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

Aqueous-organic phase separation

Aqueous-organic phase separation

Aqueous-organic phase separation

We have an organic phase with C10+ alkenes and toluene and a basic aqueous phase. We are going through carbon beds quickly. The carbon bed removes the cloudy rag layer very well for about a day and that's it. We need the basic solution to dissolve impurities from the catalyst.

The idea was that the aqueous phase would separate easily taking with it the impurites from the polymerization reaction.

Any ideas on an aqueous-soluable agent that would help separate? We could remove traces of an organic in the next step, which is distillation.  

RE: Aqueous-organic phase separation

If I understand your proposition, the aqueous layer gets discarded, and you're trying to get rid of an emulsion / facilitate the water/organic separation process.  Assuming that's within the ballpark of the truth, might it be possible to add a small amount of a salt of some sort to the mixture just before it goes to separation?  That would break up any emulsions, and the now-ionic nature of the aqueous phase should make it separate more sharply/clearly from the organic phase--at least it should if I recall emulsion-breaking from my organic chem lab days in the '70s.

RE: Aqueous-organic phase separation

Heat will also help drive the organic phase to separate out.  If you could heat the material it would probably help.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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