Improvements in the Manufacture of Chlorine.
Year: 1890

page_text: Date of Application, 4th Dec., 1890
Complete Specification Left, 30th Sept., 1891-Accepted, 31st Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Chlorine.
I JAMES SIMPSON of 84 Rumford Place Liverpool in the County of Lancaster
Alkali Manufacturer do hereby declare the nature of this invention to be as
follows:-
The object of my invention is in a cheap and efficient manner to produce or
obtain chlorine in a condition suitable for the manufacture of bleaching powder,
chlorate of potash or any other chlorine compounds.
It is well known that in the ordinary salt cake process-the hydrochloric acid
which is evolved is mixed to a large extent with atmospheric nitrogen-the
presence of which is very prejudicial in the Deacon chlorine process as the
action of the sulphate of copper is greatly retarded by the presence of this
inert gas.
When chloride of sodium is decomposed by means of phosphoric acid at a high
temperature say at a red heat-phosphate of soda is formed and hydrochloric acid
is evolved. If the operation be conducted in a muffle the hydrochloric acid which is
evolved is practically free from nitrogen and will work much better in the
Deacon decomposer than the gas from the ordinary salt cake process. In practice
I preferably conduct the fusion of the chloride of sodium and phosphoric acid
in a bath lined with silica bricks or silica cement fitted with a crown of similar
material placed as close as possible to the charge under treatment-the heat being
applied from above. The molten charge is tapped and withdrawn from time to time
as required.
As an alternative method for obtaining chlorine from the hydrochloric acid
produced as above, instead of employing the Deacon or Weldon processes for the
manufacture of bleaching powder, I conduct the hydrochloric acid gas through a
heated chamber filled with marbles (preferably glazed) together with a sufficient
quantity of oxygen to convert the hydrogen in the acid into water-liberating the
chlorine and realizing the equation 2 HCl + 0 = H₂O + 2 Cl.
The oxygen for this operation may be produced by any known means-but
preferably by the method known as Brin's process.
Dated the Third day of December 1890.
Per pro J. T. KING,
J. Johnson,
Agent.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Chlorine.
I JAMES SIMPSON of 8 Rumford Place Liverpool in the County of Lancaster
Alkali 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 :-
The object of my invention is in a cheap and efficient manner to produce or
obtain chlorine in a condition suitable for the manufacture of bleaching powder,
chlorate of potash, or any other chlorine compounds.
It is well known that in the ordinary salt cake process the hydrochloric acid
which is evolved is mixed to a large extent with atmospheric nitrogen the presence
of which is very prejudicial in the Deacon chlorine process as the action of the
sulphate of copper is greatly retarded by the presence of this inert gas.
Price 4.1

page_text: When chloride of sodium is decomposed by means of phosphoric acid at a high
temperature say at a red heat-as set forth in my Complete Specification
No. 18833 of 1890, phosphate of soda is formed and hydrochloric acid is evolved.
If the operation be conducted in a muffle-the hydrochloric acid which is evolved
is practically free from nitrogen and will work much better in the Deacon
decomposer for the production of chlorine than the gas from the ordinary salt cake
process. In practice I preferably conduct the fusion of the chloride of sodium and
phosphoric acid in a cast iron bath fitted with a crown of similar material placed
as close as possible to the charge under treatment the heat being mostly applied
from above. The molten charge of phosphate of soda is tapped and withdrawn
from time to time as required and run on a cooling plate or it may be run into
water or a solution of caustic soda.
As an alternative method for obtaining chlorine from the hydrochloric acid
produced as above instead of employing the Deacon or the Weldon processes as at
present worked for the manufacture of bleaching powder, I conduct hydrochloric
acid gas produced as described in the Specification to my British Letters Patent
No. 18835 of the year 1890 through a heated chamber filled with marbles
(preferably glazed) together with a sufficient quantity of oxygen to combine with
the hydrogen in the acid and form water-liberating the chlorine and realizing the
equation 2 HCI + 0 = H₂O + 2 Cl. The oxygen for this operation may be
produced by any known means, but preferably by the method known as Brin's
process.
Instead of glazed marbles, unglazed marbles may be used.
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:
The process herein described consisting in the employment of oxygen practically
free from nitrogen for liberating the chlorine of the hydrochloric acid (produced by
decomposing common salt with phosphoric acid) from the hydrogen with formation
Per pro J. T. KING,
J Johnson,
Agent.