US 12,071,502 B2
Method of making an ethylene-propylene copolymer
Mamdouh A. Al-Harthi, Dhahran (SA); Sung-Gil Hong, Seoul (KR); Hassam Mazhar, Dhahran (SA); and Farrukh Shehzad, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA); and S-Oil Corporation, Seoul (KR)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA); and S-Oil Corporation, Seoul (KR)
Filed on Oct. 20, 2022, as Appl. No. 17/970,011.
Prior Publication US 2024/0132635 A1, Apr. 25, 2024
Prior Publication US 2024/0228677 A9, Jul. 11, 2024
Int. Cl. C08F 4/02 (2006.01); C08F 2/34 (2006.01); C08F 4/6592 (2006.01); C08F 4/76 (2006.01); C08F 210/16 (2006.01)
CPC C08F 4/76 (2013.01) [C08F 2/34 (2013.01); C08F 4/6592 (2013.01); C08F 210/16 (2013.01); C08F 2800/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of making an ethylene-propylene (EP) copolymer, comprising:
immobilizing a metallocene catalyst complex on a layered double hydroxide (LDH) to form a supported metallocene catalyst complex;
mixing the supported metallocene catalyst complex in a nonpolar solvent to form a first mixture;
degassing the first mixture and saturating with a gaseous mixture of ethylene and propylene to form a second mixture;
mixing an aluminoxane activator with the second mixture to initiate a polymerization reaction of the ethylene and propylene to form a reaction mixture comprising the ethylene-propylene copolymer; and
separating the ethylene-propylene copolymer from the reaction mixture;
wherein the LDH is at least one selected from the group consisting of a NiFe LDH, a ZnAl LDH, a MgAl LDH, a MgFe LDH, and a NiAl LDH; and
wherein the LDH has an intercalating anion selected from the group consisting of a carbonate anion, a carbonate/acetone anion, a nitrate anion, and a dodecyl sulfate (DDS) anion.