The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2016
Filed:
Dec. 06, 2012
Amt International, Inc., Plano, TX (US);
Cpc Corporation, Taiwan, Taipei, TW;
Fu-Ming Lee, Katy, TX (US);
Tzong-Bin Lin, Chia-Yi, TW;
Kuang-Yeu Wu, Plano, TX (US);
Jyh-Haur Hwang, Chia-Yi, TW;
Jeffrey Tsung-Min Chiu, Taipei, TW;
Jeng-Cheng Lee, Chia-Yi, TW;
Yu-Ming Wu, Chia-Yi, TW;
Han-Tjen Jan, Chia-Yi, TW;
AMT International, Inc., Plano, TX (US);
CPC Corporation, Taiwan, Taipei, TW;
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.