Silica-layered double hydroxides (LDHs) hybrid core shells as new polymerisation supports

Applications: Catalysts, Catalyst Supports, Polymerisation, Olefins, Polyethylene

Oxford scientists have developed novel SiO2 – LDH core-shell microspheres and demonstrated their use as catalyst supports for polymerisation.

Features	Benefits
Synthesis of SiO2 – layered double hydroxides (LDHs) catalyst systems.	Growth of hydrophobic LDH platelets on the outer surface of an amorphous silica particle. Synergistic system where activities exceed that of silica or LDH alone. Demonstrated on olefin polymerisation catalysts, in particular metallocenes. Demonstrated production of polymers, in particular polyethylene. Suitable for slurry or gas-phase processes.
Unique core-shell structure for catalyst support.	Hydrophobic LDH platelets exhibit surface areas and pore volumes nearly two orders of magnitude higher than conventional LDHs. Provides morphological control which can be readily tailored. More active support than conventional silica supports.
LDH grown in situ in the presence of the silica spheres.	Enables growth of the LDH platelets on the surface of the silica rather than just precipitation as a separate phase.

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