Year: 1887

page_text: Date of Application, 22nd Apr., 1887.
Complete Left, 18th Jan., 1888
Complete Accepted, 24th Feb., 1888.
Hydrogen.
We EDWARD WILLIAM PARNELL and JAMES SIMPSON of 8 Rumford Place,
Liverpool, in the County of Lancaster, Manufacturing Chemists do hereby declare
the nature of this invention to be as follows:-
In the manufacture of Alkalies by the process or processes patented by us under
British Patents Nos. 381, 1937, and 8440 of the year 1885, and 47 of the year 1886,
in which Ammonia in the form of Sulphuret is employed in place of the Ammonia
ordinarily used in the Ammonia Alkali process it may happen that in certain localities
a supply of Leblanc Alkali Waste may not be available while Sulphate of Lime
commonly known as Gypsum or Sulphate of Baryta commonly known as heavy spar
may be obtainable at a trifling cost.
The object of our invention is to treat gypsum or Sulphate of Baryta so as to
render either of them available as a substitute for Leblanc Alkali Waste in making
Alkali and sulphuretted hydrogen in the manner set forth in the Patents aforesaid.
For the above purpose we convert the Sulphate of Lime or Sulphate of Baryta
into its respective Sulphuret by the well known method of roasting with a quantity
of slack or other carbonaceous matter in a suitable furnace, and afterwards employ.
the said sulphuret substantially in the same manner as Alkali Waste for the
decomposition of chloride of ammonium as set forth in the Specifications to the
above mentioned patents.
In practice we grind the gypsum or baryta to about the size of marbles and mix it
with about one third of its weight of slack or other fine carbonaceous matter-Wo
then subject the mixture to a roasting temperature in a furnace constructed so that

page_text: the material operated on shall not be exposed to an oxidising atmosphere. During
this operation or treatment the charge is agitated by any convenient means in
order that there may be intimate contact between the Gypsum or Baryta and the
slack.
By this means the Sulphate of Lime or Sulphate of Baryta is reduced to Sulphuret
as before stated.
In practice an ordinary reverbatory furnace will answer. The fineness or state of
subdivision of the Gypsum or Baryta and slack may be varied according to the quality
of the material and the construction of the furnace employed.
Deal thi CA: 1007
J. T. KING,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Utilization of Sulphate of Lime and Sulphate
of Baryta in the Manufacture of Alkalies and Sulphuretted
Hydrogen.
We EDWARD WILLIAM PARNELL and JAMES SIMPSON of 8 Rumford Place
Liverpool in the county of Lancaster Manufacturing Chemists 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 Alkalies by the process or processes patented by us under
British patents No. 381, 1937 and 8440 of the year 1885 and 47 of the year 1886 in
which Ammonin in the form of Sulphuret is employed in the place of Ammonia
ordinarily used in the Ammonia Alkali process it may happen that in certain localities
a supply of Le Blanc Alkali Waste may not be available while Sulphate of Limo
commonly known as Gypsum, or Sulphate of Baryta commonly known as heavy spar
may be obtainable at a trifling cost. The object of our invention is to treat gypsum
or Sulphate of Baryta so as to render either of them available as a substitute for
Le Blanc Alkali Wasto in making Alkali and sulphuretted hydrogen in the manner
set forth in the patents aforesaid.
For the above purpose we convert the sulphate of Limo or sulphato of Baryta, into
its respectivo sulphuret by the well. known method of roasting with a quantity of
slack or other carbonaceous matter in a suitable furnace and afterwards employ the
said sulphuret substantially in the same manner as Alkali Waste for the decomposition
of chloride of ammonium as set forth in the specifications to the above mentioned
patents.
In practice we grind the Gypsum or baryta to about the size of marbles and mix it
with about one third of its weight of slack or other fine carbonaceous matter-Wo
then subject the mixture to a roasting temperature in a furnace constructed so that
the material operated on shall not be exposed to an oxidising atmosphere-During
this operation or treatment the charge is agitated by any convenient means in order
that there may be intimate contact between the Gypsum or Barytes and the Slack.
By this means the Sulphate of Lime or Sulphate of Baryta is reduced to Sulphuret
as boforo stated.
In practice an ordinary reverbatory furnace will answer but we prefer a revolving
Black Ash furnace with doors or openings, at the ends to enable the charge to be
raked out The fineness or state of subdivision of Gypsum or Baryta and Slack may
be varied according to the quality of the material and the construction of the furnace
employed.

page_text: Having now particularly described and ascertained the nature of the said invention
and in what mannor the same is to he performed we wish it to be distinctly understood
that we do not claim the conversion or reduction of Sulphate of Lime or Sulphate
of Baryta to Sulphuret by roasting it with carbonaceous matter nor do we claim any
particular form of furnace for effecting the conversion or reduction but we declare
that what we do claim is
First The employment of Sulphuret of calcium or sulphuret of barium made by
roasting sulphate of lime or sulphate of baryta with carbonaceous matter for
decomposing the chloride of ammonium produced in tho Ammonia Alkali process.
Second-The combination of the method above described for the manufacture of 1
Sulphuret of Calcium or Sulphuret of Barium with the manufacture of Alkali by
the treatment of a Sulpho-ammonical Solution of Brine with Carbonic acid gas.
T
1900