Effect of KOH Pretreatment on Lignocellulosic Waste for the Reduction of Nitrobenzene to Aniline without Metal

Abstract

A green reduction of nitrobenzene to aniline was carried out using lignocellulosic biomass as a hydrogen source in a subcritical polar protic solvent, such as water and alcohol. The method is simple to implement, inexpensive, and easily applicable on a larger scale. The present method does not demand elaborated experimental conditions nor any metal catalyst. Optimal conditions provided aniline with a 90% yield by reduction of nitrobenzene in the presence of sawdust impregnated by KOH in subcritical methanol at 240 °C for 6 h.

A Core-Shell Amino-Functionalized Magnetic Molecularly Imprinted Polymer Based on Glycidyl Methacrylate for Dispersive Solid-Phase Microextraction of Aniline

“…In order to determine whether extraction and desorption are more efficient using ultrasound or vortex, this variable was also investigated. The range of variables was taken in the range of the above literature: sorbent mass (10-50 mg), ion strength (0-5 % w/v), desorption volume (100-700 µL), pH (3)(4)(5)(6)(7)(8)(9)(10)(11), temperature (10-40 • C), and vortex time (1-5 min).…”

“…Aniline (C 6 H 5 NH 2 ), an organic compound in which the primary amino group is attached to an aromatic ring, represents one of the most important organic intermediates in textile industries, as well as in the production of drugs, polyurethanes, pesticides, rubber, plastics, varnishes, and pigments [3]. The primary exposure to aniline is through azo dyes used in the textile industry for dyeing textiles and leather [4].…”