IMPROVEMENTS IN THE PRODUCTION OF COLOURING MATTERS SUITABLE FOR DYEING AND PRINTING to be as follows:
Year: 1884

page_text: I, JOHN ERSKINE of 151 St Vincent Street Glasgow in the County of Lanark
North Britain, Solicitor," do hereby declare the nature of the said invention for
"IMPROVEMENTS IN THE PRODUCTION OF COLOURING MATTERS SUITABLE FOR
DYEING AND PRINTING to be as follows:-
"
This Invention relates to a new colouring matter which results from the re-action
of Diazo-xylol-azo-benzol-mono-sulphonic acid with the soda salt of alpha-mono-
sulphonic acid of beta-naphthol.--The preparation and properties of alpha-
mono-sulphonic acid of beta naphthol and also of its sodium salt are described
in the Specification of Letters Patent granted to Joseph Anthony Dixon of
175 West George Street Glasgow in the County of Lanark North Britain Solicitor
dated the 21 day of March A.D. 1881, and numbered 1225.
The new colouring matter is prepared as follows:-
100 kilograms of finely powdered amido-xylol-azo-benzol-mono-sulphonic acid
is dissolved in 1000 litres of water.-To this solution there is added 75 kilograms
of hydrochloric acid of 21° Baumé.-The mixture so prepared is cooled to from
3° centigrade to 6° centigrade and then there is poured into it slowly a solution
of 25 kilograms of sodium nitrite in 100 kilograms of water.-The mixture is
then left at rest for several hours when the desired chemical re-action will be
complete, that is to say, the amido-xylol-azo benzol mono-sulphonic acid will
be transformed into the diazo xylol-azo-benzol-mono-sulphonic acid.-The next
operation consists in slowly pouring the mixture containing the diazo-xylol-azo-
benzol-mono-sulphonic acid into a solution of 150 kilograms of the sodium salt of
alpha-inono-sulphonic acid of beta naphthol in 100 kilograms of ammonia of ten
per cent strength.-The new colouring matter is the result of the re-action of the
substances in solution.

page_text: I, JOHN ERSKINE, of 151 Saint Vincent Street, Glasgow, in the County of
Lanark, North Britain, Solicitor do hereby declare the nature of the said invention
for IMPROVEMENTS IN THE PRODUCTION OF COLOURING MATTERS SUITABLE FOR
DYEING AND PRINTING 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 a new colouring matter which results from the reaction
of Diazo-xylol-azo-benzol-mono-sulphonic acid with the soda salt of alpha-mono-
sulphonic acid of beta napthol. The preparation and properties of alpha-
mono-sulphonic acid of beta napthol and also of its sodium salt are described
in the Specification of Letters Patent granted to Joseph Anthony Dixon of
175 West George Street, Glasgow, in the County of Lanark, North Britain,
Solicitor, dated the 21st day of March A.D. 1881 and numbered 1225.
The new colouring matter is prepared as follows:-
100 kilograms of finely powdered amido-xylol-azo-benzol-mono-sulphonic acid
is dissolved in 1000 litres of water. To this solution there is added 75 kilograms
of hydro-chloric acid of 21° Baumé. The mixture, so prepared, is cooled to from
3° centigrade to 6° centigrade and then there is poured into it slowly a solution of
25 kilograms of sodium nitrite in 100 kilograms of water. The mixture is then
left at rest for several hours, when the desired chemical reaction will be complete-
that is to say, the amido-xylol-azo-benzol-mono-sulphonic acid will be transformed
into the diazo-xylol-azo-benzol-mono-sulphonic acid. The next operation consists
in slowly pouring the mixture containing the diazo-xylol-azo-benzol-mono-sulphonic
acid into a solution of 150 kilograms of the sodium salt of alpha-mono-sulphonic
acid of beta-napthol in 100 kilograms of ammonia of ten per cent strength. The
new colouring matter is the result of the reaction of the substances in solution.
The following equation exhibits the changes more specifically :-
=
+C10 He
SO, Na
ONa
N = N CI
CH NN - С H₂
\SO, H
CH,
LC H,
Diazo-xylol-azo-benzol-mono-sulphonic Acid.
Sodium salt of alpha mono
sulphonic acid of beta napthol.
+NH=CH.
N = = N
CHS
SO,NH, C H.
LC H
SO, Na + Na Cl
N=N-C₁ H
OF

page_text: 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
The production of the new dyestuff or colouring matter which results from the
reaction of diazo-xylol-azo-benzol-mono-sulphonic acid with the sodium salt of
the alpha-mono-sulphonic acid of beta napthol; all in manner substantially herein-
before described.