发明公开
EP1082286A1 METHOD FOR PREPARING PURIFIED TEREPHTHALIC ACID AND ISOPHTHALIC ACID FROM MIXED XYLENES
有权
基本信息:
- 专利标题： METHOD FOR PREPARING PURIFIED TEREPHTHALIC ACID AND ISOPHTHALIC ACID FROM MIXED XYLENES
- 专利标题（中）：纯对苯二酸的制备方法和间苯二甲酸OFF二甲苯混合物
- 申请号：EP99923195.4 申请日：1999-05-18
- 公开(公告)号：EP1082286A1 公开(公告)日：2001-03-14
- 发明人： LEE, Fu-Ming , LAMSHING, Wiston , WYTCHERLEY, Randi, Wright
- 申请人： HFM International, Inc.
- 申请人地址： 2020 South Dairy Ashford Houston, TX 77077 US
- 专利权人： HFM International, Inc.
- 当前专利权人： HFM International, Inc.
- 当前专利权人地址： 2020 South Dairy Ashford Houston, TX 77077 US
- 代理机构： Nash, David Allan
- 优先权： US87141P 19980529; US97930 19980616
- 国际公布： WO9962857 19991209
- 主分类号： C07C51/43
- IPC分类号： C07C51/43 ; C07C63/24 ; C07C63/26
摘要：
A method and apparatus for preparing purified terephthalic acid and, optionally, isophthalic acid from mixed xylenes. The method of the present invention purifies the oxidation reactor effluent containing a mixture of terephthalic acid and isophthalic acid as well as minor amounts of 4-carboxybenzaldehyde (4-CBA), 3-carboxybenzaldehyde (3-CBA), and toluic acid isomers, to produce purified terephthalic acid and, optionally purified isophthalic acid in an integrated process.
公开/授权文献:
IPC结构图谱:
| C | 化学；冶金 |
| --C07 | 有机化学 |
| ----C07C | 无环或碳环化合物 |
| ------C07C51/00 | 羧酸或它们的盐、卤化物或酐的制备 |
| --------C07C51/42 | .分离；纯化；稳定化；添加剂的使用 |
| ----------C07C51/43 | ..用物理状态的变化，例如结晶 |