Improvements in the Production of a Ferric Preparation for the Purification of Sewage or other Foul Water.
Year: 1892

page_text: Date of Application, 25th Aug., 1892
Complete Specification Left, 19th May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Production of a Ferric Preparation for the
Purification of Sewage or other Foul Water.
CHARLES ANTHONY BURGHARDT of 35 Fountain Street in the City of
Manchester in the County of Lancaster, Analytical Chemist, do hereby declare
the nature of this invention to be as follows:-
My invention relates to the production of a solid non-deliquescent ferric prepara-
tion which can be used for the purification of sewage and of a dry portable form
for transmission by rail, road or sea without danger or nuisance. I prepare this
solid by making a concentrated solution of Glaubers salt (Na,SO, + 10 H₂O) or "salt-
cake' or nitre-cake" which are more or less impure sodium sulphate and add to
this solution a more or less concentrated ferric chloride solution in any suitable
proportion & mix the whole thoroughly. I then concentrate the mixture to the
crystallizing point of the Glaubers salt & run it into moulds or kegs to set solid
when it is ready for the market. By this means I prevent the running or
deliquescing of the ferric chloride by the absorption of moisture from the air, and
obtain a portable cake of a ferric chloride preparation for the purposes
specified.
Dated this 25th day of August 1892.
CHARLES ANTHONY BURGHARDT.
COMPLETE SPECIFICATION.
Improvements in the Production of a Ferric Preparation for the
Purification of Sewage or other Foul Water.
I CHARLES ANTHONY BURGHARDT of 35 Fountain Street, Manchester, in
the County of Lancaster, Analytical Chemist, do hereby declare the nature of this
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement that is to say :-
My invention relates to the production of a solid non-deliquescent ferric
preparation which can be used for the purification of sewage such preparation
being in a dry portable form for transmission by rail, road or sea without danger
or nuisance. A former invention for which I have made application for Letters
Patent No. 13316 of the year 1892 had the same object. In such former invention
I produced ferric chloride in company with sodium sulphate the latter salt as it
were occluding the ferric salt and guarding it from the dissolving action of the
atmosphere. In my present invention I obtain a similar combination but I use
ferric chloride already prepared. I prepare a concentrated solution of sodium
sulphate (Na,SO, +10 H,O) and add to the solution a more or less concentrated
ferric chloride solution in suitable proportion and mix the whole thoroughly.
I then concentrate the mixture to the crystallizing point of the sodium sulphate
and run it into moulds or kegs to set solid. When solid it is ready for the market.
By this means I prevent the running or deliquescing of the ferric chloride by the
absorption of moisture from the air and obtain a portable cake of a ferric chloride
preparation for the purposes specified as in the case of my said former invention.
I find it advisable to manufacture the solid cake or mass in such a manner as
that it does not contain a percentage of dry ferric chloride higher than 30 per cent.
In place of using ordinary commercial sodium sulphate I can use an impure
sulphate such as "salt cake or "nitre cake as it is not necessary that the
Price 81
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page_text: sulphate shall be pure so long as it is not associated with matters which would
decompose the ferric chloride.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. The method of preparing a compound containing ferric chloride of the nature
and adapted to be used substantially as set forth.
2. Preparing a compound containing ferric chloride by mixing a solution of
sodium sulphate or of a material containing a large proportion of such salt with a
solution of ferric chloride and evaporating the mixture until it will set into a solid
mass in a mould or keg or cask as and for the purpose set forth.
Dated this 18th day of May 1893.
E. K. DUTTON & Co.,
5, John Dalton Street, Manchester, Agents.