Improved Apparatus for the Expulsion of Chlorine or other Noxious Gases from its Solutions.
Year: 1888

page_text: Improved Apparatus for the Expulsion of Chlorine or other Noxious
Gases from its Solutions.
1, WILLIAM DUNSMORE BOнM of 1 Avenue Road Acton in the County of Middlesex,
Engineer do hereby declare the nature of this invention to be as follows:-
My invention relates to apparatus for the expulsion of chlorine or other gas which
may be offensive to the smell or injurious to the health from a liquid or semi liquid
mass containing the said gas in solution or super-imposed upon its surface, and it is
designed to effect this in a simple and effective manner.
To carry my invention into effect, I introduce air or steam through a perforated
pipe which is caused to dip below the surface of the liquid or semi-liquid containing
the gas in solution or otherwise, and by the escape of the air from the said pipe causes
an agitation therein, which carries off the gas that may be mechanically mixed or
dissolved therein.
In most cases this would be preferably carried out in a closed vessel, so that the
noxious fumes may be removed through a suitable outlet pipe, or may be, if valuable, again
collected by suitable reagents and stored for future use. In this case my perforated
pipe is introduced by means of a suitable stuffing box and packing so as to be gas
tight. My invention is particularly applicable to chlorinisation processes applied to
gold bearing ore where it is found convenient to carry on the chlorinisation of the ore
under considerable pressure, which causes a large volume of the chlorine gas to
remain within the vessel and mechanically mixed with or dissolved in the liquid, and
which is afterwards set free by the treatment or handling of the liquid, and is con-
sequently injurious and offensive to the workman.
My apparatus is particularly adaptable to the chlorinisation process of gold ore
known as the Newbery Vautin treatment since a supply of air to the chlorinisation
vessel forms an essential part of such process, and after discharge of the accumulated
gas within the chlorinisation vessel by its own elasticity a large amount of chlorine is
still found to remain both in the vessel and in the liquid.

page_text: If then a continued influx of air is maintained from the air supply through my
perforated inlet pipe and through the body of the liquid or semi liquid containing the
chlorine in suspension, it is thereby completely discharged through a suitable outlet
pipe, for subsequent collection and treatinent, and the liquid contents are thereby
rendered almost inodorous for further treatment.
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.
.
Improved Apparatus for the Expulsion of Chlorine or other Noxious
Gases from its Solutions.
I, WILLIAM DUNSMORE BOHм, of 51 Avenue Road, Acton, in the County of Middlesex,
Engineer, 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 :-
My invention relates to a process and apparatus for the expulsion of gases which it
is desired to remove or collect for any reason, or which may be for instance offensive
to the smell or injurious to the health, from a liquid or semi-liquid mass containing
the said gas in solution or superimposed upon its surface or otherwise, and it is
designed to effect this in a simple and effective manner.
The accompanying illustrative figure represents a closed chamber in which a liquid
or semi-liquid mass is contained in which is dissolved or upon which is superimposed
a gas which it is desired to remove or such as may be offensive to the smell or injurious
to the health.
A is a chamber which may be of any convenient form or dimensions; B is the
liquid or semi-liquid mass supposed to be impregnated with a noxious or other gas
which will also probably occupy the space above the slime or liquid; C represents any
convenient outlet by which the liquid mass may be removed; D is an outlet valve
which is screwed down until the discharge of the super-imposed gas is desired; E is a
pipe passing down below the liquid or semi-liquid mass and perforated at its
extremity ee below the liquid. If, as may be most usual, the vessel is a closed one and
subjected to any pressure, then a union joint F is made between the pipe E as a
fixture, and the pipe G, by which air or steam is introduced into the chamber. Such
influx of air or steam may be so regulated as to expel any desirable quantity of the
gas or gases. My process is as follows:-
In many trades, noxious gases or gases whose continued presence is objectionable
are generated by the treatment of liquids in consequence of chemical reactions, or in
some cases, liquids are treated with gases which may be offensive, to produce certain
desired chemical reactions, such for instance as in the known gold chlorinisation

page_text: processes, where the semi-liquid pulverised gold bearing ore is treated with chlorine
gas under considerable pressure, to effect the chlorinisation of the gold.
When the chemical process has been completed, and it is desired to remove the
semi-liquid slime which contains the chloride of gold in solution, a large volume of
chlorine gas is evolved from the chamber, and from the semi-liquid mass, under
ordinary circumstances when the chamber is opened, and the semi-liquid mass
discharged, even although the outlet pipe B has first been opened for the discharge of
all chlorine gas that will escape by its own elasticity. To effect the proper and
complete purification of the chamber and the semi-fluid mass, I cause air or steam to
be introduced at some pressure through the pipe G and perforated pipe E, which,
passing through the liquid, agitates the same and disengages whatever gas may be
held in mechanical suspension or solution therein, and further displacing the gases
that may be collected in the space above the liquid B. Should the gas be valuable,
this method of purification of the liquid and expulsion of the gas by air or steam will
enable the said valuable gas to be completely collected for further use, or, should the
gas be merely offensive or injurious, it is thereby completely discharged to a safe
outlet.
My process and apparatus is peculiarly adaptable to the chlorinisation process for
the extraction of gold known as the "Newbery Vautin" system, since a supply of air
under pressure to the chlorinisation vessel, forms an essential part of such process for
the development of pressure above the semi-fluid mass to be treated, and air can thus
readily be applied with sufficient force to effect my purification process and expulsion
of the chlorine. It is obvious, to effect a thorough expulsion of the gas in mechanical
solution in the liquid, the air or steam must be supplied through my pipe E with some
force such as that, in the case of air, which may be obtained from a fan or blower, or
in the case of steam, from a boiler.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The process for the expulsion from a liquid or semi-liquid mass, by atmospheric
air or steam supplied as a blast or jet, of gas held in solution therein or superimposed
in a closed chamber thereon which it may be desired to remove or expel for its noxious
properties, or to completely collect owing to its value.
.
2nd. The apparatus for carrying the said process into effect, consisting of a
perforated pipe E, the perforations of which are below the surface of the liquid or
semi-liquid mass, for the admission of the air supplied as a blast, or steam as a jet,
and an outlet pipe and valve D for the controlled escape of the expelled gas, in
combination with a closed chamber of any suitable form.
Dated this 27th day of December 1888.
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.