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The process involves the reaction of 1,2,4,5‑tetrachlorobenzene with base at a temperature of about 160°C. ... When hydrolyzed in acidic medium the peroxide intermediate produces phenol and acetone, which are both …
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Learn about the history, synthesis, and applications of phenols, a class of aromatic compounds with an -OH group. Find out how phenol is produced by the Dow's process and the cumene process, and how it is used as an …
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An article that reviews the history, state of the art and parameters of the cumene process, a chemical method for producing phenol and acetone from benzene and air. It also discusses the ways of improving the process and its environmental safety, …
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Well over 90% of the world phenol production is based on this technology. A drawback of this process is the substantial production of acetone coproduct. While well-established global markets for acetone exist, the demand for this coproduct has not always kept pace with the demand for phenol in certain regions.
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Process description. Phenol and acetone are produced in a three-step process from benzene and propylene called Hock process (Yadav and Asthana 2003). Cumene (isopropyl benzene) is an intermediate substance. In this process, two rather cheap substances (benzene and poly propylene) could be converted to two rather costly …
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Chen Huiwen, supervisor of Phenol/Acetone Process with Wanhua Chemical, said, "Starting the phenol-acetone plant smoothly couldn't have been possible without the strong support of KBR's technical team, who fully demonstrated professional knowledge in the process design and on-site inspection stages. They also helped us …
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The process according to claim 1, characterized in that the cleavage of dicumyl peroxide and dimethylphenylcarbinol is carried out in the tubular reactor in a reaction medium with a phenol: acetone ratio range of 1:0.77-0.80, whereby the phenol: acetone ratio is achieved either by removal of a part of the acetone or with the help of the ...
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The Phenol/Acetone process belongs to NACE code 2414 (Manufacture of other organic basic chemicals, with a production capacity of more than 100 tons per day). Phenol is mainly used as an intermediate in organic synthesis. In this, phenol essentially serves as a
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Phenol Unit This unit is based on UOP's CUMOX process, which is a commercially established Cumene per oxidation process for the economic and efficient production of phenol and acetone. Capacity. Phenol : …
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The design of the phenol production process is developed as part of the MSc-level course on Process Design at DTU. 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-produced.
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Acetone is a major by-product of the CHP oxidation process for the production of phenol. The overall economics of the process are highly dependent on …
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Acetone is a stoichiometric by-product of the cumene process for the production of phenol. By self-condensation of acetone (), it is possible to synthesize compounds valuable for industry: mesityl and isomesityl oxide, which result from condensation of two acetone molecules (C 6 products), and phorone and isophorones, …
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Recent process design innovations have been commercialized for the cumene hydroperoxide route that remains the process of choice for the production of phenol. All of this effort has been directed at improving yield, process economics/costs, and process safety for the preparation of phenol as a key intermediate for the growing …
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Since the 1950s, the cumene-to-phenol process is the predominant synthetic route for the production of phenol with acetone as the co-product. Cumene is …
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The use of the re-extractive distillation process is a viable alternative for phenol purification, since it allows the second product of the cumene method, acetone, to be involved in the technological cycle. ... Romanova, N.A. and Leontiev, V.S., Structure and energy optimization of the phenol and acetone separation process using reaction ...
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The phenol and acetone products are converted into plastics and other related materials, including bisphenol-A, a building block for polycarbonate plastics, and phenolic resins used to make durable laminated boards and industrial adhesives. The Evonik MSHP process hydrogenates alpha-methylstyrene (AMS) to cumene to be …
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INTRODUCTION Recently a new process for commercial phenol production has been announced, with cumene (isopropylbenzene) as starting material [1]. ... Concentration of Quantity Time of Yield of Yield of cwnene hydro- solution addition acetone phenol peroxide in the added in in in in Solution % u t g min. % % 28 7 8498 80 84 4 98 8 40 1 29-95 50 ...
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Phenol-acetone process - cumene oxidation-kinetics and industrial-plant simulation. Chem. Eng. Sci., 47 (9–11) (1992), pp. 2511-2516. View PDF View article View in Scopus Google Scholar. Kharlampidi et al., 2020. K.E. Kharlampidi, et al. The kinetic modeling of cumene oxidation taking into account oxygen mass transfer.
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Oxidation yields a hydroperoxide (cumene hydroperoxide), which undergoes acid-catalyzed rearrangement to phenol and acetone. Although this process seems more complicated than the Dow process, it is advantageous because it produces two valuable industrial products: phenol and acetone. General synthesis of phenols
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Apart from decomposing to phenol and acetone under acid catalysis, CHP could also thermally decompose to ACP and DMBA. DCP was generated in the reaction system, and further decomposed to phenol, acetone and AMS. AMS could also be produced via DMBA dehydration.
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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. Special …
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THE first plant to produce phenol and acetone from petroleum, through oxidation of cumene, went into operation last week when B. A.-Shawinigan Ltd. officially opened its plant at Montreal. The company, owned jointly by Shawinigan Chemicals and British American Oil Co., Ltd., is operating under license from Hercules Powder and Distillers Co., Ltd. The …
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The chemistry of phenol production is a two-step synthesis. First, cumene is reacted with oxygen in air to form an intermediate compound, cumene hydroperoxide (CHP). Second, …
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Side reactions in the phenol/acetone process. A kinetic study. Pier Luigi Beltrame; Paolo Carniti; Aldo Gamba; Oscar Cappellazzo; Loreno Lorenzoni; Giuseppe Messina; ... Phenol/acetone cogeneration via solid acid catalysis. Applied Catalysis A: General 1997, 161 (1-2), 199-211. DOI: 10.1016/S0926-860X(97)00070-7.
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production economics. The Sunoco/UOP Phenol process fills that need with commercially proven technology for the cumene route to phenol and acetone, backed up by continuing improvements and service. Cumene peroxidation is the preferred route to phenol, accounting for more than 90% of world production. The Sunoco/UOP Phenol process …
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It utilizes a process whereby cumene is air-oxidized to cumene hydroperoxide, which is catalytically split to phenol and acetone. When ultimate production rates are reached, …
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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.It is an economically competitive process, supported by the demand …
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In the Dow process, chlorobenzene is reacted with dilute sodium hydroxide at 300°C and 3000 psi pressure. The following figure illustrates the Dow process. Air oxidation of cumene. The air oxidation of cumene (isopropyl benzene) leads to the production of both phenol and acetone, as shown in the following figure.
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This article provides an overview of the chemical principles of achieving the highest possible selectivity in the modern process of simultaneous phenol and acetone …
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Experiment indicates that [Bmim]OH can effectively accelerate the oxidation reaction rate of cumene and improve the conversion of cumene. To investigate the catalytic effect of [Bmim]OH, the mechanism of molecular oxygen-activated [Bmim]OH-catalyzed oxidation reaction of cumene was proposed using the dispersion-corrected DFT-D3 …
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