Process for pre-treating waste liquid of p-benzoic acid by complexing and extraction
Title：
Process for pre-treating waste liquid of p-benzoic acid by complexing and extraction
Application Number：
 00129794
Application Date：
 2000/10/13
Announcement Date：
 2001/04/04
Pub. Date：
Publication Number：
 1289725
Announcement Number：
 1119286
Grant Date：
Granted Pub. Date：
 2003-8-27
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C02F 1/26
Applicant(s)：
 Qinghua Univ.
Inventor(s)：
 Li Zhenyu, Qiu Wei, Dai Youyuan
Key Words：
 pre-treating, waste liquid, p-benzoic acid, complexing, extraction
Abstract：
 A process for pre-treating waste solution of benzoic acid includes such steps as preparing extractant from complexing agent, cosolvent and diluent, multi-stage extracting at ordinary-temp until its chemical oxygen consumption value conforms with discharge standard, and sampling analysis of COD cr, pH value and water-phase hydrogen ion concentration at each stage. It can be used to recover phenol, phenylamine and organic acid.
Claim：
Priority：
PCT：
LegalStatus：

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