Improvements in the Recovery of Iron from the Ferruginous Residue left in the Production of Amine Bases.
Year: 1892

page_text: Date of Application, 22nd Dec., 1892
Complete Specification Left, 4th Sept., 1893-Accepted, 4th Nov.,
1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by LANDSHOFF AND MEYER, of Grünau, near Berlin,
Manufacturing Chemists, trading as "Die Chemische Fabrik Grünau."]
Improvements in the Recovery of Iron from the Ferruginous
Residue left in the Production of Amine Bases.
I, SAMUEL SIDNEY BROMHEAD 97 Newgate Street, London in the County of
Middlesex (communication) do hereby declare the nature of this invention to be as
follows:-
The object of this invention is the reconvertion of the ferruginous residue formed
in the production of amine bases into iron of such a quality that it may at once be
used again for continuing the production of the above bases.
The ferruginous residue, which we will suppose to be free from soluble salts, is
placed in a muffle or closed chamber or retort heated externally to a moderate red
heat and treated with steam in order to destroy the chlorides of iron existing in the
residue. The gaseous hydrochloric acid escapes at the mouth of the retort and is
absorbed by water.
The retort is then heated to a full red heat or a heat near melting point. By
the reaction under the influence of heat, of the carbonaceous substances, contained
in the ferruginous residue with the oxides of iron, the residue is converted into a
partially reduced mass containing 30 to 40 per cent. of metallic iron.
In order to effect the complete deoxydation of the oxides of iron, they are covered
with a considerable excess of charcoal or coke beyond what is necessary for mere
reduction.
Instead of this solid fuel, carbonic oxide gas may be employed, or the tarlike or
pitchy residue obtained by distilling any organic matter as long as it is free
from sulphur.
If heat is applied for several hours, the oxides of iron will form into wholly
deoxydized iron. The excess of the gases generated in the retort by combination
of the carbon with the oxygen of the residue, may be used for the deoxydation of
another portion of residue or other desired purpose. The generation of carbonic
oxide gas having quite ceased, the reduced metal is withdrawn into a hermetically
sealed receptacle, and put aside in order to cool.
When cool the solid pieces of charcoal or coke contained in the reduced mass,
may be picked out and any ashes conveyed away by blast.
The metal is then passed through a sieve, separating the lumps, which must be
crushed.
The reduced metal, both the crushed lumps and the sieved portion, are then fit
for use in producing amine bases without further treatment.
DDAMIGA TY
CAD,
97, Newgate Street, London, E.C.
COMPLETE SPECIFICATION.
Improvements in the Recovery of Iron from the Ferruginous
Residue left in the Production of Amine Bases.
I SAMUEL SIDNEY BROMHEAD, 97 Newgate Street, London, in the County of
Middlesex, Patent Agent, (communication) 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 object of this invention is the reconversion of the ferruginous residue formed

page_text: in the production of amine bases into iron of such a quality that it may at once be
used again for continuing the production of the above bases.
The ferruginous residue which we will suppose to be free from soluble salts, is
placed in a muffle or closed chamber or retort, heated externally to a moderate red
heat and treated with steam in order to destroy the chlorides of iron existing in the
residue. The gaseous hydrochloric acid escapes at the mouth of the retort and is
absorbed by water.
The retort is then heated to a full red heat or a heat near melting point. By
the reaction under the influence of heat of the carbonaceous substances, contained
in the ferruginous residue with the oxides of iron, the residue is converted into a
partially reduced mass containing 30 to 40 per cent. of metallic iron.
In order to effect the complete deoxidation of the oxides of iron, they are covered
with a considerable excess of charcoal or coke beyond what is necessary for mere
reduction.
Instead of this solid fuel carbonic oxide gas may be employed, or the tarlike or
pitchy residue obtained by distilling any organic matter, as long as it is free from
sulphur.
If heat is applied for several hours the oxides of iron will form into wholly
deoxidized iron. The excess of the gases generated in the retort by combination
of the carbon with the oxygen of the residue, may be used for the deozidation of
another portion of residue or for any other desired purpose. The generation of
carbonic oxide gas having quite ceased, the reduced metal is withdrawn into a
hermetically sealed receptacle and put aside in order to cool.
When cool the solid pieces of charcoal or coke contained in the reduced mass,
may be picked out and any ashes conveyed away by blast.
The metal is then passed through a sieve separating the lumps, which must be
crushed..
The reduced metal, both the crushed lumps and the sieved portion, are then fit
for use in producing amine bases without further treatment.
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 :-
Treating ferruginous residue from the production of amine bases, for producing
metallic iron, so that the same can be used immediately for the same purpose. The
process consists in obtaining a spongy mass from the residue, freed from soluble
salts and combined chlorine, at a temperature under the melting point, (about 900°
centigrade). This is effected by means of its own carbonaceous matter and the
said spongy mass being prevented from coming into contact with the atmosphere
there results a complete deoxidation of the iron sponge either through an excess of
carbon, or by means of reducing gases, as herein described and explained.
Dated this 4th day of September 1893.
S. S. BROMHEAD,
97, Newgate Street, E.C., Agent for Applicant.