Acetone Production Plant Design

8/2/2019 Acetone Production Plant Design

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Your Role: You are a manager for RiceUtility Production, and you missed themeeting with the consultants design team.Youve been given their PowerPoint file.

You have to let the other two managers onthe committee know what you think of theproposed design.

Sample Chemical Engineering

Student Team PowerPoint forAnalysis


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Note: Throughout, orange slides like thisone will ask you questions to help you pickout things you want to remember about

designing team PowerPoints.For more help or background information:Making Logical TechnicalArguments PPT; Team Presentations in Chemical and BiomolecularEngineering PPT

Sample Chemical Engineering

Student Team PowerPoint forAnalysis


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Acetone Production PlantDesign

December 2, 20__

Student Team AFrom Ace Consultants


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Project Motivation

Rice UP - acetone requirement for

increased Anphal production

Maintain ROI at higher production rate


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Project Goals

Increase Acetone Production by 30%

Minimize Plant Costs

Operating costs

Additional capital purchasing costs


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. eac or an r pp ng o umn1. Reactor and Stripping Column

1. Reactor and Stripping Column


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Sample Chemical EngineeringStudent Team PowerPoint for

Analysis

What was the point of the processflow diagram you just saw? Is thisthe teams recommendeddesign?

What is the team trying to tell youabout their work?

Are you impressed by their designso far? Why is it good?

Go back for a second look.

What should the heading be?

In regard to the previous slide:


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2. Acetone Purification


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3. Isopropyl Alcohol Recovery Column


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Process Specifications

99.9% Pure Acetone

90% Pure Hydrogen

TOC


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Cost Analysis

$243,000 /yr profit from given base case

~1 per pound of acetone product profitmargin


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If these are the specifications, whatcriteria will you be looking for in theteams design?

What does the team need to show youto convince you the design will dowhat is needed?

Did the team meet these requirementsin its design solution? How do youknow?



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Modeling Issue

UNIFAC VLE Model does not accuratelypredict x-y diagram at high acetoneconcentrations

NRTL is best property package for

acetone/water binary systemBased on DeChema VLE data


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Options

1) Use extractive distillation methods

2) Purchase 39MM lb acetone (openmarket)

3) Produce 97.6% acetone


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1) Extractive Distillation

3 Solvents 1,2 dimethoxyethane (Diglyme)

Acetonitrile

N-Methylpyrrolidone (NMP)

Case Study: Diglyme

Prohibitive Cost $6.765 MM /yr to purchase Diglyme

Additional Column


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How do you know the cost of extractivedistillation Is prohibitive?

Why is the Diglyme case of interest?

Is an additional column a solution orpart of the cost?

Is extractive distillation theh usualmethod of making acetone?



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2) Purchase Acetone

Purchase 39 MM lb per year acetone for$10.92 MM

Shut down acetone production

Minimize investment losses


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How does the team know the cost willbe this much?

What has been the cost trend foracetone in the past?

How much of a loss will be avoided?

How do you know?



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3) Produce 97.6% Acetone

Need to add 3 heat exchangers

Renegotiate deal?

Break-even point


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What about the break-evenpoint?

What would it cost to produce

acetone at this purity?

Is that purity acceptable?

What is this slide telling us aboutthe option?

What do these three bulletpoints have in common?


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Recommendations

Buy acetone off open market

Dissolve acetone production facility

Recover maximum amount of lost $$


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Conclusions

Adjustment of property package identifiedseparation difficulty

Possible solutions Extractive distillation

Purchase acetone on the open market

Renegotiate contract for lower acetone purity

Purchase acetone on open market is best


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Why put the conclusion after therecommendation?


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TAKE AWAY POINTS

After viewing this PowerPointWhat are your take-away lessons thatyou will apply to your own PowerPointnext time?


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This team puts its conclusions at the end and didnot use informative headings on its process flowdiagrams. The headings do not outline the

argument.

A pitch that presented the recommendation firstand gave evidence of calculations to support

claims would have been more persuasive.The PPT cant reinforce the oral message orpersuade readers on its own.

For more help:Making Logical Technical Arguments PPT; TeamPresentations in Chemical and Biomolecular Engineering PPT

Notes

Acetone Production Plant Design

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