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US 7,140,433 B2Granted
Diamine terminated primary amine-aldehyde sulfur converting compositions and methods for making and using same
AssigneeClearwater International, LLC
InventorsLarry W. Gatlin, Daniel R. Dostie, Timothy Eric Gatlin
Life of this patent
Estimating the term…
Abstract
A new class of sulfur scavenging or converting compositions is disclosed comprising diamine terminated, amine-aldehyde adducts, where the adducts are substantially bimolecular amine-aldehyde adducts and the composition is substantially free of trimer and/or triazines. Methods for making and using the new class of sulfur scavenging or converting composition are also disclosed.
Claims21
A method comprising the step of:
- contacting a fluid or fluid stream including noxious sulfur species with an effective amount of a sulfur scavenging or converting composition including a compound of formula (I):
- where R is an alkenyl group having between about 1 and about 20 carbon atoms, where one or more of the carbon atoms can be oxygen atoms in the form of ether, hydroxy or carboxy moieties and/or nitrogen atoms in the form of tertiary amine or amide moieties or amide moieties, R′ and R″ are the same or different carbon-containing groups having between about 1 and about 20 carbon atoms, where one or more of the carbon atoms can be oxygen atoms in the form of ether, hydroxy or carboxy moieties and/or nitrogen atoms in the form of tertiary amine moieties or amide moieties, where k, l, m and n are integers having a value between 0 and 2, provided that at least one has a value of 1 or 2, where the compounds of formula (I) are formed by reacting a substantially bimolecular reaction product of an amine and an aldehyde formed while maintaining the temperature below the boiling point of the amine with a sufficient amount of a diamine so that the composition does not liberate aldehyde upon heating and includes no or only trace amounts of triazines, and where the effective amount is sufficient to reduce, to reduce below a target level or to substantially eliminate the noxious sulfur species.
A method comprising the step of:
- injecting, into a fluid or fluid stream including noxious sulfur species, an effective amount of a sulfur scavenging or converting composition comprising a diamine terminated reaction product of at least one aldehyde with at least one primary amine, where the reaction product includes substantially bimolecular amine-aldehyde adducts formed while maintaining the temperature below the boiling point of the amine and where the diamine is present in a sufficient amount so that the composition does not liberate aldehyde upon heating and includes no or only trace amounts of triazines.
A method comprising the step of:
- injecting an effective amount of a sulfur scavenging or converting composition comprising a diamine terminated reaction product of at least one aldehyde with at least one primary amine, where the reaction product includes substantially bimolecular amine-aldehyde adducts formed while maintaining the temperature below the boiling point of the amine into fluids in an oil or gas well via capillary coiled tubing and where the diamine is present in a sufficient amount so that the composition does not liberate aldehyde upon heating and includes no or only trace amounts of triazines.
A method comprising the step of:
- treating a fluid or fluid stream including noxious sulfur species with an effective amount of a sulfur scavenging or converting composition comprising a diamine terminated reaction product of at least one aldehyde with at least one primary amine, where the reaction product includes substantially bimolecular amine-aldehyde adducts formed while maintaining the temperature below the boiling point of the amine and where the diamine is present in a sufficient amount so that the composition does not liberate aldehyde upon heating and includes no or only trace amounts of triazines.
Dependencies are inferred from the claim text.