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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1576127Generated: November 4, 2026

Toluene → Phenyl isocyanate

https://huagongshe.com/reaction/1576127

Reaction equation

Participants

RoleNameHCIDCharge
ReactantTolueneHCID 1140—
ReactantNitrosobenzeneHCID 11473—
ReactantHCID 178418416HCID 178418416—
CatalystRhodium chlorideHCID 24872—
CatalystCobalt(II) iodide, anhydrousHCID 419951—
ProductPhenyl isocyanateHCID 767229%

Reaction Conditions

Temperature200 °C

Reaction Steps

The autoclave was charged with 10.0 grams of nitroso benzene, 63 grams (73 ml.) of toluene, 0.5 grams of rhodium trichloride, and 0.5 grams of anhydrous cobalt iodide. The autoclave was closed and then charged with sufficient carbon monoxide to increase the pressure to 1400 psig. The autoclave was heated to a temperature of 200°C. for 2 hours. After cooling the autoclave was vented, the contents filtered and the filtrate was analyzed by vapor phase chromotography. The product contained 3.2 grams of phenyl isocyanate, which corresponded to a corrected yield of 29 percent phenyl isocyanate.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS03979427
Source datasetuspto-grants-1976_09
ORD IDord-be54a3922de94ded8a31102e0b55de56
Source noteuspto-grants-1976_09