Patent ID: 11891570
Assignee: NOURYON CHEMICALS INTERNATIONAL B.V.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 0:
1. A process for treating a subterranean earth formation by introducing a buffered acidizing treatment fluid comprising a monovalent salt of monochloroacetic acid and at least one acid into the subterranean earth formation, wherein the pH of the buffered acidizing treatment fluid is from about 1.2 to about 5,
wherein an element to suppress salt precipitation is also introduced into the subterranean earth formation and
wherein the element to suppress salt precipitation is
a chelating agent comprising at least one monovalent carboxylate salt group and furthermore comprises a carbon chain carrying at least five hydroxyl groups, and/or
a scale inhibitor comprising a homopolymer of maleic acid or acrylic acid or a copolymer of maleic acid and acrylic acid, having a total number of carboxyl groups between 5 and 200, or a salt thereof, wherein the homopolymer or copolymer optionally comprises one or more phosphonic or sulfonic functional groups, and wherein total number of carboxyl groups is calculated from the weight average molecular weight of the homopolymer or copolymer as determined by size exclusion chromatography relative to polymethacrylic acid standards.