Improvement in the Treatment of the Oxide of Iron used for the Absorption of Sulphuretted Hydrogen in the Purification of Illuminating or other Gases, or otherwise.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvement in the Treatment of the Oxide of Iron used for the
Absorption of Sulphuretted Hydrogen in the Purification of
Illuminating or other Gases, or otherwise.
FREDERICK MORGAN MOONEY, Chemical Manufacturer, 74, Rogerson's Quay,
Dublin, do hereby declare the nature of this invention to be as follows:-
The object of the invention is the rendering of the residue from the burning of
the "spent oxide" (i.e. oxide of iron that has been charged with sulphur) available
for being again successfully used for the absorbtion of sulphuretted hydrogen in the
usual way, and thus permitting of the same oxide of iron being used repeatedly
for the absorbtion of sulphuretted hydrogen and burning off of the sulphur derived
therefrom.
To effect this I cause the residue from the burning of the "
spent oxide" to
be drawn from the kilns or burners while still in the heated state, and while still
hot to be immersed in water, allowed to settle, the water drawn off, and the residue
when sufficiently drained, to be intimately mixed by any suitable means with some
fibrous or light organic-matter such as fine peat-mould or saw-dust, or some such
cheap or waste material, in such proportions as may be required to obtain the
proper degree of openness or porosity necessary for the free passage of the gases to
be purified through the mixture in the usual way.
Dated this 23rd day of August 1897.
Improvement in the Treatment of the Oxide of Iron used for the
Absorption of Sulphuretted Hydrogen in the Purification of
Illuminating or other Gases, or otherwise.
I, FREDERICK MORGAN MOONEY, of 74, Rogerson's Quay, Dublin, Chemical
Manufacturer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
دو
This invention relates to improvements in the treatment of the residue from
oxide of iron obtained by the burning off of the sulphur from "spent-oxide
i.e. hydrated oxide of iron or other ferruginous material that has been charged or
saturated with sulphur by the absorption of sulphuretted hydrogen from a mixture
of gases, the object of the invention being to render such residue from the burning
of spent-oxide or the like available for being again successfully used for the
017

page_text: absorption of sulphuretted hydrogen in the usual way, and thus permitting of the
same oxide of iron being used repeatedly for the absorption of sulphuretted
hydrogen, and the absorbed sulphur being recovered and utilized for the manu-
facture of sulphuric acid or for other purposes.
I have found that if this residue from the burning of spent-oxide be exposed for
a sufficient time to the action of water, and then mixed with a suitable proportion
of fibrous organic matter or the like, such a mixture will absorb sulphuretted
hydrogen, if such be passed through it, or be by any other means brought into
contact with it. This result is, however, arrived at much more expeditiously and with
greater certainty by causing the residue from the burning of the spent-oxide to be
drawn from the kilns or burners while in the heated state, and while still hot to be
immersed in water, and allowed to settle down, the excess of supernatent liquor or
water being then drawn or run off, and the residue, when sufficiently drained or
dried by other suitable means intimately mixed through a disintegrator or by any
other suitable means, with some fibrous or light organic matter, such as peat-mould
or sawdust or some such cheap or waste material, in such proportion as may be
required to obtain the proper degree of openness or porosity necessary to allow
of the free passage of the gases to be purified through the mixture in the usual
way.
For the efficient absorption of sulphuretted hydrogen by what is known as
hydrated oxide of iron, it is necessary that the oxide of iron should be thoroughly
saturated or permeated with water, and further that it should be practically free
from free mineral acid. These two requirements are cheaply and expeditiously
satisfied by the method above described for when the burnt oxide is drawn from the
kilns or burners and immersed while hot in water, in the cooling of the hot residue
that immediately ensues, the water is drawn or absorbed into practically all parts
of the particles of the oxide of iron that constitutes the residue, and the excess or
supernatent water that is drawn or run off as before described will be found to
contain a certain amount of free acid that has been washed from the burnt residue.
This free acid if not removed or neutralised would interfere to some extent with the
subsequent absorption of the sulphuretted hydrogen in the usual way, and if any
such free acid remain in the residue after all the excess water has been drained off,
it may, if necessary, be neutralised by sprinkling with weak alkaline liquid.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is -
1. Treating the residue from the burning of "spent-oxide" by saturating the
said residue with water, removing and neutralising any free acid that may exist in
such residue when moistened, and mixing therewith suitable fibrous matter
. whereby the said residue is rendered available for re-use substantially as herein-
before described.
2. Residue from " spent-oxide" treated in the manner and for the purpose
herein described.
1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.