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