How will you prepare acetone from cumene?
The common production process takes place in two phases. In the first phase, the cumene is oxidized to cumene hydroperoxide (CHP), with conversions which range from 20- 30 percent by weight, and in the second phase the CHP is acid cleaved into phenol and acetone with an acid, generally sulfuric acid.
How is cumene manufactured?
Cumene is produced from the distillation of coal tar and petroleum fractions or by the alkylation of benzene with propene using an acidic catalyst. It is used almost exclusively to produce phenol and acetone. Cumene occurs naturally in crude oil, and is found in the environment in plants and foodstuff.
How is cumene converted into phenol?
Cumene (isopropylbenzene) is oxidised in the presence of air to cumene hydroperoxide. It is converted to phenol and acetone by treating it with dilute acid.
What happened when cumene exposed to air?
Acute (short-term) inhalation exposure to cumene may cause headaches, dizziness, drowsiness, slight incoordination, and unconsciousness in humans.
Which of the following is by product of cumene process?
The product cumene hydroperoxide is heated with dilute sulphuric acid. It decomposes to phenol and by product acetone.
What is cumene process Class 12?
Cumene (isopropylbenzene) is oxidized in the presence of air to cumene hydroperoxide. It is converted to phenol and acetone by treating with dilute acid. Acetone, a by-product of this reaction is also obtained in large quantities by this method. By this method, the phenol of high purity is obtained.
How is cumene manufactured Mcq?
1. How is cumene manufactured? Explanation: Catalytic hydrogenation of isopropanol, Oxidation of butane and Oxidation of propylene are for the manufacture of acetone. Cumene is manufactured from polypropylene propane mixed with benzene.
How phenol is obtained from cumene give distinguishing test of phenol?
Preparation of Phenols from Cumene Upon oxidation of cumene (isopropylbenzene) in the presence of air, cumene hydroperoxide is obtained. Upon further treatment of cumene hydroperoxide with dilute acid, phenols are obtained.
What is cumene hydroperoxide used for?
Cumene Hydroperoxide is a colorless to pale yellow liquid with a strong odor. It is used to make Acetone and Phenol, as a curing agent, and a polymerization catalyst.
What are the products obtained on reaction of cumene with oxygen followed by hydrolysis?
Detailed Solution. Cumene is reacted in the presence of oxygen it will produce the cumene peroxide and that cumene peroxide is reacted with ion, then it will produce the phenol with Acetone. Phenol is an aromatic organic compound with the molecular formula C6H5OH.
Which byproduct is obtained in manufacture of phenol from cumene?
acetone
Preparation of phenol from cumene. By product is acetone i.e. propanone.
How is cumene released to the environment?
Sources and Potential Exposure Cumene is a constituent of crude oil and finished fuels. It is released to the environment as a result of its production and processing from petroleum refining, the evaporation and combustion of petroleum products, and by the use of a variety of products containing cumene.
How many manufacturing workers are exposed to cumene?
In 2001, approximately 110–200 cumene-manufacturing workers had potential exposure in the EU (European Commission, 2001); manufacturing workers exposed to cumene include shift operators, foremen, maintenance fitters, quality control personnel and others, such as delivery drivers.
What is cumene used for in organic chemistry?
Use Cumene is used primarily (95%) as an intermediate in the production of phenol and acetone.
What is the exposure level of cumene?
In general, exposure levels for most other uses of cumene (such as printing and rubber manufacture) were less than 1.5 ppm, although somewhat higher levels were found for short-term exposure among workers involved in car repairs (see Table 1.5).