发明名称 |
Process for production of aromatic oligomers |
摘要 |
This invention relates to a process for preparing high-purity aromatic oligomers by effectively separating an organic layer containing aromatic oligomers or the reaction products of a polycyclic aromatic compound with formaldehyde from an aqueous layer containing an acid catalyst in a simplified manner, hitherto regarded difficult to accomplish, and obtaining high-purity aromatic oligomers from the organic layer containing a reduced amount of impurities. In separating the aqueous layer containing the acid catalyst and the organic layer containing the oligomers from the reaction mixture formed by the condensation of a polycyclic aromatic compound and formaldehyde, the emulsion phase is broken by adding a nonionic or cationic surfactant in an effective amount and an alkali in an amount sufficient to neutralize 1-70% of the acid in the acid catalyst, the organic and aqueous layers are separated and the aromatic oligomers are recovered from the organic layer.
|
申请公布号 |
US2004266976(A1) |
申请公布日期 |
2004.12.30 |
申请号 |
US20040496139 |
申请日期 |
2004.05.20 |
申请人 |
SENZAKI TOSHIHIDE;IMAMURA TAKAHIRO;HORIBE KAZUYOSHI;YOSHIDA TOMOAKI;KATAYAMA ATSUHIKO;WADA YASUO;NOGUCHI KATSUHIDE |
发明人 |
SENZAKI TOSHIHIDE;IMAMURA TAKAHIRO;HORIBE KAZUYOSHI;YOSHIDA TOMOAKI;KATAYAMA ATSUHIKO;WADA YASUO;NOGUCHI KATSUHIDE |
分类号 |
C08G10/02;(IPC1-7):C08G61/00 |
主分类号 |
C08G10/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|