| 摘要 |
Ethyl alcohol substantially free from ether is produced by treating a mixture of ethylene and steam with an aqueous inorganic acid, such as sulphuric or phosphoric acid, of 15 to 60 per cent strength at elevated temperature and substantially above atmospheric pressure. The pressure may be from 200 to 600 lb. or higher and the temperature 170--300 DEG C. The acid may contain filling materials to facilitate intimate contact, or may be absorbed in suitable carriers such as pumice or silica gel. Small quantities of promoters such as silver, silver sulphate or lithium sulphate may be added to the acid. In an example, a mixture of one part of ethylene and two parts of steam is passed through sulphuric acid at 250 DEG C. and 600 lb. pressure. Specifications 368,051 and 370,136 are referred to. The Specification as open to inspection under Sect. 91 includes the treatment of other alkylene hydrocarbons such as propylene and butylene, and states that when ether is produced as well as alcohol, it may be recirculated with the excess olefine after condensation of the alcohol or may be condensed in a second condenser maintained at a lower temperature than that in which the alcohol is condensed. The use of pressures of one to several thousand pounds is mentioned, and an example describes the treatment of ethylene and steam with 30 per cent sulphuric acid at 255--260 DEG C. and 1000 lb. pressure. This subject-matter does not appear in the Specification as accepted.
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