Patent ID: 9133407
Filing Date: 2015-09-15
Classification: B01D,C10L

Abstract:
1. A process for removal of gaseous contaminants from a gas stream, the process comprising: contacting the gas stream with an amine-based wash solution to remove gaseous acidic components from the gas stream by absorption into the amine-based wash solution to form a first spent wash solution and a gas stream depleted of acidic components; and contacting the gas stream depleted of acidic components with one or more aqueous wash solutions to remove water soluble contaminants and form a second spent wash solution and a gas stream depleted of acidic components and water soluble contaminants, wherein at least a portion of the second spent wash solution is fed to a separation device for separating and removing the water soluble contaminants from the portion of the second spent wash solution; wherein after removal of the water soluble contaminants, the treated second spent wash solution is recirculated with the amine-based wash solution and/or the aqueous wash solution; and regenerating the first and second spent wash solutions in a regeneration unit to form a regenerated wash solution and a gas stream of the acidic components, wherein the regeneration unit has a temperature profile and configuration such that the water soluble contaminants remain in the regenerated wash solution.