Year: 1888

page_text: Date of Application, 2nd Feb., 1888
Complete Specification Left, 20th July, 1888
Complete Specification Accepted, 15th Jan., 1889
[Communicated from abroad by RUPERT GREVILLE WILLIAMS, of Albany, in the
County of Albany, in the State of New York, one of the United States of
America, Manufacturer.]
1, HENRY HARINGTON LEIGH, ASSoc. M. Inst. C.E., Fél. Inst. P.A., practising as
Phillips & Leigh, at No. 22, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, do hereby declare the nature of this
invention to be as follows:-
My invention relates to the production of coloring matters obtained by the action
of tetrazo di-amido-benzole-chloride and its homologues upon
Resorcine, alpha naphthol, the phenole, benzoic and the oxybenzoic acids and
their substitution products,
by which coloring matters soluble in alkalies but insoluble in dilute acids are
obtained upon
:
Aniline and its homologues, beta naphthol, the naphthylamines and their
substitution products,
by which coloring matters insoluble both in alkalies and dilute acids are obtained :
and upon
The sulpho acids of all the above amines, amides, and phenols, and their
substitution products,
by which coloring matters extremely soluble in dilute alkalies, and partially soluble in
water, are obtained.
As an example of the manner of carrying out my invention practically, I obtain a
brown coloring matter by dissolving 10.8 lbs. of phenylenediamine or the proper
quantity of its homologues in 180 lbs. of water and 70 lbs. of muriatic acid of
22° Beaumé. I then cool the solution down to-1°C. A solution of 14 lbs. of
nitrite of sodium in five times its weight of water is then slowly run into the above
acid solution of phenylene-diamine hydrochlorate, care being taken that the tempe-
rature does not rise.

page_text: The clear reddish-brown solution of the tetrazo di-amido-benzole-chloride thus
obtained is run into 22 lbs. of resorcine and 120 lbs. of acetate of soda dissolved
in 1000 lbs. of water.
The brown coloring matter is at once precipitated; and as soon as all the free
mineral acid is taken up, which is generally after the lapse of a few hours the color
may be filtered off; and, if necessary, purified in the-usual manner.
This color is in the form of a reddish-brown powder, and is insoluble in dilute acids
or in water, but is soluble in alkalies.
improvements in the Manufacture of Coloring Matters.
I, HENRY HARINGTON LEIGH, Assoc. M. Inst. C.E., Fel. Inst. P.A., practising as
Phillips & Leigh, at No. 22, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention relates to the production of coloring matters obtained by the action
of tetrazo di-amido benzole-chloride and its homologues upon
Resorcine, alpha naphthol, the phenols, benzoic, and the oxybenzoic acids, and
their substitution products,
by which coloring matters soluble in alkalies but insoluble in dilute acids are
obtained; upon
Aniline and its homologues, beta naphthol, the napthylamines, and their
substitution products,
by which coloring matters insoluble both in alkalies and dilute acids are obtained ;
and upon
The sulpho acids of all the above amines, amides, and phenols, and their
substitution products,.
by which coloring matters extremely soluble in dilute alkalies, and partially soluble in
water, are obtained.
As an example of the manner of carrying out my invention practically, I obtain a
brown coloring matter by dissolving 10.8 lbs. of phenylene-diamine, or the proper
quantity of its homologues, in 180lbs. of water and 70 lbs. of muriatic acid of
22° Beaumé. I then cool the solution down to-10° C. A solution of 14 lbs. of

page_text: nitrite of sodium in five times its weight of water is then slowly run into the above
acid solution of phenylene-diamine hydrochlorate, care being taken that the tempe-
rature does not rise.
The clear reddish brown solution of the tetrazo di-amide benzole-chloride thus
obtained is run into 22 lbs. of resorcine and 120 lbs. of acetate of soda dissolved in
1000 lbs. of water.
The brown coloring matter is at once precipitated; and as soon as all the free
mineral acid is taken up, which is generally after the lapse of a few hours, the
color may be filtered off, and, if necessary, purified in the usual manner.
This color is in the form of a reddish brown powder, and is insoluble in dilute acids
or in water, but is soluble in alkalies.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
The new coloring matters obtained by the action of tetrazo-di-amido benzole
chloride or its homologues on resorcine, the phenols, benzoic, the oxybenzoic acids,
and alpha-naphthol, or their substitution products, on aniline and its homologues,
beta-naphthol and the napththylamines, or their substitution products, and on the
sulpho-acids of the above amines, amides, and phenols, or their substitution products,
which coloring matters have the properties herein set forth.
Dated this 20th day of Tule 1000