Additive for preserving the fluidity of fluids containing...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 8/52 (2006.01) C09K 8/524 (2006.01) C09K 8/54 (2006.01) E21B 37/06 (2006.01)

Patent

CA 2646737

The present invention relates to the use of a specific group of alkoxylated and/or acylated non-quaternary nitrogen-containing compounds as anti-agglomerants for gas hydrates. The anti-agglomerants are surface-active non-quaternary nitrogen-containing compounds with 1-5 nitrogen atoms, which compounds have at least one hydrophobic group with 6-24 carbon atoms, and where the hydrophobic group is connected to the remainder of the molecule by an amine moiety, an ether moiety or an amide moiety, provided that when the hydrophobic group is connected by means of an amide moiety to the remainder of the molecule, the compounds must contain a total of at least two nitrogen atoms, and optionally contain 1-12 -CH2CH2O- groups and/or 1-6 hydroxyalkyl groups with 3-4 carbon atoms; and which compounds have at least one C2-C3 acyl group and/or at least one hydroxyalkyl group with 3-4 carbon atoms; or a salt thereof. The invention also relates to a method for inhibiting the agglomeration of gas hydrates in a conduit, and compositions comprising the gas hydrate anti-agglomerant, a corrosion inhibitor and/or a paraffin deposition inhibitor.

La présente invention concerne l'utilisation d'un groupe particulier de composés contenant de l'azote non quaternaires alcoxylés et/ou acylés en tant qu'agents antiagglomérants pour des hydrates de gaz. Les agents antiagglomérants sont des composés contenant de l'azote non quaternaires tensioactifs ayant 1-5 atomes d'azote, lesdits composés ayant au moins un groupe hydrophobe ayant 6-24 atomes de carbone, ledit groupe hydrophobe étant relié au reste de la molécule par une entité amine, une entité éther ou une entité amide, à condition que lorsque le groupe hydrophobe est relié au moyen d'une entité amide au reste de la molécule, les composés doivent contenir un total d'au moins deux atomes d'azote, et contiennent éventuellement 1-12 groupes -CH2CH2O- et/ou 1-6 groupes hydroxyalkyles ayant 3-4 atomes de carbone ; et lesdits composés ayant au moins un groupe acyle en C2-C3 et/ou au moins un groupe hydroxyalkyle ayant 3-4 atomes de carbone ; ou un sel de ceux-ci. L'invention concerne également un procédé servant à inhiber l'agglomération d'hydrates de gaz dans une canalisation et des compositions comprenant l'agent antiagglomérant d'hydrates de gaz, un inhibiteur de corrosion et/ou un inhibiteur du dépôt de paraffines.

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