Huntsman International LLC

Mark Geoffrey Bent

Arend-Jan Zeeuw

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.

Method for producing DADPM

According to the present invention, a chemical installation is provided. The chemical installation comprises A first unit for providing a first aqueous waste stream comprising nitrobenzene; At least a second unit for providing a second aqueous waste stream comprising aniline. The chemical installation comprises an aniline cleaning apparatus for removing nitrobenzene from aniline, and further comprising a stripping column for stripping aniline from an aqueous stream. The first and second aqueous waste stream are provided to the stripping column, stripping aniline and nitrobenzene from the first and the aqueous waste stream, and the stripped aniline and nitrobenzene is provided to the aniline cleaning apparatus.

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Voorburg, Netherlands

Mark Geoffrey Bent