HuagongsheHuagongshe Chemistry Print Report · For research reference only
Ammonia → 2-Amino-1-naphthalenesulfonic acid
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Ammonia | HCID 222 | — |
| Reactant | 1-Naphthalenesulfonic acid, 2-hydroxy- | HCID 11278 | — |
| Product | 2-Amino-1-naphthalenesulfonic acid | HCID 6670 | — |
Reaction Steps
treating the resultant aqueous solution of the ammonium salt of oxy-Tobias acid, without increasing the concentration beforehand, with NH3 and concentrated (NH4)2SO3 or (NH4)HSO3 solution in the temperature range from 120° to 150° C. and at a pressure of 10 to 20 bar for 4 to 12 hours until the pH value is 9 to 12, to give the ammonium salt of 2-amino-1-naphthalenesulfonic acid (Tobias acid), and, after stripping off NH3 and removal of 2-naphthylamine by extraction with an aromatic hydrocarbon,
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04510100 |
| Source dataset | uspto-grants-1985_04 |
| ORD ID | ord-494ce670d2294346bc357b4c55c7c0b5 |
| Source note | uspto-grants-1985_04 |