Process for the production of carboxylic anhydrides
    1.
    发明授权
    Process for the production of carboxylic anhydrides 失效
    制备羧酸酐的方法

    公开(公告)号:US5252752A

    公开(公告)日:1993-10-12

    申请号:US962982

    申请日:1992-10-16

    摘要: A process for the production of carboxylic anhydrides from aromatic hydrocarbons in gas phase oxidation by using a high activity and high selectivity fluid catalyst, comprising 50 to 95% by weight calculated as TiO.sub.2 +SiO.sub.2 +B.sub.2 O.sub.3 of component (A) which comprises titanium oxide, silicon dioxide and boron oxide and5 to 50% by weight calculated as V.sub.2 O.sub.5 +M.sub.2 O (M represents an alkali metal) +SO.sub.3 of component (B) comprising vanadium oxide, an alkali metal oxide and sulfuric anhydride, wherein weight ratios of B.sub.2 O.sub.3 to TiO.sub.2 and SiO.sub.2 to TiO.sub.2 in said component (A) are in the range of 0.02 to 0.5 and 0.25 to 1.0, respectively, is provided.

    摘要翻译: 一种通过使用高活性和高选择性流体催化剂在气相氧化中由芳族烃生产羧酸酐的方法,其包含以包含二氧化钛的组分(A)的TiO 2 + SiO 2 + B 2 O 3计算的50至95重量% 以氧化钒,碱金属氧化物和硫酸酐为原料的组分(B)的V 2 O 5 + M 2 O(M表示碱金属)+ SO 3计算为5〜50重量%,其中B 2 O 3与TiO 2的重量比 和所述组分(A)中的SiO 2与TiO 2分别在0.02至0.5和0.25至1.0的范围内。