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1. (WO2013126131) REGENERATION OF SELECTIVE SOLVENTS FOR EXTRACTIVE PROCESSES

Pub. No.:    WO/2013/126131    International Application No.:    PCT/US2012/069953
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Sat Dec 15 00:59:59 CET 2012
IPC: C10G 21/28
C07C 7/08
C07C 7/10
C10G 7/08
B01D 3/40
B01D 11/00
Applicants: AMT INTERNATIONAL, INC.
CPC Corporation, Taiwan
Inventors: LEE, Fu-Ming
LIN, Tzong-Bin
WU, Kuang-Yeu
HWANG, Jyh-Haur
CHIU, Jeffrey, Tsung-Min
LEE, Jeng-Cheng
WU, Yu-Ming
JAN, Han-Tjen
Title: REGENERATION OF SELECTIVE SOLVENTS FOR EXTRACTIVE PROCESSES
Abstract:
Recovering a polar hydrocarbon (HC) selective solvent substantially free of hydrocarbons (HCs) and other impurities from a lean solvent stream containing the selective solvent, measurable amounts of heavy aromatic HCs, and polymeric materials that are generated in an extractive distillation (ED) or liquid-liquid extraction (LLE) process. At least a portion of the lean solvent stream is contact in a solvent clean-up zone with a slip stream from the HC feed stream of the ED or LLE process or an external stream. The HC feed stream, such as pyrolysis gasoline or reformate, contains significant amounts of benzene and at least. 50 % polar (aromatic) HCs and serves as a displacement agent to remove the heavy HCs and polymeric material from the lean solvent, stream. A magnetic filter can be used to remove the paramagnetic contaminants from the lean solvent.