| 摘要 |
Ethers are prepared by reacting isobutene with a primary or secondary saturated or unsaturated aliphatic, cycloaliphatic or araliphatic alcohol, which may be substituted, in the presence of a sulphonic acid group-containing cation exchange resin based on one or more vinyl aromatic polymers. The isobutene may be used in admixture with saturated and unsaturated hydrocarbons, e.g. the C4 fraction from the fractionation of cracked gasoline. The resin may be based on a copolymer of a monovinyl compound with an aromatic divinyl compound, the divinyl compound being in a proportion of from 1 to 20% by weight. The resin may be in the so-called H form. The reaction is preferably at 0 to 100 DEG C. and between 0 and 300 atmospheres pressure. Substituents which may be present in the alcohol are halogen, alkoxy, and carbonyl. Alcohols specified in examples are methanol, allyl alcohol, ethylene chlorohydrin, ethylene glycol monomethyl ether, benzyl alcohol, ethylene glycol, isopropanol, aldol. |
