AN IMPROVED METHOD FOR THE RECOVERY OF SULPHURIC ACID WHEN COMBINED WITH CERTAIN CHEMICAL PRODUCTS.
Year: 1874

page_text: LETTERS PATENT to Thomas Jackson, of Clayton, near Manchester,
in the County of Lancaster, Manufacturing Chemist, for the In-
vention of "AN IMPROVED METHOD FOR THE RECOVERY OF SULPHURIC ACID
WHEN COMBINED WITH CERTAIN CHEMICAL PRODUCTS.'
Sealed the 30th June 1874, and dated the 5th May 1874.

page_text: I have a suitably arranged pan or series of pans or vessels filled with
the sulphuric acid combined with the other acids or benzole or coal tar
oils, then I treat the mixture with any of the oxydising agents named
hereafter, either in their gaseous, liquid, or solid state, or any other state
and at any degree of strength or temperature, and at any time or times
during the process, from the commencement of the operation to the
finishing of the same, and in the pans or glasses or substitutes for the
same, to be worked by heat to the density required. Or the mixture
may be put into the glasses at once, and I add any of the oxydising
agents, either at the commencement of the process or before beginning,
or at any time during the working or at finishing. Or I mix the nitro-
sulphuric and the sulpho-muriatic acids in equal or any other propor-
tion in the pan or vessel, and treat with some of the substances as may
be required upon determining the amount of action that has taken place.
The oxydising agent may be added cither to cold or hot liquor, or in a
gaseous liquid or solid state.
In order to neutralize or destroy the benzole or coal tar oils, and to
recover the sulphuric acid I use all oxydising agents, but prefer to
employ chlorine and all its compounds in any state, all nitrates, all
nitrites, nitric acid, and all permanganates, each separately or jointly in
a liquid, solid, or gaseous state. The proportion of the oxydising agents
will vary in every case, according to the amount of the benzole and coal
tar oils mixed with the acids. The condensation of the nozious vapours
given off in the above processes is effected in the ordinary manner.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Jackson in the Great Seal Patent Office on
the 4th November 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
JACKSON, of Clayton, near Manchester, in the County of Lancaster
Manufacturing Chemist, send greeting.
:
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of May, in the year of our Lord
One thousand eight hundred and seventy-four, in the thirty-seventh year
of Her reign, did, for Herself, Her heirs and successors, give and grant

page_text: unto me, the said Thomas Jackson, Her special licence, that I, the said
Thomas Jackson, my executors, administrators, and assigns, or such others
as I, the said Thomas Jackson, my executors, administrators, and 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 "AN IMPROVED METHOD FOR THE RECOVERY OF SUL-
PHURIC ACID WHEN COMBINED WITH CERTAIN CHEMICAL PRODUCTS," upon the
condition (amongst others) that I, the said Thomas Jackson, my exe-
cutors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and ascer-
tain 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 Thomas Jackson, 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) :-
My Invention consists in recovering and rendering again useful the
sulphuric acid or oil of vitriol when it has been mixed with nitric acid,
muriatic acid, benzole, naphtha, or any other coal tar oils.
or
I have a suitably arranged pan or series of pans or vessels filled with
the sulphuric acid combined with the other acids or benzole or coal tar
oils, then I treat the mixture with any of the oxydising or other agents
named hereafter, either in their gaseous, liquid, or solid state, or any
other state and at any degree of strength or temperature, and at any time
times during the process, from the commencement of the operation to
the finishing of the same, and in the pans or glasses or substitutes for
the same, to be worked by heat to the density required. Or the mixture
may be put into the glasses at once, and I add any of the oxydising
agents, either at the commencement of the process or before beginning,
or at any time during the working or at finishing. Or I mix the nitro-
sulphuric and the sulpho-muriatic acids in equal or any other proportion
in the pan or vessel, and treat with some of the substances as may be
required upon determining the amount of action that has taken place.

page_text: The oxydising agent may be added either to cold or hot liquor, or in a
gaseous, liquid, or solid state.
In order to neutralize or destroy the benzole or coal tar oils, and to
recover the sulphuric acid, I use all oxydising agents, but prefer to
employ chlorine and all its compounds in any state, all nitrates, all nitrites,
nitric acid, and all permanganates, and the sulphate and carbonate of
ammonia, each separately or jointly in a liquid, solid, or gaseous state.
The proportion of the oxydising or other agents will vary in every case,
according to the amount of the benzole and coal tar oils mixed with the
acids. The condensation of the noxious vapours given off in the above 1
processes is effected in the ordinary manner.
Having thus stated the nature and particulars of my Invention I
declare that I claim the modes described for recovering sulphuric acid
when combined with the chemical products above referred to.
In witness whereof, I, the said Thomas Jackson, have hereto
set my hand and seal, this Thirtieth day of October One
thousand eight hundred and seventy-four.