IMPROVEMENTS IN THE RECLAMATION OF MATERIALS EM- PLOYED IN THE MANUFACTURE OF DI-PHOSPHATE AND TRI-PHOSPHATE OF LINE
Year: 1872

page_text: LETTERS PATENT to Campbell Morfit, of Baltimore, State of Mary-
land, United States of America, Chemist, but at present of 35,
Southampton Buildings, in the County of Middlesex, for the
Invention of "IMPROVEMENTS IN THE RECLAMATION OF MATERIALS EM-
PLOYED IN THE MANUFACTURE OF DI-PHOSPHATE AND TRI-PHOSPHATE OF
LINE."
Sealed the 21st March 1873, and dated the 24th September 1872.
PROVISIONAL SPECIFICATION left by the said Campbell Morfit at
the Office of the Commissioners of Patents, with his Petition, on
the 24th September 1872.
I, CAMPBELL MORPIT, of Baltimore, State of Maryland, United States
5 of America, Chemist, but at present of 35, Southampton Buildings, in
the County of Middlesex, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE RECLAMATION OF MATERIALS EMPLOYED
In the ManufactURE OF DI-PHOSPHATE AND TRI-PHOSPHATE OF LIME," to be as
follows:

page_text: my processes for which I obtained Provisional Protection on August 6, 7,
and 8, 1872, and numbered respectively 2341, 2344, and 2357, the
precipitation is so managed that the mother liquor shall consist almost
wholly of aluminium and iron or magnesium chlorides. Now the object
of this Invention is to make this mother liquor the source of the hydro-
chloric acid for all successive digestions or solutions of the crude natural
phosphate, that is, after that initial quantity of hydrochloric acid which
is necessary for the solution or digestion of the first batch of crude or
mineral phosphate, there need not be any purchase of further supplies,
as its initial quantity can be recovered again and again indefinitely for
any number of successive repetitions of its digesting work upon fresh
mineral.
And the manner by which I accomplish this result is as follows:-
The mother water being drawn off or filtered from the precipitate is
then evaporated to dryness, after which the dried mass is put into 1
suitable retorts and heated by direct fire beneath or by currents of
superheated steam coursing within. By this means that portion of the
mass other than chloride of calcium will give up its hydrochloric acid in
a volatile form, and magnesia or aluminium, and iron oxides or phos-
phates will remain in solid form to be utilised for precipitating fresh
liquors as before.
The hydrochloric acid gas passes off in mixture with more or less
aqucous vapour, and on being led through coke towers will be condensed
into liquid form for use again in digesting or dissolving fresh batches of
crude or mineral phosphates.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Campbell Morfit in the Great Seal Patent Office
on the 21st March 1878.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Campbell
MORFIT, of Baltimore, State of Maryland, United States of America, 3
Chemist, but at present of 35, Southampton Buildings, in the County of
Middlesex, send greeting.

page_text: of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth ycar of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Campbell Morfit, Her special license that
I, the said Campbell Morfit, my executors, administrators, and assigns,
or such others as I, the said Campbell Morfit, my executors, admini-
strators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE RE-
CLAMATION OF MATERIALS EMPLOYED IN THE MANUFACTURE OF DI-PHOSPHATE AND
TRI-PHOSPHATE OF Lime,” upon the condition (amongst others) that I, the
said Campbell Morfit, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Scal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Campbell Morfit, do hereby declare
the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement thereof, that is to say :-
In the manufacture of precipitated di- or tri-phosphate of lime from
hydrochloric solutions of crude natural phosphates of lime according to
my processes for which I obtained Letters Patent dated August 6th, 7th,
and 8th, 1872, and numbered respectively 2341, 2344, and 2357, the
precipitation is so managed that the mother liquor shall consist almost
wholly of aluminium and iron or magnesium chlorides. Now the object
of this Invention is to make this mother liquor the source of the hydro-
chloric acid for all successive digestions or solutions of the crude natural
phosphate, that is, after that initial quantity of hydrochloric acid
which is necessary for the solution or digestion of the first batch of
crude or mineral phosphate, there need not be any purchase of further
supplies, as its initial quantity can be recovered again and again
indefinitely for any number of successive repetitions of its digesting
work upon fresh mineral.
And the manner by which I accomplish this result is as follows:-
The mother water being drawn off or filtered from the precipitate is then

page_text: evaporated to dryness, after which the dried mass is put into suitable
retorts and heated by direct fire beneath or by currents of superheated
steam coursing within. By this means that portion of the mass other
than chloride of calcium will give up its bydrochloric acid in a volatile
form, and magnesia or aluminium and iron oxides or phosphates will 5
remain in solid form to be utilised for precipitating fresh liquors as
before.
The hydrochloric acid gas passes off in mixture with more or less
aqueous vapour, and on being led through coke towers will be condensed
into liquid form for use again in digesting or dissolving fresh batches of 1
crude or mineral phosphates.
Having thus described the nature of my said Invention and the
mode of carrying the same into effect, I would have it understood that
what I claim is the reclamation of the acid and bases of the mother
liquor aforesaid for the solution, precipitation, and refining of crude and 1
mineral phosphates of lime after the manner and means hercin substan-
tially set forth.
In witness whereof, I, the said Campbell Morfit, have hereunto
set my hand and scal, this Twelfth day of March. in the year of
tially set forth.
In witness whereof, I, the said Campbell Morfit, have hereunto
set my hand and scal. this Twelfth day of March, in the year of
our Lord One thousand eight hundred and seventy-three.