Patent ID: 9550133
Date: 2017-01-24
CPC Classifications: B01D,C07C

Claim:
1. An apparatus for separating and recovering Pseudocumene from a raw mixture containing aromatic hydrocarbons with nine carbon atoms, said apparatus comprising: a first chamber and a second chamber, said first chamber adapted to receive said raw mixture; a first feed means for feeding said first chamber with said raw mixture; a first top extraction means for extracting a first overhead vapour fraction from said first chamber; a first bottom extraction means for extracting a first bottom fraction from said first chamber; a second feed means for feeding said second chamber with a stream selected between a portion of said first overhead vapour fraction and a portion of said first bottom fraction; a second top extraction means for extracting a second overhead vapour fraction from said second chamber; a second bottom extraction means for extracting a second bottom fraction from said second chamber; a maintenance means for maintaining said first chamber and said second chamber within predetermined working temperature ranges and at predetermined respective operating pressures; wherein said maintenance means is adapted to maintain working temperature range and/or operating pressures such that: said Pseudocumene is present substantially in only one fraction selected between said first overhead fraction and said first bottom fraction, and a substantially pure Pseudocumene is contained only in one fraction selected between said second overhead fraction and said second bottom fraction, according to whether said Pseudocumene-containing fraction that is extracted from said first longitudinal chamber is said first bottom fraction or said first overhead fraction, respectively, wherein said apparatus comprises an elongated container that is adapted to be arranged vertically, an inner longitudinal partition wall arranged within said elongated container, said inner longitudinal partition wall defining said first chamber and said second chamber within said elongated container, a differential expansion compensation means arranged between said elongated container and said inner partition wall for compensating differential expansion due to a temperature difference between said first chamber and said second chamber, wherein said partition wall is internally fixed to a shell of said vertical elongated container at a short edge portion extension of said partition wall, and wherein other edge portions of said partition wall are arranged to have a relative freedom of movement with respect to said shell, and to allow an expansion of said partition wall with respect to said shell.