Additives for inhibiting the formation of gas hydrates

Details Additives for inhibiting the formation of gas hydrates Additives for inhibiting the formation of gas hydrates

2007-01-26

2011-10-11

Figueroa, John J (Department: 1765)

Earth boring, well treating, and oil field chemistry

Preventing contaminant deposits in petroleum oil conduits

C507S129000, C507S131000, C507S133000, C507S240000, C507S241000, C507S244000, C507S246000, C507S260000, C507S261000, C507S267000, C514S785000, C585S015000, C560S170000, C422S007000

Reexamination Certificate

active

08034748

ABSTRACT:
The present invention relates to an additive, and its use for inhibiting nucleation, growth and agglomeration of gas hydrates by adding an effective amount of an inhibitor to a multiphasic mixture which tends to hydrate formation and consists of water, gas and optionally condensate, or to a drilling fluid which tends to form gas hydrates. Said inhibitor comprising dialkoxylated quaternary ammonium compounds of the formula 1where R1, R2are each independently radicals of the formulae -(A-O)n—(C)—CO—O—R5, R3is C1- to C30-alkyl or C2- to C30-alkenyl, R4is an organic radical which optionally contains heteroatoms and has from 1 to 100 carbon atoms, R5is an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C1- to C6-alkylene group and X is an anion, are used as gas hydrate inhibitors.

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