Patent ID: 8916719
Filing Date: 2014-12-23
Classification: C07D,F01K

Abstract:
1. A method for treating an off-gas stream from a process for producing furan-2,5-dicarboxylic acid, the method comprising: (a) providing an off-gas stream comprising an acetic acid vapor, water vapor, and an inert gas from a primary oxidation zone of a process for producing furan-2,5-dicarboxylic acid; (b) passing the off-gas stream to a solvent recovery zone to condense and separate at least a portion of the organic acid solvent vapor and the water vapor to obtain a water-rich stream, a solvent-rich stream, and a high-energy inert gas stream; (c) passing the high-energy inert gas stream to a power recovery zone to convert the high-energy inert gas stream to a low-energy inert gas stream and to generate an electrical power stream; (d) passing the electrical power stream to a compression zone to convert a low-pressure gas stream comprising oxygen into a high-pressure gas stream comprising oxygen; (e) passing the low-energy inert gas stream and a stream comprising an oxidizable fuel and oxygen to a thermal oxidation zone to combust at least a portion of organic compounds in the low-energy inert gas stream and generate a thermal oxidation gas stream; and (f) passing the thermal oxidation gas stream to a scrubbing zone to generate a treated off-gas stream and a liquid scrubbing effluent stream comprising water; wherein said process for producing furan-2,5-dicarboxylic acid yield is greater than 90%.