Production of Basic Gallate of Bismuth.
Year: 1891

page_text: Date of Application, 11th Apr., 1891
Complete Specification Lett. 1st Jan., 1892-Accepted, 6th Feb. 1892
PROVISIONAL SPECIFICATION.
[Communicated from abroad by THE FARBWERKE VORMALS MEISTER LUCIUS.
AND BRUNING, of Hoechst a/Main, Germany, Chemical Manufacturers.]
Production of Basic Gallate of Bismuth.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, do hereby declare
the nature of this invention to be as follows :-
This invention relates to the production of basic gallate of bismuth, a beautiful
5 lemon coloring matter.
My foreign correspondents who communicate this invention proceed, for example,
as follows:-
:-
48 parts by weight of nentral nitrate of bismuth are dissolved in diluted nitric
acid and thereto is added a solution of 19 parts by weight of gallic acid in 40 parts
0 by weight of alcohol and 20 parts by weight of water. To the mixture is added
caustic alkali, alkali carbonate or the like, until the whole remains but slightly
acid. On the addition of acetate of soda and even on diluting with water,
precipitation takes place.
The precipitate thus obtained is basic gallate of bismuth having the formula :-
of bismuth, which according to theory should amount to 504 per cent. ; 494 per cent.
are found in the product, which is in the form of a yellow powder insoluble in
water and in diluted acids.
For the gallic acid in the above example may be substituted any of its neutral
salts which are soluble in water.
יה
11
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Production of Basic Galiate of Bismuth.
I, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Fellow of the Institute of Patent Agents, do hereby
declare the nature of this invention and in what manner the same is to he
performed to be particularly described and ascertained in and by the following
statement:
This invention relates to the production of basic gallate of bismuth, a beautiful
lemon coloring matter.
My foreign correspondents who communicate this invention proceed for example
as follows:
48 parts by weight of neutral nitrate of bismuth are dissolved in diluted nitric
acid and thereto is added a solution of 19 parts by weight of gallic acid in 40 parts
by weight of alcohol and 20 parts by weight of water. To the mixture is added
caustic alkali, alkali carbonate or the like until the whole remains but slightly
acid.
On the addition of acetate of soda and even on diluting with water
precipitation takes place.

page_text: are found in the product.
It is in the form of a yellow powder insoluble in water and in diluted acids.
For the gallic acid in above example may be substituted any of its neutral salts
which are soluble in water.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein described process for production of basic gallate of bismuth by
mixing an alcoholic solution of gallic acid with an acid solution of nitrate of bismuth
and neutralising the mixture, or by mixing a salt of gallic acid soluble in water
with an acid solution of nitrate of bismuth and neutralising the mixture.
2. The basic gallate of bismuth produced as above described.
Dated this 2nd day of December 1891
ABEL & IMRAY,
Agents for the Applicant.