From: Ellen M. Sweet <ems325**At_Symbol_Here**CORNELL.EDU>
Subject: Re: [DCHAS-L] Quick question for the group
Date: Thu, 2 Jul 2015 10:11:32 +0000
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: CO1PR04MB3480338CF9118AA525A426F9A970**At_Symbol_Here**
In-Reply-To <5E3BC68E-ACAD-49BB-9962-CB70AF0547BC**At_Symbol_Here**>

Hi everyone,

A couple of years we had a group work with a company to see if they could purify some solvents and reuse for their own purposes.. They ended up purchasing the recycling unit, to the tune of $20,000. But, they reduced the volume of spent solvents they were generating by quite a bit.

This goes into our Waste Minimization report now. We are also a LQG. This process is exempt from the waste regulations. But, I would clarify that with your state, just to be sure.


Good Luck!



Ellen Sweet

Laboratory Ventilation Specialist

Department of Environmental Health and Safety

Cornell University






From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Steven Kirincich
Sent: Wednesday, July 01, 2015 5:43 PM
Subject: Re: [DCHAS-L] Quick question for the group


As a former organic and medicinal chemist, I can say with certainty that the ethyl acetate and hexanes do not need to be separated from each other. As long as the purification process provides a clean binary mixture, the chemists can use the recycled mixture and add either ethyl acetate or hexanes to get the desired ratio.



Steve Kirincich



On Jun 24, 2015, at 5:53 PM, Jake Hernandez <Jake.Hernandez**At_Symbol_Here**UTSA.EDU> wrote:



Our university just recently became a large quantity waste generator. We have been trying to find ways to reduce/reuse/recycle.. One of our largest wastes is from the organic chemists. The waste in question is hexane/ethyl acetate. Has anyone heard of a way to separate these two and reuse them?


Thank you,


Jake Hernandez

Safety Specilaist 2

Lab Safety Division

(210)458-5807 voice

(210)336-9509 cell


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