An Improvement in the Treatment of Mineral Phosphates.
Year: 1898

page_text: Date of Application, 11th June, 1898
Complete Specification Left, 3rd Mar., 1899-Accepted, 15th Apr., 1899
PROVISIONAL SPECIFICATION.
An Improvement in the Treatment of Mineral Phosphates.
We, ELECTRIC REDUCTION COMPANY LIMITED, of No 22, Austin Friars, in the
City of London, do hereby declare the nature of this invention (as communicated
to us from abroad by William Taylor Gibbs, of Buckingham, Quebec, Canada,
Chemist) to be as follows.-
In the process for decomposing mineral phosphates by the application of heat,
electrical or otherwise in order to obtain phosphorus, silica is the substance usually
employed to take the place of the phosphoric acid in the mineral phosphate under
treatment and the phosphoric acid is decomposed by carbon added for that purpose,
the phosphorus being recovered by condensation of its vapour
The present improvement consists in substituting siliceous and aluminous
potash or soda-bearing minerals such as felspar for the silica and thus there 18
produced a alag of commercial value, containing both potash and alumina in such
form and condition as to be easily converted into alum by treatment with sulphuric
acid or to be otherwise treated for the recovery of potash and alumina
Dated this 11th day of June 1898.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improvement in the Treatment of Mineral Phosphates.
We, ELECTRIC REDUCTION COMPANY LIMITED, of No 22, Austin Friars, in the
City of London, do hereby declare the nature of this invention (as communicated
to us from abroad by William Taylor Gibbs, of Buckingham, Quebec, Canada,
Chemist) and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement
-
In the process for decomposing mineral phosphates by the application of heat,
electrical or otherwise in order to obtain phosphorus, silica is the substance usually
employed to take the place of the phosphoric acid in the mineral phosphate unde.
treatment and the phosphoric acid is decomposed by carbon added for that purpose,
the phosphorus being recovered by condensation of its vapour
The present improvement consists in substituting siliceous and aluminous
potash or soda-bearing minerals such as felspai for the silica and thus there is
produced a slag of commercial value, containing both potash and alumina in such
form and condition as to be easily converted into alum by treatment with sulphuric
acid or to be otherwise treated for the recovery of potash and alumina
Instead of supplying sufficient carbon to effect decomposition of all the phos-

page_text: phoric acid evolved in the reaction, the supply of carbon may be more or less
reduced so that, besides the slag above mentioned certain phosphates are obtained
which are valuable as fertilisers
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, we declare that what we
claim is:
-
In the process for decomposing mineral phosphates by the application of heat,
the substitution of siliceous or aluminous potash or soda bearing minerals such
as felspar for the silica usually employed to take the place of the phosphoric acid
evolved, for the purpose set forth
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