آخرین محصولات
Economic and environmental analysis of the cumene production process
Cumene is mostly used as an intermediate for the production of acetone and phenol, used in the manufacture of several products such as bisfenol-A, polycarbonate and epoxy resins, nylon 6, among others. ... based their process design on Sharma et al.'s [21] work to apply energy integration in the cumene production process. The former authors ...
Phenol: Production, Reactions and Uses
Phenol is produced industrially by the Hock process, which involves the oxidation of cumene. It is the most widely used synthetic pathway, accounting for a production rate of over 6.7 million t/a of phenol and approximately 4.1 million t/a of the coproduct acetone .
Compact process for cumene manufacture: Synthesis
A compact single-unit process is developed for continuous cumene manufacture via the alkylation of benzene with propylene.The design combines reactive distillation (RD) and dividing-wall separation in a single column. In terms of the TAC, it is significantly cheaper (42%) than the conventional "reaction followed by separation process" and only slightly more …
The cumene process for phenol-acetone production
The history of designing and the evolution of the process for the joint production of phenol and acetone, which is now the basic industrial method for the manufacture of these products, the state of the art and parameters of its key steps in industrial facilities among world manufacturers of phenol are presented.
Process for producing phenol from cumene
In the cumene-phenol process, dilute acid is used to cleave CHP and produce phenol and acetone. The DMBA contaminant by-product present in the CHP fed to the cleavage reactor dehydrates in the dilutely acidic reaction mixture to form AMS, as just noted. However, the presence in the reaction mixture of the phenol product as well as the acetone ...
The Cumene Process for Phenol–Acetone Production
Abstract —The history of designing and the evolution of the process for the joint production of phenol and ace-tone, which is now the basic industrial method for the manufacture of these products, the state of the art and parameters of its key steps in industrial facilities among world manufacturers of phenol are presented.
Phenol Preparation from Haloarenes, Benzene, Cumene, …
This article provides a brief introduction to the preparation of phenols from haloarenes, benzene sulphonic acid, diazonium salts, and cumene. Phenol is an organic compound containing a benzene ring bonded to a hydroxyl group.
Benzene to Phenol via Cumene: Hock Process
2.6K Views. The synthesis of phenol from benzene via cumene and cumene hydroperoxide is called the Hock process. First, a Friedel–Crafts alkylation reaction of benzene with propene gives cumene. Then cumene forms cumene hydroperoxide via a radical chain reaction. In the chain initiation step, the benzylic hydrogen is abstracted to give a benzylic radical.
Phenol
The vast majority of phenol is made by the cumene process. The process has three stages: a) production of cumene. b) conversion of cumene to cumene hydroperoxide. c) decomposition of cumene hydroperoxide. Cumene is the name often given to (1-methylethyl)benzene (isopropylbenzene).
The Cumene Process for Phenol–Acetone Production
Abstract —The history of designing and the evolution of the process for the joint production of phenol and ace-tone, which is now the basic industrial method for the manufacture of these …
Optimization of distillation column in phenol production process …
In this study, phenol production process was simulated. Further, the performance of distillation column was optimized through maximizing the mole fraction of cumene in upstream flow. Response surface methodology was applied for design of experiment, modelling, and optimizing the cumene mole fraction in upstream flow of separation column. The analysis of …
Industrial catalytic processes—phenol production
The Sunoco/UOP Phenol process produces high-purity phenol and acetone by the cumene peroxidation route, using oxygen from air. This process features low-pressure …
Development of the cumene oxidation process: Rigorous …
In the literature, limited progress has been made in developing rigorous models for the cumene oxidation process. To the best of our knowledge, the cumene oxidation process has only been investigated by Kharlampidi et al. (2021). The authors designed the process based on the kinetic expressions derived from their experimental data.
Phenol Preparation from Haloarenes, Benzene, …
4. Preparation of Phenols from Cumene. Cumene is an organic compound obtained by Friedel-Crafts alkylation of benzene with propylene. Upon oxidation of cumene (isopropylbenzene) in the presence of air, cumene hydroperoxide is …
Phenol Preparation from Haloarenes, Benzene, …
This article provides a brief introduction to the preparation of phenols from haloarenes, benzene sulphonic acid, diazonium salts, and cumene. Phenol is an organic compound containing a benzene ring bonded to a hydroxyl group.
