A detailed study of effect of process parameters on Reduction of Metachloronitrobenzene (MCNB) using Hydrogen sulphide and Phase Transfer Catalyst

Abstract

Hydrogen sulphide (H2S) is a corrosive and toxic gas, which poses serious health and operational risks when present in produced fluids such as condensate, gas and water. Therefore efforts have been made to remove H2S from the sour gas. In today’s world, there are a number of processes in use for treating “sour” gases containing the acid components H2S and CO2. The goal of the present work is to study the reduction of Metachloronitrobenzene using Hydrogen sulphide and phase transfer catalyst and to study the effect of temperature, catalyst loading, concentration of reactants and temperature on the conversion and selectivity of the product. H2S is generally separated from the sour gas to produce elemental sulphur. This process is known as Claus process. Although elemental sulphur is produced, the cost of this process is high because it involves stripping of the H2S rich alkanolamine solution to give back the lean alkanolamine solution. However, if we use the absorbed H2S solution to produce other chemicals which are beneficial to the chemical industry, then we need not spend a lot on production of elemental sulphur. Chloroanilines are of great importance when it comes to the manufacturing of dyestuffs, drugs and various types of pesticides. Chlorhexidine, which is a very important antimicrobial and bacteriocide is produced from chloroanilines. It is important component of the chemicals required for producing various types of pesticides likemonolinuron,anilofos and chlorphthali.Chloroanilines are also used in the manufacture of benzodiazepine drugs. This procedure of utilising H2S is less costly than the production of elemental sulphur.