Benzene and propylene, the two reactants used to create cumene, are produced primarily as a byproduct of crude oil refining. Energy efficient catalytic reaction and production of cumene. The objectives of the present project are following. Phenol can be form from cumene peroxidation process. To design a zeolite catalyst based cumene production process and study the sensitivity analysis. Zeolitebased cumene production plant 1283 downloaded by university of saskatchewan library at 11. Cumene production process flow sheet propylene supplied needs to be separated from butane and butene in a debutanizer column to obtain a pure propylene.
Besides cumene, variable amounts of lpg can be obtained as subproducts. Air may be eventually washed to mainly neutralize so2 traces coming out of the sulfuric acid plant stack. Further the method is capable of operating efficiently at high lhsvs. Abstract process economics program report 267 propylene. Alkylation of benzene by propylene to cumene 6 tekim undip. Cumene production posted in refining, hydrocarbons, oil, and gas. Pdf material balances design problem cumene production. The major reactions taking place are alkylation and transalkylation.
The first reaction is the production of cumene hydroperoxide by two raw materials i. Design of a plant to produce 10,000 tons per day of cumene from the reaction of propylene and benzene in the presence of an acid catalyst an undergraduate design report presented by group seven to the department of chemical engineering, federal university of. Although styrene was discovered way back in 1839, its commercial production and applications were developed in. Be sure to read carefully through all the examples in this chapter. In the design of a chemical process the need is the public need for the product, the commercial.
The reaction mechanism and kinetics may vary depending on the catalyst. Mass balance to meet the product speci cation of 700 metric tons of ethylene per day with 100% ethane recycle, a mass balance was performed on the ethylene plant. The manufacturing process is based on the addition of propylene to benzene. May be moderately toxic by inhalation, ingestion and skin absorption. Design of cumene producing plant free download pdf kupdf. Cumene separations and reactors plus topics in c word cumene separations and reactors plus. Figure 6 overall material balance for distillation column 2 cumene. Cumene is previously washed with a caustic solution to remove impurities that can affect the oxidation. The first plant to produce phenol and acetone from petroleum, through oxidation of cumene, went into operation last week when b. Phenol, acetone, cumene 09104 report abstract 1 perp 00101. Economic optimization of the cumene production process. Pdf economic design and optimization of zeolitebased cumene. At present stage screening study it is not possible to obtain the attention of the licensors.
Jul 14, 2015 cumene production slide show group 7 1. Design of a plant to produce 10,000 tons per day of cumene from the reaction of propylene and benzene in the presence of an acid catalyst an undergraduate design report presented by group seven to the department of chemical engineering, federal university of technology, minna march, 2014. Oxidation concentration the raw material for this section is cumene which is oxidized using compressed air. Invision employees share their remote work secrets. A 94% yield was estimated by sri for cumene synthesis. This process converts two relatively cheap starting.
Energy balances and numerical methods design project. The cumene production technology was originally developed during world war ii to meet the demand for aviation gasoline, with which it was blended to improve octane rating 8,9. Styrene who is also known as ethylbenzene,vinybenzene and phenylethene is an organic compound with the chemical formula c 6 h 5 chch 2. Cumene fluids, heat, thermodynamics plus topics in a and b word cumene fluids, heat, thermodynamics plus topics in a and b pdf. To optimize the contents of the flow sheet for minimization of loss of material along with a greater production of cumene and low requirement of energy. My initial thoughts of approaching this problem was that i look in the literature for the kinetics of the reaction from which i can assume the conversion and the ratio of the. Calculate material balances for the process in the sketch.
Provides economic considerations to include global market analysis all units distillation columns, reactorsect are designed. Dear experts, im working to a refinery optimization model, investigating the economics for the introduction of a new cumene unit from benzene and propylene. Cumene production plant free download as powerpoint presentation. Onpurpose production of propylene has become more attractive as less costly supplies from traditional sources become inadequate to meet projected demand. We have also performed material balance and energy balance calculation at selected reactor, which is oxidation vessel. Since the second has a higher activation energy than the first, low reactor temperatures improve selectivity of cumene. Given the output of cumene production, how do i go on about performing material balances on every single unit in a process. Differential balances are applied to continuous processes. Applying this conver sion factor to the itc production data for cumene production yielded. Therefore, the cumene and phenol markets are strongly tied. Economic design and optimization of zeolitebased cumene. Essentially all cumene produced worldwide is used as a feedstock in phenol plants, which convert it to phenol and acetone by cumene peroxidation.
Take your hr comms to the next level with prezi video. In the synthesis of isopropylbenzene the reaction mass contains 45. Cumene in the global petrochemical industry is used primarily as a reactant for production of phenol. Cumene based routes to phenol are responsible for virtually all global production of phenol. Process flow diagram of liquid phase cumene production for. To optimize the contents of the flow sheet for minimization of loss of material along. The intermediate product which is cumene hydroperoxide is used as a reactant in the second reactor, the reactor intended to be used is the continuous. Application of cumene technology mathematical model core. The production of cumene using zeolite catalyst aspen. 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.
