The Manufacture and Production of New Mordant Dyeing Colouring Matters.
Year: 1894

page_text: Date of Application, 17th Feb., 1894
Complete Specification Left, 1st Nov., 1894-Accepted, 1st Dec., 1894
PROVISIONAL SPECIFICATION.
The Manufacture and Production of New Mordant Dyeing Colouring
Matters.
I JAMES YATE JOHNSON of 47 Lincoln's 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:-
This invention relates to the manufacture of new colouring matters, which fix
themselves on the metallic mordants giving very fast shades of colour. The said
colouring matters are obtained by the condensation of gallic acid with alkylated
aromatic amines under the influence of suitable reagents such for example as the
chlorides and oxychlorides of phosphorous with, or without the addition of zinc
chloride and the like.
The following example will serve to further illustrate the nature of the invention
but it merely describes its application in one typical case and in all cases the method
of proceeding can be varied. The parts are by weight.
Example. Mix about ten parts of gallic acid with about forty parts of
dimethyl-aniline in an enamelled vessel fitted with a stirrer. These compounds
should both be free from water. Next run in about forty parts of phosphorous
oxychloride. The mixture becomes hot spontaneously and a violent reaction takes
place. When this has somewhat subsided add slowly about forty parts of chloride
Then dilute
of zinc, and continue stirring until the frothing of the mixture ceases.
the melt carefully with about two hundred parts of water and pour the whole into
about one thousand parts of water. Add sodium acetate, filter off the dye, which
is obtained as a dark precipitate, wash and preserve for use in the form of paste.
The dye thus obtained gives very bright blue shades, fast against the action of
light, on chrome mordanted wool..
Diethyl-aniline can be used instead of dimethyl-aniline.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
The Manufacture and Production of New Mordant Dyeing Colouring
Matters.
I, JAMES YATE JOHNSON of No. 47 Lincoln's Inn Fields in the County of
London 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) and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement:-
This invention relates to the manufacture of new colouring matters which fix
themselves on the metallic mordants giving very fast shades of colour. The said
colouring matters are obtained by the condensation of gallic acid with an alkylated
aromatic amine (either dimethyl aniline, or diethyl-aniline) under the influence of
suitable reagents namely the chlorides and oxychlorides of phosphorus with or
without the addition of zinc chloride.

page_text: The following example will serve to further illustrate the vature of the invention
but it merely describes its application in one typical case and in all cases the method
of proceeding can be varied. The parts are by weight.
Example. Mix about ten parts of gallic acid with about forty parts of
dimethylaniline in an enamelled vessel fitted with a stirrer. The compounds
should both be free from water. Next run in about forty parts of phosphorus
oxychloride. The mixture becomes hot spontaneously and a violent reaction takes
place. When this has somewhat subsided add slowly about forty parts of chloride
of zinc, and continue stirring until the frothing of the mixture ceases.
dilute the melt, carefully with about two hundred parts of water and pour the
whole into about one thousand parts of water. Add sodium acetate, filter off the
dye which is obtained as a dark precipitate, wash and preserve for use in the form
of paste.
Then
The dye thus obtained gives very bright blue shades fast against the action of
light, on chrome-mordanted wool.
The addition of chloride of zinc in the above example can be omitted.
In place of dimethylaniline in the above example diethylaniline can be similarly
used.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. The manufacture of new mordant dyeing colouring matters by the condensation
of gallic acid with a dialkylated aromatic amine hereinbefore named substantially as
hereinbefore described.
2. The manufacture of the new mordant dyeing colouring matters in the manner
herein described in the example.
3. As new articles of manufacture the new mordant dyeing colouring matters
such as can be obtained substantially as hereinbefore described.
Dated this 1st day of November 1894.
JOHNSONS & WILLCOX,
Agents.