CH273305A - Process for the preparation of a metal-containing monoazo dye. - Google Patents
Process for the preparation of a metal-containing monoazo dye.Info
- Publication number
- CH273305A CH273305A CH273305DA CH273305A CH 273305 A CH273305 A CH 273305A CH 273305D A CH273305D A CH 273305DA CH 273305 A CH273305 A CH 273305A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- sep
- monoazo dye
- metal
- dye
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/52—Unvulcanised treads, e.g. on used tyres; Retreading
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/01—Complex metal compounds of azo dyes characterised by the method of metallisation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Paper (AREA)
Description
Verfahren zur Herstellung eines metallhaltigen Monoazofarbstoges. Es wurde gefunden, dass man zu einem wertvollen metallhaltigen Monoazofarbstoff gelangt, wenn man auf einen Monoazofarb- stoff der Formel
EMI0001.0005
unter Bedingungen, bei denen eine Abspal tung der Alkylgruppe des in o-Stellung zur Azograppe befindlichen -0-Alkyl-Restes statt findet, chromabgebende Mittel einwirken lässt.
Der neue metallhaltige Farbstoff ist eine dunkelgefärbte Substanz, -welche sich in Was ser mit blauer, in verdünnten Alkalihydroxyd- lösungen mit v iolettroter und in konzentrier ter Schwefelsäure mit roter Farbe löst und Tolle aus schwefelsaurem Bade in gleiehmässi- gen, echten blauen Tönen färbt.
Die beim vorliegenden Verfahren als Aus gangsstoffe dienenden, der obigen Formel entsprechenden Monoazofarbstoffe können her gestellt werden, indem man ein diazotiertes 2- Alkoxy=5-methoxy-l--aminobenzol mit 2-Oxy - naphthalin-3,6-disulfonsäure kuppelt.
Die in 2-Stellung der Diazokomponente befindliche Alkoxygruppe enthält vorzugsweise nur we nige, beispielsweise 1 bis 4 Kohlenstoffatome. Als besonders zweckmässiger Ausgangsstoff für das vorliegende Verfahren erweist sich der aus diazotiertem 2,5-Dimethoxy-l-aminobenzol erhältliche Monoazofarbstoff.
Die Diazotierimg des 2-Alkoxy-5-methoxy- 1-aminobenzols kann in üblicher, an sich be kannter Weise, z. B. mit Hilfe von Natritun- nitrit und Salzsäure erfolgen. Die Kupplung der Diazoverbindiing mit der 2-Oxynaphtha- lin-3,6-disulfonsäure erfolgt zweckmässig in alkalischem,
beispielsweise natriumcarbonat- alkalischem 1Hedium. Gegebenenfalls kann die Kupplung auch in Anwesenheit geeigneter Lösungsmittel, wie Alkohol oder Pyridin durchgeführt werden.
Die beim vorliegenden Verfahren als Aus gangsstoffe dienenden Monoazofarbstoffe kön nen gewünschtenfalls aus dem Kupphingsge- misch isoliert und von Verunreinigungen be freit werden. Im allgemeinen kann jedoch zur Behandlung mit den chromabgebenden Mitteln die Kupplungsmasse als Ganzes und ohne Zwischenabscheidung verwendet werden.
In der Regel ist es hierbei notwendig, das Kupplungsgemisch vor der Durchführung der Reaktion mit dem chromabgebenden Mittel auf den für diese Reaktion günstigen pH- Wert, das heisst auf schwach mineralsaure Reaktion einzustellen.
Als chromabgebende Mittel kommen beim vorliegenden Verfahren vor allem die Salze des dreiwertigen Chroms, wie Chromfluorid, Chromsulfate, Chromazetat und Chromfor- iniat in Betracht. Die Behandlung mit den chromabgebenden Mitteln erfolgt unter sol chen Bedingungen, bei welchen eine Abspal- tung der Alkylgruppe des in o-Stellung zur Azogruppe befindlichen -0-Alkyl-Restes statt findet.
Diese Abspaltung unter gleichzeitiger Bildung der komplexen Chromverbindung lässt sich nach an sich bekannter Methode durchführen, indem man die Behandlung mit dem chromabgebenden Mittel, z. B. mit Chrom- formiat oder Chromsulfat in wässerigem, vorzugsweise mineralsaurem Medüun unter Druck bei erhöhter Temperatur, z. B. Tem peraturen zwischen 110 und 140 vornimmt.
