CH201833A - Process for the production of a new intermediate product. - Google Patents
Process for the production of a new intermediate product.Info
- Publication number
- CH201833A CH201833A CH201833DA CH201833A CH 201833 A CH201833 A CH 201833A CH 201833D A CH201833D A CH 201833DA CH 201833 A CH201833 A CH 201833A
- Authority
- CH
- Switzerland
- Prior art keywords
- parts
- intermediate product
- production
- new intermediate
- disulfonic acid
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 3
- 239000013067 intermediate product Substances 0.000 title description 3
- 238000004519 manufacturing process Methods 0.000 title 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 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- -1 4-nitro-4'-diazosulfostilbene-2,2'-disulfonic acid Chemical compound 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GHBWBMDGBCKAQU-OWOJBTEDSA-N 5-amino-2-[(e)-2-(4-nitro-2-sulfophenyl)ethenyl]benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC(N)=CC=C1\C=C\C1=CC=C([N+]([O-])=O)C=C1S(O)(=O)=O GHBWBMDGBCKAQU-OWOJBTEDSA-N 0.000 description 1
- 244000248349 Citrus limon Species 0.000 description 1
- 235000005979 Citrus limon Nutrition 0.000 description 1
- 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 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000008049 diazo compounds Chemical class 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Herstellung eines neuen Zwischenproduktes. In der Patentschrift Nr. 194647 ist ge zeigt worden, dass man zu einem neuen Zwi schenprodukt, der 4-Amino-4'-bydrazinosulfo- stilben-2,2'-disulfonsäure, gelangen kann, wenn man die 4-Nitro-4'-hydrazinosulfostilben-2,2'- disulfonsäure unter Vermeidung der Anwen dung von verseifend wirkenden Mitteln mit Reduktionsmitteln behandelt.
Es wurde nun gefunden, dass man die 4 Amino-4'-hydrazinosulfostilben-2,2'-disulfon- säure auch erhalten kann, wenn man die 4- Nitro - 4'- diazosulfostilben - 2,2'- disulfonsäure unter Vermeidung der Anwendung von ver- seifend wirkenden Mitteln mit Reduktions mitteln behandelt. Die 4-Amino-4'-hydrazino- sulfostilben-2,2'-disulfonsäure wird zur Her stellung von Farbstoffen verwendet.
<I>Beispiel:</I> 40 Teile 4-Nitro-4'-aminostilben-2,2'-di- sulfonsäure werden in üblicher Weise mit 7 Teilen Natriumnitrit dianotiert. Die leuch tend zitronengelb ausgeschiedene Diazover- bindung wird in eine Mischung von 30 Teilen Natriumbisulfit (entsprechend 1 Mol SO2 15 %), 30 Teilen Natriumcarbonat und 50 Teilen Wasser eingetragen.
Sollte die Tem peratur von 10 0 überschritten werden, so wird etwas Eis zugefügt. Nach 2'/2-stündigem Einwirken wird die klare gelbe Lösung mit etwa 30 Teilen 30 0%iger. Salzsäure so ver setzt, dass die Reaktion eben Kongopapier schwärzt. Die Lösung wird dann innert etwa 40 Minuten in ein Gemisch von 30 Teilen Eisen, 200 Teilen Wasser und 2 Teilen Essig säure bei 90-93" einlaufen gelassen und 1 Stunde bei dieser Temperatur weiter ge rührt. Nun wird mit 4,5 Teilen Natriumcar- bonat alkalisch gestellt, abgesaugt und die klare hellgelbe Lösung im Vakuum einge dampft.
Process for the production of a new intermediate product. Patent specification No. 194647 has shown that a new intermediate product, 4-amino-4'-bydrazinosulfostilbene-2,2'-disulfonic acid, can be obtained if the 4-nitro-4 ' -hydrazinosulfostilbene-2,2'-disulfonic acid treated with reducing agents while avoiding the use of saponifying agents.
It has now been found that the 4-amino-4'-hydrazinosulfostilbene-2,2'-disulfonic acid can also be obtained if the 4-nitro-4'-diazosulfostilbene-2,2'-disulfonic acid is avoided by using it treated by saponifying agents with reducing agents. The 4-amino-4'-hydrazinosulfostilbene-2,2'-disulfonic acid is used for the manufacture of dyes.
<I> Example: </I> 40 parts of 4-nitro-4'-aminostilbene-2,2'-disulfonic acid are dianotized with 7 parts of sodium nitrite in the customary manner. The diazo compound precipitated in a bright lemon yellow color is introduced into a mixture of 30 parts of sodium bisulfite (corresponding to 1 mol of SO2 15%), 30 parts of sodium carbonate and 50 parts of water.
If the tem perature of 10 0 is exceeded, so some ice is added. After 2 1/2 hours of exposure, the clear yellow solution becomes 30% strength with about 30 parts. Hydrochloric acid is so displaced that the reaction turns Congo paper black. The solution is then allowed to run into a mixture of 30 parts of iron, 200 parts of water and 2 parts of acetic acid at 90-93 "within about 40 minutes and stirring is continued for 1 hour at this temperature. 4.5 parts of sodium carbonate are then added. bonat made alkaline, filtered off with suction and the clear light yellow solution evaporated in vacuo.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH191848T | 1937-08-14 | ||
| CH201833T | 1937-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH201833A true CH201833A (en) | 1938-12-15 |
Family
ID=25722180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH201833D CH201833A (en) | 1937-08-14 | 1937-08-14 | Process for the production of a new intermediate product. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH201833A (en) |
-
1937
- 1937-08-14 CH CH201833D patent/CH201833A/en unknown
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