| 摘要 |
1476534 Hydration of olefins to alcohols and ethers NATIONAL DISTILLERS & CHEMICAL CORP 14 Jan 1975 [14 Jan 1974] 1572/75 Heading C2C [Also in Division B1] Olefins are hydrated in the vapour phase to give the corresponding alcohols or ethers in contact with a catalyst comprising phosphoric acid impregnated into high-silica glass beads of specified physical properties (see Division B1). Specified feeds are propylene, butylene and ethylene, the last to give ethanol and diethyl ether. Hydration conditions specified include 235-350‹ C., a pressure of 500-1500 p.s.i., a mole ratio of water/olefin of 0À4-2À0 and a feed rate of 5-100 SCM/feet<SP>3</SP>. The examples describe the hydration of ethylene to ethanol and ether (Examples 1-3) and the hydration of propylene to isopropanol and isopropyl ether (Example 4). The ether product may be separated in a stripper column leaving a dilute alcohol solution which may be further hydrogenated to convert by-product carbonyl groups or unsaturated compounds such as acrolein to alcohols, followed by recovery of alcohol by distillation. |
