Cpc Corporation, Taiwan

Amt International Inc.

Jeffrey Tsung-Min Chiu

Fu-Ming Lee

Kuang-Yeu Wu

Tzong-Bin Lin

Jyh-Haur Hwang

Jeng-Cheng Lee

Yu-Ming Wu

Han-Tjen Jan

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.

Regeneration of selective solvents for extractive processes

Growing community of inventors

Taipei, Taiwan

Jeffrey Tsung-Min Chiu