IMPROVEMENTS IN THE MANUFACTURE OF BARYTA (OXYD OF BARIUM).
Year: 1881

page_text: LETTERS PATENT to William Edward Gedge, of No. 11, Wellington Street,
Strand, London, in the County of Middlosox, Patent Agent, for an Invention
of "IMPROVEMENTS IN THE MANUFACTURE OF BARYTA (OXYD OF BARIUM)."
.A communication from abroad by Edme Jules Maumené, of Lyons, Department
of the Rhône, France, Chemist.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge at
the Office of the Commissioners of Patents on the 14th June 1881.
WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand, London, in the
County of Middlesex, Patent Agent. "IMPROVEMENTS IN THE MANUFACTURE
OF BARYTA (OXYD OF BARIUM)." A communication from abroad by Edme Jules
Maumené, of Lyons, Department of the Rhône, France, Chemist.
This Invention relates to a new or improved process of manufacturing baryta
(oxyd of barium).
Natural or artificial sulphate of baryta mixed in fine powder with ses-qui-oxyd of
iron, also in fine powder, in the proportion of,—
116 kilogrammes, 5 grammes of sulphate,
80 kilogrammes of oxyd (manufactured or from ore),
gives a compound Fe³ Õ³ Ba O, and loses all its acid in SO + O when the mixture
is submitted to a temperature of 1000 to 1200°, the two gases are collected and
changed into sulphuric acid.
The compound cannot be attacked, or but very slightly by water, even boiling.
A very long time is required for the extraction of hydrated baryta.
But if Fe Os Ba O is exposed in a suitable earthenware or iron apparatus to the
action of hydrogen gas at a red heat, the equation
•
FeO3 Bn O+ 3H = Fe* + 3 HO + Ba O.
[A] is realized.
Which gives a remainder Fo² + Ba O, in which the Ba O is no longer retained
by a chemical influence, and may be obtained free by the action of boiling
water.
Other oxyds may act with the sulphate almost in the same way as sesquioxyd of
D

