Sep 01, 2021 (The Expresswire) -- "Final Report will add the analysis of the impact of COVID-19 on this industry" "Cumene Hydroperoxide Market" Report 2021...

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At higher temperatures, the hydroperoxide is unstable and could decompose violently. The oxidizers are generally built some distance from the rest of the plant. (c) Decomposition of cumene hydroperoxide. Finally, the hydroperoxide is mixed with sulfuric acid at 313-373 K to give, after neutralisation, phenol …

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Use of a composition comprising cumene hydroperoxide, cumene, acidic catalyst for decomposition of cumene hydroperoxide, dicumyl peroxide, dimethylbenzyl alcohol, phenol, and acetone wherein the acetone is in a molar ratio to phenol of from 1.1:1 to 1.5:1 in the selective decomposition of dicumyl peroxide in a separate reactor to alpha methyl styrene, phenol and acetone.

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The invention claimed is: 1. A method for the production of phenol and acetone from a cumene hydroperoxide mixture comprising: decomposing the cumene hydroperoxide mixture in the presence of a catalyst mixture to form a mixture comprising phenol and acetone, wherein the method further comprises: a) forming the catalyst mixture in a catalyst formation reactor by combining sulfuric acid …

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Preparation of phenol from cumene →. To prepare phenol, cumene is first oxidised in the presence of air to cumene hydroperoxide. (Isoprophyl benzene)Cumene. . O 2. . Cumene hydroperoxide. Now, cumene hydroperoxide is treated with dilute acid to prepare phenol and acetone as by-products. Cumene hydroperoxide H +323−363K.

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However one of the key manufacturing process is air oxidation of cumene to cumene hydroperoxide (CHP) followed by acid catalyzed cleavage of this CHP to phenol and aceton (Zakoshansky, 2009 ...

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In the cleavage area, the concentrated cumene hydroperoxide (Stream C13) is cleaved to acetone and phenol in the presence of sulfuric acid (Stream A4) or other strong mineral acid. Con- centrated cumene hydroperoxide is fed to a small, constant flow/ stirred tank reactor along with sulfuric acid diluted to 5% to 10% by weight with acetone.

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1. An improved method for production of phenol and acetone from cumene hydroperoxide by decomposition of cumene hydroperoxide in the presence of a mineral acid catalyst, wherein the improvement comprises neutralization of said mineral acid catalyst after substantial completion of said decomposition by addition of a substituted amine selected from the group …

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Abstract This article studies the thermokinetics and safety parameters of cumene hydroperoxide (CHP) manufactured in the first oxidation tower. Vent sizing package 2 (VSP2), an adiabatic calorimeter, was employed to determine reaction kinetics, the exothermic onset temperature (T0), reaction order (n), ignition runaway temperature (TC, I), etc. The n value and activation energy …

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Cumene hydroperoxide is obtained by oxidizing cumene with air, usually in a cascade of stirred-tank reactors or bubble columns at temperatures in the range of 100-140 °C and a pressure of 6-7 bar and usually with small amounts of a buffer to prevent acids from building up. Since cumene hydroperoxide, as a tertiary alkyl hydroperoxide, is much more stable than ethylbenzene hydroperoxide, the ...

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S. Nikfar, A.F. Behboudi, in Encyclopedia of Toxicology (Third Edition), 2014 Uses. Around 98% of cumene is used in the production of phenol and its coproduct, acetone, using cumene hydroperoxide as chemical intermediate. However, the demand for cumene is largely dependent on the performance of phenol's derivatives, which have resulted in healthy growth rates in demand for cumene.

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The cleavage reaction in the manufacture of phenol and acetone from cumene is well known. In the manufacturing scheme, a feed stream of cumene is oxidized to cumene hydroperoxide. It is then passed into a cleavage unit wherein an acid catalyst is added and the CHP is then decomposed to phenol, acetone and other by-products.

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Cumene is an alkylbenzene that is benzene carrying an isopropyl group. Cumene is used in a variety of petroleum products. Acute (short-term) inhalation exposure to cumene may cause headaches, dizziness, drowsiness, slight incoordination, and unconsciousness in humans. Cumene has a potent central nervous system (CNS) depressant action ...

