NOVEL PRODUCTS AND COLOURING MATTERS DERIVED FROM CHLOROPHTALIC ACIDS AND NITROCHLOROPHTALIC ACIDS.
Year: 1879

page_text: LETTERS PATENT to Charles Casthelaz, of Manchester, in the County of
Lancaster, Manufacturing Chemist, for the Invention of "NOVEL PRODUCTS
AND COLOURING MATTERS DERIVED FROM CHLOROPHTALIC ACIDS AND
NITROCHLOROPHTALIC ACIDS.". A communication from abroad by John
Casthélaz. of Paris, in the Republic of France.
PROVISIONAL SPECIFICATION left by the said Charles Casthélaz at the
Office of the Commissioners of Patents on the 4th February 1879.
"
CHARLES CASTHÉLAZ, of Manchester, in the County of Lancaster, Manufac-
turing Chemist. NOVEL PRODUCTS AND COLOURING MATTERS DERIVED FROM
CHLOROPHTALIC ACIDS AND NITROCHLOROPHTALIC ACIDS." [A communication
from abroad by John Casthélaz, of Paris, in the Republic of France.]
The said Invention has for its principal object to produce colouring matters
analogous to those derived from the phtaleines and phtalines but having improved
or different shades and qualities. In the ordinary preparation of the said phtaleines
and phtalines phtalic acid is employed. According to the said Invention the chloro-
phtalic and nitrochlorophtalic acids are employed, the processes in other respects
being the same or similar as when phtalic acid has been used. The chlorophtalic
or nitrochlorophtalic acids employed are either specially manufactured for the
purpose or are derived from the residues resulting from the manufacture of phtalic
acid. The resultants of the processes when using chlorophtalic acids are chloro-
phtaleines and chlorophtalines, and from these products the new colouring matters are
derived by the same combinations or re-actions as when treating the plitaleines and
phtalines, the resultants being of shades different to the old colours, as, for example,
the ordinary tetrabromated fluoresceine, that is, the "eosin" of commerce furnishes
yellowish red shades, whilst the tetrabromated chlorofluoresceine, one of the new
colouring matters resulting from the use of the chlorophtalic acids, which colouring
matter the communicator terms "cerise," furnishes red cerise shades. The said

page_text: colouring matters may be employed for the same purposes as the old colours,
namely, in dyeing and printing processes, and in the preparation of lakes, or artificial
lakes, and for other processes. The new products, the chlorophtaleines..and
chlorophtalines may be the derivatives of colouring matters by other than the
ordinary processes or combinations.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Casthelaz in the Great Seal Patent Office on the 2nd
August 1879.
"
CHARLES CASTHÉLAZ, of Manchester, in the County of Lancaster, Manufac-
turing Chemist. NOVEL PRODUCTS AND COLOURING MATTERS DERIVED FROM
CHLOROPHTALIC ACIDS AND NITROCHLOROPHTALIC ACIDS." (A communication
from abroad by John Casthélaz, of Paris, in the Republic of France.)
The said Invention has for its principal object to produce colouring matters
analogous to those derived from the phtaleines and phtalines but having improved
or different shades and qualities. In the ordinary preparation of the said phtaleinos
and phtalines phtalic acid is employed. According to the said Invention the
chlorophtalic acids are employed, the processes in other respects being the same or
similar as when phtalic acid has been used. The chlorophtalic acid employed is
either specially manufactured for the purpose, or corresponding acids derived from
the residues resulting from the manufacture of phtalic acid may be used. The
resultants of the processes are chlorophtaleines and chlorophtalines, and from these
products the new colouring matters are derived by the same combinations, or re-
actions as when treating the phtaleines and phtalines, the resultants being of shades
differing from the old colours, as, for example, the ordinary tetrabromated fluores-
ceine, that is, the "eosin" of commerce furnishes yellowish red shades, whilst the
tetrabromated chlorofluorescein, one of the new colouring matters resulting from the
use of the chlorophtalic acids, which colouring matter the communicator terms
"" cerise," furnishes red cerise shades. The said colouring matters may be employed
for the same purposes as the old colours, namely, in dyeing and printing processes,
and in the preparation of lakes or artificial lakes, and for other purposes.
products, the chlorophtaleines and chlorophtalines, may be the derivatives of
colouring matters by other than the ordinary processes or combinations. Nitro-
chlorophtalic acids may be used in lieu of the chlorophtalic, the results being sub-
stantially the same. Iodated chloroflurosceines prepared from the chlorophtalic or
nitro-chlorophtalic acids are also new colouring matters, differing from the ordinary
iodated fluorosceines and having special and distinct properties.
The new
Having now described my said Invention, and the mode or manner of carrying
the same into effect, I would observe in conclusion that what I consider novel and
original, and therefore claim as the Invention secured to me by the bereinbefore
in part recited Letters Patent is,-
The employment of chlorophtalic or nitro-chlorophtalic acids in the prepara-

page_text: tion of colouring matters, substantially in the manner hereinbefore set forth and
indicated.
In witness whereof, I, the said Charles Casthélaz, have hereunto set my
hand and seal, this Thirtyfirst day of July, in the year of our Lord One
thousand eight hundred and seventy nine.
Signed and sealed by the
said Charles Casthelaz
in the presence of
EDWARD K. DUTTON,
Agent to the Patentee,
St. Ann's Churchyard,
Manchester.
CH CASTHELAZ, (L.S.)