Patent ID: 7140433

Claim:
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.