| 摘要 |
1,228,243. Catalytic mineral fibres. SOC. GENERAL DES PRODUITS REFRACTAIRES. 10 April, 1968 [10 April, 1967], No. 17324/68. Heading B1E. [Also in Division C1] Catalytic mineral fibres containing at least 70% of Al 2 O 3 , up to 20% of at least one catalyst distributed within the mass of each fibre in the spaces between the crystal grains and/or syncrystallised in the crystalline lattice, of the Al 2 O 3 , less than 5% of at least one recrystallisation inhibitor and less than 30% of at least one refractory oxide other than Al 2 O 3 or the recrystallisation inhibitor(s), the fibres having a specific B.E.T. surface of at least 70m<SP>2</SP>/gm, maintained up to temperatures of at least 1050‹C. Specified catalysts are Pt, Ni, Co, Fe, Ce and recrystallisation inhibitors may be provided by Ca<SP>++</SP>, Mg<SP>++</SP>, Zr<SP>++</SP>, SO 4 '', SiO 3 " or BO 2 '. Other refractory oxides mentioned are SiO 2 , CaO and ZrO 2 . |
