Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Caustic tower fouling in ethylene plants

Caustic tower fouling in ethylene plants

Caustic tower fouling in ethylene plants

I´m searching about fouling in caustic towers.

Acid gases, like CO2 and H2S are removed from the cracked gas in an olefin plant by countercurrent contact and scrubbing with recirculating caustic solutions.

Fouling, emulsification anf foaming are the 3 major problems encountered in the caustic system.

Caustic tower fouling is thought of as a function of acetaldehyde concentration and an aldol condensation reaction. In the presence of caustic, carbonyl compounds can undergo conensation to form heavy materials. The product of this reaction has characteristically yellow color. It is called "yellow oil".

I need more information about this phenomena and about caustic tower operation.

I´m looking for a paper or another article that could help me.

RE: Caustic tower fouling in ethylene plants

Interesting.  We had a two stage circulating caustic tower in our ethylene plant (feedstock was ethane) after the cracked gas compressor.  Upper loop strength was about 10% or so caustic I believe, lower loop design was supposed to be 0.5% but it ran higher due to problems in too much CO2 in the scrubbed gas.

As far as I recall, we never had any foaming or fouling problems.  Haven't seen any papers on this that I could direct you to.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close