IMPROVEMENTS IN THE MODE OF TREATING PHOSPHATES OF LIME FOR MANURING AND OTHER PURPOSES
Year: 1874

page_text: LETTERS PATENT to Edward Primerose Howard Vaughan, F.C.S.,.
of 54, Chancery Lane, in the County of Middlesex, Patent
Agent, for the Invention of "IMPROVEMENTS IN THE MODE OF TREATING
PHOSPHATES OF LIME FOR MANURING AND OTHER PURPOSES."-A com-
munication from abroad by Count Victor François Leonard
Huyttens de Terbecq, of Paris, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Edward Primerose
Howard Vaughan at the Office of the Commissioners of Patents,
with his Petition, on the 22nd June 1874.
I, EDWARD PRIMEROSE HOWARD VAUGHAN, F.C.S., of 54, Chancery
Lanc, in the County of Middlesex, Patent Agent, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN THE MODE OF
TREATING PHOSPHATES OF LIME FOR MANURING AND OTHER PURPOSES," being a
communication to me from abroad by Count Victor François Leonard

page_text: Huyttens de Terbecq, of Paris, in the Republic of France, to be as
follows:-
This Invention consists in the direct application of sulphuric acid to
the treatment of uncrushed phosphates of lime when subjected to
constant friction or attrition in suitable apparatus, such as that covered
by the Letters Patent granted to me under date of the Ninth day of
May 1874, No. 1644.
By the present process the sulphuric acid diluted as required is placed
in contact with the crude or uncrushed phosphate of lime contained in
a revolving cylinder, in the movement of which the sulphate of lime
produced is, together with the insoluble constituents of the mineral,
constantly detached by the friction of the nodules against each other,
and separates by precipitation from the clear solution of acid phosphate
of lime formed at same time, which is drawn off when sufficiently
saturated.
The sand and alumina detached in this process tend to prevent the
agglomeration of the sulphate of lime. On the other hand the solution
remains at about the same density during the operation instead of
becoming viscid, as is the case when the mineral is treated by hydro-
chloric acid, which dissolves together the lime, the phosphoric acid, and
other constituents of the nodules. The solution obtained as above is
therefore almost entirely composed of soluble phosphate of lime, which
if desired, may be reduced by evaporation to the consistence of honey,
and in this state be used for the manufacture of phosphorus.
The precipitated sulphate of lime separated from the layer of heavier
sand at the bottom of the recipient may be subsequently intermixed
with the phosphate solution in any desired proportion for manuring
purposes.
The free sulphuric acid remaining in the solution may be neutralised
by ammonia when the product is intended for manure, or by phosphate
of lime precipitated from a muriatic solution when intended for use in
the manufacture of phosphorus.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Primerose Howard Vaughan in the Great
Seal Patent Office on the 14th December 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
PRIMEROSE HOWARD VAUGHAN, F.C.S., of 54, Chancery Lane, in the
County of Middlesex, Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of June, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs, and suc-
cessors, give and grant unto me, the said Edward Primerose Howard
Vaughan, Her special licence, that I, the said Edward Primerose
Howard Vaughan, my executors, administrators, and assigns, or such
others as I, the said Edward Primerose Howard Vaughan, my
executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times there-
after 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 Inven-
tion for "IMPROVEMENTS IN THE MODE OF TREATING PHOSPHATES OF LIME FOR
MANURING AND OTHER PURPOSES," a communication to me from abroad by
Count Victor François Leonard Huyttens de Terbecq, of Paris, in the
Republic of France, upon the condition (amongst others). that I, the
said Edward Primerose Howard Vaughan, my executors or adminis-
trators, 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 per-
formed, 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 Primerose Howard
Vaughan, 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, that is
to say :-
This Invention consists in the direct application of sulphuric acid to

page_text: the treatment of uncrushed phosphates of lime when subjected to
constant friction or attrition in suitable apparatus, such as that covered
by the Letters Patent granted to me under date of the Ninth day of
May 1874, No. 1644.
. By the present process the sulphuric acid, diluted as required, is a
placed in contact with the crude or uncrushed phosphate of lime con-
tained in a revolving cylinder, in the movement of which the sulphate
of lime produced is, together with the insoluble constituents of the
mineral, constantly detached by the friction of the nodules against each
other, and separated by precipitation from the clear solution of acid 1
phosphate of lime formed at the same time, which is drawn off when
sufficiently saturated.
:
The sand and alumina detached in this process tend to prevent the
agglomeration of the sulphate of lime. On the other hand, the
solution remains at about the same density during the operations
instead of becoming viscid, as in the case when the mineral is treated
by hydrochloric acid, which dissolves together the lime, the phosphoric
acid, and other constituents of the nodules. The solution obtained as
above is therefore almost entirely composed of soluble phosphate of
lime, which if desired, may be reduced by evaporation to the consis- a
tancy of honey, and in this state be used for the manufacture of

page_text: to constant attrition in suitable apparatus, the whole substantially as
herein set forth.
In witness whereof, I, the said Edward Primerose Howard Vaughan,
have hereunto set my hand and seal, this Fourteenth day of
December, in the year of our Lord One thousand eight hundred
and seventy-four.
E. P. H. VAUGHAN. (L.S.)