Corrosion prevention in gas recovery systems

Claim 1

IN A PROCESS FOR SEPARATING ACIDIC COMPONENTS FROM A GAS MIXTURE WHEREIN SAID MIXTURE IS CONTACTED WITH AN ABSORBENT COMPRISING A COMPOUND SELECTED FROM THE CLASS CONSISTING OF WATER-SOLUBLE ALIPHATIC AMINES AND ALKANOLAMINES WHICH ARE FREE FROM CARBOXYL AND CARBONYL GROUPS AND WHICH BOIL ABOVE 100*C., THE IMPORVEMENT WHICH CONSISTS IN ADDING TO SAID ABSORBENT (1) A METAL SOAP SELECTED FROM THE CLASS CONSISTING OF THE ALKALINEEARTH AND HEAVY METAL SOAPS OF OLI-SOLUBLE PETROLEUM SULFONIC ACIDS AND CARBOXYLIC ACIDS CONTAINING AT LEAST ABOUT 8 CARBON ATOMS AND (2) THE ORGANIC REACTION PRODUCT OBTAINED BY HEATING A MIXTURE ESSENTIALLY COMPRISING AN ALKANOLAMINE CONTAINING BETWEEN 2 AND ABOUT 20 CARBON ATOMS AND A FATTY MATERIAL SELECTED FROM THE CLASS CONSISTING OF FATTY ACIDS CONTAINING AT LEAST ABOUT 8 CARBON ATOMS AND FATTY OIL WHICH CONTAIN FATTY ACID RADICALS CONTAINING AT LEAST ABOUT 8 CARBON ATOMS WHILE DISTILLING WATER FROM THE MIXTURE, SAID HEATING BEING EFFECTED AT SUCH A TEMPERATURE AND FOR SUCH A PERIOD OF TIME THAT SUBSTANTIALLY THE STOICHIOMETRIC AMOUNT OF WATER IS REMOVED, AND SAID METAL SOAP AND SAIDREACTION PRODUCT BEING EMPLOYED IN AMOUNTS SUFFICIENT TO INHIBIT THE CORROSIVE EFFECT OF SAID ABSORBENT ON FERROUS METALS.