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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| Main Author | |
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| Format | Patent |
| Language | English |
| Published |
22.03.2006
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| Subjects | |
| Online Access | Get full text |
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| Abstract | 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. |
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| AbstractList | 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. |
| Author | JINLONG,SU CHEN |
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| RelatedCompanies | NANJING UNIVERSITY |
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| Snippet | The present invention discloses a method for recovering hydroxybenzoic acid from hydroxybenzoic acid waste water. Which subjects hydroxybenzoic acid production... |
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| Title | Method for recovering p-hydroxybenzoic acid from water drain of production of p-hydroxybenzoic acid |
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