IMPROVE- unoMA 152 DRADATION OR SHERRY
Year: 1873

page_text: LETTERS PATENT to Hermann Sprengel, of Gloucester Street, Belgrave
Road, in the County of Middlesex, for the Invention of "IMPROVE-
unoMA 152
DRADATION OR SHERRY"
Sealed the 30th December 1873, and dated the 1st October 1873.
PROVISIONAL SPECIFICATION left by the said Hermann Sprengel at
the Office of the Commissioners of Patents, with his Petition, on
the 1st October 1873.
I, HERMANN SPRENGEL, of Gloucester Street, Belgrave Road, in the
County of Middlesex, do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN THE PRODUCTION OF SULPHURIC ACID," to be as
follows:-
In the production of sulphuric acid as now generally adopted it is
necessary to introduce into the chambers jets of steam in order to effect
the desired combination of the several gases employed for the production
of sulphuric acid.
Now this Invention relates, firstly, to the employment as a substitute
for a jet or jets of steam or in conjunction therewith of water or of

page_text: acidified aqueous solutions, either of sulphuric acid or of nitric acid, the
same being converted by means of jets of steam or by means of jets of
air at an elevated pressure or by any other means into an exceedingly
finely divided condition of the fluid or into spray, such finely divided
condition of the fluids employed acting in a manner similar to steam,
but forming an economical substitute therefor.
One other part of my Invention consists in the employment of sul-
phuric acid in a finely divided condition or spray for effecting the absorp-
tion of the lower oxides of nitrogen contained in or escaping from the
sulphuric acid chambers.
Another part of my Invention relates to the employment of sulphuric
acid containing in solution nitric acid, or the lower oxides of nitrogen or
mixtures of the same in a finely divided condition or spray, so as to
utilize the oxides of nitrogen contained therein for the production of
sulphuric acid in the sulphuric acid chambers.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Hermann Sprengel in the Great Seal Patent Office
on the 1st April 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HERMANN
SPRENGEL, of Gloucester Street, Belgrave Road, in the County of
Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date First day of October, in the year of our
Lord One thousand eight hundred and seventy-three, in the 37th
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Hermann Sprengel, Her special license that I,
the said Hermann Sprengel, my executors, administrators, and assigns,
or such others as I, the said Hermann Sprengel, my executors, admini-
strators, or assigns, should at any time agree with and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for “IMPROVEMENTS IN THE PRO-
DUCTION OF SULPHURIC ACID," upon the condition (amongst others) that I,

page_text: the said Hermann Sprengel, my executors or administrators, by an
instrument in writing under my hand and seal, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Hermann Sprengel, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, that is to say :-
In the production of sulphuric acid as now generally adopted it is
necessary to introduce into the chambers jets of steam in order to effect
the desired combination of the several gases employed for the production
of sulphuric acid.
Now this Invention relates, firstly, to the employment as a substitute
for a jet or jets of steam, and employed in a manner similar thereto or in
conjunction therewith of water or of acidified aqueous solutions either of
sulphuric acid or of nitric acid, the same being converted by means of.
jets of steam, or by means of jets of air at an elevated pressure or by any
other means into an exceeding finely divided condition of the fluid, or
into spray, such finely divided condition of the fluids employed acting in
a manner similar to steam as now employed, but forming an economical
substitute therefor.
One other part of my Invention consists in the employment of
sulphuric acid in a finely divided condition or as spray for effecting the
absorption of the oxides of nitrogen, which are capable of absorption and
which are contained in or which escape from the sulphuric acid
chambers.
-
Another part of my Invention relates to the employment of sulphuric
acid containing in solution cither nitric acid or those oxides of nitrogen
which are capable of absorption by sulphuric acid or mixtures of the
same in a finely divided condition or as spray, so as to utilize the oxides
of nitrogen contained therein for the production of sulphuric acid in the
sulphuric acid or leaden chamber.
In carrying out the first part of my Invention I employ leaden
chambers constructed in a manner similar to those now employed, or with
such modifications as may be found in practice to be necessary, and I

page_text: cause the aqueous or acid spray produced by any known means to be
introduced in or about the same portions or parts of the chamber into
which steam is now introduced, and which spray is to be injected in such
proportion as that the combination of the gases may be effected, and
sulphuric acid be produced.
In carrying out the second part of my Invention I effect the pro-
duction of a sulphuric acid spray by any known means for producing
spray, and employ such spray for effecting the absorption of the nitrous
fumes or oxides of nitrogen, by causing the acid spray to come in contact
with the gaseous products escaping from the leaden chambers, such gases
being made to pass through suitable chambers into which the sulphuric
acid spray is injected, and which chambers are furnised with the
necessary inlets and outlets, and such exit pipes as may be necessary for
the carrying off of the condensed or liquid acid.
In carrying out the third part of my Invention, sulphuric acid con-
taining the absorbed nitrous fumes or oxides of nitrogen from the leaden
chambers is introduced into the leaden chambers in the form of spray,
and by preference at or about the same part or portion of the chamber
into which the gases enter from the so called kilns, videlicet, apparatus
in which the burning of sulphur of pyrites or of other sulphur material
is effected.
What I wish to be understood by the term spray is the employment of
water or of acid in a fine state of division, or what is known as being in
a vesicular or pulverized form, videlicet, in a form similar to that of mist,
which may be obtained either by the injection of steam or of air into a
flow or a jet of water or of the acids herein referred to, or by the
impinging or coming in contact under pressure of converging jets of
water or of acid, or which may be produced by any other means.
Having now described and particularly ascertained the nature of my
said Invention, and the manner in which the same is, or may be used,
or carried into effect, I would observe in conclusion that what I consider
to be novel and original and therefore claim as the Invention secured to
me by the herein-before in part recited Letters Patent is,-
Firstly. The employment as a substitute for a jet or jets of steam or in
conjunction therewith of water or of acidified aqueous solutions, either
of sulphuric acid or of so-called chamber acid, or of nitric acid, the same

page_text: being converted by means of jets of steam or by means of jets of air at
an elevated pressure or by any other means into an exceedingly finely
divided condition of the fluid or into spray, such finely divided condition
of the fluids employed acting in a manner similar to steam as now
employed, but forming an economical substitute therefor.
Secondly. The employment of sulphuric acid in a finely divided con-
dition or spray for effecting the absorption of the oxides of nitrogen
contained in the gases escaping from the sulphuric acid or leaden
chambers.
Thirdly. The employment in the leaden chambers of sulphuric acid
containing in solution the absorbed oxides of nitrogen in a finely divided
condition or spray, so as to reutilize the oxides of nitrogen contained
therein for the production of sulphuric acid.
In witness whereof, I, the said Hermann Sprengel, have to this
my Specification set my hand and seal, the Nineteenth day of
March, One thousand eight hundred and seventy-four..
TLDMANN ODDENCET