IMPROVEMENTS IN THE MODE OF EMPLOYING BISULPHIDE OF CARBON OTHER VOLATILE SOLVENTS, AND IN THE MEANS ADOPTED FOR RECOVERING VARIOUS SUBSTANCES OF COMMERCIAL VALUE FROM THEIR SOLUTIONS
Year: 1878

page_text: LETTERS PATENT to Rossall William Papineau, of 39, Lockington Road,
Battersea Park Road, London, in the County of Surrey, for the Invention
of "IMPROVEMENTS IN THE MODE OF EMPLOYING BISULPHIDE OF CARBON
OTHER VOLATILE SOLVENTS, AND IN THE MEANS ADOPTED FOR
RECOVERING VARIOUS SUBSTANCES OF COMMERCIAL VALUE FROM THEIR
SOLUTIONS."
AND
Sealed the 25th February 1879, and dated the 27th August 1878.
PROVISIONAL SPECIFICATION left by the said Rossall William Papineau
at the Office of the Commissioners of Patents on the 27th August 1878.
ROSSALL WILLIAM PAPINEAU, of 39, Lockington Road, Battersea Park Road,
London, in the County of Surrey. "IMPROVEMENTS IN THE MODE OF EMPLOYING
BISULPHIDE OF CARBON AND OTHER VOLATILE SOLVENTS, AND IN THE MEANS
ADOPTED FOR RECOVERING VARIOUS SUBSTANCES OF COMMERCIAL VALUE FROM
THEIR SOLUTIONS."
My Invention relates to a new method of treating various substances by means
of bisulphide of carbon and other volatile solvents, and my improvements consist in
passing by mechanical means the crude material to be treated through the solvent
instead of the usual method of passing the solvent through the crude material. I
thus obtain the desired solution by a continuous process, and I employ similar
mechanical means for collecting sediments and crystals deposited by concentrating
Bolutions.
The apparatus I prefer to employ consists of a screw, made of suitable material
and of any required size, and similar in form to those called "creepers" or
" worm

page_text: conveyors," revolving in a cylinder or pipe, fixed either horizontally or at an angle.
Into this cylinder or pipe the bisulphide or other solvent flows at one end and passes
out at the other, while the revolving screw causes the material to travel the
reverse way.
A similar screw may be applied, if required, to feed the material into the
apparatus.
The screw blades may be solid or perforated, and may or may not fit closely in
the cylinder or pipe, which can be of any convenient shape; or the material may be
mado to travel by other mechanism.
Suitable appliances can be used for keeping the whole or portions of the apparatus
at any required temperature, and when necessary part or the whole of the apparatus
can be immersed in water.

page_text: From the solution passes either directly or through an intermediate collector or
accumulator to the still, which may be an ordinary still, or such as is represented in
Fig. 2, Sheet 2.
Fig. 2 represents an arrangement of apparatus in which sulphur solution is
intended to be treated, as according to its present treatment great difficulty occurs in
consequence of the deposit forming a hard crust upon the inside of the still and
upon the steam coils. In this Fig. 2 it will be seen that the solution is admitted to
the vessel at the lower end by the pipe a', and the vapour as evolved is carried off
to the condenser by pipes b¹.
Steam is admitted as shewn, or the vessel can be double jacketted.
The worm c¹ not only collects to the upper end and discharges into d all the solid
deposit as thrown down, but also agitates the solution and facilitates the operation
of distillation.
In conclusion, I wish it to be understood that I do not confine myself to any
particular form of apparatus to be employed, but what I do claim as now and as of
my Invention is,―
First. A new method of treating various substances by means of bisulphide of
carbon and other volatile solvents, which consist in the passing by mechanical means
the crude material to be treated through the solvent, and I thus obtain the desired
solution by a continuous process.
And, Second. The arrangement and construction of apparatus substantially as
described herein and shewn in the Drawings annexed, to be employed for collecting
sediments and crystals deposited by concentrating solutions.
In witness whereof, I, the said Rossall William Papineau, have hereunto set
my hand and seal, this the Twenty-seventh day of February, in the year of
our Lord One thousand eight hundred and seventy-nine.
Witness to the signature,
THO. WRIGLEY,
75, Chancery Lane,
W.C.
ROSSALL W. PAPINEAU. (L.S.)