Title:
PROCESS AND APPARATUS FOR PREPARING TEREPHTHALIC ACID BY AIR OXIDATION OF PARA-XYLENE
Document Type and Number:
WIPO Patent Application WO/2010/040251
Kind Code:
A1
Abstract:
Disclosed are a process and an apparatus for preparing terephthalic acid by air oxidation of para-xylene. Said process is: in a reaction system with oxidation reactor and crystallizer connecting in series, para-xylene with dissolved metalloporphyrins or mixed catalyst of metalloporphyrins and metal salt, and air, oxygen-poor air, oxygen-rich air or carbon-dioxide-containing air are fed into the oxidation reactor which stay in the reactor for 70-180 minutes at 140-200 °C. The oxidation mixture crystallizes by flooding or being pumped into crystallizer. Para-xylene, para-toluic acid and para-methyl benzyl alcohol obtained by separation are fed into oxidation reactor, mixed with para-xylene containing metalloporphyrins catalyst for the second oxidation, and the crystals are purified to obtain purified terephthalic acid. In the present invention para-xylene is oxidized directly into terephthalic acid, the energy consumption is low, the production efficiency is high, and the conversion of para-xylene and the yield of terephthalic acid are above 95%.
Inventors:
GUO, Cancheng (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
郭灿城 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
LUO, Weiping (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
罗伟平 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
ZHOU, Ranfei (301 Room, Fuduoxin FL. Qingyuan East Road,Huangcun,Daxing, Beijing 2, 102612, CN)
周然飞 (中国北京市大兴区黄村镇清源路东富多鑫商贸楼301室, Beijing 2, 102612, CN)
郭灿城 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
LUO, Weiping (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
罗伟平 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
ZHOU, Ranfei (301 Room, Fuduoxin FL. Qingyuan East Road,Huangcun,Daxing, Beijing 2, 102612, CN)
周然飞 (中国北京市大兴区黄村镇清源路东富多鑫商贸楼301室, Beijing 2, 102612, CN)
Application Number:
CN2008/001764
Publication Date:
April 15, 2010
Filing Date:
October 20, 2008
Export Citation:
Assignee:
HUNAN UNIVERSITY (No. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
湖南大学 (中国湖南省长沙市麓山南路2号, Hunan 2, 410082, CN)
BEIJING CHINA BROAD ZHIYUAN INSTITUTE OF CHEMICAL ENGINEERING & ELECTRONICS (301 Room, Fuduoxin FL. Qingyuan East Road,Huangcun,Daxing, Beijing 2, 102612, CN)
北京华博致远化工电子研究所 (中国北京市大兴区黄村镇清源路东富多鑫商贸楼301室, Beijing 2, 102612, CN)
GUO, Cancheng (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
郭灿城 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
LUO, Weiping (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
罗伟平 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
湖南大学 (中国湖南省长沙市麓山南路2号, Hunan 2, 410082, CN)
BEIJING CHINA BROAD ZHIYUAN INSTITUTE OF CHEMICAL ENGINEERING & ELECTRONICS (301 Room, Fuduoxin FL. Qingyuan East Road,Huangcun,Daxing, Beijing 2, 102612, CN)
北京华博致远化工电子研究所 (中国北京市大兴区黄村镇清源路东富多鑫商贸楼301室, Beijing 2, 102612, CN)
GUO, Cancheng (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
郭灿城 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
LUO, Weiping (College of Chemistry and Chemical Engineering, Hunan UniversityNo. 2 Lushan South Road, Changsha, Hunan 2, 410082, CN)
罗伟平 (中国湖南省长沙市麓山南路2号湖南大学化学化工学院, Hunan 2, 410082, CN)
International Classes:
C07C51/265; B01J8/00; B01J10/00; C07C63/26
Attorney, Agent or Firm:
CHANGSHA ZONEKEY PATENT LAW FIRM (59 Bayi Road, Changsha, Hunan 1, 410001, CN)