Re: Ferrous to Ferric Oxalate [was Re: patents]

It doesn't mention the final strength. But you might be able to extrapolate
that info from the amounts of ferrous oxalate and oxalic acid added to the
water. I would say the strength is over 20%. Maybe more.

The components (by bad luck) I seem to have on hand: I erroneously was sent
ferrous oxalate from my supplier, I have the oxalic acid, I have water, and
I have hydrogen peroxide although not 25% (I'm going to try to adjust this
by lowering the H2O requirement. I'm going to give it a try and I'll let you
know.

~m

----- Original Message -----
From: "Loris Medici" <mail@loris.medici.name>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, February 15, 2006 10:25 AM
Subject: RE: Ferrous to Ferric Oxalate [was Re: patents]

Two questions Michael:

What is the strenght of the final solution?

Are the named compounds easily obtainable?

TIA,
Loris.

-----Original Message-----
From: Michael Koch-Schulte [mailto:mkochsch@shaw.ca]
Sent: 15 Şubat 2006 Çarşamba 17:51
To: alt-photo-process-l@sask.usask.ca
Subject: Ferrous to Ferric Oxalate [was Re: patents]

Thanks got it now.
It's interesting that the Curtin method doesn't seem to be commonly
mentioned as a method for producing Ferric Oxalate for alt.

The Curtin method, in a nutshell:

360 parts per weight of ferrous oxalate hexahydrate
126 parts per weight of oxalic acid dihydrate, suspended continuously
in, 2000 parts per weight of water at 20C. add to this mixture, 140
parts per weight of hydrogen peroxide (25%) stirring continuously for 20
minutes. Reaction is complete in 30 minutes.

It seems to good to be true. Does anyone know if it works consistently?

~m
Received on Wed Feb 15 10:35:22 2006