Process of Manufacture of Ammoniacal Calcic Phosphate.
Year: 1889

page_text: Date of Application, 28th Mar., 1889
Complete Specification Left, 21st Dec., 1889-Accepted, 25th Jan., 1890
PROVISIONAL SPECIFICATION.
Process of Manufacture of Ammoniacal Calcic Phosphate.
I, GEORGES AUGUSTE HONORE GABET, of 88 rue de Richelieu, Paris, in the
Republic of France, Gentleman, do hereby declare the nature of this invention to be
as follows:-
My invention has for its object the manufacture of a new manure ammoniacal
calcic phosphate-composed wholly of phosphoric acid, ammonia and lime.
I obtain this product in the following manner :-
I substitute for the sulphuric acid employed in works where ammoniacal salts are
manufactured for manure, for fixing the ammonia obtained by the distillation of urine
or dung water and ammoniacal liquors of any kind, a concentrated acid solution of
phosphate of lime to which I supply the ammoniacal gas until it is neutralized. Under
its action the phosphate solution becomes a pasty mass, which on being subjected to a
gentle heat rapidly dries. The dessication will further take place equally well, even
if the acidity of the solution has not been entirely neutralized.
I will now describe what I think to be the most advantageous manner of utilizing
this reaction.
I employ a shallow cylindrical enamelled iron vessel to receive the phosphate
solution. This vessel is hermetically closed by a cover, to the side of which is
connected the pipe conveying the ammoniacal gas from the distilling apparatus.
This cover is provided at its centre with an agitator serving to mix the solution from
time to time.
With a single vessel it would be necessary to interrupt the distillation of the
ammonia at each operation, in order to avoid which several vessels may be employed,
and connected together and with the distilling apparatus by connections which may be
cut off at will.
It will be understood that instead of leading the ammoniacal gas directly to the acid
solution of phosphate of lime, it may be directed into water and the ammoniacal
solution thus obtained be used to saturate the phosphate solution, but I find it more
advantageous to lead the ammoniacal gas directly to the phosphate solution as above
described.
My process while permitting me to economically condense into a small volume the
two elements which are most requisite to the ground, nitrogen and phosphoric acid,
effects a considerable improvement in the manufacture of ammoniacal salts for manure,
and furnishes a new industrial product, no product of the same richness and the same
composition having been hitherto prepared in the manufacture of manures.
There is furthur a new application of known means for obtaining an industrial
product, a concentrated acid solution of phosphate of lime never having been employed
to the present time for fixing the ammonia in works for the manufacture of ammoniacal
salts for manures.
With regard to the concentrated acid solution of phosphate of lime, the same may
be prepared in various ways, the following being a suitable method:-Natural.
phosphates as free as possible from iron and alumina, are subjected to the action of
the desired quantity of sulphuric acid, then diluted with water and left together; the
acid solution of phosphate of lime is separated by filtration and after the sulphuric
acid it contains has been precipitated by baryta, the solution is concentrated to the
consistency of a syrup.
Tinted this. 98th day of March 1889
ALLISON BROS:,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Process of Manufacture of Ammoniacal Calcic Phosphate.
I, GEORGES AUGUSTE HONORÉ GABET, of 88 rue de Richelieu, Paris, in the
Republic of France, Gentleman, do hereby declare the nature of this invention, and
in, what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention has for its object the manufacture of a new manure-ammoniacal
calcic phosphate-composed wholly of phosphoric acid, ammonia and lime.
I obtain this product in the following manner :-
I substitute for the sulphuric acid employed in works where ammoniacal salts are
manufactured for manure, for fixing the ammonia obtained by the distillation of
urine or dung water and ammoniacal liquors of any kind, a concentrated solution of
acid phosphate of lime to which I supply the ammoniacal gas until it is neutralized.
Under its action the phosphate solution becomes a pasty mass, which on being
subjected to a gentle heat rapidly dries. The dessication will further take place
equally well, even if the acidity of the solution has not been entirely neutralized.
I will now describe what I think to be the most advantageous manner of utilizing
this reaction.
I employ a shallow cylindrical enamelled iron vessel to receive the phosphate
solution. This vessel is hermetically closed by a cover, to the side of which is
connected the pipe conveying the ammoniacal gas from the distilling apparatus.
This cover is provided at its centre with an agitator serving to mix the solution from
time to time.
With a single vessel it would be necessary to interrupt the distillation of the
ammonia at each operation, in order to avoid which several vessels may be employed,
and connected together and with the distilling apparatus by connections which may
be cut off at will.
It will be understood that instead of leading the ammoniacal gas directly to the
solution of acid phosphate of lime, it may be directed into water and the ammoniacal
solution thus obtained be used to saturate the phosphate solution, but I find it more
advantageous to lead the ammoniacal gas directly to the phosphate solution as above
described.
My process while permitting me to economically condense into a small volume the
two elements which are most requisite to the ground, nitrogen and phosphoric acid,
effects a considerable improvement in the manufacture of ammoniacal salts for manure,
and furnishes a new industrial product, no product of the same richness and the
same composition having been hitherto prepared in the manufacture of manure.
There is further a new application of known means for obtaining an industrial
product, a concentrated solution of acid phosphate of lime never having been employed
to the present time for fixing the ammonia in works for the manufacture of ammoniacal
salts for manures.
With regard to the concentrated solution of acid phosphate of lime, the same may
be prepared in various ways, the following being a suitable method:-Natural
phosphates free as much as possible from iron and alumina, are subjected to the action
of the desired quantity of sulphuric acid, then diluted with water and left together;
the solution of acid phosphate of lime is separated by filtration and after the sulphuric
acid it contains has been precipitated by baryta, the solution is concentrated to the
consistency of a syrup.
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. The employment of a solution of acid phosphate of lime for fixing ammonia

page_text: to be used as manure, such application enabling me to produce a product composed
wholly of lime, nitrogen and phosphoric acid, and of exceptional richness in the two
latter substances.
2. The new product obtained as described in the preceding claim.
ALLISON BROS.,
Agents for the Applicant.