Manufacture of a Yellow Basio Colouring Matter.
Year: 1894

page_text: Date of Application, 7th Sept., 1894
Complete Specification Left, 7th June, 1895-Accepted, 13th July, 1895
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBWERKE, vormals MEISTER LUCIUS
AND BRUNING, of Hoechst a/ Main, in the Empire of Germany, Chemical
Manufacturers.]
Manufacture of a Yellow Basio Colouring Matter.
1, OLIVER IMRAY, of No. 28, Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, do hereby declare the nature of this
invention to be as follows:-
My foreign correspondents have found that, by heating metanitrophenol or its
ethers with paratoluidine and paratoluidine-hydrochlorate in presence of metallic
chlorides a valuable yellow basic dye-stuff is obtained.
The base of the dye-stuff thus obtained has the composition CH,,N and is to
be regarded as the first homologue of diamidodiphenylacridine (chrysaniline) which
is also known by the name of "phosphine." It is formed according to the following
equations :

page_text: The nitrate, soluble with difficulty, is characteristic. The new dyestuff dyes
wool and cotton mordanted with tannin yellow.
Dated this 7th day of September 1894.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Manufacture of a Yellow Basic Colouring Matter.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, 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 :-
My foreign correspondents have found that by heating metanitrophenol or its
ethers with paratoluidine and paratoluidine-hydrochlorate in presence of metallic
chlorides a valuable yellow basic dye stuff is obtained.
17
The base of the dyestuff thus obtained has the composition C, H₁N, and is to
be regarded as the first homologue of diamido diphenylacridine (chrysaniline) which
is also known by the name of "phosphine." It is formed according to the following
equation:
-
1 From matanitzantonal
The new dyestuff is manufactured in the following manner :-
100 kilos. of paratoluidine hydrochlorate
د"
30
» paratoluidine and
10
"
"
ferrous chloride
are heated to the melting point in a vessel provided with an agitator at the
temperature of from 200° to 220° C.
30 kilos. of metanitrophenol or the equivalent quantity of an ether of
metanitrophenol are gradually added.
After the reaction is completed, the melt is repeatedly extracted with hot water
and the red dye stuff is precipitated with salt from the combined filtered extracts.
The dyestuff is then redissolved and purified by fractional precipitation with alkali
and finally couverted into the nitrate which is soluble with difficulty and crystallises
well.
The base of the new dye-stuff is slightly soluble in water, readily soluble in
alcohol, ether and benzene, forming yellow solutions, with fine green fluorescence;
it melts at 230° C.
The nitrate soluble with difficulty, is characteristic. The new dyestuff dyes
wool and cotton mordanted with tannin yellow.
1

page_text: 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 :-
1. Manufacture of a yellow basic colouring matter by the melting of meta-
nitrophenol or its ethers with paratoluidine and paratoluidine-hydrochlorate in the
presence of metallic chlorides substantially as described.
2. As a new product the yellow basic colouring matter obtained by the process
set forth in the preceding claim.
Dated this 7th day of June 1805
ABEL & IMRAY,
Agents for the Applicant.