×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

White-spirit
3

White-spirit

White-spirit

(OP)
I've a solution of White-spirit with a known concentration of mercaptans and I want to vary this concentartion by dilution; the problem is that I have not a pur White-spirit for this. I would like, so, to know if there is an other solvant with which I can dilute my solution.

thanks advanced.

RE: White-spirit

Hi,
If you say white spirit you mean Ethanol right, I suppose Propan-1-ol is a better solvent than ethanol the only problem is that it is hygroscopic, so better handle carefully.

If you are not satisfied with my answer, Can you put your question in a better way giving chemical names if possible.

RE: White-spirit

I guess there are several different types of white-spirits around the world. My interpretation of white sprit is a heavy naphtha/ light kerosene type of hydrocatbon liquid derived from crude oil or hydroprocessed, low in octane, low in aromatics and used mainly as a solvent.
You also mention mercaptans which is common in un-hydroprocessed naphtha/Kerosene.
From that I would say that any naphtha type, clean paraffin (e.g. Hexane, heptane) etc would be equally good solvent, if thats not present an unleaded gasoline could also be used.

RE: White-spirit

If I am right, "white spirit" is an odorless, mostly paraffinic, hydrocarbon solvent with a boiling range of 153 to 197 oC. Not anymore if it contains mercaptans. Of those in this boiling range one could mention n-amyl mercaptan (BP: 126oC) and heavier. In general, these are objectionable because they impart odour and may cause darkening of cooked varnishes and resins. Specifications for spirits ask for mercaptans to be NIL, or 2 ppm as a maximum, thus your intention of just diminishing their concentration must be very "site-specific".

Depending on their use (architectural finishes, painting, etc.) mineral "spirits" are classified as: regular, odorless, high-flash, and high-solvency.

The solvent properties that interest you were not given. If you are just looking for similar boiling points, "regular" (Stoddard) solvent, and Shellsol D40 may be acceptable additions. In this sense, a "high-flash" aromatic naphtha with an IBP 154oC and a dry point of 177oC devoided of mercaptans, may be applicable. If your "spirit" follows a given specification you should look for more details than just a distillation range. Good luck.

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!


Resources