WERKWIJZE TER BEREIDING VAN STYREEN DOOR DEHYDRATERING VAN ALFA-METHYLBENZYLALCOHOL

摘要

1343177 Styrene SHELL INTERNATIONALE RESEARCH MAATSCHAPPI NV 20 Sept 1971 [21 Sept 1970] 43720/71 Heading C5E Styrene is prepared by catalytically dehydrating α-methylbenzyl alcohol in the vapour phase, in the absence of nitrogen, by contact with an oxide-containing dehydration catalyst or a temperature above 260‹ C., 0À1-4 moles of steam per mole of feed being introduced into the dehydration zone. The feed may contain 0-60 wt. per cent acetophenone. The catalyst may be SiO 2 , TiO 2 , V 2 O 5 or, preferably, Al 2 O 3 , which may be regenerated by stopping the flow of feedstock and passing a liquid aromatic such as ethylbenzene over the catalyst.