申请人:Council of Scientific and
Industrial Research
公开号:EP0225407A1
公开(公告)日:1987-06-16
Lanthanum silicate catalyst composites having, in terms of oxide mole ratios, the composition:
0 - 0.3 M₂O : La₂O₃ : 30-200 SiO₂
in which M is a monovalent cation. Such catalyst composites are made by reacting a lanthanum compound, an alkali metal compound and a silicon compound with a tetraalkyl ammonium salt of the formula:
R¹xR²yN⁺Z
in which R¹ and R² are C₂-C₄ alkyl groups, x and y are integers from 1 to 3 such that x + y is 4, and Z is a bromide or hydroxide ion, in an aqueous sulphuric acid medium to form a gel, heating the gel at a temperature of 100°C to 200°C, and filtering, drying and calcining the resulting solid material.
These materials are effective catalysts for the conversion of lower alcohols to lower olefins.
硅酸镧催化剂复合材料,其氧化物摩尔比组成如下
0 - 0.3 M₂O : La₂O₃ : 30-200 SiO₂
其中 M 为一价阳离子。这种催化剂复合材料是通过将镧化合物、碱金属化合物和硅化合物与式中的四烷基铵盐反应制成的:
R¹xR²yN⁺Z
其中 R¹ 和 R² 为 C₂-C₄烷基,x 和 y 为 1 至 3 的整数,使得 x + y 为 4,Z 为溴离子或氢氧根离子,在含水硫酸介质中形成凝胶,在 100°C 至 200°C 的温度下加热凝胶,并过滤、干燥和煅烧所得固体材料。
这些材料是低级醇转化为低级烯烃的有效催化剂。