Alkali Process.
Year: 1887

page_text: Date of Application, 23rd July, 1887
Complete Left, 21st Apr., 1888
Complete Accepted, 23rd July, 1888
Alkali Process.
I CHARLES WIGG of Walmer Buildings, Liverpool, in the county of Lancaster,
Alkali Manufacturer do hereby declare the nature of this invention to be as
follows:-
:-
In the treatment of chloride liquors left after the extraxtion of bicarbonate of soda
in the ammonia alkali process for the purpose of obtaining ammonia and carbonic
acid gas:
The free alkali has been neutralized with hydrochloric acid which is
troublesome to work with and not only very quickly destroys the plant used but also
imports iron into the chloride liquors which afterwards discolours the muriate of
ammonia produced, it further causes loss of carbonic acid and oftentimes also of
ammonia by effervescence and frothing.
Now the object of my invention is to obviate the above objections and to so treat
the chloride liquors that ammonia and carbonic acid may be obtained therefrom
without loss and injury from the above causes.
The invention consists essentially in first neutralizing the free alkali contained in
the liquors by the addition thereto of chloride of calcium thereby forming calcium
carbonate which is afterwards separated out and used in the distillation of the said
liquors, or as may be otherwise found advantageous.
The neutralized liquors are now treated to obtain ammonia and carbonic acid in
any usual or suitable way.

page_text: COMPLETE SPECIFICATION.
Improvements in Obtaining Muriate of Ammonia and Carbonate of
Lime from the Residual Chloride Liquors of the Ammonia
Alkali Process.
I CHARLES WIGG, of Walmer Buildings 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 :--
In the treatment of chloride liquors left after the extraction of bicarbonate of soda
in the ammonia alkali process for the purpose of obtaining in the form of muriate of
ammonia all the ammonia and the carbonic acid combined with lime to form carbonate
of lime the free alkali has hitherto been neutralized with hydrochloric acid which is
troublesome to work with and not only very quickly destroys the plant used but also
imports iron into the chloride liquors which afterwards discolours the muriate of
ammonia produced; it further causes loss of carbonic acid and oftentimes also of
ammonia by effervescence and frothing over of the contents of neutralizing vessels.
Now the object of my invention is to obviate the above objections and to so treat
the chloride liquors that ammonia in the form of muriate of ammonia, and carbonic
acid combined with lime to form carbonate of lime may be obtained therefrom without
loss and injury from the above causes. ·
The invention consists essentially in first neutralizing the free alkali and carbonic
acid contained in the liquors by the addition thereto of chloride of calcium thereby
forming muriate of ammonium and carbonate of lime or calcium carbonate which
latter is removed from the solutiou (now consisting practically of muriate or chloride
of ammonia) by filtration decantation, or other suitable means for separating solids
from liquids. The carbonate of lime or calcium carbonate is then used for any
purpose for which it is suitable.
The neutralized liquors are treated to obtain solid muriate of ammonia in any usual
or suitable way.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
:
Subjecting residual chloride liquors in the soda ammonia process to the action of
chloride of calcium until any free alkali is neutralized separating the carbonate of
calcium from the neutralized liquors; and utilizing the said liquors in any usual
or suitable way.
noted this 20th day of Amnil 1000