Process for producing high purity meta-xylene, comprising...

Details Process for producing high purity meta-xylene, comprising... Process for producing high purity meta-xylene, comprising...

2011-04-19

2011-04-19

Nguyen, Tam M (Department: 1771)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By contact with solid sorbent

C585S820000, C585S826000, C585S812000

Reexamination Certificate

active

07928276

ABSTRACT:
The invention concerns a process for producing high purity meta-xylene, comprising a step for separation by simulated moving bed adsorption starting from an aromatic C8 feed delivering a fraction which is rich in meta-xylene and a fraction which is depleted in meta-xylene, and a step for crystallization of the meta-xylene rich fraction. The purity of the meta-xylene produced is at least 99.5%.

REFERENCES:
patent: 3773846 (1973-11-01), Berger
patent: 4326092 (1982-04-01), Neuzil
patent: 5382747 (1995-01-01), Kulprathipanja
patent: 6147272 (2000-11-01), Mikitenko et al.
patent: 2003/0069461 (2003-04-01), Leflaive et al.
patent: WO 99/64381 (1999-12-01), None

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