Product for the Purification of Sewage and like Matters.
Year: 1887

page_text: Date of Application, 16th Feb., 1887
Complete Left, 16th Nov., 1887
Complete Accepted, 16th Dec., 1887
Product for the Purification of Sewage and like Matters.
I CHARLES WIGG of Walmer Buildings Water Street, Liverpool, in the county of
Lancaster Manufacturing chemist do hereby declare the nature of this invention to be
as follows:-
The object here is to treat spent copper liquors, which consist mainly of chloride of
iron and sulphate of soda and are obtained in the wet process of extracting copper
from its ores, for the purpose of obtaining a new product and for applying the said
product as a disinfectant and deodorizer of sewage and like matters.
The spent liquors are subjected to the action of milk of lime until the iron is
precipitated in an oxidised condition with sulphate of lime in admixture. The mixture
is subjected to pressure say passed through a filter press care being taken to carry on
the operation at a temperature which will not hasten peroxidation of the iron.
The mixture of peroxide of iron, and sulphate of lime may be added to the sewage
or other matter in the proportion found necessary to purify the latter.
n: 15:1 day of Baku 1887
J. T. KING,
Agent for the Applicant.

page_text: The Treatment of Spent Copper Liquors and the Application of the
Product for the Purification of Sewage and like Matters.
I CHARLES WIGG of Walmer Buildings Water Street Liverpool in the County of
Lancaster, Manufacturing Chemist, 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 :-
The object here is to treat spent copper liquors, which consist mainly of chloride of
iron and sulphate of soda and are obtained in the wet process of extracting copper
from its ores, for the purpose of obtaining a new product and for applying the said
product as a disinfectant and deodoriser of sewage and like matters.
The spent liquors are subjected to the action of milk of lime until the iron is precipi-
tated in an oxidized condition with sulphate of lime in admixture. In practice the
said liquors are run into a tank or vessel and the milk of lime is added gradually
whilst the whole is agitated by beaters or otherwise until the desired precipitation takes
place. The mixture is then run into a filter press or is otherwise subjected to pressure
or treated by subsidence or in any convenient way so as to practically separate the
liquid from the solid constituents, care being taken to carry on the operations at a
temperature which will not hasten peroxidation of the iron, say at a temperature below
100° Fahrenheit.
The mixture of peroxide of iron and sulphate of lime is added to sewage or other
matter in the proportion found necessary to purify the latter. The quantity of the
mixture added will vary according to the composition of the matter to be purified and
will vary within large limits.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is
First. Treating spent copper liquors substantially as set forth to obtain oxidized
iron and sulphate of lime in admixture substantially as set forth.
Second. Treating spent copper liquors with milk of lime and applying the product,
substantially in the manner and for the purpose set forth.
Dated thin 15th day of Novemba 1007
Per pro J. T. KING,
James Johnson.