Method for recovering p-hydroxybenzoic acid from water drain of production of p-hydroxybenzoic acid

The present invention discloses a method for recovering hydroxybenzoic acid from hydroxybenzoic acid waste water. Which subjects hydroxybenzoic acid production waste water discharged during production (which contains about 2700 mg/l hydroxybenzoic acid and 1300 mg/l phenol) to NDA-101 macroporous ab...

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Bibliographic Details
Main Author JINLONG,SU CHEN
Format Patent
LanguageEnglish
Published 22.03.2006
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:The present invention discloses a method for recovering hydroxybenzoic acid from hydroxybenzoic acid waste water. Which subjects hydroxybenzoic acid production waste water discharged during production (which contains about 2700 mg/l hydroxybenzoic acid and 1300 mg/l phenol) to NDA-101 macroporous absorption resin bed, thereby hydroxybenzoic acid and phenol are absorbed onto the resin, realizing an efficient seperation of hydroxybenzoic acid and water phase. Then elutes the resin with diluted alkali solution, the resulting eluent containing hydroxybenzoic acid and small amount of phenol can return to the acidolysis procedure directly for recovery, and the resin can be reused after elution.
Bibliography:Application Number: CN200410041229