Cyclohexane Case Study

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Introduction Chevron Phillips Chemical Company is the major producer of Cyclohexane. This successful company hoses the three largest cyclohexane plants in the world. Many are puzzled by how the production of cyclohexane seems to have become stagnant. Perhaps this is due to the cost of benzene increasing or the demand increasing. Through thorough investigation, the answer to this question and many more can be answered. There are two methods of obtaining cyclohexane. These two methods are fractional distillation of naphtha and hydrogenation of benzene. Research suggest that the hydrogenation of benzene is the most economical way to create our chemical of choice. According to ICIS, cyclohexane is used in the production of adipic acid used to…show more content…
Liquid phase hydrogenation which is also known as IFP process .2 2. Gas phase hydrogenation of benzene.2 Liquid phase hydrogenation of benzene: IFP process: IFP process takes place entirely in liquid phase in temperature maintained about 2000C and pressure of 4x10^6 Pa absolute in the presence of Nickel catalyst. The purity of cyclohexane obtained is 99.8%. 3 Advantage of liquid phase: 1. Liquid phase is chosen for the hydrogenation of benzene because liquid phase hydrogenation uses low temperature which is less costly.2 2. 99 % pure cyclohexane is obtained which is almost free of byproducts such as methyl cyclo pentane. 3. Uses the liquid phase hydrogenation with Raney Nickel catalyst at 423 K and 15 atm pressure. 4. Nickel catalyst is circulated to improve heat removal such that benzene is completely hydrogenated in second fixed bed reactor.2 Vapor phase Hydrogenation of benzene: Vapor phase Hydrogenation also called Hydrar process uses three reactors with Ni- support with the operating temperature of 4000 C- 6000 C and 30 bars. 4 Disadvantage of gas or vapor phase: Gas or vapor phase yields low output per unit reactor volume. This is due to difficulty in cooling of the reactor zone. Gas phase uses bulky apparatus and costly cooling

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