FIELD: chemistry.
SUBSTANCE: invention relates to a method of concentrating pyrocatechol from aqueous solutions, which includes concentrating pyrocatechol from aqueous solutions acidified to pH=1-5 at temperature of 20±2°C with an organic solvent. The organic solvent used is tributyl phosphate in hexane, which is deposited on elastic polyurethane foam with weight ratio of the elastic polyurethane foam to tributyl phosphate of 1:(0.5-0.75).
EFFECT: method increases the concentration factor and degree of extraction of pyrocatechol and reduces consumption of the organic solvent.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF CONCENTRATING PYROGALLOL FROM AQUEOUS SOLUTIONS | 2014 |
|
RU2568121C1 |
| METHOD OF CONCENTRATING PYROGALLOL FROM AQUEOUS SOLUTIONS | 2011 |
|
RU2471764C1 |
| METHOD OF CONCENTRATING RESORCINOL FROM AQUEOUS SOLUTIONS | 2010 |
|
RU2425021C1 |
| PROCESS OF CONCENTRATING HYDROQUINONE FROM AQUEOUS SOLUTIONS | 2009 |
|
RU2407005C1 |
| METHOD FOR CONCENTRATING PHLOROGLUCINE FROM AQUEOUS SOLUTIONS | 2017 |
|
RU2680394C2 |
| METHOD OF CONCENTRATING PHENOL FROM AQUEOUS SOLUTIONS | 2002 |
|
RU2219542C1 |
| PROCESS OF CONCENTRATING RESORCINOL FROM WATER SOLUTIONS | 2007 |
|
RU2324675C1 |
| METHOD FOR CONCENTRATING HYDROQUINONE FROM AQUEOUS SOLUTION | 2004 |
|
RU2267463C1 |
| METHOD OF CONCENTRATING SALICYLIC ACID | 2010 |
|
RU2439558C1 |
| METHOD FOR CONCENTRATING 1-NAPHTHOL-5-SULFOACID FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2266898C1 |
