Manufacture of New Condensation Products, and Colouring Matters.
Year: 1894

page_text: Date of Application, 1st Oct., 1894
Complete Specification 'Left, 10th June, 1895-Accepted, 13th July; 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE ACTIEN GESELLSCHAFT FÜR ANILIN
FABRIKATION, of Berlin, in the Empire of Germany, Chemical Manu-
facturers.]
Manufacture of New Condensation Products, and Colouring Matters.
Derived therefrom.
1, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered Patent
Agent, do hereby declare the nature of this invention to be as follows:
This invention is based on the observation that molecular proportions of the
nitroso compounds of secondary or tertiary amines or their sulpho acids and
of a Bamidonaphthol or its sulpho acids form condensation products, which dye
chromium mordanted' wool grey shades and which, when afterwards treated with
sulphur and fuming sulphuric acid, yield valuable blue colouring matters, capable of
forming with metallic mordants lakes, which dye with beautiful fast blue tints.
The following is given as an example of the manufacture of these colouring
matters!
'
24 kilos. of a ₁ amidonaphthol sulpho acid are dissolved in 6 kilos of
carbonate of soda and 500 litres of water and a solution of 18-6 kilos. of the
hydrochloric salt of nitrosodimethylaniline is added., After some tine a blue black
precipitate is obtained, which when dry is a black powder. It dissolves in soda
lye with a dull red violet colour, which changes into yellow on addition of
hydrochloric acid.
"
Concentrated
yellow colour.
sulphuric acid dissolves the product, forming a solution of red
Wool is dyed with grey tints.
The transformation of this condensation product into the blue dye stuff may be
carried out by heating the product above mentioned for some time with sulphur
and fuming sulphuric acid nt a temperature of about 30° to 70° C.
When the reaction is completed, the whole liquid is poured into water and ice.
The colouring matter is separated by filtration, redissolved, filtered and precipitated
with hydrochloric acid or common salt.
In the process described, for the sulphur may be substituted substances capable
of forming sulphur sesquioxide when used along with fuming sulphuric acid.
Dated this 1st day of October 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of New Condensation Products, and Colouring Matters
Derived therefrom.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered Patent
Agent, do hereby declare the nature of this invention and in what manner the
Price 8d.]
COMPLETE SPECIFICATION.
Manufacture of New Condensation Products, and Colouring Matters
Derived therefrom.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery
Lane, in the County of London, Consulting Engineer and Chartered Patent
Agent, do hereby declare the nature of this invention and in what manner the
Price 8d

page_text: same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention is based on the observation that molecular proportious of the
nitroso compounds of secondary or tertiary amines or their sulpho acids and
of a B amidonaphthol or its sulpho acids form condensation products, which dye
chromium mordanted wool grey shades and which, when afterwards treated with
sulphur and fuming sulphuric acid, yield valuable blue colouring matters, capable of
forming with metallic mordants lakes, which dye with beautiful fast. blue tints.
The following is given as an example of the manufacture of these colouring
matters.
24 kilos. of a B₁ amidonaphthol sulpho acid are dissolved in 6 kilos. of
carbonate of soda and 500 litres of water, and a solution of 18:6 kilos. of the
hydrochloric salt of nitrosodimethylaniline is added. After some time a blue black
precipitate is obtained, which when dry is a black powder. It dissolves in soda
ye with a dull red violet, colour,, which changes into yellow on addition of
hydrochloric acid:
Concentrated
yellow colour.
sulphuric acid dissolves the product, forming a solution of red
Wool is dyed with grey tints.
The transformation of this condensation product into the blue dye-stuff may be
carried out as follows:
10 kg. of the condensation-product; obtained as herein before described and 2 kg.
of flowers of sulphur are dissolved in 100 kg. of fuming sulphuric acid containing
about 23 per cent. of anhydride and heated for from 5 to 6 hours at a temperature
from 40° to 60° C. The whole mixture is then poured into water, the precipitate
separating out is filtered off, re-dissolved in dilute soda solution and freed from
sulphur by subsequent filtration. The colouring matter is precipitated by means
of common salt. It forms a blue crystalline powder, moderately soluble in cold,
more readily in hot water with a violet blue colour and it dyes chromium mordanted
wool a blue shade.
In the process described; for the sulphur may be substituted substances. capable
of forining sulphur sesquioxide when used along with fuming sulphuric acid.
Having now particularly described and ascortained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:
1., The hereinbefore described process for the production of condensation-
products, by the action of molecular proportions of a amidonaphthol or its
sulpho acids upon para-nitroso-derivatives of secondary or tertiary amines.
2. The herein before described process for the transformation of the condensation
products obtained as set forth in the preceding claim into, blue mordant-dyeing
colouring matters. by heating the before mentioned condensation products with
sulphur in the presence of fuming sulphuric acid.
3. As new inanufactures the products produced as set forth in Claims 1 and 2.
Dated this 10th day of June 1895.
ABEL & IMRAY,
Agents for the Applicant.