×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

1-Hexene process
3

1-Hexene process

1-Hexene process

(OP)
gents,
Good morning/evening ,We are working at 1-Hexene plant production. trimerization Ethelene with Chrome catalyst to produce 1-Hexene.
we faced lately issue , that upstream the CSTR reactor get plugged & that cause the catalyst flow came down , any suggestion & help.

thanks,

RE: 1-Hexene process

What is the usual duration between pluggings?

Good Luck,
Latexman

RE: 1-Hexene process

(OP)
Good morning/evening ,
After injection the catalyst to CSTR reactor by positive displacement pumps ( almost 2 weeks the stroke increased to 100% & the catalyst flow came down to the minimum
the injection point to the CSTR reactor get plugged , any advice .

Thanks,

RE: 1-Hexene process

Attach a drawing or sketch of "injection point" and show where/how it plugs.

Good Luck,
Latexman

RE: 1-Hexene process

Hello kadiaa,

I'm assuming that the catalyst is some liquid phase and not a slurry? I would hazard to guess that your ethylene is polymerizing at the point where its mixing with the catalyst. Slurry can plug on its own. Check your operating conditions at the injection point. These types of reactions are notorious for fouling up equipment. It would also be helpful if you could provide more details.

RE: 1-Hexene process

@ps6788,@latexman,
Though I know little of the configuration of this CSTR, this is my suspicion too. If this a single injection point, it may be located at a place where is poor mixing. There ought to be multiple injection points located in regions with high turbulence. We need to see a sketch or GA of this CSTR with injection point.
Presume this is an exothermic reaction - if so, are there hotspots in this CSTR ?

RE: 1-Hexene process

(OP)
Good morning/evening ,
Thank you all for your replied & support . we suspect there is some balance change for our catalyst amount ( Ethylene benzene + Aluminum alkyl + pyrrole + chrome) mixer that may cause this issue , still under troubleshooting . any body has experience with 1-Hexene process .

RE: 1-Hexene process

How is the catalyst recovered? Can we see a PFD which includes catalyst recovery operation ? Looks like this is Chevron - Phillips process ?

RE: 1-Hexene process

(OP)
Good morning/ Evening georgeverghese ,
Actually we are not recovering the catalyst , we are kill it by using (2 ethyl hexanol ) due to ALUMUNIUM ALKYLE is pyrophoric .yes it is.

Thanks.

RE: 1-Hexene process

(OP)
I trayed to attached the information , but unfortunately I can't .

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



News


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