IMPROVEMENTS IN TREATING BURNT RESIDUE FROM SPENT OXIDE OF IRON TO BE USED OR EMPLOYED IN PURIFYING COAL GAS
Year: 1879

page_text: LETTERS PATENT to Samuel Hallsworth, of Armley, near Leeds, and Richard
Bailes, of Woodhouse Carr, near Leeds, both in the County of York, for the
Invention of "IMPROVEMENTS IN TREATING BURNT RESIDUE FROM SPENT
OXIDE OF IRON TO BE USED OR EMPLOYED IN PURIFYING COAL GAS."
Sealed the 30th December 1879, and dated the 3rd July 1879.
PROVISIONAL SPECIFICATION left by the said Samuel Hallsworth and
Richard Bailes at the Office of the Commissioners of Patents on the 3rd July.
1879.
"
SAMUEL HALLSWORTH, of Armley, near Leeds, and RICHARD BAILES, of Wood-
house Carr, near Leeds, both in the County of York. IMPROVEMENTS IN TREATING
BURNT RESIDUE FROM SPENT OXIDE OF IRON TO BE USED OR EMPLOYED IN
PURIFYING COAL GAS."
Our Invention refers to the treatment of the burnt residue, such residue being
produced when spent oxide of iron is employed in the manufacture of sulphuric
acid, and in re-using the saine after treatment for purifying coal gas, all substantially
as hereafter described.
We take about three wheel barrowfuls of the above named burnt residue in a
dry state, and mix it with about one wheel barrowful of dry sawdust; we then add
and well mix ammoniacal liquor or liquid ammonia, or of the strong washings of
sulphate of ammonia from spent oxide or other alkaline solution, to moisten the
mass, so as to ball together when pressed in the hand, only slightly wetting it. Of
the above named liquors and solutions we prefer to use the ammoniacal liquor
commonly called gas water.
A quantity of fifty or one hundred tons of material may be prepared in the
manner above stated, and put on a heap under cover, and allowed to remain for a
few weeks or longer if desirable. The material may then be used in purifying coal
gas from sulphurated hydrogen in the ordinary manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel Hallsworth and Richard Bailes in the Great Seal Patent Office
on the 3rd January 1880.
SAMUEL HALLSWORTH, of Armley, near Leeds, and RICHARD BAILES, of Wood-
_house_Carr, near Leeds, both in the County_of_York. "IMPROVEMENTS IN TREATING
BURNT RESIDUE FROM SPENT OXIDE OF IRON TO BE USED OR EMPLOYED IN
PURIFYING COAL GAS."
Our Invention refers to the treatment of the burnt residue being produced when
spent oxide of iron is employed in the manufacture of sulphuric acid, and in
reusing the same after treatment for purifying coal gas, all substantially as hereafter
described.
We take about three wheel barrowfuls of the above named burnt residue in a dry
state, and mix it with about one wheel barrowful of dry sawdust; we then add and
well mix ammoniacal liquor or liquid ammonia, or other alkaline solution, or of the
strong washings of sulphate of ammonia from spent oxide to moisten the mass, so
as to ball together when pressed in the hand, only slightly wetting it. Of the
above named liquors and solutions we prefer to use ammoniacal liquor commonly
called gas water. When gas liquor is employed care should be taken to have it as
free as possible from tarry matter.
A quantity of fifty or one hundred tons of material may be prepared in the
manner above stated, and put on a heap under cover, and allowed to remain for a
few weeks or longer if desirable. The material may then be used in purifying coal
gas from sulphureted hydrogen in the ordinary manner.
Having now described the nature of our said Invention, we would here remark
that the ingredients named may be varied in their quantities without in any way
departing from the nature of our Invention, but what we do claim and désire to be
secured to us by Letters Patent is,―
The use of the above named ingredients in the preparation of the burnt residue
from spent oxide of iron, substantially as and for the purposes herein set forth.
In witness whereof, I, the said Samuel Hallsworth, for myself and on behalf
of the said Richard Bailes, have hereunto set my hand and seal, this Thirty-
first day of December, in the year of our Lord One thousand eight hundred
and seventy nine.
SAMUEL HALLSWORTH. (L.S.)