| 摘要 |
<p>PURPOSE:The expoxidation of an olefin with hydrogen peroxide is conducted in the presence of an arsenic compound in a solvent of which the whole part or a part is an organic carboxylic acid to produce the titled substance at a high reaction rate in high selectivity. CONSTITUTION:When an olefin is epoxidized with hydrogen peroxide in the presence of an arsenic compound, an organic carboxylic acid is used as a part or the whole part of the solvent. The organic carboxylic acid is, e.g., an aliphatic monobasic acid, polybasic acid, aromatic monobasic acid or polybasic acid, however, a preferable example is acetic acid or propionic acid. The solvent miscible therewith is preferably an aromatic compound such as benzene, halogenated hydrocarbon or alcohol. The catalyst is elementary arsenic, or inorganic or organic arsenic compound such as phenylarsonic acid. The concentration of hydrogen peroxide is preferably 60-90%.</p> |
