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Chemistry Forums for Students => Organic Chemistry Forum => Organic Chemistry Forum for Graduate Students and Professionals => Topic started by: opsomath on July 21, 2014, 09:30:43 AM

Title: Venturi-bath low-vac pumps
Post by: opsomath on July 21, 2014, 09:30:43 AM

Hi all,

I've got some money to spend on lo-vac pumps (we have no house vac at my college) and I was considering buying a few of these: http://www.certifiedmtp.com/lab-companion-ve-11-electric-aspirator-pump/

I've used some kind of circulating-bath pump like this before, but I can't remember whether they were this brand or Cole-Parmer (which are more expensive). Does anyone have any experience with this?

Thanks! Sorry for not posting in awhile, been running summer research.

Title: Re: Venturi-bath low-vac pumps
Post by: Babcock_Hall on July 29, 2014, 10:24:48 PM

I don't know the answer to your question, but if you find one you like, please let me know.  We often need to remove water and toluene in my lab, and I am not satisfied that we are pulling a strong enough vacuum to keep our bath temperatures low.

Title: Re: Venturi-bath low-vac pumps
Post by: opsomath on June 23, 2015, 05:50:39 PM

The Venturi pumps are going strong and suffice to remove ethyl acetate, hexane, and methanol. Toluene comes off too albeit taking a bit longer - I don't use it enough as a solvent in rotovap to be 100% sure of that one. We did wind up buying the below model.

Title: Re: Venturi-bath low-vac pumps
Post by: Babcock_Hall on June 23, 2015, 05:59:35 PM

Do you mean the Certified Lab Companion model?