Beispiel: 15,3 Teile 2,5-Dimethoxy-1-aminobenzol werden in üblicher Weise in Gegenwart von 30 Teilen 30prozentiger Salzsäure mit 7 Tei len Natriumnitrit diazotiert. Die filtrierte Lö sung der Diazoverbindung wird unter Rühren zu einer auf 10 gekühlten Lösung von 31 Tei len 2 - Oxynaphthalin - 3,6 - disulfonsäure und .40 Teilen Natriiuncarbonat in. 400 Teilen Was ser zufliessen gelassen.
Der entstandene Farb stoff fällt zum grössten Teil aus. Er stellt getrocknet eine dunkel gefärbte Substanz dar, die sich in Wasser und verdünnter Natrium- carbonatlösung mit rubinroter und in konzen trierter Schwefelsäure mit schmutzig violetter Farbe löst und Wolle aus saurem Bade in bordeauxroten Tönen färbt.
Der nach obigen Angaben erhaltene Farb stoff wird nach dein Abfiltrieren ohne vor herige Trocknung mit 1000 Teilen Wasser verrührt und mit 10prozentiger Schwefelsäure bis zur schwach mineralsauren Reaktion ver setzt. Nach Zugabe einer 5,7 Teile Cr ent haltenden Menge Chromsulfat [Cr(OH)SO,] erhitzt man das Reaktionsgemisch im verblei ten Rührautoklaven auf 128 bis 130 und rührt während 20 Stunden bei dieser Tem peratur.
Die entstandene Chromverbindung wird durch Zusatz von 120 Teilen Natrium- chlorid abgeschieden und nach dem Erkalten auf Raumtemperatur abfiltriext und getrock net.
Process for the production of a metal-containing monoazo dye. It has been found that a valuable metal-containing monoazo dye is obtained if one uses a monoazo dye of the formula
EMI0001.0005
chromium-donating agents can act under conditions in which the alkyl group of the -0-alkyl radical in the o-position to the azo-grape is split off.
The new metal-containing dye is a dark-colored substance, which dissolves in water with blue, in dilute alkali hydroxide solutions with violet red and in concentrated sulfuric acid with red, and which is colored in identical, genuine blue tones from sulfuric acid bath.
The monoazo dyes which serve as starting materials in the present process and correspond to the above formula can be produced by coupling a diazotized 2-alkoxy = 5-methoxy-1-aminobenzene with 2-oxynaphthalene-3,6-disulfonic acid.
The alkoxy group in the 2-position of the diazo component preferably contains only a few, for example 1 to 4, carbon atoms. The monoazo dye obtainable from diazotized 2,5-dimethoxy-1-aminobenzene proves to be a particularly suitable starting material for the present process.
The Diazotierimg of the 2-alkoxy-5-methoxy-1-aminobenzene can be in a conventional manner known per se, for. B. with the help of sodium nitrite and hydrochloric acid. The coupling of the diazo compound with 2-oxynaphthalin-3,6-disulfonic acid is best carried out in an alkaline,
for example sodium carbonate-alkaline medium. If necessary, the coupling can also be carried out in the presence of suitable solvents, such as alcohol or pyridine.
The monoazo dyes used as starting materials in the present process can, if desired, be isolated from the Kupphingsgemisch and freed from impurities. In general, however, the coupling compound can be used as a whole and without intermediate deposition for treatment with the chromium donating agents.
As a rule, it is necessary here to adjust the coupling mixture to the pH value favorable for this reaction, that is to say to a weakly mineral acid reaction, before carrying out the reaction with the chromium donating agent.
Particularly suitable chromium-releasing agents in the present process are the salts of trivalent chromium, such as chromium fluoride, chromium sulfates, chromium acetate and chromium formate. The treatment with the chromium-releasing agents takes place under such conditions under which the alkyl group of the -0-alkyl radical in the o-position to the azo group is split off.
This cleavage with simultaneous formation of the complex chromium compound can be carried out according to a method known per se by treating with the chromium-releasing agent, e.g. B. with chromium formate or chromium sulfate in an aqueous, preferably mineral acid medium under pressure at elevated temperature, e.g. B. Tem temperatures between 110 and 140 makes.
Example: 15.3 parts of 2,5-dimethoxy-1-aminobenzene are diazotized with 7 parts of sodium nitrite in the usual manner in the presence of 30 parts of 30 percent hydrochloric acid. The filtered solution of the diazo compound is allowed to flow into a solution, cooled to 10, of 31 parts of 2-oxynaphthalene-3,6-disulfonic acid and 40 parts of sodium carbonate in 400 parts of water.
Most of the resulting dye fails. When dried, it is a dark-colored substance that dissolves in water and dilute sodium carbonate solution with ruby red and in concentrated sulfuric acid with a dirty violet color and dyes wool from acid baths in claret-red tones.
