Year: 1887

page_text: J. A. BERESFORD BENNETT.

page_text: Improvements in the Method of Recording Tin from Tin Scrap and
similar Substances.
I, JAMES ALFRED BERESFORD BENNETT of Llyndale Valentine Road King's Heath
in the County of Worcester Analytical Chemist 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 :-
My invention has for its object the recovery of the tin upon tinned iron and in
order to carry out my invention I make a bath of nitrates or chlorates or these com-
bined in varying proportions according to the nature of the scrap to be treated and
the product which I desire to obtain. In order to make clear the method of working
I will give a particular example. Supposing I wish to obtain the tin in the form of
tin oxide I use a bath made by fusing chili saltpetre-this being a cheap form of
nitrate and when the chili saltpetre is a little hotter than its fusing point I introduce
the tinned iron whereupon the tin is oxidised and mostly sinks to the bottom of the
bath and can be removed from time to time & smelted in the ordinary manner.
The oxidising of the tin can be effected by means of chlorates as well as nitrates.
I do not confine myself to the nitrate or chlorate of sodium but give the above as
ready methods of carrying out my invention.
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
I. The oxidation of the tin upon tinned iron-without materially affecting the
iron by means of a bath of fused nitrate or chlorate substantially as above
described.

page_text: Date of Application, 20th July, 1887
Complete Left, 22nd May, 1888
Complete Accepted, 22nd June, 1888
Improvements in the Method of Recovering Tin from Tin Scrap and
similar Substances.
I, JAMES ALFRED BERESFORD BENNETT of Valentine Road King's Heath in the
County of Worcester, Analytical Chemist do hereby declare the nature of this inven-
tion to be as follows:-
In order to carry out my invention I make a bath of Hydrates and Nitrates or
Chlorates in suitable proportions, but preferably of sodium hydrate and sodium nitrate
by fusing these substances, and when the mixture is in a liquid condition I introduce
a quantity of the tin scrap and allow it to remain in the bath until the tin has entered
into combination with the salts in the bath. I then remove the scrap iron, upon
which there usually remains a coating of tin salts and introduce it into a vat con-
taining water preferably acidulated with hydrochloric acid by which means the scrap
iron is more completely cleaned and rendered fit for use.
The tin in the bath may
then be used as "6
preparing salts" or in any other way desired.
J. A. BERESFORD BENNETT.

page_text: COMPLETE SPECIFICATION.
Improvements in the Method of Recovering Tin from Tin Scrap and
similar Substances.
I, JAMES ALFRED BERESFORD BENNETT of Llyndale Valentine Road King's Heath
in the County of Worcester Analytical Chemist 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 :-
I
My invention has for its object the recovery of the tin upon tinned iron and in
order to carry out my invention I make a bath of hydrates nitrates or chlorates or
these combined in varying proportions according to the nature of the scrap to be
treated and the product which I desire to obtain. In order to make clear the method
of working I will give a particular example. Supposing I wish to obtain the tin in
the form of tin oxide I use a bath made by fusing chili saltpetre-this being a cheap
form of nitrate and when the chili saltpetre is a little hotter than its fusing point
introduce the tinned iron whereupon the tin is oxidised and mostly sinks to the bottom
of the bath and can be removed from time to time & smelted in the ordinary manner.
If however I desire to make stannates commonly known as preparing salts I add to
the bath sodic hydrate-as being a cheap form of hydrate-and when the bath of
mixed hydrate and nitrate is fused I introduce the tinned iron when the nitrate as
before oxidises the tin and the hydrate dissolves or unites with the oxide forming as
is well known stannates.
The oxidising of the tin can be effected by means of chlorates as well as nitrates.
I do not confine myself to the hydrate nitrate or chlorate of sodium but give the
above as ready methods of carrying out my invention.
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
I. The oxidation of the tin upon tinned iron-without materially affecting the
iron by means of a bath of fused nitrate or chlorate substantially as above
described.
D1
C
1000