Mixtures of hexahydrotriazines useful as H.sub.2 S scavengers

A mixture of amine components comprising at least two of the following amines:

• (i) a hexahydrotriazine of the formula:
• ##STR7## where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• where R.sup.2, R.sup.4 and R6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• (ii) RN.dbd.CHR;
• (iii) R.sub.2 NCH(R')NR.sub.2 ;
• and
• (iv) R.sub.2 NCH(R')OH;
• where R may independently be R.sup.1, R.sup.2, R.sup.3, R.sup.4, RS and R6, and where R' may independently be alkylene radicals equivalent to R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 ;
• and
• where at least one of the groups R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R6 is an alkoxyalkylene group.

A mixture of amines made by reacting at least one amine compound selected from the group consisting of R.sup.1 NH.sub.2 ;

• R.sup.3 NH.sub.2 ;
• R.sub.5 NH.sub.2 and R.sup.7.sub.2 NH with at least one aldehyde compound selected from the group consisting of R.sup.2 CHO, R.sup.4 CHO and R.sup.6 CHO;
• where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and R.sup.7 is independently R.sup.1, R.sup.3 or RS;
• where R.sup.2, R.sup.4 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• where at least one of the R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 groups is an alkoxyalkylene group.

A mixture of amines useful in reducing levels of hydrogen sulfide (H.sub.2 S) in a gaseous or liquid stream containing H.sub.2 S, the mixture comprising a reaction product of

• a hexahydrotriazine of the formula:
• ##STR8## where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• where R.sup.2, R.sup.4 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• a dialdehyde.

A mixture of amine components comprising at least two of the following amines:

• ##STR9## where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• where R.sup.2, R.sup.4 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• (ii) RN.dbd.CHR;
• (iii) R.sup.2 NCH(R')NR.sup.2 ;
• and
• (iv) R.sup.2 NCH(R')OH;
• where R may independently be R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.5, and where R' may independently be alkylene radicals equivalent to R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6;
• and including at least one dialdehyde.

A mixture of amines made by reacting at least one amine compound selected from the group consisting of R.sup.1 NH.sub.2 ;

• R.sup.3 NH.sub.2 ;
• R.sup.5 NH.sub.2 and R.sup.7.sub.2 NH with at least one aldehyde compound selected from the group consisting of R.sup.2 CHO, R.sup.4 CHO and R.sup.6 CHO, in the presence of at least one dialdehyde;
• where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and R.sup.7 is independently R.sup.1, R.sup.3 or R.sup.5 ;
• where R.sup.2, R.sup.4 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms.

A process for making a mixture of amines comprising reacting at least one amine compound selected from the group consisting of R.sup.1 NH.sub.2 ;

• R.sup.3 NH.sub.2 ;
• R.sup.5 NH.sub.2 and R.sup.7.sub.2 NH with at least one aldehyde compound selected from the group consisting of R.sup.2 CHO, R.sup.4 CHO and R.sup.6 CHO;
• where R.sup.1, R.sup.3 and R.sup.5 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• where at least one of the groups is an alkoxyalkylene group;
• and R.sup.7 is independently R.sup.1, R.sup.3 or R.sup.5 ;
• where R.sup.2, R.sup.4 and R.sup.6 are independently selected from the group consisting of hydrogen and an alkyl radical, including substituted alkyl radicals, of 1 to 5 carbon atoms;
• and
• where at least one of the R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 groups is an alkoxyalkylene group.