Improvements in and connected with the Manufacture of Colouring Matters.
Year: 1894

page_text: Date of Application, 14th Apr., 1894
Complete Specification Left, 14th Jan., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with the Manufacture of Colouring
Matters.
We, JOSEF BARUCH of 43 Berlinerstrasse and ANDREAS GOLDSOBEL of
127 Schillerstrasse, both of Charlottenburg in the Kingdom of Prussia and
German Empire, Chemists, do hereby declare the nature of this invention to be
as follows:-
This invention relates to the manufacture of certain colouring matters from
phenols, naphthols, or acids of tannins, phenols or naphthols.
According to our present invention a phenol naphthol or acids of tannins phenols
or naphthols, or a mixture of two or more of them, is heated with dibasic fatty acids
at a temperature between 115° and 200° C.
The melted mass obtained thus, is dissolved in water or other suitable solvent,
and can be applied either immediately or after neutralisation by the addition of
soda to the purposes of dycing or printing fibres and textures.
To obtain a pure dye from the product, it may be dissolved in weak acetic acid,
reduced with an excess of metallic zine; the nearly colourless solution thus obtained
is then evaporated until quite dry. By treating the residuum left after evaporation,
with alcohol, the colouring matter is extracted.
The solution thus obtained is evaporated until quite dry and is finally subjected
to treatment with ether.
As an example of the processes which we may employ in carrying out our inven-
tion, we may heat two parts of phloroglucin with one part of protocatechuic acid
and from 2 to 5 parts of oxalic acid. A. melted mass is thereby obtained, the
solution of which applied in dyeing and printing processes in the same manner as
natural catechu, shews exactly the same results.
From other phenols, acids of tannins and phenols and their derivatives, mixed or
separate, there can be obtained in precisely the same manner, a series of other dye-
stuffs, some of which are completely identical with the natural dyestuffs, as for
example, hacunatein, brazilin, quercetin, bixin, and the like.
Dated this 13th day of April A.D. 1894.
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in and connected with the Manufacture of Colouring
Matters.
We, JOSEF BARUCH of 43 Berlinstrasse, and ANDREAS GOLDSOBEL, of
127 Schillerstrasse, both of Charlottenburg in the Kingdom of Prussia. and
German Empire, Chemists, 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 certain colouring matters from
Price 77

page_text: phenols, naphthols or acids of tannins phenols or naphthols, such as tannic acids,
oxybenoic acid, phenol sulphonic acids, naphthol sulphonic acids, etc.
According to our present invention a phenol, a naphthol, or acids of tannins
phenols or naphthols, such as those above described, or a mixture of two or more
of them, is heated with dibasic fatty acids at a temperature between 115° and
200° C.
The melted mass obtained thus is dissolved in water or other suitable solvent,
and can be applied either immediately or after neutralisation by the addition of
soda, to the purposes of dyeing or printing fibres and textures.
To obtain a pure dye from the product, it may be dissolved in weak acetic acid,
reduced with an excess of metallic zinc; the nearly colourless solution thus
obtained is then evaporated until quite dry. By treating the residuum left after
evaporation, with alcohol, the colouring matter is extracted.
The solution thus obtained is evaporated until quite dry and is finally subjected
to treatment by washing with ether.
As an example of the processes which we may employ in carrying out our inven-
tion, we may heat 2 parts of phloroglucin with one part of protocatechuic acid and
from 2 parts to 5 parts of oxalic acid. A melted mass is thereby obtained, the
solution of which applied in dyeing and printing processes in the same manner as
natural catechu, shews exactly the same results.
From other phenols, acids of tannins and phenols, such as those hereinbefore
described, and their derivatives, mixed or separate, there can be obtained in
precisely the same manner a series of other dyestuffs, some of which are completely
identical with the natural dyestuffs as for example haematein, brazilin, quercetin,
bixin, and the like.
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 herein before described process for obtaining colouring matters by heating
dibasic fatty acids with phenols, naphthols, acids of phenols naphthols or tannins
or derivatives of these substances, and dissolving and eventually neutralising the
melted mass for the purpose of dyeing or printing fibres and textures, substantially
as set forth.
2. In the herein before described process for producing colouring matters,
treating the melted mass obtained as described in the preceding claim by
evaporating it to dryness, absorbing the colouring matter with alcohol, evapo-
rating the alcohol and washing the solid colouring matter with ether, substantially
as set forth.
3. The hereinbefore described process for obtaining artificial catechu colouring
matters by heating oxalic acid with phloroglucin and protocatechuic acid,
substantially as set forth.
4. Colouring matters produced substantially as and by the process hereinbefore
described.
Dated this 14th day of January A.D. 1895.
WILLIAM E. HEYS,
Agent for the Applicants.