AN IMPROVED MEANS Of PURIFYING GAS FROM AMMONIA
Year: 1871

page_text: LETTERS PATENT to George Eveleigh, of 16, Asylum Road, Peckham,
Consulting Chemist, for the Invention of “AN IMPROVED MEANS Of
PURIFYING GAS FROM AMMONIA."
Sealed the 26th February 1872, and dated the 11th December 1871.
PROVISIONAL SPECIFICATION left by the said George Eveleigh at the
Office of the Commissioners of Patents, with his Petition, on the
11th December 1871.
I, GEORGE EVELEIGH, of 16, Asylum Road, Peckham, Consulting
Chemist, do hereby declare the nature of the said Invention for "AN
IMPROVED MEANS OF PURIFYING GAS FROM AMMONIA," to be as follows:-
My Invention relates especially to the removal of ammonia from gas
manufactured by the processes set forth in the Specifications of Patents
granted to me A.D. 1869, No. 45, and A.D. 1871, No. 413, but is also
applicable for the removal of ammonia from gas manufactured by the
ordinary processes.

page_text: The object of the Invention is to remove the ammonia from the gas
more completely than has been heretofore effected.
In the ordinary method of purifying gas the bulk of the ammonia is
removed by contact with water or ammoniacal liquor, and a portion of
the remainder in the oxide of iron or lime purifiers, but ordinarily as the
gas passes through the last lime purifier a certain portion of the ammonia
is liberated and passes on in a free state along with the gas to the
holders.
In order to obviate this I pass the gas after it has passed the oxide of
iron or lime purifier through another purifier containing a metallic salt,
such as sulphate of iron in crystals, whereby the last particles of
ammonia are chemically removed from the gas before it finally passes
on to the holder.
The ammonia of the gas, combining under these circumstances with
the sulphic acid of the salt, forms a sulphate of ammonia which is
collected by the ordinary well-known chemical means, and is thus
obtained in a highly marketable form, while the ammoniureted metallic
oxide remaining may be employed as a pigment.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Eveleigh in the Great Seal Patent Office on 2
the 11th June 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
EVELEIGH, of 16, Asylum Road, Peckham, Consulting Chemist, send
greeting..
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 2
Letters Patent, bearing date the Eleventh day of December, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said George Eveleigh, Her special
licence that I, the said George Eveleigh, my executors, administrators, 3
and assigns, or such others as I, the said George Eveleigh, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term

page_text: therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ircland, the
Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
MEANS OF PURIFYING GAS FROM AMMONIA," upon the condition (amongst
others) that I, the said George Eveleigh, my executors or administrators,
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 performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.

page_text: By these means the last particles of ammonia are chemically removed
from the gas before it finally passes on to the holder.
The ammonia of the gas combining under these circumstances with
the sulphuric acid of the salt forms a sulphate of ammonia, which is
collected by the ordinary well-known chemical means, and is thus
obtained in a highly marketable form, while the ammoniuretted metallic
oxide remaining may be employed as a pigment.
Having now described the nature of my said Invention, and the
manner in which the same is to or may be performed, I would have it
understood that what I claim as my Invention is the use of a metallic
salt, such as sulphate of iron in crystals, for the removal of ammonia
from gas when applied after the said gas has passed the oxide of iron or
other purifiers, as herein-before described.
In witness whereof, I, the said George Eveliegh, have hereunto set
my hand and seal, this Tenth day of June, One thousand eight
hundred and seventy-two.
GEO. EVELEIGH. (L.S.)