IMPROVEMENTS IN PREPARING OR OBTAINING COLORING MATTERS
Year: 1863

page_text: LETTERS PATENT to Richard Smith, of. Glasgow, in the County of
Lanark, North Britain, Manufacturing Chemist, for the Invention
737
Sealed the 1st March 1864, and dated the 5th November 1868.
PROVISIONAL SPECIFICATION left by the said Richard Smith, at
the Office of the Commissioners of Patents, with his Petition, on the
5th November 1863.
I, RICHARD SMITH, of Glasgow, in the County of Lanark, North
Britain, Manufacturing Chemist, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN PREPARING OR OBTAINING COLORING MATTERS,'
to be as follows:-
This Invention comprises improvements in treating coloring matters such as
are obtained by the processes described in the Specification of Letters Patent
granted to the present applicant, and dated 11th of August 1860, No. 1945,
and obtaining new coloring matters therefrom.
The products obtained by the earlier processes referred to are magenta,
purple, crimson, and a reddish mauve, and the first improvement relates to the
purple which is of a shade similar to that known as "regina purple." This
purple, after being purified in the usual way, is heated in the dry state with a
combination or mixture of aniline and salicylic acid to a temperature of
about 360 degrees Fahrenheit, until a violet coloring matter is obtained,

page_text: which is purified with weak acids. In this process about one part of the purple
should be used with one part of aniline and an eighth to a sixth part of salicylic
acid.
The second improvement consists in heating the crimson or magenta
herein-before referred to in the dry state with about half its weight of hydro-
chlorate of aniline until a brown coloring matter is obtained.
The third improvement consists in obtaining violet coloring matters by
heating together to a temperature of about 380 degrees Fahrenheit, about
one part of dry magenta with a combination or mixture of about one part of
aniline and about one-eighth to one-sixth part of salicylic acid, or with a com-
bination or mixture of about one-fourth part of salicylic acid, and about two
parts of the basic oil or oils obtained from coal tar, and boiling at a lower
temperature than aniline, or with a combination or mixture of about one and
a third parts of carbolic acid, and one-third part of salicylic acid, the carbolic
acid being saturated or not with ammonia.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Richard Smith in the Great Seal Patent Office on
the 2nd March 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
SMITH, of Glasgow, in the County of Lanark, North Britain, Manufacturing
Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Ifer Letters
Patent, bearing date the Fifth day of November, in the year of our
Lord One thousand eight hundred and sixty-three, in the twenty-seventh
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Richard Smith, Her special licence that I, the
said Richard Smith, my executors, administrators, and assigns, or such
others as I, the said Richard Smith, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to time
and 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 PREPARING OR OBTAINING COLORING MATTERS,"
upon the condition (amongst others) that I, the said Richard Smith, 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 ascertain the
nature of the said Invention, and in what manner the same was to be per-

page_text: formed, 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 Richard Smith, 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 comprises improvements in treating coloring matters
such as are obtained by the processes described in the Specification of Letters
Patent granted to me, and dated 11th August 1860, (No. 1945), and
obtaining new coloring matters therefrom.
The products obtained by my earlier processes referred to are magenta,
purple, crimson, and a reddish mauve, and the first improvement comprised
in my present Invention relates to the purple, which is of a shade similar to
that known as "regina purple." This purple, after it has been purified in
the usual way, I heat in the dry state with a combination or mixture of
aniline and salicylic acid to a temperature of about 360 degrees Fahren-
beit, until a violet coloring matter is obtained, which I purify with weak
acids.
My second improvement consists in heating the crimson or magenta
herein-before referred to in the dry state with about half its weight of hydro-
chlorate of aniline until a brown coloring matter is obtained.
My third improvement consists in obtaining violet coloring matters by
heating together to a temperature of about 380 degrees Fahrenheit, about one
part of dry magenta, with a combination or mixture of about one part of
aniline, and about one-eighth to one-sixth part of salicylic acid, or with a
combination or mixture of about one-fourth part of salicylic acid, and
about two parts of the basic oil or oils obtained from coal tar, and which
boil at a lower temperature than aniline, or with a combination or mixture
of about one and a third parts of carbolic acid, and one-third part of salicylic
acid, the carbolic acid being saturated or not with ammonia. The word
aniline herein contained is intended to include such homologues of aniline
proper as may act similarly in the combinations herein-before described.
Having thus particularly described my said Invention, and the manner in
which the same is or may be performed, I have to state that I do not restrict
myself to the precise proportions herein-before detailed, but that what I claim,
as the Invention secured to me by the herein-before in part recited Letters
Patent is,

page_text: 1. The obtaining of violet coloring matters by combining aniline purple with
aniline and salicylic acid.
2. The obtaining of brown coloring matters by combining the crimson
or magenta obtained under my Patent No. 1945, 1860, with hydrochlorate
of aniline.
3. The obtaining of violet coloring matters by combining magenta with
aniline and salicylic acid, with salicylic acid and basic coal-tar oil, or with
carbolic acid and salicylic acid.
In witness whereof, I, the said Richard Smith, have hereunto set
my hand and seal, this Twenty-fourth day of February, in the year of
our Lord One thousand eight hundred and sixty-four.
Witness,
EDMUND HUNT,
Patent Agent,
28, St. Enoch Square,
Glasgow.
RICHARD SMITH. (L.S.)