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:
Jul. 01, 2014
Filed:
Nov. 04, 2011
Kuang-yeu Wu, Plano, TX (US);
Adam T. Lee, Dallas, TX (US);
Karl Tze-tang Chuang, Edmonton, CA;
Hung-chung Shen, Chia-Yi, TW;
Tzong-bin Lin, Chia-Yi, TW;
Kuang-Yeu Wu, Plano, TX (US);
Adam T. Lee, Dallas, TX (US);
Karl Tze-Tang Chuang, Edmonton, CA;
Hung-Chung Shen, Chia-Yi, TW;
Tzong-Bin Lin, Chia-Yi, TW;
AMT International Inc., Plano, TX (US);
CPC Corporation, Taipei, TW;
Abstract
The invention disclosed relates to a process for refining a hydrocarbon feed to make substantially styrene-free C6-C8 aromatic hydrocarbons (BTX). The hydrocarbon feed, for example, unhydrotreated pyrolysis gasoline, is distilled to make a BTX rich stream containing styrene which is fractionated to separate C6 and C7 hydrocarbons from C8 hydrocarbons including styrene. Styrene in the C8 hydrocarbons reacts in the presence of a selective etherification catalyst with a C1-C3 lower alkyl alcohol to form the corresponding styrene ether, which is then separated by distillation into a styrene ether stream and a C8 hydrocarbons rich stream. The C8 hydrocarbons rich stream is then re-mixed with the C6 and C7 hydrocarbons, and sent to hydrogenation reactors to remove sulphur and olefinic hydrocarbons to form substantially styrene-free BTX.