CH194647A - Process for the production of a new intermediate product. - Google Patents
Process for the production of a new intermediate product.Info
- Publication number
- CH194647A CH194647A CH194647DA CH194647A CH 194647 A CH194647 A CH 194647A CH 194647D A CH194647D A CH 194647DA CH 194647 A CH194647 A CH 194647A
- Authority
- CH
- Switzerland
- Prior art keywords
- new intermediate
- production
- intermediate product
- stilbene
- disulfonic acid
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 title claims description 3
- 239000013067 intermediate product Substances 0.000 title description 3
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- MSWXDLQDSZDPEO-UHFFFAOYSA-N NC1=CC=C(C=CC(C(S(O)(=O)=O)=C2)=CC=C2NN)C(S(O)(=O)=O)=C1S(O)(=O)=O Chemical compound NC1=CC=C(C=CC(C(S(O)(=O)=O)=C2)=CC=C2NN)C(S(O)(=O)=O)=C1S(O)(=O)=O MSWXDLQDSZDPEO-UHFFFAOYSA-N 0.000 claims description 2
- NRFOBTGXIGFJMZ-UHFFFAOYSA-N NNC1=CC=C(C=CC(C(S(O)(=O)=O)=C2S(O)(=O)=O)=CC=C2[N+]([O-])=O)C(S(O)(=O)=O)=C1 Chemical compound NNC1=CC=C(C=CC(C(S(O)(=O)=O)=C2S(O)(=O)=O)=CC=C2[N+]([O-])=O)C(S(O)(=O)=O)=C1 NRFOBTGXIGFJMZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical compound OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- -1 hydrazinosulpho-stilbene -2,2'-disulfonic acid Chemical compound 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines neuen Zwischenproduktes. Es wurde gefunden, dass man ein neues Zwischenprodukt - die 4-Amino-4'-hydra- zinosulfo-stilben-2,2'-:disulfonsäure - erhält, wenn man die 4-Nitro-4'-,hydrazinosulfo-stil- ben-2,2'-disulfonsäure, unter Vermeidung,der Anwendung von verseifend wirkenden Mit teln, mit Reduktionsmitteln behandelt.
Das neue Zwischenprodukt bildet ein leicht lösliches '.Salz und kann durch Behan- deln mit Verseifungsmitteln in die Sufon- säure des freien Hydrazins übergeführt wer den. Es ist ein wertvolles Zwisohenprodukt zur Herstellung von Farbstoffen.
<I>Beispiel:</I> 49,5 Teile 4 - Nitro - 4' - hydrazinosulfo- stilben-2,2'-disulfonsäure der Formel
EMI0001.0027
werden als Natriumsalz in Wasser gelöst. Die Lösung wird wie üblich mit Eisenfeile und Essigsäure reduziert. Die Reduktions- brühe wird mit Soda alkalisch gemacht und geputscht.
Aus der Lösung, die das Natriumsalz der 4 -Amino-4'-hydrazinosulfo-stilben-2, 2'-disul- fonsäure der Formel
EMI0001.0033
enthält kann die freie Säure .durch Aus säuern abgeschieden werden.
Process for the production of a new intermediate product. It has been found that a new intermediate - the 4-amino-4'-hydrazinosulpho-stilbene-2,2 '-: disulphonic acid - is obtained when the 4-nitro-4' -, hydrazinosulpho-stilbene -2,2'-disulfonic acid, while avoiding the use of saponifying agents, treated with reducing agents.
The new intermediate product forms an easily soluble salt and can be converted into the sulfonic acid of the free hydrazine by treatment with saponifying agents. It is a valuable intermediate in the manufacture of dyes.
<I> Example: </I> 49.5 parts of 4 - nitro - 4 '- hydrazinosulfostilbene-2,2'-disulfonic acid of the formula
EMI0001.0027
are dissolved in water as the sodium salt. The solution is reduced as usual with an iron file and acetic acid. The reducing broth is made alkaline with soda and pushed.
From the solution containing the sodium salt of 4-amino-4'-hydrazinosulfo-stilbene-2, 2'-disulfonic acid of the formula
EMI0001.0033
contains the free acid can be separated by acidification.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH194647T | 1936-04-09 | ||
| CH191848T | 1937-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH194647A true CH194647A (en) | 1937-12-15 |
Family
ID=25722178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH194647D CH194647A (en) | 1936-04-09 | 1936-04-09 | Process for the production of a new intermediate product. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH194647A (en) |
-
1936
- 1936-04-09 CH CH194647D patent/CH194647A/en unknown
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