IMPROVEMENTS IN THE SEPARATION OF THE TIN FROM THE IRON IN TIN SHEET CLIPPINGS, OR WHAT IS KNOWN AS TINNERS' WASTE, AND UTILIZATION OF TIN CLIPPINGS OR TINNERS' WASTE FOR MANUFACTURING MARKETABLE IRON, PIG TIN, AND THE VARIOUS TIN. COMPOUNDS
Year: 1871

page_text: County of New York, and State of NCW 10rk, in the United States
of America, for the Invention of "IMPROVEMENTS IN THE SEPARATION OF
THE TIN FROM THE IRON IN TIN SHEET CLIPPINGS, OR WHAT IS KNOWN AS
TINNERS' WASTE, AND UTILIZATION OF TIN CLIPPINGS OR TINNERS' WASTE
FOR MANUFACTURING MARKETABLE IRON, PIG TIN, AND THE VARIOUS TIN.
COMPOUNDS."
Scaled the 7th July 1871, and dated the 4th April 1871.
COMPLETE SPECIFICATION filed by the said Adolph Ott at the Office
of the Commissioners of Patents, with his Petition and Declaration,
on the 4th April 1871, pursuant to the 9th Section of the Patent
Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ADOLPH
OTT, of the City of New York, in the County of New York, and
State of New York, in the United States of America, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN THE SEPARATION OF THE TIN FROM THE IRON IN TIN SHEET CLIPPINGS, OR WHAT
IS KNOWN AS TINNERS' WASTE, AND UTILIZATION OF TIN CLIPPINGS OR TINNERS'
WASTE FOR MANUFACTURING MARKETABLE IRON, PIG TIN, AND THE VARIOUS TIN

page_text: COMPOUNDS," and have petitioned Her Majesty to grant unto me, my
executors, administrators, and assigns, Her Royal Letters Patent for
the same, and have made solemn Declaration that I am the true and
first Inventor thereof.
NOW KNOW YE, that I, the said Adolph Ott, do hereby declare that
the following Complete Specification, under my hand and scal, fully
describes and ascertains the nature of the said Invention, and in
what manner the same is to be performed, in and by the following
statement:-
This Invention relates to an improvement in the separation of the tin
from the iron in tin clippings, or what is known as tinners' waste, and
utilizing of tin clippings, or what is known as tinuers' waste for the
manufacture of marketable iron, pig tin, and the various tin compounds.
This I do as follows:-By employing a chemical agent consisting of
muriatic or hydrochloric acid, by which not only the superficial layer of
tin but also the alloy of tin and iron underneath is removed, the iron
is treated so that it will remain clean and bright if kept from dampness,
and I produce at once pure tin salts (free from iron) from the solution
of tin obtained by such chemical treatment.
In carrying out my Invention 1 take tin clippings of the same grade
of plate, cut of the corners or separate the clippings so that the acid
will take effect, and place them in a crib or circular receptacle of wood
surrounded by a gauze of copper wire to prevent the clippings from
falling out. This crib is immersed into a vat or bath containing
muriatic or hydrochloric acid of half the strength of the commercial
fuming acid or 12 degrees Baumé, in which it is made to perform a slow
rotary motion.
This bath is heated to about 150 degrees Fahrenheit
by the introduction of steam. When the superficial deposit of the
tin is taken off, which will have taken place in from twelve to twenty
minutes, according to the strength of the bath, the degree of heat, and
the thickness of the plate. The crib, which is connected with a tramway
above the val, is lifted out of the vat by means of a hoisting apparatus,
and after the acid has dripped off it is removed into another vat in
like manner heated by steam containing muriatic acid of one-third
or one-fourth the strength of commercial fuming acid. In this bath
the alloy of tin and iron is removed, whereby the iron is left in a
perfectly pure condition. From this vat the crib with its contents is
removed into a third vat also heated by steam in manner described

page_text: containing a slightly alkaline solution consisting of lime, soda, or
potash or other alkali of from three to ten per cent. In order to neutralize
the acid after having rotated for fifteen or twenty minutes in this third
bath or vat it is removed into a fourth vat filled with water alone,
and it is made to rotate herein more rapidly so that the film of the
hydrated oxides of tin and iron formed by the action of the alkaline
solution upon the chlorides of tin and iron adhering to the scraps is
removed by the friction produced by the water on the scraps. From
this fourth vat the crib is removed into a tightly-fitting wrought-iron
box through which air from 300 to 400 degrees Fahrenheit, or the gases
resulting from the combustion of fuel are blown. After a few minutes
the scraps are perfectly dry, the crib is removed, discharged, charged
anew, and the process repeated. The liquors in the vats are employed
until they will act no more, when they are replaced by fresh ones. The
liquor in the first vat if proper care has been taken contains only the
tin and no iron, and I have the iron perfectly separated from the tin.
If it be desired to use the scrap iron to produce bar or sheet iron it
may be done by compressing it in a hollow cylinder of cast iron until
forming a compact mass, then dipping the mass into soluble glass or
silicate of soda, and after the immersion welding it in the ordinary
manner.
I use the liquors in the several vats as follows :- If it be desired to
convert the chloride of tin into pure crystals of tin the solution in the
first bath or vat is drawn off, filtered, and evaporated in a copper or other
proper vessel to 20 degrees Baumé, when the solution is drawn off into
smaller earthen or other proper vessels where it is left to cool and
crystalize.
If it be desired to produce metallic tin the solution is drawn off into
a wooden or other vat and an oxide or carbonate of the carthy metals
is added, such as soda, limestone, or carbonate of barytes, and a
precipitate is produced which is collected, deprived of its water, and
reduced by glowing with charcoal in a proper furnace.
If it be desired to produce the stannates of soda or stannate of potash
I take the precipitate, wash it well with water until it is deprived of
the chlorides of such alkalies or earthy metals as have been used. I
thus get the pure oxide of tin which I dissolve in a boiling solution
of soda or potash. Then in evaporating such solution to dryness I
obtain either the stannate of soda or stannate of potash.

page_text: I intend to use these stannates for woollen, cotton, or linen mordants,
for which purpose they are so far preferable to other mordants as they
produce brighter colors. In the second bath or vat I have a solution
consisting principally of chloride of iron from which I may produce any
iron salt in the ordinary manner. The hydrated oxides of tin and iron
resulting in the fourth bath or vat after being dried and heated so as to
drive off the water form an excellent polishing powder.
Having thus described the nature of my said Invention and in what
manner the same may be performed, I wish it to be distinctly understood
that I do not limit myself to any proportions of materials before given
or to the duration of the operations, for the same may be varied without
departing from this Invention; but what I claim is,-
First. I claim as my Invention the use of muriatic or hydrochloric
acid in combination with steam and mechanical friction, and the
subsequent employment of alkaline solutions, substantially as above 1
described, for the separation of the tin from the iron in tin sheet
clippings or tin plate.
Second. I claim the use of the scrap iron in tin sheet clippings for
the production of bar iron, substantially as above described.
Third. I claim the process substantially as above described for the 2
production of tin crystals, metallic tin, and the various tin compounds
from tin sheet clippings.
Fourth. I claim the production of polishing powder of the hydrated
oxides of iron from tin sheet clipping, substantially as above described.
Fifth. I claim the combination of the various means for the separation 2
of tin from iron in tin sheet clippings, and the production of bar iron,
tin, and the various tin compounds, substantially as above described.
In witness whereof, I hereunto set my hand and scal, and dated
this 16th day of March, A.D. 1871.
Witnesses,
JAMES M. BALL,
J. A. BEALL.
ADOLPHI OTT. (L.S.). 3