IMPROVEMENTS IN TREATING MINERAL OILS."
Year: 1870

page_text: LETTERS PATENT to James Edward Duyck, of Glasgow, in the County
of Lanark, North Britain, for the Invention of "IMPROVEMENTS IN
TREATING MINERAL OILS."
PROVISIONAL SPECIFICATION left by the said James Edward Duyck
at the Office of the Commissioners of Patents, with his Petition,
on the 20th July 1870.
I, JAMES EDWARD DUYCK, of Glasgow, in the County of Lanark,
North Britain, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN TREATING MINERAL OILS," to be as follows :-
This Invention has for its object the removing of the objectionable
blueness, cloudiness, or apparent turbidity which occurs in various
mineral oils, and consists in adding to the mineral oil a substance of the
class known as nitro-compounds, and obtained by treating hydrocarbons
with nitric acid. Nitro-benzole is the substance of this class which it is
preferred to use, and the commercial quality of it answers the purpose.
The proportion of nitro-benzole to be employed will vary with the
quality and condition of the mineral oil, but in ordinary cases from one
to five per centum is sufficient.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Edward Duyck in the Great Seal Patent
Office on the 19th January 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
EDWARD DUYCK, of Glasgow, in the County of Lanark, North Britain,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of July, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said James Edward Duyck, Her special
licence that I, the said James Edward Duyck, my executors, adminis-
trators and assigns, or such others as I, the said James Edward Duyck,
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 "IM-
PROVEMENTS IN TREATING MINERAL OILS," upon the condition (amongst others)
that I, the said James Edward Duyck, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, 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 Scal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said James Edward Duyck, 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 in writing, that is to say :-
My said Invention has for its object the removing of the objectionable
bluenesss, cloudiness, or apparent turbidity which occurs in various
mineral oils, and it consists in adding to the mineral oil a substance
which is soluble in or miscible with the oil and of the class known as nitro-
compounds, and obtained by treating hydrocarbons with nitric acid.
Nitro-benzole is the substance of this class which I use, and I find that
the commercial quality of it which generally also contains other nitro-

page_text: compounds, answers the purpose. The proportion of nitro-benzole to be
employed in each case will vary with the quality and condition of the
mineral oil, in other words, with the more or less purified or refined
state of the oil and with the amount of blueness present. I prefer to
treat with the nitro-benzole the crude mineral oil prior to the redistilla-
tions which it undergoes in the refining process; and in that case when
the oil is ready to go to the still I add to it from one half to four
per centum by weight or measure of the nitro-benzole, and have the
whole well mixed before distilling. The nitro-benzole may, however, be
added at any stage and to any of the varieties of the oil, such as naphtha,
burning oil, intermediate or bastard oil, lubricating oil, or heavy oil,
whenever they exhibit the blueness or cloudiness; and in the case of an
otherwise finished oil minute quantities of the nitro-benzole may be
mixed in until inspection shows that the blueness is removed, from one
half to two per centum being in general what is required in practice.
Having thus particularly described my said Invention, and the manner
in which the same is to be performed, I have to state that I do not restrict
myself to the precise details herein-before described, but that what I
believe to be novel and original and claim as the Invention secured to
me by the hercin-before in part recited Letters Patent is, the treating of
mineral oils with a nitro-compound, such as nitro-benzole, in order to
remove blúeness, as herein-before described.
In witness whereof, I, the said James Edward Duyck, have here-
unto set my hand and seal, this Sixteenth day of January, in
the year of our Lord One thousand eight hundred and seventy-
one.
Witness,
EDMUND HUNT,
87, St. Vincent Street,
Glasgow.
J. E. DUYCK. (L.S.)