Patent ID: 8921601
Filing Date: 2014-12-30
Classification: C07C

Abstract:
1. A process for recovering an alkanolamine from a wash stream used to remove acid gases from a gas stream, comprising: introducing a fluid stream comprising water, a linear ether alkanolamine, and up to about 20 wt % carbamate precursor into a reaction zone maintained at a positive pressure and at a temperature of from about 250° F. to about 400° F.; circulating said fluid stream through said reaction zone at a rate to provide a residence time of from about 0.5 to about 1 hour of said fluid stream in said reaction zone to convert at least a portion of said carbamate precursor to said alkanolamine and carbon dioxide and reduce the formation of amine ethers; recovering a product stream from said reaction zone comprising water, carbon dioxide and alkanolamine; recycling a portion of said product stream to said fluid stream to at least partially control the residence time of said fluid stream in said reaction zone.