Podcast
Questions and Answers
What is the main purpose of the Fractionation Section?
What is the main purpose of the Fractionation Section?
To refine olefin fractions into various components and products.
How does TK-800 assist during feed upsets?
How does TK-800 assist during feed upsets?
It provides two days of storage capacity to maintain feed rate.
What happens to the entrained water in the C6+ feed?
What happens to the entrained water in the C6+ feed?
It drops into the containment boot and is routed to D-353 for degassing.
What is the purpose of the C6-C10 Tower Feed Preheater, E-401?
What is the purpose of the C6-C10 Tower Feed Preheater, E-401?
What are the outputs from T-400 (C6-C10 Tower)?
What are the outputs from T-400 (C6-C10 Tower)?
Where does the overhead vapor from T-400 go?
Where does the overhead vapor from T-400 go?
What is done with the liquid from the bottom of the C6-C10 Tower Reflux Drum?
What is done with the liquid from the bottom of the C6-C10 Tower Reflux Drum?
What heating fluid is used in E-405 (C6-C10 Tower Reboiler)?
What heating fluid is used in E-405 (C6-C10 Tower Reboiler)?
How is the condensate from E-413 managed?
How is the condensate from E-413 managed?
What role do P-405A/B pumps serve in the process?
What role do P-405A/B pumps serve in the process?
What is the purpose of T-410 (C6 Tower) in the separation process?
What is the purpose of T-410 (C6 Tower) in the separation process?
What role does E-410 (C6 Tower Condenser) play in the process?
What role does E-410 (C6 Tower Condenser) play in the process?
How does D-410 (C6 Tower Reflux Drum) manage water separation?
How does D-410 (C6 Tower Reflux Drum) manage water separation?
What is the function of the hexene driers (D-412A/B) in the process?
What is the function of the hexene driers (D-412A/B) in the process?
Describe the heating process of T-410's bottom liquid stream.
Describe the heating process of T-410's bottom liquid stream.
What is the purpose of the catalyst bed in R-411A/B (Hexene Reactors)?
What is the purpose of the catalyst bed in R-411A/B (Hexene Reactors)?
How is the hexene reactor effluent processed after exiting R-411A/B?
How is the hexene reactor effluent processed after exiting R-411A/B?
What streams are generated from T-411 (Hexene Purification Column)?
What streams are generated from T-411 (Hexene Purification Column)?
What are the end destinations for the high-purity 1-hexene product?
What are the end destinations for the high-purity 1-hexene product?
What is the role of P-413A/B (Hexene Purification Column Bottoms Pumps)?
What is the role of P-413A/B (Hexene Purification Column Bottoms Pumps)?
Study Notes
Fractionation Section Overview
- The Fractionation Section refines olefin fractions into various components and products.
- Maintains operation during feed upsets using TK-800 (C6+ Storage Tank) with a two-day storage capacity.
C6-C10 Tower Operations
- C6+ feed is processed in D-401 (C6-C10 Tower Feed Coalescer) to remove water.
- Heated using E-401 (C6-C10 Tower Feed Preheater) with 100 psig steam, not needed if fed directly from T-380 (Debutenizer).
- Partially vaporized in E-403 (C6-C10 Tower Feed Vaporizer) by 400 psig steam before entering T-400 (C6-C10 Tower).
- T-400 separates feed into overhead vapor stream (C6-C10) and bottom liquid stream (C12-C30+).
- Overhead vapor is cooled in E-400 (C6-C10 Tower Condenser) and collected in D-400 (C6-C10 Tower Reflux Drum).
Liquid Routing and Recycling
- P-400A/B pumps recover liquid from D-400 for reflux back to T-400 or as feed to T-410 (C6 Tower).
- Bottom liquid from T-400 routed to E-405 (C6-C10 Tower Reboiler) for heating before returning to T-400.
C6 Tower Specifics
- Heated C6-C10 feed enters T-410 (C6 Tower), separated into overhead vapor stream (C6) and bottom liquid stream (C8-C10).
- C6 overhead stream is cooled in E-410 and collected in D-410 (C6 Tower Reflux Drum).
- Entrained water and non-condensables are managed through corresponding surge and vent drums.
Hexene Production Process
- Dried hexene from D-413 is routed to Hexene Reactors R-411A/B, heated in E-406 (Hexene Reactor Preheater) with 60 psig steam.
- Chemical reaction in reactors converts ethyl-vinylidene to 3-methyl-pentene, raising boiling points.
Hexene Purification Column
- Hexene reactor effluent enters E-407 (Hexene Purification Column Feed Cooler) before moving to T-411.
- T-411 separates the effluent into three streams: overhead vapor (99% 1-hexene), side-draw (high-purity 1-hexene), and bottom liquid (C6 purge).
- Overhead vapor is condensed in E-408, with condensed phases routed to D-411.
Final Streams and Storage
- Side-draw stream from T-411 is cooled in E-409 and then stored in Unit 1791 TK-31/36/37.
- Bottom liquid from T-411 is heated in E-414 (Hexene Purification Column Reboiler) for temperature control before routing to Unit 1191.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz explores the purpose and processes involved in the fractionation section of olefin production. It covers the condensation and separation of various components, including the role of storage tanks and coalescers during operational challenges. Test your knowledge on the intricacies of chemical engineering in fractional separation.
