Additives for inhibiting gas hydrate formation

US6369004B1 · kind B1 · utility

Assignees

• Clariant Corporation · DE
• RF-Rogaland Research · NO

Inventors

• Peter Klug · Großostheim, DE
• Malcolm Andrew Kelland · Egersund, NO

Key dates

• Filing date: Nov 24, 1997
• Grant date: Apr 9, 2002
• Expiry date: Nov 24, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/0391
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An additive for inhibiting the formation of gas hydrates in connection with hydrocarbon production and transportation comprising the water-soluble polymers comprising structural elements of the formula whereineach R is independently H or C1-C5-alkyl;X is H, an alkaline or earth alkaline metal or a quaternary ammonium group;R1 is H or C1-C18-alkyl; and R2 is C1-C18-alkyl;and wherein the alkyl groups represented by R1 and R2 optionally carry a hydroxy or amino substituent; and, optionally, a minor proportion of structural elements of the formula wherein R, R1, R2 and X may have the meaning as above, and Alk is a C1-C5-alkylene chain.