HuagongsheHuagongshe Chemistry Print Report · For research reference only
Formaldehyde → Aniline
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Formaldehyde | HCID 712 | — |
| Reactant | Aniline | HCID 6115 | — |
| Reactant | Diphenylmethane diisocyanate | HCID 7570 | — |
| Product | Aniline | HCID 6115 | — |
| Product | 4,4-Diaminodiphenylmethane | HCID 7577 | — |
Reaction Steps
A novel process for making 4,4'-methylene diphenyl diisocyanate and corresponding oligomer in improved selectivity and yield comprises condensing formaldehyde and aniline under neutral or basic conditions to yield an anil condensate, followed by reacting the anil condensate with additional aniline and a protonic salt of aniline to yield 4,4'-methylene dianiline and corresponding oligomer, then followed by conventional phosgenation.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US04297294 |
| Source dataset | uspto-grants-1981_10 |
| ORD ID | ord-d36ad017a1f24fb896ab3b56239cb53d |
| Source note | uspto-grants-1981_10 |