Uop Lcc

Joseph A Faucher

Daniel J Kubek

John G McCullough

Kenneth J Barr

A novel alkanolamine gas treating composition and method for purifying a gas stream containing acid gas impurities. The composition consists essentially of an alkanolamine solvent in an aqueous solution with antimony wherein said alkanolamine solvent includes at least about 1% by weight of methydiethanolamine (MDEA) and at least about 5% monoethanolamine (MEA) by weight of the total solution, and with said antimony present in a concentration of at least about 100 ppm. The combination of antimony and MDEA inhibits corrosion and retards solvent degradation.

Alkanolamine gas treating composition and process

A process for the purification of a gas stream containing impurities comprising (i) passing the gas stream through an aqueous solution of stabilized monoethanolamine or diethanolamine in such a manner that the impurities are absorbed into the monoethanolamine solution or diethanolamine solution to form a rich solution and (ii) regenerating the monoethanolamine or diethanolamine solvent from the rich solution so as to remove the impurities, (iii) recycling the solvent into the aqueous solution in a closed loop and introducing a stabilizer into the recirculating solvent solution in an amount of about 4 to about 25 percent by weight based on the total weight of solution, the stabilizer being methyldiethanolamine.

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Carlsbad, CA, United States of America

Joseph A Faucher