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  1. #1
    mrred's Avatar
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    Replacing Sulfuric Acid

    I am trying to eliminate the use of sulfuric acid from my reversal process as it is becoming expensive and a PITA to get.

    I know that Sodium Bisulphate can be used, but have not found any reference to the amount used. Does anyone know the amount to make the equivalent for a 2% 1l of Sulfuric Acid?

  2. #2

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    You can probably get it at your local autoparts store, in a 5 gallon cubetainer. Packaged and sold for filling batteries. Or try a friendly motorsports dealer, they almost always have a box sitting on the shelf in the service dept.
    Bob

  3. #3
    mrred's Avatar
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    I can't do that here (Canada), which is why it gets to be a pain. If I buy it at a parts store or a garage, they are required to fill a battery with it before I can leave. It's a controlled substance here.

    I have to by the acid at chemical supply outlets which makes it expensive and on obtainable on short notice. Sodium bisulfate I can get by the ton, no questions asked.

    I gew up with a father who was a mechanic. There was always gallons of this stuff as he used to refurbish car batteries. Where is that time transporter?

  4. #4
    Worker 11811's Avatar
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    Just gut an old battery, take out the plates, clean out the interior and take it to the store to be "refilled."
    Randy S.

    In girum imus nocte et consumimur igni.

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    http://www.flickr.com/photos/randystankey/

  5. #5
    Photo Engineer's Avatar
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    Quote Originally Posted by mrred View Post
    Where is that time transporter?
    Look for a blue Police Box with your name on it.

    Sorry you are having problems. Many US chemical suppliers will sell Sulfuric Acid by the liter or half liter. It must be dilute, but then you just compensate in the formula. If you get 37% battery acid, then use about 2.5x more. You can figure it out from here.

    PE

  6. #6
    Nicholas Lindan's Avatar
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    Quote Originally Posted by mrred View Post
    [Sulfuric Acid is] a controlled substance here [in Canada].
    Wow, Canadian winters must be really grim if folks are taking Sulfuric Acid as a recreational drug!

    Another source of Sulfuric Acid is drain cleaner - you can't use Drano in a clogged toilet but you can use acid. There are some toilet clogs you just don't want to tackle with a snake or plunger. In Cleveland the local brand is called 'Assault' - don't spill it, it's concentrated acid (unlike 38% battery acid) and puts a hole in the bath mat in seconds. Hmmm... in Canada you may have to bring the clogged toilet with you to the hardware store and have them put the acid in it for you.

    I'm with Worker - get a junk motorcycle battery - something with plugs - gut it, and have them fill it.

    There should be some way of removing the lead sulfate from the battery acid already in an old battery. Maybe plate the lead out with a battery charger and a couple of carbon rods?
    Last edited by Nicholas Lindan; 04-21-2012 at 03:11 PM. Click to view previous post history.
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  7. #7
    brucemuir's Avatar
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    Hey Red, there is a reversal recipe using sodium bisulphate.
    My notes are on my other computer but I found it in one of the main recipes floating around that I bet you have already read at one point of your investigations.

    I think it is in the Osbahr method.

    If you cant find it I'll look up what I have later tonight.

  8. #8

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    According to http://www.angelfire.com/wi/spqrspqr...wreversal.html, which refers to a fellow by the name of Fritz Brown on photo.net, you can substitute 55g of sodium bisulfate for 12mL concentrated sulfuric acid to make up 1L of dichromate bleach.

    Hope this helps.
    ME Super

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    There are eight ways to put a slide into a projector tray. Seven of them are wrong.

  9. #9
    brucemuir's Avatar
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    ME Superduper to the rescue!
    That is indeed the place I read it (not Osbahr, sorry) and I have used it successfully due to the same reason you're exploring it now.
    I did pick up some battery acid recently from a local auto parts chain store and was surprised it was fairly easy to get through that avenue. The amount you could buy wasn't very much. 2 litres maybe I forget.

  10. #10
    mrred's Avatar
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    Quote Originally Posted by ME Super View Post
    According to http://www.angelfire.com/wi/spqrspqr...wreversal.html, which refers to a fellow by the name of Fritz Brown on photo.net, you can substitute 55g of sodium bisulfate for 12mL concentrated sulfuric acid to make up 1L of dichromate bleach.

    Hope this helps.
    That was exactly what I was looking for. I read it somewhere about a year ago and could not, for the life of me, remember where.

    Thanks....Time to go and get a 5 gal bucket....

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