AN IMPROVED METHOD OF TREATING AND UTILIZING SOME OF THE WASTE PRODUCTS RESULTING FROM THE PURIFYING OF GAS IN GAS WORKS
Year: 1870

page_text: LETTERS PATENT to Robert John Everett, of West IIam, in the
County of Essex, for the Invention of "AN IMPROVED METHOD OF
TREATING AND UTILIZING SOME OF THE WASTE PRODUCTS RESULTING FROM
THE PURIFYING OF GAS IN GAS WORKS."
Sealed the Sth October 1870, and dated the 14th April 1870.
PROVISIONAL SPECIFICATION left by the said Robert John Everett at
the Office of the Commissioners of Patents, with his Petition, on
the 11th April 1870.
I, ROBERT JOHN EVERETT, of West Ham, in the County of Essex,
do hereby declare the nature of the said Invention for "AN IMPROVED
METHOD OF TREATING AND UTILIZING SOME OF THE WASTE PRODUCTS RESULTING
FROM THE PURIFYING OF GAS IN Gas Woɛɛs," to be as follows:-
The object of this Invention is to utilize the products at the gas works
which result from the purification of illuminating gas from ammonia.
and sulphuretted hydrogen when sulphate and oxide of iron have been
employed for that purpose. When sulphate of iron mixed with sawdust

page_text: is employed to purify gas from ammonia the refuse consists of sulphate
of ammonia, oxide of iron, sulphur, sawdust, and other matters, and to
extract the sulphate of ammonia therefrom and reconvert the residium
into sulphate of iron again it is proposed to subject the said refuse to
the action of heat in a closed vessel, when the sulphate of ammonia,
being volatile, sublimes over and can be collected while the remaining
iron and sulphur enter into combination with cach other, forming
sulphide of iron, which by exposure to the air can be oxidized into
sulphate of iron (green copperas). Any portion of sulphur existing in
a frco state is also expelled, together with any products which result
from the decomposition of the sawdust, and can be separated from the
sulphate of ammonia by any convenient method. The sulphate of
ammonia being soluble can, if desired, be first separated from the other
ingredients by the action of water, and the green copperas then formed
from the remaining materials as above mentioned. When oxide of iren
and sawdust are employed to purify gas from sulphuretted hydrogen
the product resulting is a mixture of iron, sulphur, and sawdust, and
by treating it in the manner first described the free sulphur can be
expelled from it and the residium converted into sulphate of iron by
oxidization as before stated. If sulphate or oxide of manganese be
employed in the purification of gas the sulphates of ammonia and
manganese can be produced by the above-named process.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert John Everett in the Great Seal Patent
Office on the 14th October 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
JOHN EVERETT, of West Ham, in the County of Essex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourteenth day of April, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Robert John Everett, Her special licence that I,
the said Robert John Everett, my executors, administrators, and assigns,
or such others as I, the said Robert John Everett, my executors,
administrators, and assigns, should at any time agree with, and no

page_text: others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
METHOD OF TREATING AND UTILIZING SOME OP THE WASTE PRODUCTS RESULTING
FROM THE PURIFYING OF GAS IN GAS WORKS," upon the condition (amongst
others) that I, the said Robert John Everett, my exccutors or adminis-
trators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Scal Patent Office
within six calendar months next and immediately after the date of
the said Letters Patent.
NOW KNOW YE, that I, the said Robert John Everett, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say :-
The object of this Invention is to utilize the products at the gas works
which result from the purification of illuminating gas from ammonia
and sulphuretted hydrogen when sulphate and oxide of iron have been
employed for that purpose. When sulphate of iron cither crystallised
or anhydrous mixed with sawdust is employed to purify gas from
ammonia the refuse consists of sulphate of ammonia, oxide of iron,
sulphur, sawdust, and other matters, and to extract the sulphate of
ammonia therefrom and reconvert the residium into sulphate of iron
again it is proposed to subject the said refuse to the action of heat in a
closed vessel, when the salts of ammonia, being volatile, sublime over
and can be collected, while the remaining iron and sulphur enter into
combination with each other, forming sulphide of iron, which by
exposure to the air can be oxidized into sulpate of iron (green copperas).
Any portion of sulphur existing in a free state is also expelled, together
with any products which result from the decomposition of the sawdust
and can be separated from the salts of ammonia by any convenient
method. The sulphate of ammonia being soluble can, if desired, be
first separated from the other ingredients by the action of water, and the
green copperas then formed from the remaining materials as above
mentioned. When oxide of iron and sawdust are employed to purify
gas from sulphuretted hydrogen the product resulting is a mixture of

page_text: iron, sulphur, salts of ammonia, and other matters, and by treating it in
the manner first described the salts of ammonia and free sulphur can be
expelled from it and the residium converted into sulphate of iron by
oxidization as before stated. If sulphate or oxide of manganese be
employed in the purification of gas tho salts of ammonia and manganeso t
can be produced by the above-named process.
Having now fully described and set forth the nature and object of
my said Invention for "An Improved Method of Treating and Utilizing
some of the Waste Products resulting from the Purifying of Gas in Gas
Works," together with the best means I am acquainted with for carrying 1
the same into practical effect, I would remark in conclusion that I
hereby declare my Invention to consist in and I claim the method above
described of treating and utilizing some of the waste products resulting
from the purifying of gas in gas works as above stated.
In witness whereof, I, the said Robert John Everett, have hereunto 1
set my hand and seal, this Fourteenth day of October, in the year
of our Lord One thousand eight hundred and seventy.