| 摘要 |
<p>1464198 Maleic anhydride by oxidation; regeneration of catalyst MOBIL OIL CORP 28 Aug 1975 [11 Nov 1974] 35576/75 Heading C2C [Also in Division B1] In the preparation of maleic anhydride by vapour phase oxidation of a feedstock consisting of or comprising one or more C 4-10 alkanes and/or one or more C 4-10 cycloalkanes, with O 2 in the presence of a V-P catalyst complex promoted with Zr, Hf, Cr, Fe, La or C, the catalyst is regenerated by contacting it, during the vapour phase oxidation, on orthophosphate (RO) 3 PO where R is H or C 1-4 alkyl, at least one R being alkyl.</p> |
