公开(公告)号：JPS55122787A

公开(公告)日：1980-09-20

申请号：JP2861579

申请日：1979-03-14

Applicant: MITSUI TOATSU CHEMICALS

Inventor： HASHIMOTO MASAO ,  MATSUDA FUJIO ,  TOYODA TOSHIHIRO

IPC: C07D493/04 ,  B01J23/00 ,  B01J23/22 ,  B01J23/26 ,  B01J27/02 ,  B01J27/18 ,  C07B61/00

Abstract: PURPOSE:To prepare the title compound useful as an intermediate of heat-resistant resins, by contacting a pentaalkylbenzene, a hexa-alkylbenzene, and/or their derivatives, with oxygen-containing gas in the presence of a vapor-phase oxidation catalyst. CONSTITUTION:One or more compounds selected from the compounds of formulae I and II (R1-6 are 1-4C alkyl, halogenated alkyl, hydroxyalkyl, alkoxyalkyl, formylalkyl, caroxyalkyl, acetonyl, or acetyl) are brought into contact with an oxygen- containing gas (e.g. air) in the presence of a vapor-phase oxidation catalyst (e.g. vanadium oxide), to obtain pyromellitic anhydride. The molar ratio of the polyalkylbenzene to O2 is pref. 1 to 100-10,000, and the reaction temperature is 300- 650 deg.C. EFFECT:The objective compound can be prepared in high yield, by the direct, one- step reaction.

公开(公告)号：JPS5439030A

公开(公告)日：1979-03-24

申请号：JP10416577

申请日：1977-09-01

Applicant: MITSUI TOATSU CHEMICALS

Inventor： TOYODA TOSHIHIRO ,  MATSUDA FUJIO

IPC: C07B61/00 ,  B01J31/00 ,  B01J31/02 ,  C07C67/00 ,  C07C201/00 ,  C07C205/37

Abstract: PURPOSE:To prepare title compounds directly in one step and in high yield with little formation of tarry by-products having high boiling points by reacting dinitrobenzenes with alkali metal alcoholates in the presence of macro ring polyethers in polar solvents.