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:
Aug. 11, 2015
Filed:
Jan. 21, 2014
Huntsman International Llc, The Woodlands, TX (US);
Arend-Jan Zeeuw, Overijse, BE;
Mark Geoffrey Bent, Voorburg, NL;
Huntsman International LLC, The Woodlands, TX (US);
Abstract
According to the present invention, a method of producing DADPM is provided. The method comprises: converting benzene into nitrobenzene thereby providing a nitrobenzene stream and a first aqueous waste stream comprising nitrobenzene; converting said nitrobenzene from said nitrobenzene stream into aniline, thereby providing an aniline stream and a first part of a second aqueous waste stream comprising aniline; removing nitrobenzene from said aniline prior to converting said aniline from said aniline stream into DADPM; converting said aniline from said aniline stream into DADPM thereby providing a second part of said second aqueous waste stream comprising aniline; stripping aniline and nitrobenzene from said first and second aqueous waste stream by means of a stripping column; providing the stripped aniline and nitrobenzene to said aniline cleaning apparatus or to said nitrobenzene stream.