Process of Treatment of Lead, Tin, Copper, and other Metals or Metallic Alloys with a View to Prepare Oxides in a Pulverulent State.
Year: 1898

page_text: Date of Application, 2nd Dec. 1898
Complete Specification Left, 30th Aug., 1899-Accepted, 30th Sept., 1899
Complete Specification Left, 30th Aug., 1899--Accepted, 30th Sept., 1899
PROVISIONAL SPECIFICATION.
Process of Treatment of Lead, Tin, Copper, and other Metals or
Metallic Alloys with a View to Prepare Oxides in a Pulverulent
State.
I, CAMILLE LEON CHARLES BERTOU, of 9, Rue Riquet, Paris, France, Manu-
facturer, do hereby declare the nature of this invention to be as follows:-
-
This application for patent relates to a process for the treatment of lead, tin,
copper, etc., and of metallic alloys, with a view to prepare oxides in a pulveru-
lent state.
The process consists essentially in making an intimate mixture of the metal
or the alloy, which has previously been reduced to the state of fine powder, with
a quantity of air sufficient to produce the oxidation, to promote the combustion
of this mixture so as to effect the oxidation, and to maintain the fumes thus
produced for a certain time in contact with the air in a highly heated space with
a view if necessary of completing their oxidation.
The combustion of the intimate mixture of metallic powder and air may be
produced either by injecting the mixture on or into an igniting flame, or by
projecting it against a highly heated surface.
The following is an example of a mode of operation which may be employed
in practice for carrying out the process:
The metal or alloy to be oxidised is first reduced to powder by any suitable
mechanical, chemical, or other process, then by means of a fan or blower the
intimate mixture of the powder with the quantity of air desired is effected,
and this mixture is projected against the walls of a retort raised to a red heat.
The mixture ignites and forms a smoke which is composed of the oxide or
oxides completely or nearly completely formed and held in suspension by the
uncombined gases. Owing to the high temperature which is maintained in the
retort, the oxidation is rapidly concluded if it has not been complete during
the combustion of the mixture. It only remains to collect the oxides thus
obtained in a state of fine division.
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0
1
Desember 1898
COMPLETE SPECIFICATION.
Process or Treatment of Lead, Tin, Copper, and other Metals or
Metallic Alloys with a View to Prepare Oxides in a Pulverulent
State.
I, CAMILLE LEON CHARLES BERTOU, of 9, Rue Riquet, Paris, France, Manu-
facturer, do hereby declare the nature of this invention, and in what manner

page_text: the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
This application for patent relates to a process for the treatment of lead, tin,
copper, etc., and of metallic alloys, with a view to prepare oxides in a pulveru-
lent state.
The process consists essentially in making an intimate mixture of the metal
or the alloy, which has previously been reduced to the state of fine powder, with
a quantity of air sufficient to produce the oxidation, to promote the combustion
of this mixture so as to effect the oxidation, and to maintain the fumes thus
produced for a certain time in contact with the air in a highly heated space with
a view if necessary of completing their oxidation.
The combustion of the intimate mixture of metallic powder and air may be
produced either by injecting the mixture on or into an igniting flame, or by
projecting it against a highly heated surface.
The following is an example of a mode of operation which may be employed
in practice for carrying out the process:
The metal or alloy to be oxidised is first reduced to powder by any suitable
mechanical, chemical, or other process, then by means of a fan or blower the
intimate mixture of the powder with the quantity of air desired is effected,
and this mixture is projected against the walls of a retort raised to a red heat.
The mixture ignites and forms a smoke which is composed of the oxide or
oxides completely or nearly completely formed and held in suspension by the
uncombined gases. Owing to the high temperature which is maintained in the
retort, the oxidation is rapidly concluded if it has not been complete during
the combustion of the mixture. It only remains to collect the oxides thus
obtained in a state of fine division.
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. A process of treatment of lead, tin, copper, &c., and of metallic alloys for
the purpose of preparing oxides in the pulverulent state; such process mainly
consisting in thoroughly mixing the metal or alloy, previously reduced to the
condition of a fine powder, with an amount of air sufficient to cause oxidation;
in bringing about the ignition of such mixture so as to effect oxidation, and in
maintaining the fumes thus generated for a certain time in contact with air in
a highly heated chamber, so as to complete (or supplement) oxidation if need be.
2. In the process referred to in the first claim the method of ignition of the
mixture consisting in injecting such mixture on or into the kindling flame.
3. In the process claimed in the first claim the method of ignition of the
mixture consisting in projecting such mixture against a highly heated surface.
Dated this 28th day of August 1899.