IMPROVEMENTS IN THE MANUFACTURE OF SUPERPHOSPHATE OF LIME AND ARTIFICIAL MANURE
Year: 1872

page_text: LETTERS PATENT to Edward Packard, junior, of Ipswich, in the
County of Suffolk, for the Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF SUPERPHOSPHATE OF LIME AND ARTIFICIAL MANURE."
Sealed the 14th January 1873, and dated the 3rd August 1872.
PROVISIONAL SPECIFICATION left by the said Edward Packard at
the Office of the Commissioners of Patents, with his Petition, on
the 3rd August 1872.
I, EDWARD PACKARD, junior, of Ipswich, in the County of Suffolk,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
THE MANUFACTURE OF SUPERPHOSPHATE OF LIME AND ARTIFICIAL MANURE," to be
as follows:-
This Invention has for its object improvements in the manufacture
of ammoniacal superphosphate of lime and artificial manure.
This Invention relates to the manufacture of superphosphate of lime
from any of the phosphates of lime of commerce, but especially those
of low per-centage, and to the manufacture of such a superphosphate aș
°

page_text: shall permit the further operations necessary to its being converted into
a highly concentrated and ammoniated superphosphate of lime, thus
forming an easily soluble and valuable manure well adapted to export.
The Invention also relates to the manufacture of salts of ammonia
from crude gas liquor by the application of superphosphate of lime,
thus enabling weak ammoniacal liquor to be economically employed in
the preparation of manures. For this purpose I take any of the phos-
phates of commerce and treat them with sulphuric acid according to
the strength, quality, and condition of the phosphate to. be operated
upon, taking care always to employ acid slightly in excess of the quantity
necessary to render the phosphate soluble; thus having formed a thick
pasty mass I allow it to rest 24 hours; the pasty mass is then removed
and treated with water in proportion to the strength of ammoniacal
liquor to be employed, but at all times sufficient to give it the con-
sistence of a thick cream. Ammoniacal liquor from the gasworks
or other suitable source is added until the solution gives but a faint
acid reaction,
The solution thus prepared is allowed to subside and the clear liquor
removed and evaporated to dryness, when it is ready for market. Or the
solution is concentrated and drying material, such as are used in the
manufacture of artificial manure, added so as to produce a manure of any
desired strength. A further quantity of water is then added to the
residue, which being well agitated is again allowed to subside, and the
supernatant liquor drawn off is employed in the next operation for
reducing the pasty mass to a creamy consistence.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Packard in the Great Seal Patent Office
on the 1st February 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Edward
PACKARD, junior, of Ipswich, in the County of Suffolk, send greeting,
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of August, in the year 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

page_text: '
and grant unto me, the said Edward Packard, junior, Her special
license that I, the said Edward Packard, junior, my executors, adminis-
trators, and assigns, or such others as .I the said Edward Packard, junior,
my executors, administrators, and assigns should at any time agrec
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 "Im-
PROVEMENTS IN THE MANUFACTURE OF SUPERPHOSPHATE OF LIME AND ARTIFICIAL
MANURE," upon the condition (amongst others) that I, the said Edward
Packard, junior, 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 Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW.YE, that I, the said Edward Packard, junior, 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 :-
This Invention has for its object improvements in the manufacture of
ammoniacal superphosphate of lime and artificial manures.
The Invention relates to the manufacture of superphosphate from low
quality or other phosphate, so that ammonia may be combined with the
soluble phosphate, forming an artificial manure of great concentration
and well adapted for use in countries where saving in freight is an object.
The ammonia above alluded to is best derived from the weak or strong
gas liquor of gas works. For this purpose I take any of the phosphates
of commerce and treat them with sulphuric acid according to the
strength, quality, and condition of the phosphate to be operated upon,
taking care always to employ acid slightly in excess of the quantity
necessary to render the phosphate soluble. Thus having formed a thick
pasty mass I allow it to rest 24 hours; the pasty mass is then removed
and treated with water in proportion to the strength of ammoniacal
liquor to be employed, but at all times sufficient to give it the consistenco
of a thick cream. Ammoniacal liquor from the gasworks or other
suitable source is added until the solution gives but a faint acid reaction,
and the solution will contain a combination of lime, phosphoric acid,

page_text: sulphuric acid, and ammonia according to the strength and quality of
the original materials employed.
The solution thus prepared is allowed to subside and the clear liquor
removed and evaporated to dryness, when it is ready for the market. Or
the solution is concentrated and any suitable drying materials, such as
are used in the manufacture of artificial manure, added so as to produce
a manure of any desired strength. A further quantity of water is then
added to the residue which being well agitated is again allowed to
subside, and the supernatant liquor drawn off is employed in the next
operation for reducing the pasty mass to a creamy consistence.
What I claim is the manufacture of ammoniacal superphosphate of
lime and artificial manure, substantially as described.
In witness whereof, I, the said Edward Packard, junior, have
hereunto set my hand and seal, this Thirtieth day of January, in
the year of our Lord One thousand eight hundred and seventy-
three...
EDWARD PACKARD, JR. (L.S.)