Improvements in the Manufacture or Production of Ortho-oxy- diphenyl-carbon-acid.
Year: 1891

page_text: Date of Application, 21st Mar., 1891
Complete Specification Left. 21st Dec., 1891-Accepted, 23rd Jan.. 1892
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture or Production of Ortho-oxy-
diphenyl-carbon-acid.
I BENJAMIN WILLCOX of 47 Lincoln's Inn Fields in the County of Middlesex
Patent Agent, do hereby declare the nature of this invention, which has been
communicated to me from abroad by Dr. F. von Heyden, (Nachfolger) of
Radebuel near Dresden in the Empire of Germany, to be as follows:-
In the course of experiments made with a view to converting oxy-derivatives
of diphenyl into the oxy-carbon acids my foreign correspondent. has discovered that
the ortho-oxy-diphenyl
(melting point 80 degrees Centigrade) is especially well adapted for this purpose.
10 By heating an alkali salt or earthy alkali salt of the substance with carbonic acid
my foreign correspondent has readily obtained the corresponding ortho-oxy-carbon
acid represented by the following diagram.
The process is illustrated by the following example.
160 parts by weight of the said oxy-diphenyl with 40 parts by weight of HNaO
and water are evaporated to dryness. The dry soda salt is heated with carbonic
acid under pressure to from 100 to 220 degrees Centigrade. The product of the
reaction is dissolved in water and decomposed with hydrochloric acid. A thick
.precipitate of ortho-oxy-diphenyl-carbon-acid results; the melting point of which
is about 180 degrees Centigrade.
This new acid can be used as an antiseptic and for the manufacture of colouring
matters or dyestuffs.
Dated this 21st day of March 1891.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in the Manufacture or Production of Ortho-oxy-
diphenyl-carbon-acid.
I, BENJAMIN WILLCOX of 47 Lincoln's Inn Fields, in the County of Middlesex,
Patent Agent, do hereby declare the nature of this invention (which has been
communicated to me from abroad by Dr. F. von Heyden (Nachfolger) of
Radebeul, near Dresden, in the Empire of Germany) and in what manner the
Prine Ad

page_text: same is to be performed to particularly described and ascertained in and by the
following statement:―
In the course of experiments made with a view to converting oxy-derivatives
of diphenyl into the corresponding oxy-carbon acids my foreign correspondent has
discovered that the ortho-oxy-diphenyl
The process is illustrated by the following example.
160 parts by weight of the said oxy-diphenyl with 40 parts by weight of HNaO
and water are evaporated to dryness. The dry soda salt is heated with carbonic 1
acid under pressure to from 100 to 220 degrees Centigrade. The product of the
reaction is dissolved in water and decomposed with hydrochloric acid. A thick
precipitate of ortho-oxy-diphenyl-carbon acid results, the melting point of which is
about 180 degrees Centigrade.
This new acid can be used as an antiseptic and for the manufacture of colouring 2
matters or dyestuffs.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is :-
1. The manufacture of ortho-oxy-diphenyl carbon acid by heating the alkaline 2
or earthy alkaline salts of ortho-oxy-diphenyl with carbonic acid under pressure or
without pressure to from 100 to 220 degrees Centigrade substantially as herein-
before explained.
2. As a new article of manufacture ortho-oxy-diphenyl carbon acid such as is
prepared by the means hereinbefore described.
Dhi 1 dose of December 1901
J. H. JOHNSON & Co.,
Agents.