To reduce the energy consumption for manufacturing aromatic hydrocarbons.
In an aromatic hydrocarbon manufacturing apparatus including: a first distiller for obtaining a C8+ aromatic-rich fraction and a lighter component-rich fraction; a second distiller for obtaining, from the C8+ aromatic-rich fraction, a C8 aromatic-rich fraction and a C9+ aromatic-rich fraction; an adsorption separator for obtaining, from the C8 aromatic-rich fraction, a p-xylene-containing extract and a xylene isomer-containing raffinate; a third distiller for obtaining, from the extract, a p-xylene-rich fraction and a desorber-rich fraction; and a fourth distiller for obtaining, from the raffinate, a xylene isomer-rich fraction and a desorber-rich fraction, the second distiller includes: a high-pressure block including a concentrating unit and inducing a vapor-liquid contact at a higher pressure; a low-pressure block including a recovery unit and inducing a vapor-liquid contact at a lower pressure; a line for introducing a low-pressure block column top vapor into a high-pressure block column bottom; a line for introducing a high-pressure block column bottom liquid into the low-pressure block column top; and a heat exchanging structure for transferring heat from the concentrating unit into the recovery unit.
WAKABAYASHI TOSHIHIRO
| US20120048711A1 | 2012-03-01 | |||
| US20120048720A1 | 2012-03-01 | |||
| WO2011043199A1 | 2011-04-14 |
Ishibashi Masayuki
Masaaki Ogata