US Patent 7393983 Method and apparatus for separating aromatic dialdehyde

Patent 7393983 was granted and assigned to LG Chem on July, 2008 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

LG Chem

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7393983

Date of Patent

July 1, 2008

Patent Application Number

11430201

Date Filed

May 9, 2006

Patent Primary Examiner

‌

Sikarl A. Witherspoon

Patent abstract

The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of congealing aromatic dialdehyde by cooling the gas-phase reaction mixture including the aromatic dialdehyde, which is obtained by gas-phase oxidation of dimethylbenzene, to 5-70° C. and separating the congealed aromatic dialdehyde from the remaining reaction mixture. Using the method and apparatus in accordance with the present invention, aromatic dialdehyde can be effectively and selectively separated from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene in high yield.

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