Purification method of crude benzene

Abstract

Abstract PURPOSE:To purify crude benzene containing n-heptane and water, by removing water selectively with the first adsorbent from the crude benzene, removing the n-heptane with the second adsorbent, and heating both adsorbents to desorb the water and n-heptane. CONSTITUTION:A crude benzene 1 containing n-heptane and water is brought into contact with the first adsorbent 3 packed the first adsorber 5, capable of selectively adsorbing the water at 1-20cm/min linear velocity and 10-50 deg.C under ordinary pressure to remove the water selectively, and then the crude benzene is then fed to the second adsorber 11 packed with the second adsorbent 9 having the adsorptivity for the n-heptane and brought into contact with the second adsorbent 9 at 1-20cm/min linear velocity and 10-50 deg.C under ordinary pressure to remove the n-heptane, The first adsorbent 3 is then heated to desorb the water, and the second adsorbent 9 is heated to reduce the pressure of the interior of the second adsorber 11. Thus, the adsorbent 9 is regenerated to take out the purified benzene from a line 13 to the outside of the system. EFFECT:The regeneration time and the necessary energy can be reduced. The life of the adsorbent can be prolonged, and the amount thereof to be used is reduced.

Inventors

• 👤 Koichi Kono
• 👤 河野　光一
• 👤 Hideki Akinaga
• 👤 秋永　英毅
• 👤 Yasushige Watanabe
• 👤 渡辺　安重
• 👤 Tetsuya Tanaka
• 👤 徹也 田中

Bibliographic Details