公开(公告)号：US11649396B2

公开(公告)日：2023-05-16

申请号：US16972823

申请日：2019-06-03

Applicant: BASF SE

Inventor： Bjoern Langlotz ,  Christian Bittner ,  Stefan Stein

IPC: C09K8/588 ,  C08F220/56 ,  C08K5/42 ,  E21B43/16 ,  C09K8/035

CPC classification number: C09K8/588 ,  C08F220/56 ,  C08K5/42 ,  C09K8/035 ,  C08F220/56 ,  C08F220/06 ,  C08F220/34

Abstract: The present invention relates to a process for the preparation of a water-soluble copolymer comprising the step of reacting a monomer (a) of formula (I), wherein Q1, Q2, R1 to R7 and X have the meaning as indicated in the description and claims with at least one monoethylenically unsaturated, anionic monomer (b), preferably representing a monoethylenically unsaturated monomer comprising at least one carboxy, phosphonate or sulfonate group and salts thereof, preferably their ammonium salts or alkaline-earth metal salts or alkali metal salts; and at least one monoethylenically unsaturated, non-ionic monomer (c). The present invention further relates to a copolymer obtainable by said process and its use in enhanced oil recovery (EOR), a formulation comprising said copolymer and a method of oil production uses said formulation.

公开(公告)号：US11613686B2

公开(公告)日：2023-03-28

申请号：US15734557

申请日：2019-06-03

Applicant: BASF SE

Inventor： Bjoern Langlotz ,  Christian Bittner ,  Stefan Stein

IPC: C08F220/56 ,  C08K5/42 ,  C09K8/035 ,  C08F2/10 ,  C08F293/00 ,  C09K8/588

Abstract: The present invention relates to a process for the preparation of a water-soluble copolymer comprising the step of reacting a monomer (a) of formula (I), (1) wherein Q1, Q2, R1 to R7 and X have the meaning as indicated in the description and claims with at least one monoethylenically unsaturated, anionic monomer (b), preferably representing a monoethylenically unsaturated monomer comprising at least one carboxy, phosphonate or sulfonate group and salts thereof, preferably their ammonium salts or alkaline-earth metal salts or alkali metal salts; and at least one monoethylenically unsaturated, non-ionic monomer (c). The present invention further relates to a copolymer obtainable by said process and its use in enhanced oil recovery (EOR), a formulation comprising said copolymer and a method of oil production uses said formulation.