| 摘要 |
In order to produce a nitrile or cyclic anhydride derivative of a hydrocarbon, the hydrocarbon is reacted in the vapour phase in the presence of a catalyst with oxygen, and, if a nitrile is to be produced, ammonia in a partial oxidation reactor 2. A gaseous mixture including said derivative, carbon monoxide and carbon dioxide is produced. The derivative is then scrubbed out of the mixture in product removal means 8. Carbon dioxide is separated from the resulting gaseous mixture, preferably by pressure swing adsorption is separator 16. The carbon dioxide depleted gaseous product is recycled to the reactor 2 or its outlet (or both). The process is operated so as to maintain the total concentration of carbon monoxide and hydrocarbon present in all parts of the system sufficiently high (i.e. above the upper explosive limit) to prevent the existence of a flammable mixture in the process. <IMAGE> |
