you can send the isopropyl alcohol to me! Seriously - I'll even pay the shipping - I'm an hour north of Fresno.

PM me so we can trade details...

Deionized water stops being deionized water when you add ions to it. A few grains of common table salt should take care of a gallon. In all probability whatever you cleaned with the DI water added enough ions to it to take it out of the DI category, especially if metallics are present. So whether or not you can pour it down the drain or use it to top off a lead acid storage battery likely depends on what imputities, inorganic ions or organic compounds it may have picked in your cleaning process. Note that the deionization process doesn't deal with bacteria, viruses and other organics some caution is a good idea if you are planning to drink the stuff. Also the literature indicates that drinking the stuff in quantity may upset the human body's mineral balance.

It's been my experience that DI water that sits around in a plastic container for a few weeks drops down to below the one megohm resistivity level from what it pulls out of the air or the container.

Ed Weldon

RECYCLE IT FOR ANTI-FREEZE

We recycle IPA after distiiling it. DI water is no worse than rain water. Is there a local code about disposing this?

I would get the disposal permit from the government. Better safe than sorry legally. You never know what accidents could happen.

A few suggestions: (1) Convert the IPA to Windex, and use for cleaning employee's car windows, etc. (2) Use the DIW to water plants, either inside or outside, including trees, the building, assuming there isn't too much cutting fluid in the eater. (3) Or give the liquids to a local University, a window-washing company, etc. A University (or perhaps even a high school chem lab) could distill the IPA if necessart to purify it for their use.

A gallon a month...

What's to say you couldn't store it until you had enough to warrant firing up the still?

For that matter why not have the housecleaning crew use it for general cleaning and degreasing jobs in conjunction with or without conventional detergents? you should be able to use a gallon a month that way easy. Same with the water.

There is always something like this too.

http://www.kompass.com/cooking-heating-appliances-domestic-solid-liquid-fuel/space-heaters-alcohol-fired-domestic/clist/CH_GS_L_3_I_en_Z_WW_F_53210503_C_4076033

Just damp the alcohol into gas tank of your car so you would have a free ride. Be carefull to add alcohol when tank is not empty.

I want to thank all of you.

A lot of great suggestions / ideas.

I believe, once again, the fine people of CR4 have supplied great advice.

Thanks again, George...

If any heat or steam source or possible electrically operated or solar based heating facilities available, go for distillation plant as per requirement, recover both ISOPROPYL and DISTILLED WATER of purest grade from the condensate and recycle for your own use and save the cost of fresh purchases. Purification by distillation and recycling seems to be a workable idea than disposal. Devise a suitable system.Alcohol evaporates at a much lower temperature energy than water.

As 99.9% isopropanol in water is readily combustible, combustion is the easiest route. Options include tipping small quantities into a much larger liquid fuel tank so as to burn the blend in a heating furnace, for example, to using it to start a bonfire - just be careful when striking the match, and no, do not offer it to an infernal combustion engine unless that engine has been adapted specifically to burn the fuel.

However, 99.9% isopropanol might be considered an off-the-shelf reagent or solvent to some, perhaps?

I would like to make the suggestion that you consider switching to denatured ethanol instead of IPA. Ethanol is non-toxic and lowers the risk of skin absorption by your employees. It also simplifies disposal/spill issues since it is non-toxic.

you might also consider dispensing with the alchohol altogether and switch to water/ Trisodium Phosphate in the first ultrasonic bath followed by a di water ultrasonic bath. then you can use the water from the second bath with fresh tsp to refill the first. then the only waste stream will be water and tsp (detergent.) and it can be used for mopping the floor. it is very dangerous to use flammable materials in ultrasonic cleaners due to the risk of ignition from the high voltages involved in driving the transducers. Branson and other UT cleaner manufacturers refuse to warrant any cleaner that has been used with flammable solvents.

http://www.bransoncleaning.com/faq.asp#What_cleaning_solution_shouldnt_I_use

Believe it or not I've actually had very good luck with "Dawn" brand liquid dishwashing detergent.