PRODUCTION OF ALDEHYDE AND KETONE OR ITS DERIVATIVE, PRODUCTION OF X-RAY AMORPHOUS ZINC SILICATE, ROENTGENAMORPH ZINC SILICATE, ITS PRODUCTION AND ITS USE AS CATALYST

摘要

PROBLEM TO BE SOLVED: To safely obtain the subject compound, by adding a hydroxyl group- containing compound to an alkyne, etc., in the presence of a roentgenamorph zinc silicate catalyst, etc. SOLUTION: A compound of the formula R1 OH (R1 is H, an aliphatic or alicyclic group) is added to an acetylene or allene of formula I or formula II (R is H, an aliphatic or alicyclic group) in a gas phase by using a catalyst containing a zinc silicate as an active ingredient obtained by precipitation from an aqueous solution comprising a soluble silicon compound and zinc compound to give the objective compound of formula III or formula IV ((m) is 0 or 1). The zinc silicate is X-ray amorphous zinc silicate of the formula Zna Sic Oa+2c-0.5e (OH)e .fH2 O ((e) is a value from 0 to 2a+2c; a/c is 1-3.5 and f/a is 0 to 200) and/or a crystal zinc silicate having a hemimorphite structure of the formula Zn4 Si2 O7 ) (OH)2 .H2 O. Zinc exists in a deficient amount or an excessive amount of 25% in terms of stoichiometric composition.