It was invented by R. Ūdris and P. Sergeyev in 1942 (USSR)., and independently by Heinrich Hock in 1944. NCERT Solutions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers is an essential study material that is required for all students studying Class 12 chemistry. The product is cumene hydroperoxide, which is to say PhCMe2OOH. . (Isoprophyl benzene)Cumene. This article is a continuation of the revision notes on CBSE Class 12 Chemistry, Chapter- Alcohols, Phenols and Ethers, Part-I. Class 10 Class 12. The cumene process (cumene–phenol process, Hock process) is an industrial process for synthesizing phenol and acetone from benzene and propylene.The term stems from cumene (isopropyl benzene), the intermediate material during the process. Draw the resonance structures of the corresponding phenoxide ions. Alcohols, Phenols and Ethers. Upon oxidation of cumene (isopropylbenzene) in presence of air, we obtain cumene hydroperoxide. Primary (1°), secondary (2°) and tertiary (3°) alcohols are those in which as the OH group is attached … Upon further treatment of cumene hydroperoxide with dilute acid, we get the phenols. The cumene required in the above reaction is prepared from benzene and propene by Friedel-crafts reaction. To prepare phenol, cumene is first oxidised in the presence of air to cumene hydroperoxide. . (b) Write the chemical reaction for the preparation of phenol from chloro benzene Give equations of the following reactions: ... Cumene is oxidised into cumene hydro peroxide by air at high pressure which on decomposition by aqueous acid gives phenol and acetone. (a) Give the equation of reaction for the preparation of phenol from cumene. This is an old industrial process. Now, cumene hydroperoxide is treated with dilute acid to prepare phenol and acetone as by-products. The solutions for Class 12 Chemistry Chapter 11 pdf help the students with some exercises, worksheets and assignments in practising important structures and formulas from aldehydes ketones and carboxylic acids topic. O2. ... Give the equations of the reaction for the preparation of phenol from cumene. Cumene (isopropylbenzene) is oxidized with air in the presence of a cobalt catalyst. 4) Preparation of Phenols from Cumene. Cumene hydroperoxide H + 323−363K. Cumene hydroperoxide. Zigya App. Cumene is an organic compound that we can obtain by the Friedel-Crafts alkylation of benzene with propylene. RD Sharma Class 12 Solutions; RD Sharma Class 11 Solutions Free PDF Download; ... Ortho and para nitrophenols are more acidic than phenol.