CH121012A - Process for the preparation of a developer dye. - Google Patents

Process for the preparation of a developer dye.

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Publication number
CH121012A
CH121012A CH121012DA CH121012A CH 121012 A CH121012 A CH 121012A CH 121012D A CH121012D A CH 121012DA CH 121012 A CH121012 A CH 121012A
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CH
Switzerland
Prior art keywords
red
pyrazolone
phenyl
preparation
methyl
Prior art date
Application number
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German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH121012A publication Critical patent/CH121012A/en

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  Verfahren zur Darstellung eines     Entwielderfarbstoffes.       Es wurde gefunden,     dass    ein wertvoller       Entwicklerfarbstoff    erhalten wird, wenn man       tetrazotiertes        o-Tolidin    in molekularem Ver  hältnis mit     2'-1'Ilethyl-S'-amino-5-sulfo-l-          phenyl   <B>- 5 -</B>     pyrazolon   <B>- 3 -</B>     karbonsäure    zu einem  Zwischenprodukt vereinigt und dasselbe in  alkalischer Lösung mit     1-Phei)y1-3-rnethyl-5-          pyrazolon        weiterkuppelt.    Der neue Farbstoff  bildet ein rotbraunes Pulver,

   das sich in  Wasser mit roter, in konzentrierter Schwefel  säure mit rotvioletter Farbe löst. Er färbt       ungebeizte    Baumwolle in blauroten Tönen,  welche durch     Diazotieren    auf der Faser und  nachfolgende     Entwieklung    mit     Betanaphtol     ohne wesentliche     Nuancenänderung    wasch  echt fixiert werden.  



  <I>Beispiel:</I>       Zu    der     Tetrazoditolyllösung    aus     9,1,2    Tei  len     o-Tolidin        lässt    man bei<B>0-5 0 C</B> die Lö  sung des     Trinatriumsalzes    von<B>31,3</B> Teilen       2'-Alethyl   <B>-</B>     3'-amino   <B>-</B>     5'-        stilfo   <B>- 1 -</B>     phenyl   <B>-</B>     D'        -          pyrazolon   <B>- 3 -</B>     karbonsäure    zufliessen.

   Sobald  unveränderte     Tetrazoverbindung    nicht mehr  nachgewiesen werden kann, gibt man die  Lösung von 20 Teilen     kalzinierter    Soda und    hierauf die schwach     natronalkalische    Lösung  von 17,4 Teilen     1-Phenyl-3-methyl-5-pyrazolon     zu. Nach wenigen Stunden ist die Kombina  tion beendigt; man wärmt auf<B>50 0</B>     C    an,  neutralisiert die überschüssige Soda mit Salz  säure und salzt den Farbstoff aus.



  Process for the preparation of a developer dye. It has been found that a valuable developer dye is obtained when tetrazotized o-tolidine is used in a molecular ratio with 2'-1'ilethyl-S'-amino-5-sulfo-1-phenyl <B> -5- </ B > Pyrazolon <B> - 3 - </B> carboxylic acid combined to form an intermediate product and the same coupled further in alkaline solution with 1-Phei) y1-3-methyl-5-pyrazolone. The new dye forms a red-brown powder,

   which dissolves in water with red, in concentrated sulfuric acid with red-violet color. It dyes unstained cotton in blue-red tones, which are fixed by diazotizing on the fiber and subsequent development with betanaphtol without any significant change in shade.



  <I> Example: </I> The solution of the trisodium salt of <B> 31.3 is added to the tetrazoditolyl solution of 9.1.2 parts of o-tolidine at <B> 0-5 ° C. </B> </B> Share 2'-Alethyl <B> - </B> 3'-amino <B> - </B> 5'- stilfo <B> - 1 - </B> phenyl <B> - </ B> D '- pyrazolone <B> - 3 - </B> carbonic acid flow in.

   As soon as unchanged tetrazo compound can no longer be detected, the solution of 20 parts of calcined soda and then the weakly alkaline sodium solution of 17.4 parts of 1-phenyl-3-methyl-5-pyrazolone are added. The combination is over after a few hours; it is warmed up to <B> 50 0 </B> C, the excess soda is neutralized with hydrochloric acid and the dye is salted out.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Ent- wicklerfarbstoffes, dadurch gekennzeichnet, dass man tetrazotiertes o-Tolidin in moleku larem Verhältnis mit 2-Methyl-3'-amino-5- sulfo-l-phenyl-5-pyrazolon-3-karbonsäure zu einem Zwischenprodukt vereinigt und dasselbe in alkalischer Lösung mit 1-Phenyl-3-methyl- 5-pyrazolon weiterkuppelt. Der neue Farb stoff bildet ein rotbraunes Pulver, das sich inWassermitroter, PATENT CLAIM: Process for the preparation of a developer dye, characterized in that tetrazotized o-tolidine in a molecular ratio with 2-methyl-3'-amino-5-sulfo-1-phenyl-5-pyrazolone-3-carboxylic acid to form a Combined intermediate product and the same in alkaline solution with 1-phenyl-3-methyl-5-pyrazolone coupled. The new dye forms a reddish-brown powder that turns into water red, inkonzeiitrierterScliwefel- saure mit rotvioletter Farbe löst. Er färbt ungebeizte Baumwolle in blauroten Tönen, welche durch Diazotieren auf der Faser und nachfolgrende Entwicklung mit Betanaphtol ohne wesentliche Nuanconänderung wasch echt fixiert werden. dissolves inconcentrated sulfuric acid with a red-violet color. It dyes unstained cotton in blue-red tones, which are fixed by diazotization on the fiber and subsequent development with betanaphtol without any significant change in shade.
CH121012D 1925-03-28 1925-11-02 Process for the preparation of a developer dye. CH121012A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE121012X 1925-03-28
CH119229T 1925-10-17

Publications (1)

Publication Number Publication Date
CH121012A true CH121012A (en) 1927-06-16

Family

ID=25709196

Family Applications (1)

Application Number Title Priority Date Filing Date
CH121012D CH121012A (en) 1925-03-28 1925-11-02 Process for the preparation of a developer dye.

Country Status (1)

Country Link
CH (1) CH121012A (en)

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