Improved Compounds for Filtering and Purifying Liquids.
Year: 1894

page_text: Date of Application, 30th Oct., 1894
Complete Specification Left, 26th July, 1895-Accepted, 7th Sept., 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by ALBERT SCHLUMBERGER, of Montreuil, near
Paris, France, Chemist.]
Improved Compounds for Filtering and Purifying Liquids.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered Patent
Agent, do hereby declare the nature of this invention to be as follows:-
This invention relates to improved filtering and purifying compounds consisting
of a porous body such as pumice, asbestos, porous porcelaine, animal or vegetable
charcoal &c. impregnated with the solution of a metal the oxide of which is
perfectly insoluble and innocuous.
The said oxide may in certain cases be treated with an antiseptic acid which
forms therewith an insoluble antiseptic compound in water.
Thus in impregnating for example a porous body such as those above mentioned,
with the solution of an aluminium salt such as alum or aluminium acetate, and
then transforming the said salt in the porous body into insoluble aluminium
benzoate by simply immersing the body in a solution of a soluble benzoate, such
as benzoate of soda, there is formed a filtering medium encased in an antiseptic
substance which although insoluble and only acting by simple contact, exerts in
the presence of water or other liquid susceptible of change, an antiseptic and
microbicide action.
In a second preparation employed, instead of encasing the porous substances
with an insoluble antiseptic salt as above described, a special oxide is employed
which has the property of giving off a portion of its oxygen in the presence of
soluble or insoluble organic matters so as to render these innocuous; for such oxide
may be employed manganese oxide in the form of manganic hydrate (Mn² O'H³)
which will destroy organic matters suspended in water which may have escaped
the action of the aluminium benzoate.
For preparing the manganic charcoal there is poured upon granular animal
charcoal a boiling solution of permanganate of potash until there is no further
discoloration, which shews that the permanganate has given off to the charcoal
all its manganic oxide, abandoning the potash of its constitution, which is removed
by washing.
Thus for preparing a filter, granular pumice saturated with aluminium benzoate
is placed in a closed cylindrical vessel provided with a perforated double bottom
and having the necessary supply and discharge tubes for the water. A second
similar vessel is charged with manganic charcoal, and the two vessels may be
connected by pipes so that the water or other liquid to be purified after passing
through the first filter is then made to pass through the second.
Either filter may however also be employed separate from the other.
For large installations, the liquid may be first passed through an ordinary
filter-press for the removal of the coarser impurities, and for domestic purposes it
may be first passed through a sponge.
Dated this 30th day of October 1894.
DET 0 TMD AV
BEL & IMI
& IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improved Compounds for Filtering and Purifying Liquids.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered Patent
Agent, 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 :-
This invention relates to improved filtering and purifying compounds consisting
of a porous body such as pumice, asbestos, porous porcelain, animal or vegetable
charcoal &c. impregnated with the solution of a metal the oxide of which is perfectly
insoluble and innocuous.
The said oxide may in certain cases be treated with an antiseptic acid which
forms therewith an antiseptic compound insoluble in water.
Thus in impregnating for example a porous body such as those above mentioned,
with the solution of an aluminium salt such as alum or aluminium acetate, and
then transforming the said salt in the porous body into insoluble aluminium
benzoate by simply immersing the body in a solution of a soluble benzoate, such as
benzoate of soda, there is formed a filtering medium encased in an antiseptic
substance which although insoluble and only acting by simple contact, exerts in
the presence of water or other liquid susceptible of change, an antiseptic and
microbicide action.
In a second preparation employed, instead of encasing the porous substances
with an insoluble antiseptic salt as above described, a special oxide is employed
which has the property of giving off a portion of its oxygen in the presence of
soluble or insoluble organic matters so as to render these innocuous; for such oxide
may be employed manganese oxide in the form of manganic hydrate (Mn³ O₁ H³)
which will destroy organic matters suspended in water which may have escaped the
action of the aluminium benzoate.
For preparing the manganic charcoal there is poured upon granular animal charcoal
a boiling solution of permanganate of potash until there is no further discoloration,
which shews that the permanganate has given off to the charcoal all its manganic
oxide abandoning the potash of its constitution, which is removed by washing.
A second
Thus for preparing a filter, granular pumice saturated with aluminium benzoate
is placed in a closed cylindrical vessel provided with a perforated double bottom
and having the necessary supply and discharge tubes for the water.
similar vessel is charged with the manganic charcoal prepared as above described
and the two vessels may be connected by pipes so that the water or other liquid
to be purified after passing through the first filter is then made to pass through
the second.
-
Either filter may however be employed separate from the other.
For large installations, the liquid may be first passed through au ordinary filter
or filter press for the removal of the coarser impurities, and for domestic purposes
it may be first passed through a sponge or ordinary filter.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:-
A compound for filtering and purifying liquids consisting of porous material
impregnated with the solution of a metal having an innocuous and insoluble oxide
and treated as described.
T1
1002
ABEL & IMRAY,
Agents for the Applicant.