Abstract:
Novel amorphous compositions possessing catalytic properties may be prepared by controlled calcination of synthetic crystalline precursor material structurally related to the mineral alunite, said precursor material being prepared and crystallized from an aqueous reaction mixture having a composition expressed in terms of mole ratios of oxides as Q G2O : a Al2O3 : b M2O3 : c SO4 : d XO4 : e H2O wherein ''''G'''' represents NH4 , H , Ag or any mixture thereof, wherein M2O3 represents at least one oxide selected from the group consisting of Fe2O3, Cr2O3, V2O3, La2O3, and Ce2O3; XO4 represents at least one oxide selected from the group consisting of PO4, MoO4, VO4. SiO4 and TlO4; ''''q'''' has a value of from 0.5 to 6.0; ''''a'''' has a value of from 1.5 to 4.0: ''''b'''' has a value of from zero to 2.0; ''''c'''' has a value of from 8.0 to 10.0; ''''d'''' has a value of from zero to 2.0; ''''e'''' has a value of from 100 to 1,000; the sum of ''''a'''' + ''''b'''' has a value not exceeding 4.0.
Abstract translation:具有催化性质的新型无定形组合物可以通过对结构上与矿物铝酸盐相关的合成结晶前体材料的可控煅烧来制备,所述前体材料由具有以氧化物摩尔比表示的组成的水性反应混合物制备并结晶,如Q G 2 O :Al 2 O 3 :b M 2 O 3 :c SO 4:d XO 4:e H 2 O其中“G”表示NH 4 +,H +,Ag +或其任何混合物,其中M 2 O 3表示选自以下的至少一种氧化物: 由Fe2O3,Cr2O3,V2O3,La2O3和Ce2O3组成; XO4表示选自PO4,MoO4,VO4中的至少一种氧化物。 SiO4和T104; “q”的值为0.5至6.0; “a”的值为1.5至4.0:“b”的值为零至2.0; “c”的值为8.0〜10.0; “d”的值为零到2.0; “e”的值为100到1,000; “a”+“b”的总和的值不超过4.0。
Abstract:
A novel catalyst composition for vapor-phase oxidation of butenes which is active at a temperature in the range from 250* to 450*C and capable of converting n-butenes and iso-butene selectively into 1,3-butadiene and methacrolein, respectively. The said catalyst composition contains tungsten, molybdenum, tellurium, antimony and oxygen, one combination selected from among (a) nickel and cobalt, (b) nickel and iron, (c) nickel, cobalt and bismuth and (d) nickel, iron and bismuth, and at least one member selected from the group consisting of potassium, rubidium and cesium. Phosphorus and/or tin may also be added to the catalyst composition.
Abstract:
Intimate dispersions of particulate aluminosilicates and refractory oxides are prepared in aqueous media in the presence of an oxygen containing amine followed by separation and drying of the resultant dispersion. The original aluminosilicate or refractory oxide can contain active components, stabilizing compositions and the like, as such or in a form that can be subsequently converted to such active components by thermal or chemical treatment. Similarly the dispersion of the aluminosilicate in the refractory oxide can be combined with catalytically active, stabilizing or otherwise chemically or physically modifying compositions.