Diamine terminated primary amine-aldehyde sulfur converting compositions and methods for making and using same

A method for preparing sulfur scavenging compositions including the steps of:

• slowly adding an excess of at least one aldehyde to a solution including at least one primary amine, while maintaining a temperature of the solution at about 40° F. to form an amine-aldehyde composition comprising ≧80 wt. % of bimolecular amine-aldehyde adducts;
• and
• step-wise addition of at least one diamine to the product of the previous step to form a composition comprising at least one substituted diamine compound having the general formula (I):
• where:
• N—R—N moiety is derived from a diamine,
• R′CH moieties are derived from an aldehyde,
• R″N moieties are derived from a primary amine,
• R is an alkenyl group, cycloalkenyl or arenyl 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 carboxy, hydroxy, and/or ether moieties and/or nitrogen atoms in the form of tertiary amine and/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 carboxy, hydroxy and/or ether moieties or nitrogen atoms in the form of tertiary amine and/or nitrogen-containing groups in the form of amide moieties,
• k, l, m and n are integers, each having a value ranging from 1 to 2,
• the composition liberates substantially no aldehyde upon heating,
• the composition includes no or only trace amount of triazines and
• the composition has a tri-phasic partitioning property so that the composition has a sufficient partitioning concentration in a tri-phase system comprising a gas phase, a hydrocarbon phase and an aqueous phase reducing noxious sulfur species, reducing to a given level noxious sulfur species or reducing below a given detectable limit noxious sulfur species simultaneously in all three phases of the tri-phase system.

A composition for converting noxious sulfur species to high molecular weight sulfur species comprising an effective amount of at least one compound having the general formula (I):

• where:
• N—R—N moiety is derived from a diamine,
• R′CH moieties are derived from an aldehyde,
• R″N moieties are derived from a primary amine,
• R is an alkenyl group, cycloalkenyl or arenyl 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 carboxy, hydroxy and/or ether moieties and/or nitrogen atoms can be in the form of tertiary amine 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 carboxy, hydroxy and/or ether moieties or nitrogen atoms in the form of tertiary amine and/or nitrogen-containing groups in the form of amide moieties,
• the effective amount is between about 1 ppm and about 500 ppm of the at least one compound of formula (I), and
• the composition liberates substantially no aldehyde upon heating,
• the composition includes no or only trace amount of triazines and
• the composition has a tri-phasic partitioning property so that the composition has a sufficient partitioning concentration is tri-phase system comprising a gas phase, a hydrocarbon phase and an aqueous phase reducing noxious sulfur species, reducing to a given level noxious sulfur species or reducing below a given detectable limit noxious sulfur species simultaneously in all three phases of the tri-phase system.

A sulfur scavenging composition comprising an effective amount of a substituted diamine including 4 substituents, two covalently bonded to each of the nitrogen atoms of the diamine, where ≧90% of the substituents are bimolecular amine-aldehyde adducts having the general formula —CHR′—NHR″ or —CHR′—NR″—CHR′—NHR″, where the adducts are prepared by a slow addition of an excess of an aldehyde to a primary amine, where the CHR′ moieties are derived from the aldehyde, while maintaining a temperature of the solution at about 40° F., where the NR″ moiety is or the NR″ and the NHR″ moieties are derived from the primary amine, where R′ is a hydrogen atom (H) or a linear or branched alkyl, aryl, alkaryl, or aralkyl 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 carboxy, hydroxy and/or ether moieties and/or nitrogen atoms can be in the form of tertiary amine or amide moieties, where one or more of the hydrogen atoms can be replaced by fluorine atoms and/or chlorine atoms, where R″ is a linear or branched alkyl, aryl, alkaryl, or aralkyl group having between about 1 and about 20 carbon atoms, and where one or more of the carbon atoms can be oxygen atoms in the form of carboxy, hydroxy and/or ether moieties and/or nitrogen atoms can be in the form of tertiary amine or amide moieties, and one or more of the hydrogen atoms can be replaced by a fluorine atom or chlorine atom and where the composition liberates substantially no aldehyde upon heating, where the composition includes no or only trace amount of triazines, where the effective amount of the substituted diamine is between about 1 ppm and about 500 ppm, and where the composition has a tri-phasic partitioning property so that the composition has a sufficient partitioning concentration in a tri-phase system comprising a gas phase, a hydrocarbon phase and an aqueous phase reducing noxious sulfur species, reducing to a given level noxious sulfur species or reducing below a given detectable limit noxious sulfur species simultaneously in all three phases of the tri-phase system.

A sulfur scavenging composition comprising an effective amount of a substituted diamine including 4 substituents, two covalently bonded to each of the nitrogen atoms of the diamine, where ≧90% of the substituents are bimolecular amine-aldehyde adducts having the general formula —CHR′—NHR″, where the adducts are prepared by a slow addition of an excess of an aldehyde to a primary amine, while maintaining a temperature of the solution at about 40° F., where the R′CH moiety is derived from an aldehyde, where the R″N moiety is derived from a primary amine, where a sufficient amount of diamine is used to substantially eliminate aldehyde liberation upon heating, where R′ is a hydrogen atom (H) or a linear or branched alkyl, aryl, alkaryl, or aralkyl 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 carboxy, hydroxy and/or ether moieties and/or nitrogen atoms can be in the form of tertiary amine or amide moieties, where one or more of the hydrogen atoms can be replaced by fluorine atoms and/or chlorine atoms, where R″ is a linear or branched alkyl, aryl, alkaryl, or aralkyl group having between about 1 and about 20 carbon atoms and where one or more of the carbon atoms can be oxygen atoms in the form of carboxy, hydroxy and/or ether moieties and/or nitrogen atoms can be in the form of tertiary amine or amide moieties, and one or more of the hydrogen atoms can be replaced by a fluorine atom or chlorine atom, where the effective amount of the substituted diamine is between about 1 ppm, where the composition includes no or only trace amount of triazines and where the composition has a tri-phasic partitioning property so that the composition has a sufficient partitioning concentration is tri-phase system comprising a gas phase, a hydrocarbon phase and an aqueous phase reducing noxious sulfur species, reducing to a given level noxious sulfur species or reducing below a given detectable limit noxious sulfur species simultaneously in all three phases of the tri-phase system.