Method Of Preparing Functional Polymers

A method of producing a functional polymer comprising:

• providing a polymer comprising an amine group on a surface of the polymer and a macrocycle comprising a carboxyl group on a surface of the macrocycle;
• mixing the polymer and the macrocycle;
• and
• reacting the polymer and the macrocycle to form an amide bond between the polymer and the macrocycle thereby forming the functional polymer.

A method comprising:

• introducing into a fiber bundle contactor a hydrocarbon comprising mercaptan sulfur, an aqueous caustic solution, and an oxidizer, wherein the fiber bundle contactor comprises a flow path defined by a conduit, a functional polymer disposed in the conduit, and an inlet allowing fluid flow into the flow path, wherein the functional polymer comprises a polymer and a macrocycle grafted to the polymer;
• reacting at least a portion of the mercaptan sulfur and the aqueous caustic solution to produce a mercaptide;
• and
• reacting the mercaptide and the oxidizer in the presence of the functional polymer to produce a disulfide oil.

A method comprising:

• providing a functional polymer comprising a polymer and a macrocycle grafted to the polymer;
• contacting the functional polymer with a solution comprising metal ions;
• and
• adsorbing at least a portion of the metal ions with the functional polymer.