FIELD: processing of wastes of production of contact anthraquinone. SUBSTANCE: wastes which contains anthraquinone, anthracene, carbazole and product of oxidation and gumming (their quantities being 50-90 %, 1-3 %, 0.1-0.5 % and 8-40 % respectively) are processed by sulfonation. Said sulfonation is carried out by heating with the help of oleum (concentration of sulfuric anhydride in it being 48-65 %). The process is followed by isolation of anthraquinone 2-sulfoacid or mixture of 2,6- and 2,7-anthraquinone disulfoacid as salt thereof. EFFECT: improves efficiency of the method. 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| 0 |
|
SU106782A1 | |
| METHOD FOR PREPARING 2,7-BIS-[2-(DIETHYLAMINO)- ETHOXY]FLUORENONE-9 DIHYDROCHLORIDE AS ANTIVIRAL AND IMMUNOMODULATION PREPARATION "AMIXINUM" | 1999 |
|
RU2218327C2 |
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|
SU1122647A1 |
| METHOD OF PRODUCING DYE ISOSULFAN BLUE (4-{[4-DIETHYLAMINO)PHENYL](2,5-DISULFOPHENYL)METHYLIDENE}-N,N-DIETHYLCYCLOHEXA-2,5-DIENE-1-IMINIUM) | 2023 |
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| METHOD OF SYNTHESIS OF 1,4- DIHYDROXY - 5,8- BIS -((2-((2-HYDROXYETHYL) - AMINO) -ETHYL) -AMINO) - ANTHRAQUINONE | 1990 |
|
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| PROCESS FOR PREPARING SALTS OF 4,8-DIAMINO-1,5-DIOXYANTHRAQUINONE-2,6- AND 4,5-DIAMINO-1,8-DIOXYNTHRAQUINONE-2,7-DISULFONIC ACIDS | 0 |
|
SU988809A1 |
| METHOD FOR PREPARING 2-NAPHTHOL-6,8-DISULFOACID AS ITS AMMONIUM-POTASSIUM SALT | 2002 |
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| CONCENTRATE FOR COSMETIC COMPOSITIONS AND A METHOD OF ITS PREPARING | 1992 |
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RU2067443C1 |
| PROCESS FOR PREPARING DISODIUM-2-MERCAPTOBENZTHIAZOLE-4,6-DISULFONATE | 0 |
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SU1109395A1 |
