Improvements in the Manufacture of Caustic Alkalles.
Year: 1891

page_text: Date of Application, 27th Oct., 1891
Complete Specification Left, 26th Aug., 1892-Accepted. 22nd Oct: 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Caustic Alkalles.
I, JOSEPH ELTON BOTT, of Brinnington Hall, Stockport, in the County of
Chester, Engineer, do hereby declare the nature of this invention to be as
follows:-
The invention has for its object improvements in the manufacture of caustic
alkalies, and relates to means for evaporating or concentrating the lye. For this
purpose 1 place the lye to be concentrated in a vessel or container provided with
tuyeres, through which currents of heated air are passed, which, by passing through
the lye, quickly evaporate and concentrate the same. In some cases, in lieu of, or
in addition to, passing heated air through the lye, I pass carbonic acid or other gas,
which in some cases may be heated, through the same, to produce any required
chemical change or combination.
The heated products passing off from the lye treated as above described, are
used for the purpose of heating lye for subsequent treatment as above described.
Dated this 27th day of October 1891
J. ELTON BOTT,
By Harris, & Mills,
23, Southampton Buildings, London, W.C., Agent's.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Caustic Alkalies.
I, JOSEPH ELTON BOTT, of Brinnington Hall, Stockport, in the County of
Chester, 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
it and by the following statement :-
The invention has for its object improvements in the manufacture of caustic
alkalies, and relates to means for evaporating or concentrating the lye.
For this purpose I place the lye to be concentrated in a vessel or container
provided with tuyeres, through which currents of heated air are passed, which, by
passing through the lye, quickly evaporate and concentrate the same. In some
cases in lieu of; or in addition to, passing heated air through the lye, I pass carbonic
acid
gas, which, in some cases, may be heated, through the same to produce the
required chemical change or combination.
The heated products passing off from the lye treated as above described are
used for the purpose of heating lye for subsequent treatment as above set forth.
And in order that my said invention may be more clearly understood and
readily carried into effect, I will proceed, aided by the accompanying drawings,
more fully to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure is a side elevation of apparatus such as I employ in carrying my
invention into effect..
Figure 2 is a vertical section drawn on the line X-x of Figure 1, and
Figure 3 is, a sectional plan drawn on the line Z-Z of Figure 2.
In all the figures like parts are indicated by similar letters of reference.
"
The apparatus consists of an evaporating vessel A, the base plate B of which is
perforated to receive the vertical perforated tubes D D, the lower ends of which
communicate with the air chamber C, which acts as a reservoir for the hot air
ריל ם-Ah

page_text: conveyed under pressure through the pipe E, trunnion G and hollow standard F from
the furnace in which the air is heated. The spherical valve H acts as a safety valve
for the release of accumulated pressure; the cover I merely serves to close the
trunnion G externally. M M are openings, closed by valves, in the bottom of the
chamber C to give access to the tubes D D.
The top plate N rests on the vessel A and is secured, as shown, by the
clamps RR R, and can be raised by the lifting rings QQ when the said clamps
are released. O is the inlet for the lye; this closed by a spherical safety valve P,
which is capable of being removed for the purpose of running in the lye.
An internal outlet passage J conveys the hot air and steam away from the
vessel A through the hollow trunnion K, which also forms one of the trunnions on
'which the vessel A oscillates.
The trunnions G and K of the vessel A are carried by, and are capable of
turning in, the standards F and L.
The manner in which I carry my invention into operation is as follows.
Air under pressure is heated in a suitable heating apparatus and is then passed
through the standard F, trunnion G and pipe E into the receiver C, whence it
passes into the vessel A through the perforated pipes D.
The vessel A is supported by its trunnions G and K in a vertical position, and
the cover N secured thereto by the clamps R R R; the lye to be concentrated is
admitted thereto through the inlet and is prevented from entering the air
chamber C and perforated pipes D owing to the pressure of the heated air being
sufficient to counterbalance the weight of the lye to be treated.
Evaporation immediately commences and the inlet O is closed by the safety
valve P.
During concentration of the lye by evaporation, the combined air and steam
passes off through the passage J and trunnion K, whence it goes to waste, or may
preferably be used for heating the lye to be placed in the vessel A, to be treated as
above described.
As soon as the lye in the vessel A has been sufficiently treated, the safety
valves H and P are secured in position by any suitable means, and the vessel A
tilted over on its trunnions, when, on stopping the admission of the heated air, the
cover N is removed and the concentrated or precipitated alkali emptied out of the
vessel A into any suitable receiver for future treatment.
In some cases in lieu of, or in addition to, passing heated air through the lye, I
pass carbonic acid gas, which in some cases may be heated to produce the required
chemical carbonization of the soda.
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 :-
1. In the manufacture of caustic alkalies, the process or method of evaporating
and concentrating lye by the direct contact therewith of streams of hot air under
pressure and at a suitable temperature, substantially as and for the purpose
specified.
2. In the manufacture of caustic alkalies, the process or method of treating lye
by the direct contact therewith of streams of carbonic acid gas in lieu of, or in
combination with, streams of hot air as referred to Claim 1.
3. In the manufacture of caustic alkalies, the combination of evaporating vessel A
with its connected parts, substantially as herein shown and described, and the use
thereof in the treatment of lye, substantially as herein shown and described.
Dated this 20th day of August 1892.
*7001 asnim to len waaz OTTO
J. ELTON BOTT,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents,