged to a small but substantial degree with alkaline earth metal cations, such as Mg, Ca, Sr, or Ba. The small but substantial amount of ion exchange can correspond to having a molar ratio of alkaline earth metal to aluminum of up to 0.2.

Claims18

Dependent claims

A method for oligomerizing olefins, comprising:

exposing a feed comprising C2 to C12 olefins to an oligomerization catalyst comprising an alkaline earth metal ion-exchanged zeolitic framework material under oligomerization conditions to form an oligomerized effluent comprising a diesel boiling range fraction,
wherein the alkaline earth metal ion-exchanged zeolitic framework material comprises silica and alumina, the alkaline earth metal ion-exchanged zeolitic framework material comprising a molar ratio of alkaline earth metals to aluminum of 0.005 to 0.08, and
wherein the alkaline earth metal ion-exchanged zeolitic framework material comprises a 10-member ring zeolitic framework structure, a 1-D 12-member ring zeolitic framework structure, or a combination thereof.

Dependencies are inferred from the claim text.

Facts

Application: 18/649,059Filed 29 Apr 2024 · us provisional application
Priority: 5 May 2023
Published: US 2024/0368057 A17 Nov 2024
Granted: 29 Sep 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

C07C 2/12
Catalytic processes: with crystalline alumino-silicates or with catalysts comprising molecular sieves
B01J 29/7026
Of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65: mFS-type, e.g. ZSM-57
B01J 29/7034
Of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65: mTW-type, e.g. ZSM-12, NU-13, TPZ-12 or Theta-3
B01J 29/7046
Of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65: mtt-type, e.g. zsm-23, kz-1, isi-4 or eu-13