HuagongsheHuagongshe Chemie-Druckbericht · Nur für Forschungszwecke
Hydrochloric Acid → 4-Aminobenzoic Acid
Beteiligte Stoffe
| Rolle | Name | HCID | Einwaage |
|---|---|---|---|
| Edukt | Hydrochloric Acid | HCID 313 | — |
| Edukt | Sodium Carbonate | HCID 10340 | — |
| Edukt | Sodium Dithionite | HCID 24489 | — |
| Edukt | 2,4-Dichloro-3-methyl-5-nitrobenzoic acid | HCID 13657443 | — |
| Lösungsmittel | Water | HCID 962 | — |
| Lösungsmittel | 2-Methoxyethanol | HCID 8019 | — |
| Produkt | 4-Aminobenzoic Acid | HCID 978 | — |
Reaktionsschritte
55 g of 2,4-dichloro-3-methyl-5-nitrobenzoic acid and 141.6 g of Na2S2O4 are boiled in a mixture of 440 ml of glycol monomethyl ether and 440 ml of water for 3 hours. 620 ml of 1/2-concentrated HCl are added to the still warm solution and the mixture is then boiled up once more. After cooling to room temperature, the mixture is poured into 1.5 l of water and brought to pH 5 with sodium carbonate. 24.6 g of aminobenzoic acid are obtained. Melting point: 202°-3°.
Herkunft & Nachweise
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patentnummer | US04762844 |
| Quelldatensatz | uspto-grants-1988_08 |
| ORD ID | ord-5b626c226c2642a5a780bd9dbe3f6026 |
| Quellennotiz | uspto-grants-1988_08 |