Process Creation

Process Creation - Homework Assignment#1 1 For the...

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Copyright 2003 John Baldwin 1 ChEn 425 – Process Creation – Slide 1 Homework Assignment #1 1. For the manufacture of vinyl acetate, assemble a preliminary database. This should include thermo physical property data, toxicity and flammability data, and the current price of the chemicals. 2. Determine which of the following processes to generate steam at 60 atm is preferred giving the reason why: a. Vaporize water at 1 atm and compress the steam to 60 atm. b. Pump water to 60 atm followed by vaporization. 3. For an equimolar solution of n-pentane and n-hexane using both graphical and electronic methods, compute: a. The dew-point at 120 F. b. The bubble-point temperature at 1 atm. c. The vapor fraction, at 120 F and 0.9 atm, and the mole fractions of the vapor and liquid phase. ChEn 425 – Process Creation – Slide 2 Process Creation Objectives Understand how to go about assembling design data and creating a preliminary database Be able to implement the steps in creating flowsheets involving reactions, separations, heating/cooling and pressure-change operations Know how to select the principal pieces of equipment and to create a detailed process flowsheet Understand the role of a pilot plant Have an initial concept of the role of a process simulator
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Copyright 2003 John Baldwin 2 ChEn 425 – Process Creation – Slide 3 “An opportunity has arisen to satisfy a new demand for vinyl chl oride monomer, on the order of 800 million pounds per year, in a petrochemical complex on the Gulf Coast, given that an existing plant owned by the company produces 1 billion pounds per year of this commodity chemical. Because vinyl chloride monomer is an extremely toxic substance, it is recommended that all new facilities be designed carefully to satisfy governmental health and safety regulations.” Vinyl chloride monomer: H Cl C C H H Polyvinyl chloride: CHCl CHCl CHCl CH 2 CH 2 CH 2 Vinyl Chloride Problem Statement (Again) ChEn 425 – Process Creation – Slide 4 Design Steps (Again)
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Copyright 2003 John Baldwin 3 ChEn 425 – Process Creation – Slide 5 Status of Design Process Current Focus ChEn 425 – Process Creation – Slide 6 Assessing the Primitive Statement (Alternatives) 1. Buy from competitor. 2. Buy chlorine and react with in-house ethylene. 3. Use surplus HCl and react with acetylene (or ethylene) and oxygen to produce 1,2-dichloroethane, which is cracked to form vinyl chloride. 4. Design electrolysis plant to produce chlorine and then proceed as in #2.
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Copyright 2003 John Baldwin 4 ChEn 425 – Process Creation – Slide 7 Diagram Statement of the Problem Raw materials (C 2 H 4 , Cl 2 ) Process Flowsheet? Desired Product (C 2 H 3 Cl) Needed to define the state of each : 1) Mass (flow rate) 2) Composition 3) Phase (solid, liquid, gas) 4) Form (particle size, etc.) 5) Temperature 6) Pressure ChEn 425 – Process Creation – Slide 8 Basic Types of Process Operations Chemical reaction Separation of chemicals Phase separation Change of temperature
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This note was uploaded on 03/26/2008 for the course CHEN 425 taught by Professor Johnbaldwin during the Fall '03 term at Texas A&M.

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Process Creation - Homework Assignment#1 1 For the...

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