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Lab talk, the good, the bad, and the ugly
3D Printer
IPA recovery system interests?
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<blockquote data-quote="Chad Gardner" data-source="post: 334732" data-attributes="member: 20677"><p>I think I see your point about the loss of IPA, but the manufacturers recommend 95%+ IPA or ethanol for most resins, don’t they? </p><p>I just did a webinar on Bego Permanent Crown resin and they recommend 95%+. </p><p></p><p>BTW, that’s what’s in the photos above. Look at the bottom of the Formwash. That resin saturates IPA fast! Initial hydrometer reading was 20 proof, 40% IPA. I believe it was 2.5 gallons initially in the Formwash and I recovered 2.1-2.2 gallons at 97.236% purity. I have the exact numbers at the office but pretty sure that is what I got. That stuff was so saturated the Formwash wouldn’t start the spinner. I used it as a prewash while beta testing from August 2020 to January 2021, so I know I lost some to evaporation, but was amazed how it turned what most would consider useless IPA into almost pure IPA. </p><p>Again, I may be wasting my time but it works for me. I even have a way of pressure washing from the clean tank at 50-60psi and all the dirty IPA goes back into the dirty tank to be refiltered. Completely closed system. Only issue is IPA fumes when I open the wash tank, but I have a filter ventilation system I’m going to install.</p><p></p><p>So you think I’m wasting my time trying to create this product or you see it as unnecessary? I’m looking for all points view.</p></blockquote><p></p>
[QUOTE="Chad Gardner, post: 334732, member: 20677"] I think I see your point about the loss of IPA, but the manufacturers recommend 95%+ IPA or ethanol for most resins, don’t they? I just did a webinar on Bego Permanent Crown resin and they recommend 95%+. BTW, that’s what’s in the photos above. Look at the bottom of the Formwash. That resin saturates IPA fast! Initial hydrometer reading was 20 proof, 40% IPA. I believe it was 2.5 gallons initially in the Formwash and I recovered 2.1-2.2 gallons at 97.236% purity. I have the exact numbers at the office but pretty sure that is what I got. That stuff was so saturated the Formwash wouldn’t start the spinner. I used it as a prewash while beta testing from August 2020 to January 2021, so I know I lost some to evaporation, but was amazed how it turned what most would consider useless IPA into almost pure IPA. Again, I may be wasting my time but it works for me. I even have a way of pressure washing from the clean tank at 50-60psi and all the dirty IPA goes back into the dirty tank to be refiltered. Completely closed system. Only issue is IPA fumes when I open the wash tank, but I have a filter ventilation system I’m going to install. So you think I’m wasting my time trying to create this product or you see it as unnecessary? I’m looking for all points view. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
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IPA recovery system interests?
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