of Yellow, Orange, and Brown Colours of Alizarine-like Properties.
Year: 1888

page_text: Date of Application, 27th Sept., 1888.
Complete Specification Left, 17th June, 1889-Accepted, 20th July, 1889
PROVISIONAL SPECIFICATION.
Production of Yellow, Orange, and Brown Colours of Alizarine-like
Properties.
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 Rodolph Geigy of Basle Switzerland Colour Manufacturer, to be as
follows:-
This invention has reference to the production of new colours and is based upon
the discovery that yellow, orange and brown colours are obtained by treating with
nitric acid the products derived by combination of aromatic oxy-acids with diazotised
aromatic amines.
To carry out the invention I dissolve, for instance, 12 kilogrammes of aniline-or
the corresponding quantity of toluidine or naphty lamine-in 36 kilogrammes of
muriatic acid and 300 litres of water. At a temperature of 5° Celsius 9 kilogrammes
of nitrite of sodium are added. The solution of diazobenzole thus obtained is poured,
whilst stirring into an alkaline solution of 17 kilogrammes of salicylic acid-or the
corresponding quantity of another oxy-acid such as cresoline acids, oxynaphtoë acids
or resorcing carbonic acids-The resulting product is precipitated with salt or acid and
filtered.
-
The treatment with nitric acid may be effected either with concentrated or with
diluted acid, as follows:-
1. With concentrated acid.
45 kilogrammes of the dry product of combination are dissolved in 135 kilogrammes
of sulphuric acid; a mixture of 20 kilogrammes of nitric acid and 15 kilogrammes of
sulphuric acid is slowly added. Some time afterwards this liquid is poured into
water, then filtered, washed and brought to the consistency of paste.
2. With diluted acid.
The whole quantity of the described product of combination with salicylic acid is
inixed with a solution of 6 kilogrammes of nitrite of sodium and 5 kilogrammes of
nitric acid 36° B. about twelve hours afterwards it is poured into 200 litres of hot
water containing 55 kilogrammes of nitric acid 36° B, then heated during half an hour,
filtered, washed and brought to the consistency of paste.
Dated this 27th day of September 1888.
T. R. SHILLITO,
89, Chancery Lane, London, W.C.
COMPLETE SPECIFICATION.
Production of Yellow, Orange, and Brown Colours of Alizarine-like
Properties.
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 Rodolph Geigy of Basel, Switzerland Colour Manufacturer, and in
what manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention bas reference to the production of new colours, and is based upon the
discovery that yellow orange and brown colours are obtained by treating with nitric
acid the products derived by combination of aromatic oxyacids with diazotised
aromatic amines.
To carry out the invention I dissolve, for instance, 12 kilogrammes of aniline-or
the corresponding quantity of toluidine or naphtylamine-in 36 kilogrammes of

page_text: muriatic acid and 300 liters of water. At a temperature of 5° Celsius 9 kilogrammes
of nitrite of sodium are added. The solution of diazobenzol thus obtained is poured
whilst stirring into an alkaline solution of 17 kilogrammes of salicylic acid, or the
corresponding quantity of another oxyacid such as cresotin acids, oxynaphtoë acids
or resorcine carbonic acids. The resulting product is precipitated with salt or acid and
filtered.
The treatment is carried out with concentrated nitric acid as follows:
45 kilogrammes of the dry product of combination are dissolved in 135 kilogrammes
of sulphuric acid; a mixture of 20 kilogrammes of nitric acid and 15 kilogrammes of
sulphuric acid is slowly added. Some time afterwards the liquid is poured into water,
then collected upon or in a filter, washed and brought to the form of a paste.
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 I
claim, is:
The production of yellow, orange, and brown colours of alizarine-like properties by
the process substantially as described.
רז
T1000
T. R. SHILLITO,
89, Chancery Lane, London, W.C.