Evaluation method null expression of haidorotarusaito based hydration metal chemical compound and the production manner, and the addition reaction catalytic converter, and this catalytic converter of the alkylene oxide which calcines this

摘要

PROBLEM TO BE SOLVED: To obtain a catalyst which is excellent in a reaction rate and reaction selectivity in the additional reaction of alkylene oxide.;SOLUTION: Magnesium hydroxide or basic or neutral magnesium carbonate as a magnesium source and aluminum hydroxide as an aluminum source are brought into hydrothermal reaction at 120 to 300°C to obtain a hydrotalcite based hydrated metallic compound. The obtained hydrotalcite based hydrated metallic compound is fired at 400 to 800°C into a catalyst for the additional reaction of alkylene oxide to an active hydrogen atom-containing compound. Further, a storing base titration agent of 0.1 to 10 mol/L is dropped to a suspension obtained by adding a hydrotalcite based hydrated metallic compound to an acid aqueous solution prepared to a standard concentration of 0.001 to 0.1 mol/L so that the concentration of 0.05 to 2 wt.% can be obtained, and the pH of the suspension is measured by potentiometric titration with a glass electrode. In this case, the performance of the catalyst is evaluated from the consumption of hydroxide ions required to an inflection point of pH=10.3 from pH=7.;COPYRIGHT: (C)2004,JPO