Gas hydrate inhibitors

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

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

Patent

CA 2496117

A method for inhibiting formation of hydrocarbon hydrates in mixtures of water and a hydrate-forming guest molecule involves adding a reaction product to the mixtures in an effective amount to inhibit formation of the hydrocarbon hydrates under conditions otherwise effective to form the hydrocarbon hydrates in the absence of the reaction product. The product is made by the reaction of first reactant that is an amine or polyamine, or alcohol or polyalcohol, with a second, aldehyde reactant and a third reactant that is an alcohol or polyalcohol or, an amide or polyamide. Preferably, if the first and third reactants are both an alcohol or both a polyalcohol, they are not the same. A non-limiting example of a suitable amine would be a fatty alkyl amine, while formaldehyde would be a non-limiting of a suitable aldehyde and polyacrylamide would be a suitable third reactant.

L'invention concerne un procédé visant à inhiber la formation d'hydrates d'hydrocarbure dans des mélanges d'eau et de molécule hôte à capacité de formation d'hydrate, qui consiste à ajouter un produit de réaction aux mélanges en quantité efficace pour inhiber la formation des hydrates d'hydrocarbure, dans des conditions par ailleurs efficaces pour la formation d'hydrates d'hydrocarbure en l'absence de produit de réaction. Il s'agit d'une réaction entre un premier réactif amine ou polyamine, ou bien alcool ou polyalcool, avec un second réactif aldéhyde et un troisième réactif alcool ou polyalcool, ou bien amide ou polyamide. De préférence, si les premier et troisième réactifs sont tous les deux alcool ou tous les deux polyalcool, ils ne sont pas identiques. Un exemple non limitatif d'amine appropriée serait amine alkyle grasse, et formaldéhyde serait un exemple non limitatif d'aldéhyde approprié tandis que polyacrylamide serait un troisième réactif approprié.

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