Chemical installation for the production of Diaminodiphenylmethane

摘要

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.