Title:
液相酸化により芳香族ポリカルボン酸を調製する方法
Document Type and Number:
Japanese Patent JP5897243
Kind Code:
B2
Abstract:
The invention relates to a process for preparing an aromatic polycarboxylic acid by liquid phase oxidation of a di- or tri-substituted benzene or naphtalene compound, the process comprising a step of contacting the aromatic compound with an oxidant in the presence of a carboxylic acid solvent, a metal catalyst and a promoter in a reaction zone, wherein the promoter is an ionic liquid comprising an organic cation and a bromide or iodide anion. Advantages of this process include high conversion without severe corrosion problems otherwise associated with halogen-containing compounds as promoter. The process does not necessitate the use of special corrosion-resistant material or liners in the process equipment; thus offering savings on investment and maintenance costs and increasing plant reliability. The process of the invention is especially suited for production of terephthalic acid from p-xylene.
Inventors:
Hashmi, Sied Azhar
Al-Le Haidan, Sulaiman
Al-Le Haidan, Sulaiman
Application Number:
JP2009541881A
Publication Date:
March 30, 2016
Filing Date:
December 18, 2007
Export Citation:
Assignee:
Saudi Basic Industries Corporation
International Classes:
C07C51/265; C07B61/00; C07C63/26
Domestic Patent References:
| JP2138150A | ||||
| JP7247239A |
Other References:
酒井 俊人 外2名「イオン性液体」,住友化学,2003-II(2003)p.26-34
Attorney, Agent or Firm:
Yanagita Seiji
Go Sakuma
Go Sakuma