Year: 1887

page_text: Date of Application, 7th Nov., 1887
Complete Specification Left, 18th July, 1888
Complete Specification Accepted, 24th Aug., 1888

page_text: 28.8 kilos benzidine are diazotized as in the previous examples and combined with
27 kilos diphenyle amine sulphonate of soda. The formed intermediate compound is
added to an alkaline solution of 9.5 kilos phenole in about 600 litres water.
The solution is stirred again for about 12 hours, is then hoiled and filtered and the
colouring matter is salted out. This produces a yellow tint on cotton.
By combining the above described intermediate product with 16 kilo salicylic acid,
an orange yellow product will be obtained.
5. BENZIDINE + ETHYLANILINE-SULPHO ACID + NAPHTHIONIO ACID.
The tetrazo compound produced from 28.2 kilo benzidine sulphate can be combined
with 23 kilos monoethylaniline sulphonate of soda under the same conditions as
described in example No. 1.
The orange coloured intermediate product then acts upon 26 kilo naphthionate,
with formation of a red colouring matter that is considerably yellower than the dye
known as "Congo red."
3

page_text: 6. BENZIDINE + DIPHENYLAMINE-SULPHO ACID + NAPHTHIONIC ACID.
The intermediate product from benzidine and diphenylamine-sulpho acid already
described combines in an analogous manner with 26 kilo naphthionate to form a
red colouring, matter which in tint stands between that above mentioned
Congo red."
"
7. TOLIDINE + DIPHENYLAMINE-SULPHO ACID + NAPHTHIONIC ACID.
and
In the preparation of tetrazo ditolyle I proceed as in the preparation of tetrazo-
diphenyle only with the difference that 31.2 kilo tolidine sulphate are used.
The intermediate product produced with 27 kilo diphenylamine-sulpho acid, reacts
upon 26 kilo naphthionate with formation of a bluish red colouring matter.
S. BENZIDINE + DIPHENYLAMINE-SULPHO ACID + ẞ NAPHTHOL-SULPHO ACID.
If the above described intermediate product is combined with 26 kilo ẞ naphthole
monosulphonate of soda (schiffer) in alkaline solution, a violet red colouring matter
is produced.
9. TOLIDINE + DIPHENYLAMINE SULPHO ACID + a NAPHTHOLE a SULPHO ACID.
If the intermediate product obtained from tolidine diphenylamine-sulpho acid
is made to react upon a naphthole a monosulpho acid, a red violet colouring inatter is
produced.
10. BENZIDINE + DIPHENYLAMINE-SULPIO ACID + ẞ NAPHTHOLDI-SULPHO ACID.
If instead of the ẞ naphthole monosulpho acids in examples 8 and 9 the equivalent
quantities of a disulpho acid are used, reddish violet colouring matters
formed.
Dated this 7th day of November 1887
are
ABEL & IMRAY,
Agents for the Applicant

page_text: MATTER FRUM BENZIDINE + Z MOLECULES OF MONOETHYLANILINE-
SULPHO ACID.
28.2 kilos of benzidine sulphate or the equivalent quantity of any other benzidine
salt are diazotized in a solution of 600 litres water with 14 kilos nitrite by the addition
of 40 kilos of hydrochloric acid.
The tetrazo compound formed is poured under continual stirring into a solution of
46 kilos monoethylaniline sulphonate of soda in 600 litres of water to which is added
so much acetate of soda that all mineral acid is bound.
After about 12 hours stirring the reaction will be complete, the separated colour
acid is converted into its soda salt, and this is salted out.
The colouring matter which dissolves with difficulty, dyes cotton a sulphur
yellow.
2. BENZIDINE + 2 MOLECULES OF DIPHENYLEAMINE-SULPHO ACID.
The monoethylaniline-sulpho acid of the previous example is replaced by 54 kilos,
diphenylamine-mono sulphonate of soda, producing a colouring matter that dyes
cotton reddish yellow.
3. BENZIDINE + DIPHENYLAMINE SULPHO ACID + ETHYLANILINE SULPHO ACID.
28.2 kilos benzidine-sulphate are diazotized as described, the solution of the
tetrazo compound is poured under stirring into 27 kilos diphenylamine-sulphonate of
soda and 35 kilos acetate of soda dissolved in 600 litres of water.

page_text: The blackish-brown intermediate product formed is introduced into a solution of
23 kilos inonoethylaniline-sulphonate of soda and 6 kilos carbonate of soda in about
900 litres water.
After stirring for 12 hours the colour solution is boiled and filtered and the colouring
matter is then salted out. It dissolves with some difficulty the same as Nos. 1 and 2,
and dyes cotton a reddish yellow.
28.8 kilos benzidine are diazotised as in the previous examples and combined with
27 kilos diphenylamine sulphonate of soda. The formed intermediate compound is
added to an alkaline solution of 9.5 kilos phenole in about 600 litres water.
The solution is stirred again for about 12 hours is then boiled and filtered and the
colouring matter is salted out. This produces a yellow tint on cotton.

page_text: 8. BENZIDINE + DIPHENYLAMINE SULPHO ACID + B-NAPHTHOL SULPHO ACID.
If the above described intermediate product is combined with 26 kilos B-naphthole
monosulphonate of soda (schäffer) in alkaline solution, a violet red colouring matter
is produced.
9. TOLIDINE + DIPHENYLAMINE SULPHO ACID + a NAPHTHOLE a SULPHO ACID.
If the intermediate product obtained from tolidino + diphenylamine-sulpho acid is
made to react upon a naphthole a monosulpho acid a red violet colouring matter is
produced.
10. BENZIDINE + DIPHENYLAMINE, SULPHO AOID + B-NAPHTHOLDI-SULPHO ACID.
If instead of the B-naphthole monosulpho acids in examples 8 and 9 the equivalent
quantities of a disulpho acid are used, reddish violet colouring matters are formed.
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 :-
1. The production of colouring matters that dye unmordanted cotton directly by
the action of one molecule of tetrazo salt upon two molecules of the sulpho acids of
monoethylaniline or diphenylamine.
2. The production of colouring matters that dye unmordanted cotton directly, by
the action of one molecule tetrazo salt upon one molecule of the sulpho acids referred
to in the preceding claim, and the subsequent combination with phenoles salicylic acid,
phenole sulpho acids the sulpho acids of a and ẞ-naphthole or of a- and B-naphthyl-
amine.