| 摘要 |
<p>1,219,236. Allyl and methallyl chlorides. FARBWERKE HOECHST A.G. 8 April, 1969 [19 April, 1968], No. 17817/69. Heading C2C. Allyl chloride or methallyl chloride is prepared by reacting allyl acetate or methallyl acetate with hydrogen chloride in the presence of a catalyst comprising a mixture of a copper salt and a Lewis acid, at a temperature of 20‹ to 200‹ C., preferably above 45‹ C. The catalyst mixture is preferably used in an amount of 0.01 to 10% by weight based on the allyl or methallyl acetate. Exemplified Lewis acids are iron (III), aluminium, titanium (IV), beryllium, zirconium (IV), antimony (V), bismuth (III) and zinc chlorides and aluminium bromide, and specified copper salts are the chlorides, bromides, sulphates and acetates. The acetate starting material may be in the liquid or gaseous phase.</p> |
