IMPROVEMENTS IN EXTRACTING OR RECOVERING PRUSSIATE OF POTASH, AMMONIA, TAR, AND GAS FROM NITROGENOUS SUBSTANCES
Year: 1880

page_text: LETTERS PATENT to Walter Brierley, of Halifax, in the County of York, and
Blackburn, in the County of Lancaster, Patent Agent, for an Invention of
"IMPROVEMENTS IN EXTRACTING OR RECOVERING PRUSSIATE OF POTASH,
AMMONIA, TAR, AND GAS FROM NITROGENOUS SUBSTANCES." A communica-
tion from abroad by Theodor Richters, of Breslau, in the Kingdom of Prussia,
Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Walter Brierley at the Office
of the Commissioners of Patents on the 27th September 1880.
WALTER BRIERLEY, of Halifax, in the County of York, and Blackburn, in
the County of Lancaster, Patent Agent. "IMPROVEMENTS IN EXTRACTING OR
RECOVERING PRUSSIATE OF POTASH, AMMONIA, TAR, AND GAS FROM NITRO-
GENOUS SUBSTANCES." A communication from abroad by Theodor Richters, of
Breslau, in the Kingdom of Prussia, Empire of Germany.
The object of my Invention is to obtain or extract prussiate of potash, ammonia,
tar, and gas from all kinds of nitrogenous substances by means of carbonate of
potassium; and to this end I mix the substances with carbonate of potassium,
which at the end of the process every time will be recovered.
To carry my
Invention into effect I moisten the azotized substances, viz., old leather, fresh or
dried blood, horn, hair, feathers, fur, felt, or cloth, &c. with a solution of carbonate
of potassium, and then dry them on a kiln: The kiln must be constructed so that
carbonic acid comes in contact with the substances to be dried, or the solution of
carbonate of potassium can be made free of caustic potash before the moistening
of the substances by introducing carbonic acid.
When the substances are very
sandy, it is necessary to remove the sand by washing with lye of potash before
drying. The well-dried substances are then transformed in gas in convenient
apparatus; their fusion is not necessary.
'

page_text: The escaping ammonia, gas, and tar are collected in the well known manner.
The residuum in the retort contains cyanide of potassium, hydrocyanide of
potassium, sulpho-cyanide of potassium, sulphuret of potassium, caustic potash, and
carbon.
By lixiviating and boiling with metallic and iron or peroxide of iron the cyanide
of potassium is changed into prussiate of potash and caustic potash. The solution
then is evaporated, and the prussiate of potash separated therefrom in a convenient
manner. The remaining lye contains principally carbonate of potash and caustic
potash, and is used again for moistening other nitrogenous substances. The
caustic potash is transformed into carbonate of potash during the drying
manipulation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Walter Brierley in the Great Seal Patent Office on the 25th
March 1881.
WALTER BRIERLEY, of Halifax, in the County of York, and Blackburn, in
the County of Lancaster, Patent Agent. "IMPROVEMENTS IN EXTRACTING OR
SEPARATING PRUSSIATE OF POTASH, AMMONIA, TAR, AND GAS FROM NITRO-
GENOUS SUBSTANCES. A communication from abroad by Theodor Richters, of
Breslau, in the Kingdom of Prussia, German Empire.
دو
The object of my Invention is to obtain or extract prussiate of potash, ammonia,
tar, and gas from all kinds of nitrogenous substances by means of carbonate of
potassium, and to this end I mix the substances with carbonate of potassium, which
at the end of the process every time will be recovered.
To carry the Invention into effect, I moisten the azotized substances, namely, old
leather, fresh or dried blood, horn, hair, feathers, fur, felt, or cloth, etc., with a
solution of carbonate of potassium, and then dry them on a kiln.
The kiln must be constructed so that carbonic acid comes in contact with the
substances to be dried, or the solution of carbonate of potassium can be made free
of caustic potash before the moistening of the substances by introducing carbonic
acid. When the substances are very sandy, it is necessary to remove the sand by
washing with lye of potash before the drying. The well dried substances are then
transformed in gas in convenient apparatus; their fusion is not necessary.
The escaping aminonia, gas, and tar are collected in the well known manner.
The residuum in the retorts contains cyanide of potassium, hydrocyanate of
potassium, sulpho cyanide of potassium, carbonate of potassium, sulphuret of
potassium, caustic potash, and carbon.
By lixiviating and boiling with metallic iron or perioxide of iron, the cyanide of
potassium is changed in prussiate of potash and caustic potash. The solution then
is evaporated, and the prussiate of potash separated therefrom in a convenient
manner. The resting lie contains principally carbonate of potash and caustic
potash, and is used again for moistening the nitrogenous substances; the caustic
potash is transformed in carbonate of potash during the drying manipulation.
Having thus fully described the nature of the Invention, what I desire to claim
and secure by Letters Patent is,-
Firstly. The process of gaining prussiate of potash, ammonia, gas, and tar from
nitrogenous substances which are moistened, with a solution of carbonate of potash
or with one which contains carbonate of potash, caustic potash, sulpho-cyanide, and
cyanide of potash, &c., and then dried in presence of carbonic acid; by gasification.
the so prepared substances are transformed in prussiate of potash, ammonia, tar,
and gas without fusion of the substances.
Secondly. The separation of sand from the nitrogenous substances by washing
them in a solution of carbonate of potassium.
In witness whereof, I, the said Walter Brierley, have hereunto set my hand
and seal, this Twenty third day of March, in the year of our Lord One
thousand eight hundred and eighty one.
WALTER BRIERLEY. (L.S.)