C6-C10 Tower System Overview

C6-C10 Tower System Overview

• T-400 (C6-C10 Tower): 5’D x 72’3”L; separates C6-C10 light products from C12-C30 heavy products. Focuses on maintaining C12 concentration in the overhead and C10 concentration in the bottoms.
• D-401 (Coalescer): Removes water from the product stream; 2’D x 9’L with a containment boot.
• E-401 (Feed Preheater): Shell and tube exchanger that heats C6+ feed with 100 psig steam; not used if feed comes directly from T-380.

Vaporization and Condensation

• E-403 (Feed Vaporizer): Vaporizes C6+ feed using 400 psig steam; connected to T-400.
• E-400 (Condenser): Cools and condenses overhead vapor from T-400 using cooling water and provides reflux.
• D-400 (Reflux Drum): 4’D x 20’L; separates reflux liquid for T-400 and non-condensable vapor; collects water into D-430.

Pumping Systems

• P-400A/B (Reflux & Product Pumps): Single-stage centrifugal pumps using 20 HP motors to circulate reflux and route feed.
• E-405 (Reboiler): Kettle-type design; heats T-400 bottoms with Dowtherm.
• P-405A/B (Bottom Pumps): Routes liquid bottoms to T-430; also single-stage centrifugal pumps with 20 HP motors.

C6 Tower Operations

• T-410 (C6 Tower): 4’D x 52’3”L; extracts C6 fraction while controlling C8 and C6 concentrations.
• E-410 (Condenser): Cools overhead vapor with cooling water, providing reflux for T-410.
• D-410 (Reflux Drum): 4’D x 10’L; separates liquid for reflux and feed.

Hexene Processing

• T-411 (Hexene Purification Column): 8’D x 119’L; purifies hexene to ≥99.0% purity, removing contaminants.
• E-406 (Reactor Preheater): Heating hexene feed before R-411A/B reactors.
• R-411A/B (Hexene Reactors): Fixed bed up-flow reactors employing activated alumina to increase boiling points for distillation.

C8 and C12 Towers

• T-420 (C8 Tower): 3’6”D x 76’3”L; separates C8 and C10 while maintaining specifications for concentrations.
• T-430 (C12-C24 Tower): Separates C12-C20 from heavier fractions; focuses on controlling C24, C22, and other concentrations.

Reflux and Product Management

• D-430 (Reflux Drum): Manages reflux for T-430 and condenses non-condensable vapors.
• Z-430/Z-431 (Ejectors): First and second stages reduce pressure overhead for better separation.
• P-430A/B (Pumps): Circulate reflux to T-430 and route feed to T-440.

Final Product Collection

• Z-435A/B (C30+ Centrifuges): Separate heavy polymers from C30+ product using centrifugal force.
• P-833A/B (Clean Product Pumps): Route clean C30+ product to storage using 10 HP motors.
• D-431 (Accumulator): Collects C24-C28 product stream prior to storage.

Staging and Filtering

• F-443/F-430 (Feed Filters): Remove particulates before reaching respective towers.
• E-434 (Exchanger): Transfers heat efficiently between feeds and product streams across multiple processes.### C24-C28 Product Pumps
• P-431A/B pumps are single-stage centrifugal pumps driven by 25 HP, 3550 RPM induction electric motors.
• Installed to route C24-C28 product to storage.

C24-C28 Product Cooler

• E-432 is a shell and tube heat exchanger cooling C24-C28 product.
• Utilizes untreated boiler feed water for cooling on the shell side.

C24-C28 Product Filter

• F-431 is a cartridge type filter removing molecular sieve fines from C24-C28 product before storage.

C12 Tower Setup

• F-444 acts as a feed strainer, removing particulate matter from T-440 feed.
• E-443 preheats the C12 feed using 400 psig steam on the tube side.

C12 Tower Operations

• T-440 separates C12-C24 with a diameter of 4’6” and a length of 81’4”.
• Two control objectives: maintain C14 concentration in overhead product and C12 concentration in bottoms.
• E-440 condenses overhead vapor, providing reflux or routing to storage via D-440.

C12 Tower Vapor Management

• E-441 cools and condenses vent vapor utilizing cooling water on the tube side.
• Z-440 and Z-441 serve as ejectors to reduce overhead pressure in multiple stages.

C12 Pumps and Strainers

• P-440A/B pumps circulate reflux to T-440 and route C12 product to TK-812.
• F-440 filters remove particulate from T-440 feed.

C14 Tower Configuration

• F-453 filters T-450 feed stream for particulates.
• T-450 separates C14-C24 with similar dimensions as T-440, ensuring proper product specification.

C14 Tower Distillation Process

• E-450 and D-450 manage cooling/condensing and reflux, respectively.
• Z-450 and Z-451 function similarly to their C12 counterparts for pressure regulation.

C14 Pumps Functionality

• P-450A/B handle reflux to T-450 and route C14 product to TK-814.
• F-450 and E-452 manage particulate removal and cooling of end products.

C16 Tower Overview

• F-463 ensures clean feed for T-460, which separates C16-C24 at specified concentrations.
• E-460 cools overhead vapor; D-460 serves as a reflux drum.

C16 Management Equipment

• Z-460 and Z-461 regulate vapor pressure through a two-stage ejector setup.
• P-460A/B pumps circulate reflux to T-460 and route C16 products.

C18 Tower System

• F-473 filters particulates from T-470 feed before separation.
• T-470 operates to separate C18-C24 within specified concentration limits.

C18 Tower Heat Management

• E-470 and D-470 cool and condense overhead vapor; E-471 handles vent vapor condensation.
• Z-470 and Z-471 reduce overhead pressure over two stages.

C18 Pumping System

• P-470A/B pumps handle reflux and route C18 products efficiently to storage or other units.
• E-472 cools the C18 product prior to storage.

C20-C24 Heat Recovery and Product Cooling

• E-476 is a kettle-type heat exchanger chilling C20-C24 product with boiler feed water.
• E-477 cools the final product before storage application.

Process Water Components

• D-433 ensures a steady supply of process water; also serves as a vent gas collection point.
• E-433 cools untreated boiler feed water alongside process water.
• E-480 is installed as an after-condenser for the common ejector, enhancing efficiency.
• P-433A/B pumps route process water to several applications for effective cleaning and wash operations.