Improvements in Preparing Colouring Matters of the Oxyketone Group suitable for Dyeing and Printing with the Aid of Mordants.
Year: 1889

page_text: Date of Application, 6th June, 1889
Complete Specification Left, 17th Feb., 1890-Accepted, 22nd Mar., 1830
PROVISIONAL SPECIFICATION.
Improvements in Preparing Colouring Matters of the Oxyketone
Group suitable for Dyeing and Printing with the Aid of
Mordants.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been com-
municated to me from abroad by The Badische Anilin & Soda Fabrik of Ludwigshafen
on Rhine in the Empire of Germany to be as follows:-
--
In my application for Letters Patent numbered 8373 and dated the 20th May 1889
and in my application for Patent of even date herewith I have described the production
of colouring matters resulting from the condensation of phenolic bodies with a certain
class of organic acids or carboxyle derivatives.
According to the present invention similar results are obtained by employing in. lieu
of the said organic acids or carboxyle derivatives the corresponding acid chlorides or
anhydrides. Thus for instance benzoic acid may be replaced by either benzoyl
chloride or benzoic anhydride in order to produce the trioxy benzophenone described
in my above named Specification No. 837389 and the process may be carried out as
follows:-
I. About fifty parts by weight of pyrogallol are slowly and gradually added to about
fifty five parts by weight of benzoyl chloride at a temperature of about 80 degrees
centigrade. After the evolution of gaseous hydrochloric acid has practically ceased
then about one hundred parts by weight of chloride of zinc are added and constantly
agitated, the temperature of the mixture being maintained at about 140 degrees
Centigrade during from 2 to 3 hours. The melt thus produced, is then dissolved.in
about 3000 parts by weight of boiling water preferably with the addition of animal
charcoal, filtered and allowed to cool, when the oxyketone thus obtained will separate
out in a crystallised condition.
II. About equal parts by weight of pyrogallol and of benzoic anhydride are heated
at about 145 degrees Centigrade with about their combined weight of chloride of zinc
during about three hours and constantly agitated. The melt thus produced is then
treated with boiling water as hereinbefore described.
Dated this 5th day of June 1000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Preparing Colouring Matters of the Oxyketone
Group suitable for Dyeing and Printing with the Aid of
Mordants.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention (which has been com-
municated to me from abroad by the Badische Anilin and Soda Fabrik of Ludwig-
shafen-on-the Rhine in the Empire of Germany) and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement :-
In my application for Letters Patent numbered No. 8373 and dated the 20th of
May 1889 and in my application for Letters Patent of even date herewith I have
described the production of colouring matters resulting from the condensation of certain.
phenolic bodies with certain organic acids or carboxyl derivatives

page_text: According to the present Invention similar results are obtained by employing in
lieu of the said organic acids of carboxyl derivatives the corresponding acid chlorides
or anhydrides in so far as the same are known to chemists. Thus for instance benzoic
acid may be replaced by either benzoyl chloride or benzoic anhydride in order by
condensation with pyrogallol to produce the trioxybenzophenone described in my above
named Specification No. 83738 and the process may be carried out in accordance
with the following example which illustrates the manner in which the Invention is or
may be best carried into effect.
I. About fifty parts by weight of pyrogallol are slowly and gradually added to about
fifty five parts by weight of benzoyl chloride at a temperature of about 80 degrees
Centigrade. After the evolution of gaseous hydrochloric acid has practically ceased
then about one hundred parts by weight of chloride of zinc are added and constantly
agitated, the temperature of the mixture being maintained at about one hundred
and forty degrees Centigrade during from two to three hours. The melt thus
produced is then dissolved in about three thousand parts by weight of boiling
water preferably with the addition of animal charcoal filtered and allowed to cool
when the oxyketone thus obtained will separate out in a crystalline condition and may
be filtered pressed and dried.
II. About equal parts by weight of pyrogallol and of benzoic anhydride are heated
at about 145 degrees Centigrade with about their combined weight of chloride of zinc,
during about three hours and constantly agitated. The melt thus obtained is then
treated with boiling water and the colouring matter extracted as hereinbefore described
in example I.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The process of preparing trioxybenzophenone by the condensation of pyrogallol with
benzoyl chloride or with benzoic anhydride substantially as hereinbefore described.
DL1
1711 1
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.