Improvement in the Manufacture and Storing of Superphosphates and the like.
Year: 1896

page_text: Date of Application, 8th May, 1896
Complete Specification Left, 6th Feb.. 1897-Accepted, 10th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvement in the Manufacture and Storing of Superphosphates
and the like.
FREDERICK MORGAN MOONEY, Chemical Manufacturer ALEXANDER
DICKSON, Chemical Manufacturer's Manager both of 74 Rogersons Quay
Dublin Ireland do hereby declare the nature of this invention to be as
follows:-
In utilising the liquid condition of the mixture of phosphates and acid when
first brought together in the mixer at a height from the ground-whereby the
mixture may be caused to run a considerable distance so as to command several
large stores arranged so as to combine the customary mixing dens and the stores
necessary thereto-and thereby obviate the process of the digging out of the
superphosphates and the like from the dens and the separate storing of same as has
hitherto been necessary.
F. M. MOONEY.
A. DICKSON.
COMPLETE SPECIFICATION.
Improvement in the Manufacture and Storing of Superphosphates
and the like.
We FREDERICK MORGAN MOONEY Chemical Manufacturer and ALEXANDER
DICKSON Manager both of 74, Rogersons Quay, Dublin, Ireland, 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 manufacture of superphosphates, bone manures and the like in which tri-
basic phosphate is converted into mono-basic or di-basic phosphate, the phosphatic
materials are ground and mixed with acid. They are then left for a time in "dens"
so as to allow the fumes partly to escape, the reaction to go on further, and the
material to solidify. After a day or two the still hot material is dug out and
carried to the stores. Now this digging out and carriage is expensive and very
disagreeable owing to the corrosive nature of the fumes and of the material.
Further this mechanical process (cooling the mass) stops the reaction before it is
completed and the heat that would otherwise be used in evaporating moisture is
eliminated and wasted.
Now our invention is designed to obviate these evils and consists in utilizing the
liquid condition of the mixture of phosphatic materials and acid when first brought
together in and delivered from the mixer to automatically carry the material to
large stores and in keeping it there in large masses for a considerable period
(weeks or months if necessary) till the reaction is finished and the heat thereof
has been utilized nearly to its fullest extent in evaporating moisture. This is

page_text: accomplished by placing the mixer a considerable height above the stores and
running the material down spouts from the mixer to the various stores. By this
means the capacious stores are used as dens and the disagreeable and expensive
process of digging out the superphosphate in its hot and still fuming state is
obviated.
By this means too a large bulk of mixed material can rest undisturbed for weeks
without interfering with the working of the plant-thus retaining to a much
greater extent than heretofore the heat developed by the chemical reaction and
driving off a larger amount of the moisture and also effecting a more complete
decomposition of the insoluble phosphates and other materials used than when the
mixture is subjected to the cooling consequent on the method of lifting and
removing soon after mixing as at present done. The lower percentage of moisture
and the higher percentage of soluble constituents in the finished product enables us
to sell it at an enchanced price over that which we had before obtained for manure
from the same quality of original constitutents.
In thus describing our invention we do not bind ourselves to the exact arrange-
ment described as in some cases it may be found impracticable to raise the mixer to
a height and more convenient to use horizontal or slightly inclined mechanical
conveyers to carry the material from the mixer to the store or arrange the mixer
itself to be portable and deliver successively to the various stores.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improvement in the process of manufacturing and storing acid phosphate
accompanied or not as the case may be with nitrogenous or other materials which
consists in conveying the liquid materials direct from the mixer to the store
substantially as and for the purposes described.
2. The improvement in the manufacture and storing of superphosphates and the
like such as described which consists in conveying the mixed materials while still
liquid or without handling to the stores and allowing them to remain undisturbed
in large masses till the reaction is complete substantially as described.
Dated this 5th day of February 1897
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.