发明名称 |
Low temperature purification of naphthalene dicarboxylic acids |
摘要 |
A process for purifying a naphthalenic carboxylic acid comprising contacting at a temperature below about 575° F. a mixture comprising an impure naphthalenic carboxylic acid and a solvent in the presence of hydrogen gas with a noble metal on carbon catalyst. The process results in reduced amounts of organic impurities in the purified acid when compared to other purification processes.
|
申请公布号 |
US6747171(B2) |
申请公布日期 |
2004.06.08 |
申请号 |
US20010775025 |
申请日期 |
2001.02.01 |
申请人 |
BP CORPORATION NORTH AMERICA INC. |
发明人 |
ROSEN BRUCE I. |
分类号 |
C07C51/47;C07C51/487;C07C63/38;(IPC1-7):C07C51/42;C07C51/16 |
主分类号 |
C07C51/47 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|