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

----- Original Message -----
From: "Alberto Novo" <alt-list@albertonovo.it>
To: <alt-photo-process-L@usask.ca>
Sent: Wednesday, February 15, 2006 1:12 AM
Subject: Re: patents

> Michael Koch-Schulte wrote:
>
> > I get the first page 1899674 but 334904 gives me something else, a "yarn
> > stripper". Could you check the number again. Thank you. It's
coincidentally
> > something I'm very interested in.
>
> 334904 is the Canadian patent, so you need to check
> http://patents1.ic.gc.ca/intro-e.html
>
> If you want, I can send you both offlist.
>
> Alberto
Received on Wed Feb 15 09:50:36 2006