DI resin

[Tomoko Schum]

I just realized my relatively new DI resin has totally expired.
The last batch of resin that I loaded in April did not change the color at all. It looked all blue even after three months. I got suspicious, took TDS readings, and found that RO reading was 11 and the reading after resin was 10. :faint2:

I bought a 1.5 gallon bag of DI resin back in January 2012 from BRS but did not open the bag until last October. BRS says that the normal shelf life is 2 years (unopened). October to April is only 6 months. I should have bought a few individual single charge packs instead :Cry:, even though the unit cost is quite a bit more expensive than that of a 1.5 gallon bag :mad2:

Do any of you recharge DI resin yourself? I tried it before and found that it was more work than I care to do.
If you recharge your own resin, you can have the remainder of the 1.5 gallon bag. It's probably 2/3 full.

 

[Chameleon]

Hmmm I have never recharged resin before, but it seems like something I could do pretty easily in one of the 4 liter columns at work with a low pressure pump and some various buffers. I'll have to look into the feasibility and get back to you.

 

[nhago]

I have recharged the resin without any problems. I did buy the individual packs from BRS instead of the 1.5 gallon bag, so I knew exactly how much to pack in there.
So far so good. Never really had any problems. I think I will need to change the membrane sometime soon, though. My TDS reading is higher than it used to be going into the DI chamber, which I am sure helps to wear the resin out faster.

 

[Tomoko Schum]

I was watching the color change of my DI resin. For years I used my TDS meter periodically to see if it's time to change the resin. The color change was usually pretty accurate. I should have checked the effluent TDS level sooner. I got too busy and time flew by...

The procedure of recharging a mixed bed DI resin was not difficult at all. I got in a hurry with my cats and dog running around me and spilled a large part of one resin (after separating cation resin from anion resin before the second treatment.) Wet resin beads are not fun to clean up. That was a while ago, though. I might try it again in the future. In the mean time, I will buy single-charge packs.