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to produce phenol as a raw material at a cheaper cost than the current market price of $0.64/lb. The production rate of concern is 190,000 metric tons per year. Basic Flow Diagram and Process Background The phenol production process is based on the oxidation and cleavage of cumene. Major Hazards Oxidation of Cumene (Hock process)[1]:

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Abstract Cumene hydroperoxide (CHP) being catalyzed by acid is one of the crucial processes for producing phenol and acetone globally. However, it is thermally unstable to the runaway reaction readily. In this study, various concentrations of phenol and acetone were added into CHP for determination of thermal hazards. Differential scanning calorimetry (DSC) tests were used to obtain …

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Cumene hydroperoxide (CHP) is widely used in chemical processes, mainly as an initiator for the polymerization of acrylonitrile–butadiene–styrene. It is a typical organic peroxide and an explosive substance. It is susceptible to thermal decomposition and is readily affected by contamination; moreover, it has high thermal sensitivity. The reactor tank, transit storage vessel, and pipeline ...

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the cumene is converted to cumene peroxide in a non-catalytic auto-oxidation reaction. The last step is acidic cleavage of cumene hydro-peroxide into phenol and acetone that is catalyzed by sulfuric acid at 333-373 K [1]. The advantage of the cumene process is that it takes two inexpensive starting materials, benzene and propylene,

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3 Case study. The first step in phenol production is oxidation of cumene to cumene-hydroperoxide (CHP) with 25-30% conversion. Phenol comes from cleavage of CHP, but in the previous step the diluted CHP has to be concentrated. The concentration of CHP (to ~ 60w%) is done in vacuum distillation column, where the bottom product is the ...

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The first report of phenol and acetone being produced by acid-catalyzed decomposition of cumene hydroperoxide (CHP) was in 1944 [ 4 ]. Hock and Lang use boiling 10% aqueous sulfuric acid to affect the conversion to phenol and acetone. At present, about 94.5% of phenol in the chemical market is manufactured by CHP decomposition [ 5 ].

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Cumene Hydroperoxide is used as a reagent for manufacturing organic peroxides, as a polymerization inhibitor and as a strong free radical source because Cumene Hydroperoxide contains more than 8.5% active oxygen. Cumene Hydroperoxide is a strong oxidizing agent which makes it a valuable specialty intermediate in epoxy resin and plastic industries.

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Cumene hydroperoxide (CHP), a type of organic peroxide, is widely used in the chemical industry for diverse applications. However, it decomposes and undergoes highly exothermic runaway reactions under high temperature because of its unstable ... Figure 27 Pressure rate …

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The second step, propagation, is the rate controlling reaction for cumene oxidation, as it involves both the formation of CHP and the cumyl radical [8]. Figure 6 – Cumene hydroperoxide radical formation. Figure 7 – CHP production. Termination reactions cause disappearance of the radicals and thus stop the chain reaction [8].

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Over 90% of the cumene hydroperoxide (CHP) produced in the world is applied in the production of phenol and acetone. The additional applications were used as a catalyst, a curing agent, and as an initiator for polymerization. Many previous studies from open literature have verified and employed various aspects of the thermal decomposition and thermokinetics of CHP reactions. An …

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Exploring the effect of phenol and acetone on reactivity further, a test was performed in which much of the cumene was replaced with phenol, yielding a mixture containing 50 wt% phenol. In this case, the rate of the low temperature exotherm, particularly below 30 °C, was dramatically reduced ( …

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Plenty of thermal explosions and runaway reactions of cumene hydroperoxide (CHP) were described from 1981 to 2010 in Taiwan. Therefore, a thermal explosion accident of CHP in oxidation tower in 2010 in Taiwan was investigated because of piping breakage. In general, high concentration of CHP for thermal analysis using the calorimeter is dangerous. Therefore, a simulation method and a …

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This catalyst has been found to exhibit excellent activity for decomposition of cumene hydroperoxide exclusively into phenol and acetone. Various kinetic parameters were studied over 20% Cs 2.5 H 0.5 PW 12 O 40 /K-10. The reaction follows the first order kinetics.

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A process for the decomposition of cumene hydroperoxide to phenol, acetone, and alpha-methylstyrene is presented. In this process, cumene hydroperoxide and sulfuric acid are reacted in a reflux cooled reactor the products of which are transported under inhibited conditions to a plug flow reactor, and are reacted to produce phenol, acetone, and alpha-methylstyrene.

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Therefore, the o verall rate law fo r CHP in the rmal. ... As one of the typical OPs and an intermediate in the process of producing phenol, cumene hydroperoxide (CHP) is likely to mix with its ...

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CUMENE HYDROPEROXIDE is a strong oxidizing agent. May react explosively upon contact with reducing reagents. Violent reaction occurs upon contact with copper, copper alloys, lead alloys, and mineral acids. Contact with charcoal powder gives a strong exothermic reaction. Decomposes explosively with sodium iodide [Chem. Eng. News, 1990, 68 (6), 2].

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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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