Back to results
US 2025/0100951 A1Published application
Selective and long-lived single component heterogeneous ethylene trimerization catalysts enabled by surface lithiation
AssigneeUchicago Argonne, LLC
InventorsDavid Kaphan, Massimiliano Delferro, Uddhav Ajay Kanbur, Cong Liu
Life of this patent
Estimating the term…
Abstract
A catalyst for selective hexane and/or butene formation from ethylene. The catalyst is formed by grafting Cr or Mn to an inorganic support. The grafted metal site is reduced, forming a catalyst that is selective for selective trimerization of ethylene to hexene and/or butene.
Claims19
A method, comprising:
- interacting a metal precursor having Cr or Mn with an inorganic support;
- grafting a metal site comprising Cr or Mn on the inorganic support;
- reducing the metal site by exposure to a metal reductant;
- and
- forming a reduced metal site on the inorganic support, the reduced metal site being catalytically active in oxidative cyclization of ethylene via metallacycle intermediates
2 more elements
A catalyst comprising:
- a support comprising lithium titanate, SiO2, MgO, Al2O3, or carbon;
- and
- a reduced metal site comprising a transition metal selected from the group consisting of Cr, Mn, Ti, V, Fe, Co, Ni, Ta, and W grafted to the support.
A method of ethylene trimerization comprising:
- interacting ethylene with a catalyst comprising a reduced metal site on an inorganic support;
- and
- oligomerizing the ethylene, forming a mixture of hexene and butene.
Dependencies are inferred from the claim text.