Mar. 21.] THE NEW ZEALAND GAZETTE. 739

and serrulations, substantially as described and illustrated.
(2.) In combination, the plate, the raised or embossed letters,
figures, or devices thereon, and the rough or serrulated
surface thereof, all for the purpose set forth, substantially as
described and illustrated.
(Specification, 2s.; drawings, 1s.)

No. 13372.—7th February, 1901.—HANS ALBERT FRASCH,
of Royal Hotel, Hamilton, Ontario, Canada, Chemical En-
gineer. Improved process of recovering and separating
metals from their ores, and concentrates thereof.

Claims.—(1.) In an electrolytic process circulating in-
dependently through one and the same vessel, two elec-
trolytes of different composition independent of and in
contact with each other. (2.) In an electrolytic process,
circulating two different electrolytes, one above and
another below a diaphragm, substantially as described.
(3.) In an electrolytic process, circulating two electrolytes
through one and the same vessel, and regulating the over-
flow of the electrolytes by the difference of their specific
gravities. (4.) The method of regulating the independent
flow of two fluids of different specific gravity which consists
in passing one of the fluids into and through a buoyant body
supported by the other fluid, substantially as described.
(5.) The method of extracting metals from their ores, and
concentrates thereof, and simultaneously producing alkali,
by electrolyzing a solution of a salt of an alkali, such as
sodium-chloride, in the presence of an anode composed of
such ores or concentrates, and thereby forming the corre-
sponding salt of the metal contained in the ores or con-
centrates at the anode, and free alkali at the cathode.
(6.) The method of extracting copper and nickel from matte,
and simultaneously producing alkali, consisting in electro-
lyzing a solution of a salt of an alkali in the presence of an
anode composed of copper-nickel matte, and thereby forming
the corresponding salts of the metals contained in the matte
at the anode, and a solution of alkali at the cathode.
(7.) The method of separating metals from their ores which
consists in providing an electrolytic bath with an anode com-
posed of comminuted ore bearing the metals to be obtained,
and circulating through the body of such anode an electro-
lyte capable of dissolving the metals and simultaneously
electro-depositing from an independent electrolyte on suit-
able cathodes the metals to be separated. (8.) In the pro-
cess of extracting metals from matte or ore by electrolysis,
disintegrating or pulverising the metal-bearing matte or ore
so as to render it freely permeable, distributing such sub-
stance over the bottom of the vessel in which the electrolysis
is conducted, utilising it as an anode, and covering it with a
permeable, granular, chemically inert substance, such as
sand. (9.) The method of extracting metals from metal-
bearing mineral substances and simultaneously producing
alkali, by electrolysis, which consists in electrolyzing a
solution of a salt of an alkali in the presence of an anode
composed of a comminuted mineral substance containing
the metals to be extracted, said anode being covered with a
granular, permeable, chemically inert substance, a cathode
being suspended in the electrolyte, and the electrolyte being
circulated at will below and above the chemically inert sub-
stance. (10.) In the process of extracting metals from
matte or ore by electrolysis, disintegrating or pulverising
the metal-bearing matte or ore so as to render it freely
permeable by the electrolyte, distributing such mass over
the bottom of the vessel in which the electrolysis is con-
ducted, and utilising it as an anode, covering it with a
granular, permeable, chemically inert substance, and cir-
culating an electrolyte capable of combining with the
metals to be extracted through the anode below the inert
substance and in contact with the cathode above the inert
substance. (11.) The method of extracting metals from
their ores or concentrates and simultaneously producing
alkali by electrolysis, which consists in disintegrating or
pulverising the metal-bearing mineral so as to render it
freely permeable by the electrolyte, distributing such mass
over the bottom of the vessel in which the electrolysis is
conducted and utilising it as an anode, covering it with a
granular chemically inert substance permeable by the
electrolyte, and circulating an electrolyte consisting of
a solution of a salt of an alkali through the mass of
the anode below the inert substance and in contact with
the cathode above the inert substance, and electrolyzing
the alkali-salt solution, and thereby producing within the
anode below the inert substance a solution of the corre-
sponding salts of the metals contained in the anode, and a
solution of alkali about the cathode above the inert sub-
stance. (12.) In the process of extracting metals from
matte or ore by electrolysis, and simultaneously producing
alkali, disintegrating or pulverising the metal-bearing matte
or ore so as to render it freely permeable by the electrolyte,
distributing such mass over the bottom of the vessel in which
the electrolysis is conducted and utilising it as an anode,
covering it with a granular, permeable, chemically inert sub-
