Production of Brown Dyes or Colouring Matters.
Year: 1890

page_text: Date of Application, 31st Jan., 1890
Complete Specification Left, 13th Oct., 1890-Accepted. 15th Nov.. 1890
PROVISIONAL SPECIFICATION.
Production of Brown Dyes or Colouring Matters.
1, THOMAS RICHARD SHILLITO of 89 Chancery Lane, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by John Rudolph Geigy & Co. of Basle, Switzerland, Colour Manu-
facturers, to be as follows:-
This invention is based on the observation that monoazo dye stuffs from diazotised
naphtylamine, or amidoazobenzol, or amidoazotoluol sulpho acid, combined with
metadiamines, yield brown colouring matter by further combination with diazopoly-
chromine.
The dye stuff so produced dyes cotton in a neutral or slightly alkaline bath to which
muriate of ammonia can be added.
Vice versa colouring matters of similar properties are produced by reaction of the
diazo compounds of the aforesaid sulpho acids upon the azo substances obtained from
diazopolychromine with metadiamines.
By polychromine I mean the sulpho acid of this paratoluidine.
As an example of the method of carrying out the invention, 28 kilogrammes of
naphtionate of sodium dissolved in water and mixed with 30 kilogrammes of muriatic
acid, are diazotised by the addition of 8 kilogrammes of nitrite of sodium. The
solution of the diazo compound is then poured into a solution of 12.5 kilogrammes of
metaphenylen diamine or the corresponding quantity of metatoluylendiamine and
20 kilogrammes of caustic soda. To this, after the lapse of twenty four hours, is
added the diazo compound obtained by diazotising 55 kilogrammes of polychromine
(dissolved in water and then mixed with 3.5 kilogrammes of muriatic acid) with
8 kilogrammes of nitrite of sodium. After a second lapse of twenty four hours the
liquid is boiled and the dye stuff precipitated with salt.
When dried it is in the form of a brown powder readily soluble in water.
Dated thi 211 L
1000
T. R. SHILLITO.
COMPLETE SPECIFICATION.
Production of Brown Dyes or Colouring Matters.
I, THOMAS RICHARD SHILLITO of 89 Chancery Lane in the County of Middlesex,
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by John Rudolph Geigy & Co. of Basle, Switzerland, Colour Manu-
facturers, and in what manner the 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 monoazo dye stuffs from diazotised
naphtylamine or amidoazobenzol, or amidoazotoluol sulpho acid combined with meta-
diamines, yield brown colouring matter by further combination with one molecule of
diazopolychromine.
This new dye stuff dyes cotton in a neutral or slightly alkaline bath to which
muriate of ammonia may be added.
Vice versa, colouring matters of similar properties are produced by reaction of the
diazo compounds of the said sulpho acids upon the azo substances obtained from
diazopolychromine with metadiamines.
By polychromine is meant the sulpho-acid of this paratoluidine also called
primuline.
As an example of the method of carrying out the invention; 28 kilogrammes of
naphtionate of sodium, dissolved in water and mixed with 30 kilogrammes of muriatic
Di

page_text: acid, are diazotised by the addition of 8 kilogrammes of nitrite of sodium. The
solution of the diazo compound is then poured into a solution of 12.5 kilogrammes of
metaphenylendiamine or the corresponding quantity of metatoluylendiamine and
20 kilogrammes of caustic soda. To this, after the lapse of twenty four hours, is
added the diazo compound obtained by diazotising 55 kilogrammes of polychromine,
(dissolved in water and then mixed with 3.5 kilogrammes of muriatic acid) with
8 kilogrammes of nitrite of sodium. After a second lapse of twenty four hours the
liquid is boiled and the dye stuff precipitated with salt.
"When dried it is in the form of a brown powder easily soluble in water.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what 1
claim, is:
The production of colouring matters dyeing cotton without mordants, obtained by
combination of metadiamines with two diazo compounds of which one is diazotised
polychromine and the other one of the diazo compounds of naphtylamine, or
amidoazobenzol, or amidoazotoluol sulpho acid, substantially as described.
Dated this 13th day of October 1890.
T. R. SHILLITO.