| abstract |
A CONVENTIONAL PROCESS FOR PREPARING ALKYLBENZENES IS CARRIED OUT, WHEREIN LINEAR C9-C15 PARAFFINS ARE CHLORINATED AND CATALYTICALLY ALKYLATED WITH EXCESS BENZENE, FRACTIONATED, AND UNREACTED PARAFFINS AND BENZENE ARE RECYCLED. ACCORDING TO THE INVENTION, BY-PRODUCTS, ESPECIALLY CHLORINATED PRODUCTS, ARE REMOVED FROM THE UNREACTED PARAFFINS BY CONTRACTING THE PARAFFINS, PRIOR TO RECYCLE, WITH CONCENTRATED SULPHURIC ACID, OLEUM OR SULPHURIC ANHYDRIDE. |