Patent ID: 8697913
Filing Date: 2014-04-15
Classification: C02F,C07C

Abstract:
1. A chemical installation comprising 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; said chemical installation comprising an aniline cleaning apparatus for removing nitrobenzene from aniline, said chemical installation further comprising a stripping column for stripping aniline from an aqueous stream, characterized in that said first and second aqueous waste stream are provided to said stripping column, said stripping column stripping aniline and nitrobenzene from said first and second aqueous waste stream, the stripped aniline and nitrobenzene being provided to said aniline cleaning apparatus; and wherein said stripping column has n theoretical trays A1 to An, A1 being the top tray, An being the bottom tray, said second waste stream being introduced in the stripping column at theoretical tray Ax, x being greater or equal to 1, said first waste stream being introduced in the stripping column at a theoretical tray A[y], wherein [y] is the integer of y and y fulfills the equation 0.5*(n+1)+0.5*x<y<0.85*(n+1)+0.15*x.