IMPROVE MENTS IN THE MANUFACTURE OF ANILINE GREEN
Year: 1865

page_text: LETTERS PATENT to Edward Joseph Hughes, of the City of Manchester,
in the County of Lancaster, Patent Agent, for the Invention of "IMPROVE
MENTS IN THE MANUFACTURE OF ANILINE GREEN."-A communication from
abroad by Charles Lanth. of Paris, in the Empire of France.
Sealed the 26th June 1866, and dated the 29th December 1865.
PROVISIONAL SPECIFICATION left by the said Edward Joseph Hughes
at the Office of the Commissioners of Patents, with his Petition, on the
29th December 1865.
I, EDWARD JOSEPH HUGHES, of the City of Manchester, in the County of
Lancaster, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE MANUFACTURE OF ANILINE GREEN," being a com-
munication to me from abroad by Charles Lauth, of Paris, in the Empire of
France, to be as follows:-
These improvements consist in preparing aniline green by adding aldehydes
to a mixture of magenta dye, aniline red, rosaniline or its salts, and sulphuric
acid, or any other suitable acid. The proportions which I prefer to use are
about as follows:-One part in weight of magenta dye or rosaniline, two parts
in weight of water, two parts in weight of sulphuric acid, and from four to
eight parts of aldehyde. The mixture is allowed to stand until a deep blue
color called aldehyde blue is produced. The said blue is then poured in a
solution of one part of polysulphide of soda or any other analogous sulphide
or substance capable of developing sulphur in the nascent state, and five bun-
dred parts of hot water. After this has been done the mixture is transformed
into a deep green solution 'which is ready for dyeing or for precipitating in the
usual way for aniline colors.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Joseph Hughes in the Great Seal Patent Office on
the 28th June 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
JOSEPH HUGHES, of the City of Manchester, in the County of Lancaster, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of December, in the year of our
Lord One thousand eight hundred and sixty-five, in the twenty-ninth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Edward Joseph Hughes, Her special license that I, the said Edward
Joseph Hughes, my executors, administrators, and assigns, or such others
as I, the said Edward Joseph Hughes, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and lawfully
might make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN THE MANUFACTURE OF ANILINE GREEN," being a communi-
cation to me from abroad by Charles Lauth, of Paris, in the Empire of France,
upon the condition (amongst others) that I, the said Edward Joseph Hughes,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
:
NOW KNOW YE, that I, the said Edward Joseph Hughes, do hereby
declare the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement (that is to say) :-
These improvements consist in an improved method of preparing or manu-
facturing aniline green based upon the action which sulphur in the nascent
state exercises upon the blue of aldehyde. I prepare the blue of aldehyde
in the manner I described and published to the world in the year of our Lord
One thousand eight hundred and sixty. When the mixture of acid, aldehyde,
and rosaniline have arrived at a pure blue tint I pour it into a solution at
70° centigrade of a solution or mixture capable of producing sulphur in the
nascent state. I select, for instance, liver of sulpbur or polysulphuret of

page_text: sodium or potassium, but I can use with success all bodies or mixtures capable
of developing sulphur in the nascent state, subject to the conditions above
mentioned. Thus in practice it may be useful to cause the blue of aldehyde
to re-act upon a mixture of liver of sulphur and sulphite of soda; this
mixture will develope a greater quantity of sulphur than the liver of sulphur
alone. After a short time of contact the mixture is filtered, and the filtered
green liquor will be ready for use. When the green requires to be preci-
pitated I use the ordinary precipitants, and especially tannin, either alone or
with the addition of common salt. The proportions which have given me the
best results are the following, but they may be varied as required:-One part
in weight of magenta or rosaniline, two parts in weight of water, two parts in
weight of sulphuric acid, and from four to eight parts of aldehyde. This
mixture will produce the aldehyde blue after standing a certain time, which
time will vary by the influence of the temperature. The said blue is then
poured in a solution of one part of polysulphide of soda or any other analogous
sulphide or substance capable of developing sulphur in the nascent state, and
five hundred parts of hot water. After this has been done the mixture is
transformed into a deep green solution, which is ready for dyeing or for
precipitating in the usual way for aniline colors.
Having now described the nature and particulars of the said Invention as
communicated to me from abroad, I desire it to be understood that I claim
the action upon a blue color of aldehyde of sulphur in a nascent state.
In witness whereof, I, the said Edward Joseph Hughes, have hereunto
set my hand and seal, this Twenty-seventh day of June, in the year of
our Lord One thousand eight hundred and sixty-six.
Signed, sealed, and delivered by the
within-named Edward Joseph Hughes
in the presence of
G. SEPTIMUS HUGHES,
Patent Agent,
Manchester.
E. J. HUGHES. (L.S.)