Improvements in the Production of Colouring Matters.
Year: 1896

page_text: Date of Application, 26th May, 1896
Complete Specification Left, 26th Feb., 1897-Accepted, 17th Apr., 1897
Improvements in the Production of Colouring Matters.
We READ HOLLIDAY AND SONS LIMITED of Upperhead Row, Huddersfield, in
the County of York, Manufacturing Chemists, and JOSEPH TURNER and JAMES
TURNER Chemists, both in the employment of the said Read Holliday & Sons
Limited do hereby declare the nature of this invention to be as follows:-
This invention consists in the production of colouring matters dyeing cotton fibre
direct various shades of grey, drab, brown or black by heating with sulphur and
sulphide of soda or potash the following bodies :-
Sulphonated or nitro sulphonated compounds of benzene or napthaline or
their homologues.
Sulphonated nitroso compounds of the oxy derivatives of benzene or napthaline
or their homologues.
Diamido napthalines and, or, their sulpho acids.
Or by heating with sulphur and sulphide any of the above named bodies along
with any of the undermentioned substances in any proportions.
Phenols or napthols.
Nitro or nitroso phenols or napthols.
Amido-amidoxy or dioxy phenols or napthols.
Amido-amidoxy or dioxy compounds of nitro or nitroso phenols or
napthols.
Sulphonated compounds of any of the above named substances.
The heating of the sulphur and sulphide with any of the organic bodies or
substances mentioned may be carried out in an iron vessel gradually raising the
temperature of the melt till a sample withdrawn dissolves in water and shows a
strong olive or green solution.
The colouring matters formed dye better in the presence of sulphide of soda or
potash therefore a, larger quantity can be used in the heating than is absolutely
necessary for the formation of the colour. We have found that for one part by
weight of the. organic matter four parts of sulphide and one part of sulphur give
a beneficial result.
Dated the 26th day of May 1806

page_text: The colours obtained may be purified by dissolving and precipitating in the
usual manner.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The production of colouring matters dyeing cotton fibre direct various shades
of grey, drab, brown or black by heating with sulphur and sulphide of soda or
potash the following bodies; sulphonated compounds of benzene naphtalene, or
their homologues; sulphonated nitroso compounds of the oxy derivatives of benzene,
naphtalene or their homologues; diamido-naphtalenes or their sulpho-acids, or by
heating with sulphur and sulphides any of the above named bodies along with any
of the undermentioned, in any suitable proportions; that is to say, phenols, naphtols,
the nitro, nitroso, amido and oxy derivatives, the nitro, and nitroso derivatives
of amido and oxy, phenols, naphtols; and the sulpho acids of any of the above
named.
2. As a new product of manufacture the new dye stuffs produced by the process
hereinbefore described, or by any other means producing the same result.
Dated the 26th day of February 1897.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.