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CH307325A - Process for making an optical bleach. - Google Patents

Process for making an optical bleach.

Info

Publication number
CH307325A
CH307325A CH307325DA CH307325A CH 307325 A CH307325 A CH 307325A CH 307325D A CH307325D A CH 307325DA CH 307325 A CH307325 A CH 307325A
Authority
CH
Switzerland
Prior art keywords
making
bisoxazole
optical bleach
dibenzoylamino
bleaching agent
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Cas Mainkur
Original Assignee
Cassella Farbwerke Mainkur Ag
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 Cassella Farbwerke Mainkur Ag filed Critical Cassella Farbwerke Mainkur Ag
Publication of CH307325A publication Critical patent/CH307325A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
    • C07D263/52—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems
    • C07D263/62—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings condensed with carbocyclic rings or ring systems having two or more ring systems containing condensed 1,3-oxazole rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)

Description

  

  Verfahren     zur    Herstellung     eines        optischen        Bleichmittels.       Das Schweizer Patent Nr. 301408 betrifft  ein Verfahren zur Herstellung eines optischen  Bleichmittels, dadurch gekennzeichnet, dass  man     o,o'-Dioxybenzidin    mit     Benzoylchlorid        iti     das     Bisoxazol    überführt und dieses sulfoniert,  wobei zwei     Sulfogruppen    in das Molekül ein  geführt werden.  



  Vorliegendes Patent bezieht sich nun auf  ein Verfahren zur Herstellung eines optischen  Bleichmittels, dadurch gekennzeichnet, dass  man     4,4'-Dibenzoylamino-3:3'-dimethoxydiph < ;-          nyl    mit einem sauren Kondensationsmittel  behandelt.  



  Das erhaltene     Bisoxazol    bildet farblose  Blättchen vom     iSchmelzpunkt    249 -     2i50     C.  Es verleiht Gegenständen, denen es einver  leibt wird, ein rein weisses bzw. hell gefärbtes  Aussehen.  



  <I>Beispiel:</I>  In eine Schmelze aus 100 Teilen     Alumi-          niumehlorid    (wasserfrei), 20 'Teilen     Nat.rium-          chlorid    und 20 Teilen     Kaliumchlorid    trägt  man bei     200-21011    unter Rühren im Verlauf  von 15 Minuten 20 Teile     4,4'-Dibenzoylamino-          3,3'-dimethoxy-diphenyl        (Dibenzoyldianisidin)       ein und erhitzt dann langsam im Verlauf von       i/2    Stunde     auf        240,

  -        250 .    Man rührt noch  etwa 3 Stunden bei dieser Temperatur nach  und versetzt die Schmelze nach dem Erkalten  mit Eis und     Salzsäure.    Nach dem Absaugen  und Auswaschen mit Wasser erhält man     eia     graues Pulver, das nach dem     Umkristallisie-          ren    aus     o-Dichlorbenzol        ein.        Produkt    ergibt,  das die gleichen Eigenschaften wie das     itn     Beispiel des Schweizer Patentes     Nr.301408,     Absatz 1, beschriebene     Bisoxazol    aus     o,

  o'-          Dioxybenzidin    und     Benzoylchlorid    besitzt und  Gegenständen, denen es     einverleibt    wird, ein  reiner weisses bzw. heller gefärbtes Aussehen  gibt.



  Process for making an optical bleaching agent. Swiss patent no. 301408 relates to a process for the production of an optical bleaching agent, characterized in that o, o'-dioxybenzidine is converted to bisoxazole with benzoyl chloride and this is sulfonated, with two sulfo groups being introduced into the molecule.



  The present patent now relates to a process for producing an optical bleaching agent, characterized in that 4,4'-dibenzoylamino-3: 3'-dimethoxydiph <; - nyl is treated with an acidic condensing agent.



  The bisoxazole obtained forms colorless leaflets with a melting point of 249-250 ° C. It gives objects to which it is incorporated a pure white or light-colored appearance.



  <I> Example: </I> In a melt of 100 parts of aluminum chloride (anhydrous), 20 parts of sodium chloride and 20 parts of potassium chloride, 20 parts of 4 are added at 200-21011 with stirring over the course of 15 minutes , 4'-Dibenzoylamino-3,3'-dimethoxy-diphenyl (dibenzoyldianisidine) and then slowly heated to 240 in the course of 1/2 hour,

  - 250. The mixture is stirred for about 3 hours at this temperature and, after cooling, the melt is mixed with ice and hydrochloric acid. After suctioning off and washing out with water, a gray powder is obtained which, after recrystallization from o-dichlorobenzene, is obtained. Product that has the same properties as the bisoxazole described in the example of Swiss Patent No. 301408, paragraph 1, from o,

  o'-Dioxybenzidine and benzoyl chloride and gives objects to which it is incorporated a pure white or lighter colored appearance.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines optischen Bleichmittels, dadurch gekennzeichnet, dass man 4,4'-Dibenzoylamino-3,3'-dimethoxydiphe- nyl mit einem sauren Kondensationsmittel behandelt. Das erhaltene Bisoxazol bildet farblose Blättchen vom Schmelzpunkt 24'9 - 2,50 C. Es verleiht Gegenständen, denen es einver leibt wird, ein rein weisses bzw. hell gefärbtes Aussehen. PATENT CLAIM Process for the production of an optical bleaching agent, characterized in that 4,4'-dibenzoylamino-3,3'-dimethoxydiphenyl is treated with an acidic condensation agent. The bisoxazole obtained forms colorless leaflets with a melting point of 24.9-2.50 C. It gives objects into which it is incorporated a pure white or light-colored appearance.
CH307325D 1950-07-03 1951-07-02 Process for making an optical bleach. CH307325A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE307325X 1950-07-03
DE301408X 1950-07-03
DE201050X 1950-10-20

Publications (1)

Publication Number Publication Date
CH307325A true CH307325A (en) 1955-05-31

Family

ID=27182448

Family Applications (1)

Application Number Title Priority Date Filing Date
CH307325D CH307325A (en) 1950-07-03 1951-07-02 Process for making an optical bleach.

Country Status (1)

Country Link
CH (1) CH307325A (en)

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