SiO2-layered double hydroxide microspheres and their use as catalyst supports in ethylene polymerisation
US10221259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2016 |
| Grant date | Mar 5, 2019 |
| Priority date | — |
| Expiry date | Jan 20, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F4/65927
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst system is provided which comprises a solid support material having, on its surface, one or more catalytic transition metal complex wherein the solid support material comprises SiO2@AMO-LDH microspheres having the formula I: (i) wherein, Mz+ and M′y+ are two different charged metal cations; z=1 or 2; y=3 or 4; 0<x<0.9; b is 0 to 10; c is 0.01 to 10, preferably >0.01 and <10; p>0 q>0; Xn− is an anion with n>0, preferably 1−5a=z(1−x)+xy−2; and the AMO-solvent is an 100% aqueous miscible organic solvent. Preferably, M′ in the formula I is Al. Preferably, M in the formula I is Li, Mg or Ca. The catalyst system has use in the polymerization and/or copolymerization of at least one olefin to produce a homopolymer and/or copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.