HuagongsheHuagongshe Chemistry Print Report · For research reference only
Formaldehyde → HCID 66680619, compound
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Formaldehyde | HCID 712 | — |
| Reactant | Aniline | HCID 6115 | — |
| Reactant | Nitrobenzene | HCID 7416 | — |
| Reactant | Benzylbenzene diisocyanate | HCID 19824838 | — |
| Solvent | Benzene | HCID 241 | — |
| Product | HCID 66680619 | HCID 66680619 | — |
Reaction Steps
The invention relates to a process for preparation and distillative workup of diphenylmethane diisocyanate, referred to hereinafter as MDI for short, proceeding from a benzene-comprising feed stream, in which benzene is nitrated to nitrobenzene which is hydrogenated to aniline, aniline is reacted with formaldehyde to give methylenediphenylamine (MDA) and MDA is phosgenated to MDI. In this process, not the pure products but at first product mixtures are obtained in each process step, which are purified before further processing.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US08703997B2 |
| Source dataset | uspto-grants-2014_04 |
| ORD ID | ord-362ece2e443f40339bab5b3cf4b70378 |
| Source note | uspto-grants-2014_04 |