Improvements in the Production and Separation of Methylamines, Ethylamines, Phenylamines, and Naphthylamines.
Year: 1891

page_text: Date of Application, 27th Feb., 1891
Complete Specification Left, 21st Nov., 1891-Accepted, 6th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Production and Separation of Methylamines,
Ethylamines, Phenylamines, and Naphthylamines.
I, RAYMOND VIDAL, of 23, Boulevard de Strasbourg, Paris, in the Republic of
France, Apothecary, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the production and separation of methylamines,
ethylamines, phenylamines and naphthylamines.
If upon a nitride of a metalloid, (azoture metalloidique) such as phosphane,
nitride of boron, cyanogen, either free or in combination with hydrogen or a metal,
hydrates of methyl or ethyl or the oxides of these hydrocarburetted radicles are
caused to act in a closed vessel at a temperature varying according to the
compounds employed, the following will be obtained :-
Firstly An acid formed on the one hand by the metalloid of the nitride and
on the other hand by oxygen and either by one part of hydrogen or by one part of
the hydrocarburetted radicles of the second compound entered into re-action
according to whether a hydrate or an oxide of the carburets has been employed.
Secondly-One or more monamines which depend upon the nitride and the
temperature employed.
Thus with phosphane and methylic alcohol I have
With phosphane the reaction can be effected at the ordinary pressure.
In the case of the simultaneous production of several amines that amine the
substitution of which is the least advanced rests combined with the acid produced
whilst the other or the others is or are found in a free state and can be easily
separated by distillation. The nitrides can also be acted on by mixtures, in
suitable proportions according to the products it is desired to obtain, either of
water and hydrate or oxide of the carburets above indicated or of hydrate and
oxide of the same hydrocarburets.
Phosphane can be economically obtained by moistening pulverized sulphur with
a solution of white phosphorus in sulphuret of carbon allowing the sulphur to
evaporate into the atmosphere or eliminating it by distillation, mixing the residue
with sal ammoniac and heating the whole to a white heat in order to collect the
The mixture of
volatile products which become disengaged from the mixture.
phosphorus, sulphur and sal ammoniac should be in the following proportions,

page_text: oxides of these hydrocarburetted radicles I sometimes treat phenols or naphthols
for the purpose of obtaining phenylamines and naphthylamines.
Dated the 27th day of February 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Production and Separation of Methylamines,
Ethylamines, Phenylamines, and Naphthylamines.
I, RAYMOND VIDAL, of 23, Boulevard de Strasbourg, Paris, in the Republic of
France, Apothecary, 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 production and separation of methylamines,
ethylamines, phenylamines and naphthylamines.
If upon a nitride of a metalloid (azoture métalloidique) such as phospham,
nitride of boron, cyanogen, either free or in combination with hydrogen or a metal,
hydrates of methyl or ethyl or the oxides of these hydrocarburetted radicles are
caused to act in a closed vessel at a temperature varying according to the
compounds employed, the following will be obtained :-
Firstly An acid formed on the one hand by the metalloid of the nitride and
on the other hand by oxygen and either by one part of hydrogen or by one part of
the hydrocarburetted radicles of the second compound entered into re-action
according to whether a hydrate or an oxide of the above indicated carburets has
been employed.
Secondly-One or more monamines which depend upon the nitride and the
temperature employed.
Thus with phospham and methylic alcohol I have
With phospham the reaction can be effected at the ordinary pressure.
In the case of the simultaneous production of several amines, that amine, the
substitution of which is the least advanced, remains combined with the acid
produced whilst the other or the others is or are found in a free state and can be
casily separated by distillation. The nitrides can also be acted on by mixtures, in
suitable proportions according to the products it is desired to obtain, either of
water and hydrate or oxide of, the carburets above indicated or of hydrate and
oxide of the same hydrocarburets.
Phospham can be economically obtained by moistening pulverised sulphur with
a solution of white phosphorus in sulphuret of carbon allowing the sulphur to
evaporate into the atmosphere or eliminating it by distillation, nixing the residue
with sal ammoniac and heating the whole to a white heat in order to collect the
volatile products which become disengaged from the mixture. The mixture of
phosphorus, sulphur and sal ammoniac should be in the following proportions,

page_text: Instead of treating the nitrides with hydrates of methyl or of ethyl or the oxides
of these hydrocarburetted radicles I sometimes treat phenols or naphthols for the
purpose of obtaining phenylamines and naphthylamines.
To manufacture fatty amines by means of phospham (PNH) I heat in a boiler
at a temperature of about 230 degrees a mixture of one part of phospham and a
little more than four parts of alcohol, or for methylamines:

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 :-
The herein described process of producing and separating methylamines,
ethylamines, phenylamines and naphthylamines, substantially as set forth."
Dated the 21st day of November 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.