US 11,185,853 B2Granted

Catalysts for polycarbonate production

AssigneeSaudi Aramco Technologies Company

InventorScott D. Allen

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Abstract

The present invention provides unimolecular metal complexes having increased activity in the copolymerization of carbon dioxide and epoxides. Also provided are methods of using such metal complexes in the synthesis of polymers. According to one aspect, the present invention provides metal complexes comprising an activating species with catalytic activity tethered to a ligand that is coordinated to the active metal center of the complex.

Claims4

Dependent claims

A metal complex

wherein X is present and an anion.

Dependencies are inferred from the claim text.

Facts

Application: 16/227,396Filed 20 Dec 2018 · us provisional application
Priority: 22 Dec 2017
Published: US 2019/0193062 A127 Jun 2019
Granted: 30 Nov 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B01J 31/2217
Oxygen, e.g. acetylacetonates: at least one oxygen and one nitrogen atom present as complexing atoms in an at least bidentate or bridging ligand
B01J 31/2243
Anionic ligands, i.e. the overall ligand carries at least one formal negative charge: at least one oxygen and one nitrogen atom present as…
C08G 64/34
Using carbon dioxide: and cyclic ethers
B01J 2231/14
Polymerisation reactions involving at least dual use catalysts, e.g. for both oligomerisation and polymerisation: other polymerisation, e.g. of…

Family

Application62/609,649Us provisional application · filed 22 Dec 2017
US 2019/0193062 A1Pre-grant publication · published 27 Jun 2019
US 11,185,853 B2This patent

From the US filing history. Foreign family members aren’t listed.

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