stance, and circulating an electrolyte capable of combining
with the metals to be extracted through the anode below the
inert substance, and electrolysing a solution of the salt of an
alkali in contact with the cathode above the inert substance.
(13.) The method of exhausting an electrolyte by circulating
the electrolyte in part through the body of a comminuted anode
containing the metals represented in the electrolyte and in
part past a suitable cathode, thereby exhausting the electro-
lyte which passes the cathode, and simultaneously producing
a corresponding quantity of fresh electrolyte within the com-
minuted anode, substantially as described. (14.) In an
electrolytic process, electrolysing in a system of electrolytic
baths one kind of electrolyte in all the baths, sup-
plying different sections of the system of baths with
soluble anodes differing in metallic substance and com-
position, and thereby producing several metallic solu-
tions, each of different composition, and finally ex-
hausting the initial electrolyte. (15.) In an electrolytic
process, electrolyzing several solutions of metallic consti-
tuents differing from each other, in different sections of a
system of electrolytic baths, supplying all the baths with
soluble anodes of one composition, and, while severally de-
positing the metals represented in the different electrolytes
on to the cathodes of the several sections of the system of
baths, producing in all the baths but one and the same kind
of fresh metallic solution. (16.) The method of separating,
by electrolysis, metals from their ores, which consists in
providing an electrolytic bath with an anode composed of
comminuted ore bearing the metals to be obtained, circulat-
ing successively through a series of such anodes an elec-
trolyte capable of dissolving the metals contained therein,
and simultaneously circulating the electrolyte obtained from
the whole series of anodes past the cathodes of one or more
baths, and thereby depositing a selected metal, keeping the
other metals in solution. (17.) The method of recovering
copper, and separating nickel and cobalt from matte or
ore, by electrolysis, which consists in providing a number
of electrolytic baths with anodes composed of the matte or
ore to be treated, electrolyzing the salt of an alkali in the first
of the series of baths, and circulating the metal-bearing elec-
trolyte thereby obtained at the anode successively through
the anodes of all the baths, and circulating the electrolyte
thus finally obtained through the cathode compartments of
any desired number of the series of baths, and electro-
depositing the copper, retaining the nickel and cobalt in
solution. (18.) The method of recovering copper and sepa-
rating nickel, cobalt, and other metals from matte or ore
by electrolysis, which consists in providing a series of elec-
trolytic baths with anodes containing the material to be
treated, electrolyzing the salt of an alkali in a part of the
series of baths, and circulating the metal-bearing electrolyte
thereby obtained at the anodes successively through the
anodes of the other baths next in series, returning the elec-
trolyte to the cathode compartments of these baths and
electro-depositing the copper, then returning the exhausted
electrolyte again to the anode of the first bath, and repass-
ing it successively through the anodes of all the baths and
thereby resaturating the electrolyte and enriching it con-
stantly with nickel, cobalt, and other metals than copper.
(19.) The method of exhausting an electrolyte composed of
the salts of a number of metals, of an individual less
electro-positive metal contained therein, and enriching
the electrolyte with the more electro-positive metals, con-
sisting in passing an electrolyte first through the anodes
of a series of baths containing the metals represented in
the electrolyte, then through the cathodes and deposit-
ing the least positive metal thereon, returning the electro-
lyte to the anode of the first bath in series, and passing it
again through the series of anodes, and thereby constantly
enriching the electrolyte with the more electro-positive
metals. (20.) The method of recovering nickel from
nickel-bearing mineral substances consisting in providing
a series of electrolytic baths with anodes composed of the
comminuted nickel-bearing substance to be treated, electro-
lyzing the salt of an alkali in the first section of the series
of baths, electro-depositing the copper from the electrolyte
thereby obtained in the next section of the series of baths,
removing by suitable means the iron contained in the
electrolyte derived from the whole series of baths after
removal of the copper, and finally depositing the nickel upon
suitable cathodes in the last section of the series of baths,
and constantly producing fresh nickel-bearing electrolyte
from the anodes of the whole series of baths. (21.) In an
electrolytic process in which different kinds of metals are to
be deposited in different baths under the same electric
circuit, connecting serially a sufficient number of electrolytic
baths in multiple to meet the requirements of the indi-
vidual metals and balance the bath in the series which
operates under the highest tension, substantially as de-
scribed.
(Specification, 19s.; drawings, 1s.)