Improvements in the Production of Coloring Matters from Oxy- sulphonates of Napthalin.
Year: 1889

page_text: Date of Application, 11th June, 1889,
..Complete Specification Left, 6th Mar., 1890-Accepted, 12th Apr., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS AND
BRUNING, of Hoechst-am-Maine, in the Empire of Germany, a Company carrying
on business as Chemical Manufacturers.]
Improvements in the Production of Coloring Matters from Oxy-
sulphonates of Napthalin.
I, OLIVER IMRAY of 28 Southampton Buildings, Chancery Lane, in the County of
London, Fellow of the Institute of Patent Agents do hereby declare the nature of this
invention to be as follows:
•
This invention relates to the production of new coloring matters which dye wool
violet, to blue-black shades, by the action of the diazo-azo-compounds formed by
coupling diazosulphonic acids with alpha-naphthylamine and subsequent diazotation
of the products upon the dioxynaphthalindi-sulphonic acid, described in an application
for Letters Patent of even date herewith in neutral alkaline or acetic acid solution.
The following is an example of the manner of carrying out the invention:
COLORING MATTER
PREPARED FROM
ALPHA-DIAZO-NAPHTHALIN-AZO-ORTHO-TOLUO-
SULPHONIC ACID.
20.9 parts by weight of ortho-toluidinsulphonate of sodium are dissolved in 250 parts
by weight of water, to the solution are added 25 parts by weight of hydrochloric acid
After one hour's rest
of 30 per cent. and a solution of 7 parts by weight of nitrite.
a solution of 18 parts by weight of hydrochlorate of alpha-naphthylamine in 450 parts
by weight of water is allowed to flow into it, while it is kept in agitation. The
condensation product forms at once; 24 hours afterwards it is thoroughly cooled and
mixed with a solution of 7 parts by weight of nitrite. After being kept agitated for
a longer time, all the nitrite is used up and the diazotising is completed.
The diazotising may also be produced by converting the product of the condensation
into the sodium salt, dissolving the latter in water just sufficient for effecting solution,
adding 7 parts by weight of nitrite and allowing to flow into it, while it is kept
agitated and cooled, 36 parts by weight of hydrochloric acid.
The diazo compound thus produced is made to act upon a solution of 37 parts by
weight of dioxynaphtalindisulphonic acid in 300 parts by weight of water, kept
alkaline or mixed with 20 parts by weight of acetate of sodium.
For the orthotoluidinesulphonate of sodium mentioned in the above example may
be substituted the equivalent quantity of some other amido sulphonic acid.
The products obtained vary in respect of colour and solubility according to the
components employed. For example, the products prepared from naphthylamine-
sulphonic acids dye shades more blueish and those prepared from polysulphonic acids
are more readily soluble.
Dated this 11th day of June 1889.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Production of Coloring Matters from Oxy-
sulphonates of Naphthalin.
I, OLIVER IMRAY of No. 28 Southampton Buildings Chancery Lane in the County
of London, Fellow of the Institute of Patent Agents do hereby declare the nature of
this invention 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 production of new coloring matters which dye wool
violet to blue-black shades, by the action of the diazo-azo-compounds formed by
coupling diazosulphonic acids with alpha-naphthylamine and subsequent diazotation
of the products upon the dioxynaphthalindisulphonic acid, described in an application
(No. 9642 of 1889) for Letters Patent of even date herewith in neutral alkaline or
acetic acid solution.
The following is an example of the manner of carrying out the invention:
COLORING MATTER
PREPARED FROM ALPHA-DIAZO-NAPHTHALIN-AZO-ORTHO-TOLUOL-
SULPHONIO AOID.
20.9 parts by weight of ortho-toluidinsulphonate of sodium are dissolved in 250 parts
by weight of water, to the solution are added 25 parts by weight of hydrochloric acid
of 30 per cent, and a solution of 7 parts by weight of sodium nitrite. After one hour's
rest a solution of 18 parts by weight of hydrochlorate of alpha-naphthylamine in
450 parts by weight of water is allowed to flow into it, while it is kept in agitation.
The condensation product forms at once; 24 hours afterwards it is thoroughly cooled
and mixed with a solution of 7 parts by weight of sodium nitrite. After being
kept agitated for a longer time, all the nitrite is used up and the diazotising is
completed.
The diazotising may also be produced by converting the product of the condensation
into a sodium salt, dissolving the latter in water just sufficient for effecting solution,
adding 7 parts by weight of sodium nitrite and allowing to flow into it, while it is
kept agitated and cooled, 36 parts by weight of hydrochloric acid.
The diazo compound thus produced is made to act upon a solution of 37 parts by
weight of dioxynaphthalindisulphonic acid in 300 parts by weight of water, kept
alkaline or mixed with 20 parts by weight of acetate of sodium.
For the orthotoluidinesulphonate of sodium mentioned in the above example may
be substituted the equivalent quantity of some other amido sulphonic acid.
The products obtained vary in respect of colour and solubility according to the
components employed. For example, the products prepared from naphthylamine-
sulphonic acids dye shades more blueish and those prepared from polysulphonic acids
are more readily soluble.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
The production of new colouring matters dyeing wool blue black by combining
dioxynaphthalindisulphonic acid produced in manner described in the Specification
No. 9642 of 1889, with the diazo-azo-compounds obtained by coupling amido-
sulphonic-acids with alpha naphthylamine and subsequently diazotising the products
resulting therefrom, substantially as described.
Dated this Sixth day of March 1890.
ABEL & IMRAY,
Agents for the Applicant.