IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS to be as follows
Year: 1885

page_text: I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature of
my invention for "IMPROVEMENTS IN THE MANUFACTURE OF COLOURING MATTERS
to be as follows:-
'
"
From diazo-benzol and metaphenylene-diamine is obtained, as is known, a
colouring matter termed chrysoidine. If the diazo body is replaced by its nitrated
substitution products, nitrated derivatives of a basic nature are produced which
will colour silk, wool, and cotton yellow or brown, and which I designate by the
name of "Azophosphine."
Especially with metanitraniline is obtained a colouring matter, the colouring
effect of which upon wool, cotton, silk and the like differs little from that of the
phosphines.
Paranitraniline gives a product which colours a little browner; orthonitraniline
or metanitrotoluidine (melting point 70° Celsius) gives a product which colours a
brown-red.
Instead of metaphenylene-diamine, metatoluylene-diamine, monochlorphenylene-
diamine, and other aromatic diamines or their substitution products can be used
with equal success.
The production takes place for instance, in the following manner.
13, 8. Kilogrammes of metanitraniline is dissolved in diluted hydrochloric acid
and diazotized by the addition of the requisite quantity of a solution of nitrite.
The product of reaction is poured, after standing for some time, into an aqueous
solution of 18 Kilogrammes of hydrochloric metaphenylene-diamine.
The colouring matter is produced immediately and is purified by repeated
dissolving and precipitating out.
If the sulpho-acid of this colouring matter is to be obtained, it is preferable to
take, in place of the metanitraniline, its sulpho-acid.
'
Likewise a carbon acid of the Azophosphine is easily obtained by diazotizing
nitro-amidobenzoic acid and combining the product with m-phenylene-diamine.
Dated this 5th day of December 1885
HASELTINE, LAKE & Co.,.
For the Applicant.

page_text: Ì, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of this invention 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 the manufacture of colouring matters.
As is known, a colouring matter termed chrysoidin is obtained from diazo-benzol
and meta-phenylene-diamine.
If the diazo body is replaced by its nitrated sustitution products, nitrated
derivatives of a basic nature are produced, which will colour silk, wool and cotton
yellow or brown, and which I term " Azophosphine." With meta-nitraniline
especially a colouring matter is obtained the colouring effect of which upon wool,
cotton, silk and the like differs little from that of the phosphines.
The production of azophosphine takes place in the following manner.
13. 8 kilogrammes of meta-nitraniline are dissolved in diluted hydrochloric acid,
and diazotized by the addition of the requisite quantity of a solution of nitrite.
The product of the reaction, after standing for some time, is poured into an aqueous
solution of 18 kilogrammes of hydrochloric meta-phenylene-diamine. The colouring
matter is produced immediately, and is purified by repeatedly dissolving and
precipitating it.
If the sulpho-acid of this colouring matter is to be obtained, it is preferable to
take the sulpho-acid of meta-nitraniline in place of meta-nitraniline itself.
Likewise a carbon-acid of the azophosphine is casily obtained by diazotizing
nitro-amido-benzoic acid, and combining the product with meta-phenylene-diamine.
In like manner homologous azophosphines can be obtained from the homologues
of meta-nitraniline and meta-phenylene-diamine respectively as meta-nitro-tolu-
idine and meta-toluylene-diamine.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated to
me by my Foreign Correspondents, I declare that what I claim is :—
The production of colouring matters of a basic nature (termed "Azophosphines ")
by diazotizing meta-nitraniline or meta-nitro-toluidine or their sulpho- or carbon
compounds and combining such diazo products with meta-phenylene-diamine or
meta-toluylene-diamine.
HASELTINE, LAKE & Co.,
Agents for the Applicant.