Shanxian Chemical
SUPPLEMENTS
Prepare Diisopropyl Ether as Major Product
The method of preparing diisopropyl ether with isopropyl alcohol as the main product
To obtain diisopropyl ether as the main product, isopropyl alcohol can be used as the raw material. First, the isopropyl alcohol undergoes an intermolecular dehydration reaction under the action of an appropriate catalyst.
Concentrated sulfuric acid is often used as the catalyst and the reaction is carried out at a suitable temperature. Place the isopropyl alcohol in the reaction vessel, slowly add an appropriate amount of concentrated sulfuric acid, and mix well. Control the reaction temperature between about 130-140 ° C.
Under this condition, the hydroxyl groups between the isopropyl alcohol molecules combine with the hydrogen atoms of the adjacent isopropyl alcohol molecules to form water and dehydrate, and then generate diisopropyl ether. The reaction process is as follows: two molecules of isopropyl alcohol, the oxygen atom of the hydroxyl group in one molecule attacks the hydrogen atom on the carbon atom connected to the hydroxyl group in the other molecule of isopropyl alcohol. Concentrated sulfuric acid assists this process, causing the water molecule to leave, and the two parts combine to form diisopropyl ether.
After the reaction is completed, the reaction mixture is processed. First, the remaining concentrated sulfuric acid is neutralized with alkali solution such as sodium hydroxide solution to avoid acid corrosion to the equipment during subsequent operations. After that, the liquid is separated to separate the organic phase. The organic phase is purified by distillation and other methods, and the fraction of the corresponding boiling point range of diisopropyl ether is collected. Finally, higher purity diisopropyl ether can be obtained as the main product.
To obtain diisopropyl ether as the main product, isopropyl alcohol can be used as the raw material. First, the isopropyl alcohol undergoes an intermolecular dehydration reaction under the action of an appropriate catalyst.
Concentrated sulfuric acid is often used as the catalyst and the reaction is carried out at a suitable temperature. Place the isopropyl alcohol in the reaction vessel, slowly add an appropriate amount of concentrated sulfuric acid, and mix well. Control the reaction temperature between about 130-140 ° C.
Under this condition, the hydroxyl groups between the isopropyl alcohol molecules combine with the hydrogen atoms of the adjacent isopropyl alcohol molecules to form water and dehydrate, and then generate diisopropyl ether. The reaction process is as follows: two molecules of isopropyl alcohol, the oxygen atom of the hydroxyl group in one molecule attacks the hydrogen atom on the carbon atom connected to the hydroxyl group in the other molecule of isopropyl alcohol. Concentrated sulfuric acid assists this process, causing the water molecule to leave, and the two parts combine to form diisopropyl ether.
After the reaction is completed, the reaction mixture is processed. First, the remaining concentrated sulfuric acid is neutralized with alkali solution such as sodium hydroxide solution to avoid acid corrosion to the equipment during subsequent operations. After that, the liquid is separated to separate the organic phase. The organic phase is purified by distillation and other methods, and the fraction of the corresponding boiling point range of diisopropyl ether is collected. Finally, higher purity diisopropyl ether can be obtained as the main product.
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