Improvements in and connected with Iron Compounds for Use in Precipitating Sewage, Purifying Waste Liquors, Colouring, and the like purposes.
Year: 1894

page_text: Date of Application, 23rd Jan., 1894
Complete Specification Left, 21st Sept., 1894-Accepted, 27th Oct., 1894
Improvements in and connected with Iron Compounds for Use in
Precipitating Sewage, Purifying Waste Liquors, Colouring, and
the like purposes.
I, IVAN LEVINSTEIN, of Minshull Street, Manchester in the County of Lancaster,
Manufacturing Chemist, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a compound containing persalt of iron, which compound
may be advantageously used for the precipitation of sewage, for the purification of
various waste liquors, in colouring and dyeing, and for other purposes.
In carrying out my invention, I heat in a suitable furnace, suitable bisulphates or
sulphates mixed with oxide of iron. If however a sulphate or sulphates is or are
used, I add a sufficiency of sulphuric acid to convert the sulphate into bisulphate.
For example, I may heat, whilst stirring, a mixture of about equal parts of
bisulphate of soda and of oxide of iron, having by preference previously added
water thereto.
The resulting compound or product may, after cooling, be employed for the
purposes of my invention.
Dated this 20th day of January A.D. 1894.
:
WILLIAM E. HEYS,.
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and connected with Iron Compounds for Use in
Precipitating Sewage, Purifying Waste Liquors, Colouring, and
the like purposes.
I, IVAN LEVINSTEIN, of Minshull Street Manchester in the County of Lancaster,
Chemical Manufacturer, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to a new compound or product containing a persalt of
iron which compound or product may be advantageously used for the precipitation
of sewage, for the purification of various waste liquors, in colouring and dyeing, and
for other purposes.
The substances which I may employ in the production of the new compound
are:-Suitable bisulphates and oxides of iron and, in particular, ferric oxides.
Instead however of using already existing bisulphates, I may use sulphates and add
thereto, before or during the production of the new compound, a sufficient quantity
of sulphuric acid to convert the sulphate into bisulphate. In the following descrip-
tion I use the term "bisulphate," but it will be understood that this is intended to
cover and include sulphates having an additional molecular proportion of sulphuric
acid mixed therewith or added thereto.
In carrying out my invention I mix the bisulphate and the oxide of iron, and
heat the mixture in a suitable furnace, preferably at a temperature of 300° C. or
upwards, until it is perfectly dry, the reaction being facilitated if water be previously
added to or incorporated with the materials.

page_text: Because of its greater abundance, I prefer to employ for the purpose of my
invention, bisulphate of soda, produced by adding the molecular proportion of
sulphuric acid to sulphate of soda, and oxide of iron-ferric oxide-in about equal
parts with an addition of one fourth part of water, but the proportions of either or
both the bisulphate and the water may be considerably increased if desired. The
mixture is heated as hereinbefore described, with stirring, and the resulting com-
pound, may, after cooling, be employed for the purposes above set forth.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. The hereinbefore described process for the manufacture or production of
compounds containing persalts of iron and which consists in heating with stirring
a mixture of oxide of iron with a suitable bisulphate or bisulphates, substantially as
and for the purpose set forth.
2. As a new article of manufacture, a compound containing persalt of iron,
produced as and employable for the purpose herein before described.
Dated this 19th day of September A.D. 1894.
WILLIAM E. HEYS,
Agent for the Applicant.