page_text: iron, but they are less advantageous as regards economy. I may however mention
that oxyd of copper may be used.
It is clear that the compounds, the decomposition of which by heat leaves oxyds,
for example, carbonato of iron and salts of the same class, lead to the same results,
and are included in this Invention. Instead of sulphate of baryta the carbonato
may be used for the same objects.
To more clearly set forth this Invention I deem it desirable to add to the main
description that which follows.
Sulphate and carbonate of baryta, natural or artificial, are not the only useful
compounds for obtaining the body Fe2O3 Ba O. All the salts of baryta, all the
compounds of barium which oxyd of iron may change into Fe² O³ Ba O by
disengaging the other parts of these compounds in the state of vapor, or by a kind
of liquation, may be used in applying the fundamental action formning the basis of
this Invention.
For example, Ba S, the sulphuret of barium, which gives when heated with
Fe O a total action
3 Ba S+ Fe2O3 = 3 Ba O + Fe² S³
[B],
an action which leaves at a bright red heat a Feª S³, more or less isolated, more or
less decomposed, according to the fierceness of the fire.
This sulphuret Fe S reproduces, by roasting, Fe 0³, suitable for decomposing a
fresh quantity of Ba O SO³ and of the utilizable SO².
This Invention also includos another application of the Ba S.
When the Fe Os of the compound Fe² Os Ba O has been reduced by hydrogen the
product of the mixture Fe² + Ba O may be treated
Either by dry way in a current of steam;
Or by humid way in its generality
With 2 Ba S to obtain the transformation
Fe + Ba O + 2 Ba S + 2 HO = 3 Ba O + 2 Fe S + 2 H
The baryta is thus obtained by a mixed process,-
•
•
[E].
1°. Production of Ba O Fe² O by the means indicated followed by a reduction
by 3 H.
2º. Action of 2 Bn S (obtained by sulphate of baryta and charcoal) in conformity
with the equation [E].
There is thus obtained 3 Ba O, only one third of which requires to be reduced by
hydrogen, which may in some cases prove economical.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Edward Gedgo in the Great Seal Patent Office on the
5th December 1881.
WILLIAM EDWARD GEDGE, of No. 11, Wellington Street, Strand, London, in the
County of Middlesex, Patent Agent. " IMPROVEMENTS IN THE MANUFACTURE
OF BARYTA (OXYDE OF BARIUM)." A communication from abroad by Edme Jules
Maumené, of Lyons, Department of the Rhône, France, Chemist.
This Invention relates to a new or improved process of manufacturing baryta
(oxyde of barium).
Natural or artificial sulphate of baryta mixed in fine powder with sesquioxyd of
iron, also in fine powder, in the proportion of
116 kilogrammes, 5 grammes of sulphate, say, 255 lbs. 0 oz. 3 dramis avoirdupois.
80 kilogrammes of oxyd (manufacture or from ore), say, 176 lbs. 4 oz. avoirdupois,
gives a compound Fe² 0³ Ba O, and loses all its acid in SO2 + O when the mixture
is submitted to a temperature of 1000 to 1200° "centigrade "the two gases are
collected and changed into sulphuric acid.
The compound cannot be attacked, or but very slightly by water, even boiling.
A very long time is required for the extraction of hydrated baryta therefrom.
But if Fe 03 Ba O is exposed in a suitable earthenware or iron apparatus to the
action of hydrogen gas at a red heat, the equation
•
•
•
Fo 03 Ba O + 3 H = Fo² + 3 HO + Ba O
[A] is realised.
Which gives a remainder Fe² + Ba O, in which the Ba O is no longer retained
by a chemical influence, and may be obtained free by the action of boiling water.
Other oxyds may act with the sulphate almost in the same way as sesquioxyd
of iron, but they are less advantageous as regards economy.
I may however mention that oxyd of copper may be used.
It is clear that the compounds, the decomposition of which by heat leaves oxyds,
for example, carbonate of iron and salts of the same kind, lead to the saine results,
and are included in this Invention.
Instead of sulphate of baryta the carbonate may be used for the same objects.
To more clearly set forth this Invention I deem it desirable to add to thỏ main
description that which follows.
Sulphate and carbonate of baryta, natural or artificial, are not the only useful
compounds for obtaining the body Fe2O3 Ba O. All the salts of baryta, all the
compounds of barium which oxyd of iron may change into Fe 0³ Ba O by
disengaging the other parts of these compounds in the state of vapor, or by a kind
of liquation, may be used in applying the fundamental action forming the basis of
this Invention.
For example, Ba S, the sulphuret of barium, which gives when heated with Fe² Os
a total action
[B],
3 Ba S + Fe 0³ = 3 Ba O + Fe² S³
•
.
an action which leaves at a bright red heat a Fe² S³, more or less decomposed,
according to the fierceness of the fire.
This sulphuret Fe S reproduces, by roasting, Fe 0³, suitable for decomposing a
fresh quantity of Ba O SO³ and of the utilizable SO³.
This Invention also includes another application of the Ba S.
When the Fo² Os of the compound FeÒ³ Ba O has been reduced by hydrogen the
product of the mixture Fe² + Ba O may be treated
Either by dry way in a current of steam;

page_text: The baryta is thus obtained by a mixed process,—
1°. Production of Ba O Fe² Os by the means indicated, followed by a reduction
by 3 H.
2º. Action of 2 Ba S (obtained by sulphate of baryta and charcoal) in conformity
with the equation [E].
There is thus obtained 3 Ba O, only one third of which requires to be reduced by
hydrogen, which may in some cases prove economical.
Having now described and ascertained the nature of the Invention communicated
to me as aforesaid,
I claim as secured to mo by the hereinbefore in part recited Letters Patent,―
The manufacture of baryta (oxyde of barium) by the processes above described,
or other analogous processes.
In witness whereof, I, the said William Edward Gedge, have hereunto set my
hand and seal, this Fifth day of December, in the year of our Lord One
thousand eight hundred and eighty one.
W. E. GEDGE. (L.S.)