The dye obtained according to the above information is, after filtering off, stirred with 1000 parts of water without prior drying, and ver with 10 percent sulfuric acid until a weak mineral acid reaction. After adding an amount of chromium sulfate [Cr (OH) SO,] containing 5.7 parts of Cr, the reaction mixture is heated to 128 to 130 in the leaded stirred autoclave and stirred at this temperature for 20 hours.
The chromium compound formed is separated off by adding 120 parts of sodium chloride and, after cooling to room temperature, filtered off and dried.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH273298T | 1948-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH273305A true CH273305A (en) | 1951-01-31 |
Family
ID=25731441
Family Applications (10)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH273303D CH273303A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273298D CH273298A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH270540D CH270540A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273302D CH273302A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273305D CH273305A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273299D CH273299A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273300D CH273300A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273301D CH273301A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273297D CH273297A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH274425D CH274425A (en) | 1948-02-26 | 1948-12-24 | Process for the preparation of a metal-containing monoazo dye. |
Family Applications Before (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH273303D CH273303A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273298D CH273298A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH270540D CH270540A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273302D CH273302A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
Family Applications After (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH273299D CH273299A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273300D CH273300A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273301D CH273301A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH273297D CH273297A (en) | 1948-02-26 | 1948-02-26 | Process for the preparation of a metal-containing monoazo dye. |
CH274425D CH274425A (en) | 1948-02-26 | 1948-12-24 | Process for the preparation of a metal-containing monoazo dye. |
Country Status (5)
Country | Link |
---|---|
AT (1) | AT166451B (en) |
CH (10) | CH273303A (en) |
DE (1) | DE848979C (en) |
DK (1) | DK74309C (en) |
NL (1) | NL69348C (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2599147A (en) * | 1948-02-26 | 1952-06-03 | Ciba Ltd | Chromiferous monoazo-dyestuffs |
DE1016866B (en) * | 1955-04-01 | 1957-10-03 | Basf Ag | Process for the preparation of chromium-containing o, o'-dioxyazo dyes |
DE2855970A1 (en) * | 1978-12-23 | 1980-07-10 | Hoechst Ag | METHOD FOR PRODUCING 2,5-DIALKOXY-ANILINE-4-SULPHONIC ACIDS |
CN107345081A (en) * | 2017-07-24 | 2017-11-14 | 北京泛博清洁技术研究院有限公司 | Fur recyclable dyeing phloxine compound and its synthesis and application process |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE474997C (en) * | 1926-08-29 | 1929-04-15 | I G Farbenindustrie Akt Ges | Process for the preparation of complex metal compounds of o-oxyazo dyes |
DE617085C (en) * | 1932-06-05 | 1935-08-12 | I G Farbenindustrie Akt Ges | Process for the production of azo dyes |
-
1948
- 1948-02-26 CH CH273303D patent/CH273303A/en unknown
- 1948-02-26 CH CH273298D patent/CH273298A/en unknown
- 1948-02-26 CH CH270540D patent/CH270540A/en unknown
- 1948-02-26 CH CH273302D patent/CH273302A/en unknown
- 1948-02-26 CH CH273305D patent/CH273305A/en unknown
- 1948-02-26 CH CH273299D patent/CH273299A/en unknown
- 1948-02-26 CH CH273300D patent/CH273300A/en unknown
- 1948-02-26 CH CH273301D patent/CH273301A/en unknown
- 1948-02-26 CH CH273297D patent/CH273297A/en unknown
- 1948-12-24 CH CH274425D patent/CH274425A/en unknown
-
1949
- 1949-01-23 DE DE1949P0032243 patent/DE848979C/en not_active Expired
- 1949-01-27 DK DK28649A patent/DK74309C/en active
- 1949-01-31 AT AT166451D patent/AT166451B/en active
- 1949-02-23 NL NL145046A patent/NL69348C/xx active
Also Published As
Publication number | Publication date |
---|---|
CH273303A (en) | 1951-01-31 |
CH273297A (en) | 1951-01-31 |
DE848979C (en) | 1952-09-11 |
AT166451B (en) | 1950-08-10 |
CH273299A (en) | 1951-01-31 |
NL69348C (en) | 1951-08-15 |
CH270540A (en) | 1950-09-15 |
CH274425A (en) | 1951-03-31 |
CH273300A (en) | 1951-01-31 |
CH273302A (en) | 1951-01-31 |
CH273298A (en) | 1951-01-31 |
DK74309C (en) | 1952-06-16 |
CH273301A (en) | 1951-01-31 |
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