Institut Francais Du Pe'trole

Fran&ccedil;oise Montecot

Larry Mank

G&eacute;rard Hotier

For co-production of metaxylene and paraxylene from a feedstock (line- ) of hydrocarbons, there is employed a simulated moving bed chromatographic column having at least five zones and which delivers an extract, a raffinate and an intermediate raffinate. The feedstock has an ethylbenzene content of less than 5% by weight, and the chromatographic column comprises at least twenty-five beds, of which at least five beds are in zone B. The raffinate is distilled ( ) to recover the metaxylene at a purity of at least 99% and orthoxylene. The extract is distilled ( ) to recover the paraxylene at a purity of at least 99.6%. The recovered isomers can be synthesized into isophthalic acid and terephthalic acid.

Growing community of inventors

Les Clayes Sous Bois, France

Françoise Montecot

Growing community of inventors

Les Clayes Sous Bois, France

Fran&ccedil;oise Montecot

Françoise Montecot