IMPROVEMENTS IN THE MANUFACTURE OF CERTAIN COAL TAR PRODUCTS
Year: 1869

page_text: LETTERS PATENT to John Rowley, of No. 77, Wells Street, Cam-
berwell, in the County of Surrey, Chemist, for the Invention of
"IMPROVEMENTS IN THE MANUFACTURE OF CERTAIN COAL TAR PRODUCTS."
Scaled the 18th January 1870, and dated the 22nd July 1869.
PROVISIONAL SPECIFICATION left by the said John Rowley at the
Office of the Commissioners of Patents, with his Petition, on the
22nd July 1869.
I, JOHN ROWLEY, of No. 77, Wells Street, Camberwell, in the County
of Surrey, Chemist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE MANUFACTURE OF CERTAIN COAL TAR PRODUCTS," to
be as follows:-
I treat the creosote or napthaline as obtained by the distillation of
coal tar with chlorine gas till it is fully saturated; this in conjunction
with coal tar naptha I distil, and obtain benzole and other homologous
products, from which aniline for dyes can be made by the usual known
methods.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Rowley in the Great Seal Patent Office on
the 19th January 1870..
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ROWLEY, of 77, Wells Street, Camberwell, in the County of Surrey,
Manufacturing Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of July, in the year
of our Lord One thousand eight hundred and sixty-nine, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said John Rowley, Her special licence that I,
the said John Rowley, my executors, administrators, and assigns, or
such others as I, the said John Rowley, 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 IMPROVEMENT IN THE MANUFACTURE OF COAL
TAB PRODUCTS," upon the condition (amongst others) that I, the said John
Rowley, 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 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 John Rowley, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
By the method of obtaining naptha containing benzole by the dis-
tillation of gas tar hitherto in ordinary use there are other products
obtained, which are known as creosote and napthaline, and which
hitherto have not been available for the production of benzole, and
the object of my Invention is to use and treat these bodies in the
manner herein-after described so as to produce benzole or other homo.
logous products.

page_text: I take creosote or napthaline, and well saturate the creosote or the
napthaline with chlorine gas; this I then distil, and after getting away
the oil a fatty matter comes over, which I employ as herein-after
described. I take the naptha obtained by the distillation of gas tar
and treat it with sulphuric acid, employing from 30 to 40 per cent. by
weight of acid with the naptha. I well agitate the mixture for about 2
or 3 days for the purpose of getting away any tar and pitch. I then put
in the requisite quantity of soda to neutralise the acid and then let it
settle, whereby the naptha becomes more purified. I then draw off the
naptha and put it in a still, to which I add from 10 to 25 per cent. of
the fatty matter obtained from the creosote or napthaline, as above
mentioned. I then distil in the usual way, and so I obtain benzole
or other homologous products from which aniline dyes can be made.
I do not confine myself to obtain the fatty matter by distillation, as it
can be obtained by pressing or filtration; I however prefer distillation.
Having now described my Invention, I wish it to be understood
that I claim, the manufacture of benzole or other homologous products
from creosote or napthaline in the manner substantially as herein set
forth.
In witness whereof, I, the said John Rowley, have hereunto set my
hand and seal, this Seventeenth day of January, in the year of
our Lord One thousand eight hundred and seventy.
Signed, sealed, and delivered
by the within-named John
Rowley, in the presence
of
FRED. BRADLEY,
Solicitor,
75, Mark Lane,
London.
JOHN ROWLEY. (L.S.)