| 摘要 |
PROBLEM TO BE SOLVED: To provide a regeneration process for converting an oxazolidone such as hydroxypropyloxazolidone (HPOZD) to an alkanolamine such as diisopropanolamine (DIPA) and CO<SB>2</SB>. SOLUTION: An amine stream containing HPOZD joins a stream that includes a caustic solution. The combined stream is passed to a tank. In this tank, HPOZD reacts with the caustic to convert it to DIPA and CO<SB>2</SB>. After the reaction is completed, the mixture is left to stand which results in virtually complete separation of the amine phase (containing DIPA and water) from the caustic phase. After an appropriate standing interval, a portion of the caustic phase is drawn from the reaction mixture as a waste/neutralization stream while the other portion of the caustic phase and a very small portion of the amine phase are sent to a recycle tank for use in subsequent reaction steps. The majority of the amine phase is treated using ion exchange resins to remove excess cations from the amine and clean amine is returned to the amine system. COPYRIGHT: (C)2008,JPO&INPIT
|
