Improvements connected with the Manufacture of Nitric Acid, Muriatic Acid, or the like where Sulphuric Acid is employed, and of Superphosphate of Lime.
Year: 1893

page_text: Date of Application, 3rd May, 1893
Complete Specification Left, 8th Sept., 1893-Accepted, 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements connected with the Manufacture of Nitric Acid,
Muriatic Acid, or the like where Sulphuric Acid is employed,
and of Superphosphate of Lime.
I MANNING PRENTICE of Woodfield, Stowmarket in the County of Suffolk,
Manufacturing Chemist do hereby declare the nature of this invention to be
as follows:-
In the manufacture of nitric acid or of muriatic acid or in like manufactures
where sulphuric acid is employed the use of a considerable excess of sulphuric acid
would be a great advantage but considerations of economy have hitherto prevented
the use of such excess of sulphuric acid.
It is the object of my invention to enable such excess of acid to be employed
with ecomony and with this object I combine the aforesaid manufactures with the
manufacture, or production of superphosphate of lime and I use in the manufacture of
such superphosphate the excess of acid which has been employed in the manufacture
of nitric acid, muriatic acid or the like.
Taking, as an example, the manufacture of nitric acid combined with the manu-
facture of superphosphate of lime, I treat the nitrate of soda with a large excess of
sulphuric acid whereby the production of nitric acid is greatly facilitated and the
excess of acid together with the bisulphite of soda which results from the
decomposition of the nitrate of soda is run off into the phosphate of lime the excess
of acid converting the said phosphate into superphosphate.
Dated this 3rd day of May 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements connected with the Manufacture of Nitric Acid,
Muriatic Acid, or the like where Sulphuric Acid is employed;
and of Superphosphate of Lime.
I, MANNING PRENTICE, of Woodfield, Stowmarket, in the County of Suffolk,
Manufacturing 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 :-
In the manufacture of nitric acid, or of muriatic acid, or in like manufactures
where sulphuric acid is employed, the use of a considerable excess of sulphuric
acid would be a great advantage but considerations of economy have hitherto
prevented the use of such excess of sulphuric acid. It is the object of my
invention to enable such excess of acid to be employed with economy, and, with
this object I combine the aforesaid manufactures with the manufacture, or
production, of superphosphate of lime, and I use in the manufacture of such super-
phosphate the excess of acid which bas been employed in the manufacture of nitrio
acid, muriatic acid, or the like.
Taking as an example, the manufacture of nitric acid combined with the
manufacture of superphosphate of lime, I treat the nitrate of soda with a large
excess of sulphuric acid whereby the production of nitric acid is greatly facilitated
and the excess of acid together with the bisulphate of soda which results from the
decomposition of the nitrate of soda is run off and is mixed with the phosphate of
lime the excess of acid converting the said phosphate into superphosphate.

page_text: The apparatas used in both the manufacture of the nitric acid, the muriatic acid
or the like, and in the manufacture of the superphosphate may each be of the usual
or any suitable description they being combined in any suitable manner to allow of
the aforesaid excess of acid together with the sulphate produced being run off and
introduced into the vessel in which the superphosphate is produced.
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 :-
The combined manufacture of nitric acid, muriatic acid, or the like, wherein
sulphuric acid is employed, and of superphosphate of lime, consisting in employing,
in the manufacture of the nitric acid, muriatic acid, or the like, an excess of
sulphuric acid and the utilisation of the residual product from the said manufacture
in the production of superphosphate of lime as hereinbefore explained.
Dated this 8th day of September 1893.
J. H. JOHNSON & Co., 1
Agents.