Colouring Matter of the Oxyketone Group suitable for Dyeing and Printing with the Aid of Mordants.
Year: 1889

page_text: Date of Application, 6th June, 1889
Complete Specification Left, 17th Feb., 1890-Accepted, 19th Apr., 1890
PROVISIONAL SPECIFICATION.
Colouring Matter of the Oxyketone Group suitable for Dyeing and
Printing with the Aid of Mordants.
I, JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been
communicated to me from abroad by The Badische Anilin and Soda Fabrik of
Ludwigshafen-on-Rhine in the Empire of Germany to be as follows:-
In my application for Letters Patent No. 8373 dated 20th May 1889 the production
of colouring matters is described which according to their chemical constitution are
oxygenated derivatives of either acetophenone or of benzophenone or of homologues
and substitution compounds thereof.
Now my foreign Correspondents have found that by the application of the methods
set forth in my above Specification similar colouring matters may be produced which
according to their chemical constitution are oxygenated derivatives of analogues of
benzophenone. Thus for instance the production of a tetraoxyphenylnaphthyl-
ketone may be effected by the condensation of equal molecules of gallic acid and
alpha-naphthol.´
The oxyketone thus obtained crystallises from its solution in diluted alcohol in
compact prisms not fusible at 200 degrees Centigrade. It dyes a greenish yellow
colour upon cotton which has received an alumina-mordant whilst upon chrome-
mordanted wool fine brownish-yellow shades can be obtained.
Dated this 5th day of Tune 1000.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, W.C., Agents.
COMPLETE SPECIFICATION.
Colouring Matter of the Oxyketone Group suitable for Dyeing and
Printing with the Aid of Mordants.
1 JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention (which has been
communicated to me from abroad by The Badische Anilin and Soda Fabrik of
Ludwigshafen on the Rhine in the Empire of Germany) and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement:-
In the Specification of my application for Letters Patent No. 8373 dated 20th May
1889 the production of certain colouring matters is described which according to
their chemical constitution are oxygenated derivatives of either acetophenone or of
benzophenone or of certain homologues or substitution compounds thererof.
Now my foreign Correspondents have found that by the application of the methods
set forth in the above named Specification a similar colouring matter may be produced
which is according to its chemical constitution an oxygenated derivative of an
analogue of benzophenone. The said colouring matter is chemically tetraoxyphenyl-
naphthylketone and it results from the condensation of equal molecules of gallic acid
and alpha-naphthol. It may be prepared in accordance with the following directions
which constitute an example of the manner in which the said Invention can be
carried into effect.
About one hundred parts by weight of gallic acid are dissolved in about four
hundred parts by weight of alpha-naphthol at a temperature of about 230° C. and to
the solution thus obtained about four parts by weight of chloride of zinc are slowly
and carefully added. An energetic reaction takes place, and after this has ceased the

page_text: mass is allowed to cool down to (or about) 100° Centigrade when the excess of alpha-
naphthol is extracted with benzene. The dyestuff formed remains undissolved by the
benzene and is dissolved in alcohol and the solution (after previous filtration if
necessary) is poured into water whereupon the colouring matter separates out in the
form of yellow green scales which may be collected on a filter pressed and dried or be
preserved in the form of paste.
The dried crystals obtained as above described do not fuse below 200° Centigrade.
The colouring matter dyes cotton which has received an alumina mordant a
greenish yellow colour whilst upon chrome mordanted wool fine brownish yellow
shades can be obtained.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is
As a new article of manufacture the hereinbefore described colouring matter named
tetraoxyphenylnaphthylketone.