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Isopropyl Alcohol from Propene and Water
Isopropyl alcohol is made mainly by adding water to propene (propylene). In direct hydration, more common in Europe, propene of over 90 % purity and water react at high pressure over a solid acid catalyst. (The indirect route, common in the USA, goes through sulphate esters made with sulphuric acid, and a third route hydrogenates acetone.) The alcohol is then separated by distillation, but isopropyl alcohol and water form an azeotrope: plain distillation stops at 87.9 % alcohol and 12.1 % water. Dry alcohol is made by azeotropic distillation with an entrainer such as cyclohexane.
高级
Continuous (industrial)
说明
1
1
Hydrate
Hydrate
Feed propene (over 90 % pure) and water into the reactor at high pressure over the solid acid catalyst.
此步骤所需材料：
丙烯（丙烯气）1 as required
水1 as required所需工具：
高压水合反应器
固体酸催化剂2
2
Distil
Distil
Distil the product to separate the alcohol from water and by-products; it comes over as the azeotrope, 87.9 % isopropyl alcohol.
所需工具：
蒸馏塔装置3
3
Dry
Dry
Distil again with cyclohexane as the entrainer to carry the remaining water off and leave dry isopropyl alcohol.
此步骤所需材料：
环己烷1 as required所需工具：
蒸馏塔装置此蓝图制作
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