DE176227C - - Google Patents

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Publication number
DE176227C
DE176227C DENDAT176227D DE176227DA DE176227C DE 176227 C DE176227 C DE 176227C DE NDAT176227 D DENDAT176227 D DE NDAT176227D DE 176227D A DE176227D A DE 176227DA DE 176227 C DE176227 C DE 176227C
Authority
DE
Germany
Prior art keywords
filtered
added
hydrochloric acid
dye
solution
Prior art date
Legal status (The legal status 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 status listed.)
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Application number
DENDAT176227D
Other languages
German (de)
Publication of DE176227C publication Critical patent/DE176227C/de
Active legal-status Critical Current

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Classifications

    • 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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/02—Monoazo dyes prepared by diazotising and coupling from diazotised o-amino-hydroxy compounds

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

Patentes 173011, dadurch gekennzeichnet, daß man zur Sulfurierung des Farbstoffs, erhalten aus der i-Diazo-2-naphtol-4-sulfosäure und ß-Naphtol, an Stelle der in dem Haupt-Patent angegebenen gewöhnlichen und rauchenden Schwefelsäure eine Mischung von Schwefelsäuremonohydrat und Chlorsulfonsäure anwendet.Patent 173011, characterized in that that one for sulfurization of the dye obtained from i-diazo-2-naphthol-4-sulfonic acid and ß-naphtol, instead of the common and fuming sulfuric acid specified in the main patent Mixture of sulfuric acid monohydrate and chlorosulfonic acid applies.

Claims (1)

Patent-Anspruch:
Neuerung in dem Verfahren desPatent claim:
Innovation in the procedure of the und 30 kg Chlorsulfonsäure unter Rühren eingetragen, wobei man durch Kühlung dafür Sorge trägt, daß die Temperatur sich zwischen. 20 bis 25 °'C. hält. Nach etwa 15 Stunden gießt man die Sulfurierungsmasse in 600 1 kaltes Wasser, gibt dazu 80 kg Kochsalz und filtriert den nun ausgeschiedenen Farbstoff ab. Zur Entfernung der anhaftenden Schwefelsäure werden die Filterkuchen bei 650 C. in 500 1 Wasser mit 100 kg Natronlauge von 400 Be. in Lösung gebracht, diese mit 28 kg Salzsäure versetzt und hierauf mit 80 kg Kochsalz der Farbstoff nochmals ausgesalzen, sodann abfiltriert, gepreßt und getrocknet. Das so dargestellte Produkt zeigt alle die schon im Hauptpatent angegebenen Eigenschaften des nach dem dortigen Verfahren erhältlichen Farbstoffs mit der einzigen Ausnahme, daß aus seiner wässerigen Lösung auf Zusatz von Salzsäure kein Niederschlag ausfällt.and added 30 kg of chlorosulfonic acid with stirring, taking care by cooling that the temperature is between. 20 to 25 ° C. holds. After about 15 hours, the sulphurizing mass is poured into 600 l of cold water, 80 kg of common salt are added and the dye which has now separated out is filtered off. To remove the adhering sulfuric acid, the filter cakes are at 65 ° C. in 500 1 of water with 100 kg of 40 ° Be sodium hydroxide solution. brought into solution, mixed with 28 kg of hydrochloric acid and then salted out again with 80 kg of sodium chloride, then filtered off, pressed and dried. The product represented in this way shows all the properties of the dye obtainable by the process there, already indicated in the main patent, with the only exception that no precipitate separates out from its aqueous solution on addition of hydrochloric acid.
DENDAT176227D Active DE176227C (en)

Publications (1)

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DE176227C true DE176227C (en)

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