4 допуца Compounds for Artificial Manures.
Year: 1887

page_text: Date of Application, 17th Feb., 1887
Complete Left, 16th Nov., 1887
Complete Accepted, 20th Dec., 1887
ици
сощутили 4 допуца
Compounds for Artificial Manures.
ARCHIBALD CAMPBELL 19 Harold Road, Upton Park, Essex, manufacturing &
analytical chemist do hereby declare the nature of this invention to be as follows:-
The mixing together of a suitably prepared Phosphate of Alumina or iron (such as
Redonda, Alta Vela &c.) with-by preference_low class phosphates of lime which
have had their phosphoric acid rendered soluble in the usual manner of sulphuric
acid.
The special preparation of the phosphates of aluminia or iron consists in calcining
and subsequently grinding them to a fine powder. By calcination the phosphates lose
their water of combination (about 22 per cent.) the percentage of phosphoric acid
being proportionately increased, and rendered soluble in citrate of ammonia. It is by
virtue of the latter property that this variety of phosphates is suitable for mixing with
ordinary phosphate of lime manures. The Redonda or other phosphate after calcina-
tion and grinding, is in a fit condition for use, and is mixed with an ordinary
phosphate of lime " basis" in such proportion as may be required or found suitable for
the particular manure being prepared. I mix it by preference as the manure "basis "
leaves the mixing "pit" or "den" and by subsequent disintegration a manure neutral,
and in a fine friable dry powder, is obtained.
As calcined "Redonda" Phosphate contains about 46 % of assimilable phosphoric
acid, a small percentage added to a manure "basis" has a wonderful effect in raising
the percentage of available phosphates, every cwt. per ton of the mixture increasing
the available phosphoric acid therein by 1.8 per cent.
Dated this 16th day of February 1887.

page_text: Compounds for Artificial Manures.
ARCHIBALD CAMPBELL of 42 Whittaker Road Upton Park, Essex formerly of
19 Harold Road Upton Park, Essex, Chemist 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 :-
The mixing together of a suitably prepared phosphate of Alumina or Iron (such as
Redonda, Alta Vela &c.) with by preference low class phosphates of Lime which have
had their phosphoric acid rendered soluble in the usual manner by sulphuric acid.
The special preparation of the Phosphates of Alumina or iron consists in calcining
and subsequently grinding them to a fine powder. By calcination, the phosphates lose
their water of combination (about 22 per cent.) the percentage of phosphoric acid being
proportionately increased and rendered soluble in citrate of ammonia. It is by virtue
of the latter property that this variety of phosphates is suitable for mixing with-
preferably low percentage superphosphates of lime, and so furnishing manures
soluble in water and citrate of ammonia of almost any desired phosphoric acid
strength.
The Redonda or other phosphate having been calcined and finely ground I prefer
to mix it with the "basis" as it leaves the mixing "pit" or "den" though this is by
no means necessary, as it may be used equally advantageously with a "basis" that
has been prepared for months as with one leaving the mixing pit or den. The mixture
in the proportions desired is thoroughly mixed either by hand, or in a disinte
grator, or such other mixing machine as may be found convenient, and a manure
neutral, friable and in a fine powder is the result.
Late experiments have established that calcined Redonda phosphate contains on
an average 48 % of Phosphoric Acid soluble in Ammoniacal citrate of Ammonia,
and the following illustrations will shew the effect of mixing this preparation with
say a 10% superphosphate "basis," and the percentage of Phosphoric acid
(soluble in water & citrate of Ammonia) that will be found in the resultant
manure :-

page_text: "
The words " basis ог "bases" ocurring in this specification, refer to the phos-
phatic mixture or mixtures which are to form the groundwork of any proposed
manure, and which may be either a simple superphosphate or an ammoniated,
or potassic superphosphate, or a mixture of all three. These mixtures when the
nitrogen is obtained from organic substances, such as shoddy, &c., are usually made in
the mixer; phosphate of lime, shoddy, sulphate of potash, and sulphuric acid, being
mixed therein in such proportions as may be desired, and the mass on being removed
from the "pit" or "den" is termed the "basis." This basis can have its phosphoric
acid increased, in precisely the same manner as is done in the case of superphosphate,
and as already described, by the addition to it, of the prepared Redonda or other
similar phosphate. Thus, suppose a "basis" has been prepared in the mixer, which
contains 5 per cent. of phosphoric acid (soluble in water and citrate of ammonia), 5 per
cent. of nitrogen, and 10 per cent. of potash, and a manure is required containing 13
to 14 per cent. of phosphoric acid (soluble in citrate of ammonia), 4 per cent. of
nitrogen, and 8 per cent. of potash; all that is required, is to take 16 cwts. of the
basis," and 4 cwts. of the prepared Redonda phosphate, and mix them thoroughly,
the result is 20 cwts. of the manure required. When both nitrogen and potash exist
as salts, such as the sulphate, a mixture of these salts may be made with ordinary
superphosphate, in the dry state, adding simultaneously if so desired, the prepared
Redona phosphate in suitable proportion.
"6
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 treatment of the phosphates of iron and alumina by calcination and
grinding so as to render them or their phosphoric acid soluble in Ammoniacal Citrate
of Ammonia, and so prepare and make themi suitable for compounding with low per-
centage superphosphates of lime, or other manurial bases, so as to yield manure
soluble in water and Citrate of Ammonia.
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2. The mixing in any suitable manner, of the Redonda or other phosphate so
prepared, with low percentage superphosphates of lime "bases," or with other "bases
containing nitrogen, or potassium, or both of these elements, so as to readily increase
the percentage of phosphoric acid soluble in Citrate of Ammonia.
Dated this 16th day of November 1887.
ARCHIBALD CAMPBELL.