SUPPRESSION OF FOAMING OF AMINE SOLUTION IN AMINE TREATING APPARATUS

摘要

PROBLEM TO BE SOLVED: To remove a substance causing foaming, suppress foaming of an amine solution and carry out stable operation of whole purification apparatus by treating an alkanolamine solution after chemical absorption treatment with an anion exchange resin before recycling the alkanolamine solution to hydrogen sulfide treating process. SOLUTION: When removing hydrogen sulfide from a gas (sour gas) containing hydrogen sulfide generated in petroleum purification process or LPG gas containing hydrogen sulfide by chemical absorption with a solution of an alkanol amine such as monoethanolamine, the alkanolamine solution after chemical absorption treatment is treated with an anion exchange resin such as a resin having a basic group such as a (substituted) amino group before recycling the alkanolamine solution after chemical absorption treatment to a hydrogen sulfide treating process. Furthermore, it is preferably to provide a process for treating the alkanolamine solution with the anion exchange resin in a recycle line of process for removing hydrogen sulfide by chemical absorption or in its bypass line.