FIELD: organic chemistry, analytical chemistry, chemical technology.
SUBSTANCE: method for extraction of aminonaphtholsulfoacids and aminophenolsulfoacids involves extraction with organic solvent wherein sodium dodecyl sulfate an aqueous solution is added to aqueous solution up to its concentration 1.5 x 10-4 mol/dm3, hydrochloric acid is added up to the concentration 1.5-1.6 mol/dm3. As extractant method involves using 1,4-dioxane in the volume ratio of extractant to sample = 1:10 and extraction is carried out from saturated solution of ammonium sulfate. Invention provides enhancing degree of extraction of aminonaphtholmonosulfoacids and aminophenolmonosulfoacids from aqueous solutions wherein extraction degree of sulfoacids is 96.1-99.6% after a single extraction. Invention can be recommended for concentrating 1-amino-2-naphthol-4-sulfoacid and 2-aminophenol-4-sulfoacid from treated sewage waters in manufacturing azodyes.
EFFECT: improved method for extraction.
1 tbl, 11 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR RECOVERY OF 1-AMINO-2-NAPHTHOL-4-SULFONIC ACID FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2252934C1 |
| METHOD OF EXTRACTION ISOLATION AND CONCENTRATION OF NAPHTHOLMONOSULFONIC ACIDS FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2255083C1 |
| METHOD FOR CONCENTRATING 1-NAPHTHOL-5-SULFOACID FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2266898C1 |
| METHOD FOR EXTRACTION OF AMINONAPHTHOL DISULFOACIDS FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2266899C1 |
| AROMATIC HYDROXYSULFONIC ACID IDENTIFICATION METHOD | 2004 |
|
RU2258925C1 |
| METHOD FOR SORPTION EXTRACTION OF HYDROXYSULFOACIDS FROM AQUEOUS SOLUTIONS | 2004 |
|
RU2258697C1 |
| METHOD FOR EXTRACTION OF 1-NAPHTHOL-4-SULFOACID FROM AQUEOUS SOLUTION | 0 |
|
SU1837250A1 |
| METHOD OF EXTRACTING AZATHIOPRINE FROM BIOLOGICAL FLUIDS | 2012 |
|
RU2495425C1 |
| METHOD OF DETERMINATION OF 1-NAPHTHOL IN PRESENCE OF 2-NAPHTHOL | 0 |
|
SU1833806A1 |
| METHOD FOR EXTRACTION CONCENTRATING NAPHTHOLMONOSULFOACIDS FROM AQUEOUS SOLUTIONS | 2003 |
|
RU2240311C1 |
