Water treatment method

A method of causing flocculation of immiscible material in aqueous suspension which comprises adding to said aqueous suspension a flocculatingly effective amount of a compound or mixture of compounds having the formula:

• ##STR22## wherein (I), R' and R" are the same or different alkyl groups of from 1 to 18 carbon atoms optionally substituted by from 1 to 2 hydroxyl groups or (II) R' and R" together with N form a 5 to 7 membered N-heterocyclic ring, or (III) R' and R" together with N and an oxygen atom form a N-morpholino group;
• and wherein (I) R"', R.sup.IV and R.sup.V may be the same or different alkyl groups of from 1 to 18 carbon atoms optionally substituted by from 1 to 2 hydroxyl groups, or (II) R"' is a lower alkyl group of from 1 to 4 carbon atoms and R.sup.IV and R.sup.V taken together with N represent a 5 to 7 membered heterocyclic ring;
• or (III) R"' is a lower alkyl group of from 1 to 4 carbon atoms and R.sup.IV and R.sup.V taken together with N and an oxygen atom represent the N-morpholino group;
• n is an integer of from 2 to 20;
• and X is a halogen atom of an atomic weight greater than 30.

A method of causing flocculation of immiscible material in aqueous suspension which comprises adding to said aqueous suspension a flocculatingly effective amount of a compound or mixture of compounds having the formula:

• ##STR23## wherein (I), R' and R" are the same or different alkyl groups of from 1 to 18 carbon atoms optionally substituted by from 1 to 2 hydroxyl groups (II) R' and R" together with N form a 5 to 7 membered N-heterocyclic ring, or (III) R' and R" together with N and an oxygen atom form a N-morpholino group;
• and wherein (I) R"', R.sup.IV and R.sup.V may be the same or different alkyl groups of from 1 to 18 carbon atoms optionally substituted by from 1 to 2 hydroxyl groups, or (II) R"' is a lower alkyl group of from 1 to 4 carbon atoms and R.sup.IV and R.sup.V taken together with N represent a 5 to 7 membered heterocyclic ring;
• or (III) R"' is a lower alkyl group of from 1 to 4 carbon atoms and R.sup.IV and R.sup.V taken together with N and an oxygen atom represent the N-morpholino group;
• n is an integer of from 2 to 20;
• and X is a halogen atom of an atomic weight greater than 30.