CH99042A - Process for the preparation of a sulfonic acid of the 2nd 3-oxy-naphthoic anilide. - Google Patents
Process for the preparation of a sulfonic acid of the 2nd 3-oxy-naphthoic anilide.Info
- Publication number
- CH99042A CH99042A CH99042DA CH99042A CH 99042 A CH99042 A CH 99042A CH 99042D A CH99042D A CH 99042DA CH 99042 A CH99042 A CH 99042A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxy
- preparation
- sulfonic acid
- anilide
- naphthoic
- Prior art date
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- Optical Filters (AREA)
Description
Verfahren zur Darstellung einer Salfosäure des 2<B>.</B> 3-Oxy-naphtoesäureanillds. Es wurde gefunden, dass das Anilid der 2. 3-Oxynaplitoesälire, welches nach den von Schöpff, Ber. <B>25,</B> 2744 gemachten Angaben oder auuch nach dem Verfahren der deutschen Patentschriften Nr. <B>264527, 293897</B> und <B>295183</B> darstellbar ist, sich durch Einwir kung von Schwefelsäure leicht in eine bisher noch nicht bekannte -.L#ionosulfosä.ure über führen lässt,
welche zur Gewinnung von Farbstoffen Verwendung finden kann.
Diese Sulfosäure, welche die Suliogruppe im ss-oxynaplitoes-liure-Rest enthält, bildet in getrocknetem Zustande ein hellgraues Pulver. Ihre Lösuno- in heissem Wasser nei-t dazu, zn ZD nach dem Erkalten zu einer durchsichtigen Gallerte zu erstarren. Die Alkalisalze sind in Wasser mit schwachgelber Farbe leicht löslich.
Die Men-enverhältnisse, die Konzentra tion der verwendeten Schwefelsäure und die Temperatur bei der Darstellung dieser Sulfo- säure können innerhalb weiter Grenzen schwanken.
<I>Beispiel:</I> 20<B>kg</B> Y-Oxynaphtoesäureanilid werden in etwa<B>90 kg</B> Schwefelsäure von etwa<B>66 '</B> B6 eingerührt und kurze Zeit auf<B>50</B> bis <B>90'</B> erwärmt, bis alles gelöst ist und eine Probe sich klar in verdünnter Sodalösung auflöst.
Durch Eingiessen der auf 20' ab- g#kühlten Reaktionsmasse in eine aus<B>75 kg</B> Kochsalz und<B>300 kg</B> Wasser hergeäellten Kochsalzlösung entstellt ein voluminöser hell grauer Niederschlag, der abfilt-riert und nach mehrmaligem Anrühren mit Kochsalzlösung und Filtrieren direkt als Paste verwendet werden kann.
Method for the preparation of a nitric acid of the 2 <B>. </B> 3-Oxy-naphthoic acid anillds. It has been found that the anilide of the 2nd 3-Oxynaplitoesälire, which according to the von Schöpff, Ber. <B> 25, </B> 2744 or also according to the method of German Patent Nos. 264527, 293897 </B> and <B> 295183 </B> can be represented by the action of sulfuric acid can easily be transferred into a previously unknown -.L # ionosulfosä.ure,
which can be used to obtain dyes.
This sulphonic acid, which contains the sulio group in the ss-oxynaplitoes-liure residue, forms a light-gray powder when dry. Your solution in hot water tends to solidify into a transparent gelatinous jelly after cooling. The alkali salts are easily soluble in water with a pale yellow color.
The proportions of quantities, the concentration of the sulfuric acid used and the temperature when this sulfonic acid is prepared can vary within wide limits.
<I> Example: </I> 20 <B> kg </B> Y-oxynaphthoic anilide are stirred into about <B> 90 kg </B> sulfuric acid from about <B> 66 '</B> B6 and briefly heated to <B> 50 </B> to <B> 90 '</B> until everything is dissolved and a sample dissolves clearly in dilute soda solution.
By pouring the reaction mass cooled to 20 g # into a saline solution made from <B> 75 kg </B> table salt and <B> 300 kg </B> water, a voluminous, light gray precipitate is disfigured, which is filtered off and can be used directly as a paste after stirring several times with saline solution and filtering.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE99042X | 1921-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH99042A true CH99042A (en) | 1923-05-01 |
Family
ID=5647010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH99042D CH99042A (en) | 1921-07-19 | 1922-04-28 | Process for the preparation of a sulfonic acid of the 2nd 3-oxy-naphthoic anilide. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH99042A (en) |
-
1922
- 1922-04-28 CH CH99042D patent/CH99042A/en unknown
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