The cumene process for phenol-acetone production
The history of designing and the evolution of the process for the joint production of phenol and acetone, which is now the basic industrial method for …
Cumene process is the most important commercial method …
Cumene (isopropylbenzene) or (1-methylethyl) benzene is an organic compound obtained by Friedel-Crafts alkylation of benzene with propylene. Cumene is oxidised in the presence of air to cumene hydroperoxide. Now, cumene hydroperoxide is treated with dilute acid to prepare phenol and acetone as by-products.
How is Phenol Prepared from Cumene
Preparation of phenol from cumene: a. When an alkaline solution of cumene (isopropyl benzene or 2-Phenylpropane) in sodium carbonate is oxidised by passing air or oxygen in the presence …
How is Phenol Prepared from Cumene
Preparation of phenol from cumene: a. When an alkaline solution of cumene (isopropyl benzene or 2-Phenylpropane) in sodium carbonate is oxidised by passing air or oxygen in the presence of cobalt naphthenate as a catalyst at 423 K, cumene hydroperoxide is obtained.
Phenol
The phenol produced by the Hock process approaches 99.99 wt % with total impurities of only 60 ppm. The process starts with cumene being oxidized to form an intermediate compound called …
how phenol is prepared from cumene
The cumene process, also known as the Hock process, is an industrially significant method for synthesizing phenol and acetone from cumene (isopropylbenzene). The process is widely used due to its efficiency and the economic value of its by-products.
Solid Acid Catalysts for the Hock Cleavage of …
The oxidation of cumene and following cleavage of cumene hydroperoxide (CHP) with sulfuric acid (Hock rearrangement) is still, by far, the dominant synthetic route to produce phenol. In 2020, the global phenol market reached a value of 23.3 billion US$ with a projected compound annual growth rate of 3.4% for 2020–2025. From ecological and economical viewpoints, the key step …
Phenol
The vast majority of phenol is made by the cumene process. The process has three stages: a) production of cumene. b) conversion of cumene to cumene hydroperoxide. c) decomposition of cumene hydroperoxide (a) Production of …
17.9 Phenols and Their Uses
Cumene Process. Developed in the 1940s and currently responsible for most industrial phenol production this process involves isopropylbenzene—commonly known as cumene. Treatment of cumene with oxygen in air generates 2-hydroperoxypropan-2-ylbenzene (cumene hydroperoxide) through a radical pathway.
(PDF) Production of phenol from cumene
As the base case design, auto-catalyzed oxidation of cumene to cumene hydroperoxide subsequently cleaved over a solid catalyst to phenol and acetone is selected. In this process, acetone is co ...
Note: 51711 Production of Phenol and Acetone
The phenol produced by the Hock process approaches 99.99 wt % with total impurities of only 60 ppm. The process starts with cumene being oxidized to form an intermediate compound called cumene hydroperoxide (CHP) (Figure 1). The cumene hydroperoxide then goes through a cleavage reaction to form phenol and acetone. Cumene (isopropylbenzene) is ...
Industrial catalytic processes—phenol production
The Sunoco/UOP Phenol process produces high-purity phenol and acetone by the cumene peroxidation route, using oxygen from air. This process features low-pressure oxidation for improved yield and safety, advanced CHP cleavage for high product selectivity, an innovative direct product neutralization process that minimizes product waste, and an ...
(PDF) Production of phenol from cumene
Alpha methyl styrene is hydrogenated back to cumene over a highly selective catalyst. The by-products and presence of azeotropes make the downstream separation of the products complex. Separation...
how phenol is prepared from cumene
The cumene process, also known as the Hock process, is an industrially significant method for synthesizing phenol and acetone from cumene (isopropylbenzene). The process is …
Phenol: Production, Reactions and Uses
Phenol is produced industrially by the Hock process, which involves the oxidation of cumene. It is the most widely used synthetic pathway, accounting for a production rate of …
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