Cumene is produced commercially through the alkylation of benzene with propylene over an acid catalyst. Material balances design problem cumene production. Production of phenol and acetone from oxidation of cumene. The benzene feed, which may be considered pure, is liquid at 1 atm and 25c. Special attention is given to the consideration of ways of improving the. Page 1 of 2 design of a cumene production facility posted in student. Cumene is produced commercially through the alkylation of benzene with propylene over an acid catalyst such as bf3, alcl3,hf,h3po4 etc. Environmental education resources to commemorate earth days 50th anniversary. Production of cumene is one of the most largescale productions in the world, which is among. Rate expressions to solve the reactor material balance, we require an expression for the production rates, rj rj x i ijri therefore we require ri as a function of cj this is the subject of chemical kinetics, chapter 5 here we use common reactionrate expressions. The reactor is adiabatic, the heat balance equation is written as follows 15. Cumene production refining, hydrocarbons, oil, and gas. The reaction takes place in the oxidizing tower at 110115 oc and ph range of 6. Cumene production plant distillation catalysis free.
Cumene appears as a clear colorless liquid with an aromatic odor. The term stems from cumene isopropyl benzene, the intermediate material during the process. Materials balance for benzene, level 1 preliminary. The chemistry of the cumene process features the desired reaction of benzene with propylene to form cumene and the undesirable reaction of cumene with propylene to form pdiisopropylbenzene. Conceptual design of chemical plants by multiobjective. Cumene is an alkylbenzene that is benzene carrying an isopropyl group. In 2015 a further 450 kty cumene capacity plant has come on stream in china, currently under revamping to 600 kty. Preliminary design of cumene producing plant, flow sheet, material balances, energy balances. The cumene process cumenephenol process, hock process is an industrial process for synthesizing phenol and acetone from benzene and propylene. My initial thoughts of approaching this problem was that i look in the literature for the kinetics of the reaction from which i can assume the conversion and the ratio of the reactants in the feed. A method is disclosed for the synthesis of phenol and acetone by acidcatalyzed decomposition over a catalyst comprising an acidic smectite clay, particularly an acidic montmorillonite silicaalumina clay. In order to be trained on using a systematic procedure to solve material balance problems, you are advised to. A material balance taken over the complete process will determine quantities of raw materials required and products produced. Today, the cumene is used almost exclusively for manufacturing phenol and acetone.
The company, owned jointly by shawinigan chemicals and british american oil co. Cumene material 2520balance free download as pdf file. Thus, material balances are often compared to the balancing of current accounts. Cumene may be used to increase the octane in gasoline, but its primary use is as a feedstock for manufacturing phenol and acetone. The propylene may contain up to 40% propane, but without ethylene and butylene. Side reactions which take place are isomerisation and disproportionation. Home image popup uop qmax process for cumene production. These usually apply to batch processes the terms in a batch mater. The main use of cumene is as a feedstock for phenol production. Special attention is given to the consideration of ways. They are used in industry to calculate mass flow rates of different streams entering or leaving chemical or physical processes. Production of cumene process description figure 1 is a preliminary process flow diagram pfd for the cumene production process. Procedure for material balance calculations in material balance problems, you will usually be given a description of a process, the values of several process variables, and a list of quantities to be determined. This value is equal to the ratio molecular weight benzenemolecular weight cumene f theoretical yield.
Material balances design problem cumene production background. Mar 21, 2019 page 1 of 2 design of a cumene production facility posted in student. A powerpoint presentation outlining economic and design factors for an isopropylbenzene plant. Cumene is currently among the worlds five biggest largescale productions, along with ethylene, propylene, benzene and ethylbenzene 10. The method allows for quantitative conversions with yields of up to 98% mole or better. From 1993 to 1998, world cumene demand grew at a rate of 4. As a result, the rate of ethylene production, feed requirements, and ethane recycle were found, as shown below. Feb 19, 2019 cumene production posted in refining, hydrocarbons, oil, and gas. Cumene material balances, energy balances, numerical methods, and optimization material balances pdf. Us4870217a method for production of phenolacetone from. They are used in industry to calculate mass flow rates of different streams entering or leaving chemical or physical.
Cumene material 2520balance benzene nuclear reactor scribd. To design a zeolite catalyst based cumene production process. Remote work advice from the largest allremote company. The propylene feed contains 5 wt% propane as an impurity, it is a saturated liquid at 25c. Your plant currently purchases 100,000 tons of cumene per year to make phenol. The following reaction mechanism are proposed for the alkylation of benzene for production of cumene.
Us5055627a us07405, us40589a us5055627a us 5055627 a us5055627 a us 5055627a us 40589 a us40589 a us 40589a us 5055627 a us5055627 a us 5055627a authority us united states prior art keywords benzene cumene propylene catalyst distillation prior art date 19850107 legal status the legal status is an assumption and is not. Design and control of the cumene process industrial. Alkylation of benzene by propylene to cumene request pdf. Reaction mechanism and kinetics for cumene production. The key concepts are best learned by problem solving. The terms in a differential material balance are expressed as rates. Alkylation of benzene by propylene to cumene 173 6 6. Abstract process economics program report 267 propylene production october 2008 propylene has traditionally been recovered as byproducts of petroleum and petrochemical operations.
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