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!
  • Students Click Here

*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


lowest vacuum achievable in a vacuum distillation column

lowest vacuum achievable in a vacuum distillation column

lowest vacuum achievable in a vacuum distillation column

I want to separate two high boiling point components from each other. (Atmospheric Boiling points 250-300C vs 300-500 C)
Thus, I need deep vacuum. I investigate the option of using a traditional vacuum distillation unit followed by an evaporator. (There are other options I am investigating as well but my question is around this one)
Evaporators (short path) can go less than 1 mbara vacuum. For typical distillation unit, I have seen vacuums as low as 100 mbara.
Does anyone know what is the lowest vacuum achievable in a typical distillation column?

RE: lowest vacuum achievable in a vacuum distillation column

Typical vacuum distillation units in petroleum refineries operate between 10-50 mbara absolute pressure (950-980 mbar vacuum) on the column top. There are industrial units designed and operating with less than 1 mbar absolute pressure. Google GEA Jet and Graham-MFG. They have a lot of great articles on vacuum.


Process Engineer, MSChE

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!


White Paper: Industrial Control Basics: Contactors
A contactor is an electrical device used for switching an electrical circuit on or off. Considered to be a special type of relay, contactors are used in applications with higher current carrying capacity, while relays are used for lower current applications. Download Now
Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). 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