Abstract: An object of the present invention is to provide a process for purifying 2-methyladamantan-2-yl(meth)acrylate with high separation efficiency and an industrially advantageous preparation process of 2-methyladamantan-2-yl(meth)acrylate. The present invention pertains to a preparation process of 2-methyladamantan-2-yl(meth)acrylate which comprises reacting 2-methyleneadamantane and (meth)acrylic acid by an acid catalyst to obtain a reaction mixture, and then separating 2-methyleneadamantane from the reaction mixture to obtain 2-methyladamantan-2-yl(meth)acrylate, wherein the reaction mixture is distilled in the presence of an organic compound having a boiling point, under atmospheric pressure, of 150° C. or greater but not greater than 260° C.

Abstract: Crude (R)-4-cyano-3-hydroxybutyric acid lower alkyl ester, obtained by subjecting an (S)-4-halogeno-3-hydroxybutyric acid lower alkyl ester to a cyano-introducing reaction, is purified by distillation carried out in the presence of a solvent having a boiling point within the range of 50.degree. C. to 160.degree. C. at 10 Torr.

Abstract: A catalyst for conversion of carbon monoxide in water gas reaction, which comprises iron oxide, chromium oxide and magnesium oxide in the proportions of the from 40 to 85% by weight computed as Fe.sub.2 O.sub.3, from 12 to 45% by weight computed as Cr.sub.2 O.sub.3 and from 3 to 15% by weight computed as MgO, respectively.

Abstract: A process for producing an orthoalkylphenol which comprises reacting phenol with an olefin in a liquid phase in the presence of an alumina catalyst, characterized in that the water content in the liquid phase of the reaction system is maintained at a level of not higher than 250 ppm.