Title:
A PROCESS FOR PRODUCING PURIFIED TEREPHTHALIC ACID
Document Type and Number:
WIPO Patent Application WO/2009/111951
Kind Code:
A1
Abstract:
Disclosed is a process for producing purified terephthalic acid, which employs new para-xylene (PX) oxidation technology to make the intermediate product, crude terephthalic acid (CTA) produced by oxidation does not contain two purities of 4-carboxybenzaldehyde (4-CBA) and para-toluic acid (PT acid), so that the factory processing operation of “purification” can be omitted. PTA product produced by the present process is more suitable to be used as the polymer raw material of food packaging material, beverage bottle material, medicament packaging material and medical appliance since the content of formaldehyde group thereof is extremely low and it has the advantages of being safer and having no poison.
Inventors:
ZHOU XIANGJIN (CN)
Application Number:
PCT/CN2009/000264
Publication Date:
September 17, 2009
Filing Date:
March 12, 2009
Export Citation:
Assignee:
ZHOU XIANGJIN (CN)
International Classes:
C07C51/265; B01J10/00; C07C63/26
Domestic Patent References:
| WO2007081507A2 | 2007-07-19 |
Foreign References:
| CN1395554A | 2003-02-05 | |||
| CN101111312A | 2008-01-23 | |||
| US4286101A | 1981-08-25 |
Other References:
WEIZHENG SUN: "Kinetics of Liquid-Phase Catalytic Oxidation of p-Toluic Acid.", CHEMICAL REACTION ENGINEERING AND TECHNOLOGY., vol. 23, no. 1, February 2007 (2007-02-01), pages 8 - 12
Attorney, Agent or Firm:
BEI JING SUN LIGHT LAW FIRM (Kuntai Building,No.10 Chao Wai St, Chaoyang District, Beijing 0, CN)
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