[Pristine Clean]

I have been told you can recharge the DI Resin with dishwasher salt!

Is this true and if so how much do you use.. thanks...


Dave

[Peter Fogwill]

Not true.

Peter

[davids3511]

http://www.reefkeeping.com/issues/2008-09/nftt/index.php

[davids3511]

Although I don't fancy the job of trying to get rid of loads of caustic soda and muriatic acid after the job is done.

[Pristine Clean]

http://www.reefkeeping.com/issues/2008-09/nftt/index.php

Yes I have seen this.

I was told, that you could recharge with dishwashing salt. Just add the dishwasher salt to the salt pot. Let the water run throu but not into the RO unit.

So if it can be recharged this way how often do you require to change the DI Resin. Regardless of the TSD metre reading.

Dave

[Peter Fogwill]

Although I don't fancy the job of trying to get rid of loads of caustic soda and muriatic acid after the job is done.

You can add both substances together until you are left with something that is safe.

Peter

[cherubs cleaning]

you can only recharge softening resin


you can not recharge polishing resin




jerry

[davids3511]

No, you can recharge polishing resin. That is what the link is about.

Alex has stated a few times that in other countries there is a thriving resin regeneration industry but in the uk the virgin resin is too cheap to make regeneration pay on a large scale.

[Mr H]

Check out http://www.zen21993.zen.co.uk/141/index.html

Regards
MR H

[cherubs cleaning]

davids3511


whith salt no


sorry i did not read  it all




jerry

[davids3511]

davids3511


whith salt no


sorry i did not read  it all




jerry

I fancy having a go at it just to see if it works. You need caustic soda and hydrochloric acid to do the regenerating. The caustic soda is easy to get but I am struggling a bit with the hydrochloric acid.

[Niall McAllister]

acording to the article, your granny should have all the stuff you need

[davids3511]

Its just that they don't give any details of the strength of the hydrochloric acid. They talk about it as though it is 100% and needs diluting but if you read the bottle they use it is only 22%. They then dilute it down with water so it is about 11% acid. I picked up some patio cleaner in my local selco yesterday that is 10% hydrochloric acid. I guess that would do if I don't dilute it.

[DASERVICES]

Guys be very careful trying this process as you could end up making sulphuric acid.

[davids3511]

Guys be very careful trying this process as you could end up making sulphuric acid.

How do you work that out Doug? Not questioning you because I don't the the chemistry knowledge to do so but would be interested in how you can make sulphuric acid from Hydrochloric acid and caustic soda. Caustic soda is NaOH and hydrochloric acid is HCl. Were would the sulphur come from to make the sulphuric acid? Is it already in the resin?

[DASERVICES]

Hi David,

Would have to get my notes out if I can find them after my days training. But was surprised yes there is a stage when the water turns to sulpuric acid but then needs to be balanced off. Resin holds the "h" and "o" so when you process the water through it the h & o's are relased giving you h2o.

All a bit complicated but yes was surprised that you can get sulphuric acid. To reverse the process of resin you will need to replace the h and o at the same time taking the ca etcc..

This is going over me head, will try and look at me notes if I can find them.