The Utilization of a certain Waste Oxide of Iron in the Purification of Sewage and for similar purposes.
Year: 1891

page_text: Date of Application, 20th Oct., 1891
Complete Specification Left, 19th July, 1892-Accepted, 27th Aug., 1892
PROVISIONAL SPECIFICATION.
The Utilization of a certain Waste Oxide of Iron in the Purification
of Sewage and for similar purposes.
We, HOWARD CURTIS SACRÉ of 5 Eccles Old Road Pendleton near Manchester,
Chemical Manufacturer and HARRY GRIMSHAW of 331 Ashton New Road Clayton
Manchester Chemical Manufacturer do hereby declare the nature of this invention
to be as follows:-
In the manufacture of chloride of zinc it is necessary for most uses to purify it
from iron which is generally contained in the solutions of the crude product. This
is in most cases effected by the precipitation of the iron as the hydrated peroxide
otherwise called ferric hydrate, which is removed by subsidence or filtration. The
material thus produced has little or no commercial value. In our invention we
utilize this waste ferric hydrate by the production from it of perchloride or per-
sulphate of iron for use in the purification of sewage & for similar purposes. This
is effected by the solution of the said ferric hydrate in hydrochloric or sulphuric
acid, with or without the application of heat & with or without the previous drying
of the ferric hydrate. The small quantities of zinc, calcium, & other foreign matters
which are generally present in the ferric hydrate do not interfere with the suitability
of the product for the purposes of our invention, but in some cases are an advan-
tage.
Dated this 19th day of October 1801
HOWARD C. SACRÉ.
HARRY GRIMSHAW.
COMPLETE SPECIFICATION.
The Utilization of a certain Waste Oxide of Iron in the Purification
of Sewage and for similar purposes.
We, HOWARD CURTIS SACRÉ of 5, Eccles Old Road, Pendleton, near Manchester
and HARRY GRIMSHAW, Thornton View, 331 Ashton New Road, Clayton,
Manchester 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 :-
In the manufacture of chloride of zinc it is necessary for most uses to purify it
from the iron which is generally contained in the solutions of the crude product.
This is in most cases effected by precipitation of the iron as the hydrated per-
oxide or ferric hydrate, which is removed by subsidence or by filtration. The
material thus produced has little or no commercial value at present.
In our invention we utilize this waste product by the production from it of a
perchloride or persulphate of iron suitable for use in the purification of sewage
and the like, and for use in the purification of coal gas, and for many other purposes
for which iron compounds of this nature are employed.
Our object is effected by dissolving the said waste ferric hydrate in hydrochloric
or sulphuric acid with or without the application of heat, and with or without
previous drying of the ferric hydrate. The resulting salts of iron may be used in
solution as produced or the solution may be concentrated so as to obtain the salts in
the solid form.
The small quantity of zinc, alumina, calcium &c. which is often present with the
ferric hydrate does not interfere with its suitability for the purposes of our
invention.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
The manufacture of perchloride and persulphate of iron from the waste ferric
hydrate of the chloride of zinc manufacture substantially as herein set forth.
Dated this 18th day of July 1892.
HARRY GRIMSHAW.
HOWARD C. SACRÉ.