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. 08, 1981
Filed:
Nov. 15, 1979
Robert P Cox, Wyckoff, NJ (US);
Norbert R Tarradellas, Basrah, IQ;
The Lummus Company, Bloomfield, NJ (US);
Abstract
An off-gas from a process for producing styrene from ethylbenzene, which contains non-condensables; in particular, hydrogen, as well as some aromatics; in particular, ethylbenzene, is contacted with a higher boiling absorption oil to scrub aromatics from the off-gas and provide an off-gas essentially free of aromatics. The absorption step is employed as a final treatment of the off-gas; i.e., subsequent to initial treatment of the off-gas by chilling and/or ethylbenzene scrubbing to initially reduce the aromatics content thereof. A preferred absorption oil is the heavy byproducts obtained from a process for producing ethylbenzene, which contains polyethylbenzenes.