Hydrogen sulfide is a colorless gas with an unpleasant rotten egg odor. H2S is highly flammable, harmful and vitriolic in nature. Many oil and natural gas processing industries produce H2S as a byproduct gas stream. Most of the H2S in the air comes from the natural sulfur cycle. Exposure to H2S can lead to various health problems such as burning/watering eyes, coughing, and shortness of breath. Moderate concentration may cause breathing problems. It is therefore advisable to use this gas in other industrial operations. Elemental sulfur is conventionally produced using H2S by Claus Process, which is then used in the production of H2SO4 or in the rubber industries. But the high amount of energy and the necessary process control over the oxygen and H2S ratio make the Claus process uneconomical. The H2S-laden gas can be well utilized by absorbing it into an aqueous alkanolamine and then using this reagent to produce organosulfur compounds like thioether, mercaptans, disulfides, etc., which have greater ease of absorption. use and better market value. The overall objective of this project is to study the synthesis of aromatic disulfide using an aqueous solution rich in H2S. alkanolamine and benzyl chloride in the presence of a phase transfer catalyst. Hydrogen sulfide is a colorless gas with an unpleasant rotten egg odor. H2S is highly flammable, harmful and vitriolic in nature. Its presence can be felt by smell at very low levels, as low as 0.5 ppb in the air. Many oil and natural gas processing industries produce H2S as a byproduct of the gas stream. Most of the H2S in the air comes from the natural sulfur cycle. It is produced when bacteria break down plant and animal matter, often in stagnant waters with low oxygen content, such as peat bogs and swamps. Volcanic eruptions, sulfur springs, salt marshes... middle of paper ...... erosion inhibitors, moss inhibitors, buffers, etc. They offer advantages such as selective elimination of H2S, partial or total elimination of CO2, very acidic gases. loading, SOC removal, etc. (Manning and Thompson, 1991; Pearce and Wolcott, 1986; Thomas, 1988: Meissner and Wagner. 1983; Meissner, 1983; Niswander et al., 1992). MDEA – Methyldiethanol Amine is clear, colorless and pale. yellow with ammonia odor, miscible with water, alcohol, benzene with chemical composition CH3N (C2H4OH)2. It is a sweetening agent.Advantages of using MDEA over MEA or DEA:1. The fact that MDEA is a tertiary amine makes it less basic. Additionally, there is no hydrogen bonded to nitrogen. Thus, if CO2 is present in the gas, it can only react after the CO2 dissolves to form bicarbonate, which then undergoes an acid-base reaction with the amines. But the MEA and the DEA react with all the CO2 present in the gas flow..