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US 11,896,965 B2Granted
Chromium complex and catalyst therefrom
AssigneeDow Global Technologies LLC
InventorsJerzy Klosin, Kara A. Milbrandt, Scott D. Boelter, David R. Wilson, Mari S. Rosen, Dean M. Welsh, Peter M. Margl, Kyoung Moo Koh, David M. Pearson, Rafael Huacuja
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Abstract
The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.
Claims9
A catalyst comprising a) a source of chromium;
- b) an activator;
- and c) a phosphacycle-containing ligating compound of the formula (II):
- wherein each R5 is independently H, halogen, C1-4 substituted or unsubstituted alkyl, C6-10 substituted or unsubstituted aryl.
Dependencies are inferred from the claim text.