GB716886A - Improvements in or relating to the separation of phenols from waste water - Google Patents
Improvements in or relating to the separation of phenols from waste waterInfo
- Publication number
- GB716886A GB716886A GB24651/51A GB2465151A GB716886A GB 716886 A GB716886 A GB 716886A GB 24651/51 A GB24651/51 A GB 24651/51A GB 2465151 A GB2465151 A GB 2465151A GB 716886 A GB716886 A GB 716886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- phenol
- substances
- advantageously
- stages
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/005—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from products, waste products or side-products of processes, not directed to the production of phenols, by conversion or working-up
- C07C37/009—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from products, waste products or side-products of processes, not directed to the production of phenols, by conversion or working-up from waste water
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Phenols are separated from phenol-containing waters or aqueous solutions, especially waste waters from fuel distillation, hydrogenation, synthetic phenol and the like plants in at least four (advantageously six to twelve) stages in counter-current utilizing non-saponifiable solvents such as hydrocarbons, ethers, ketones, nitrogen bases or mixtures of two or more of these substances or two or more of these substances or mixtures of substances in succession in at least 5 per cent by volume, referred to the liquid to be treated and advantageously 10 to 20 per cent, the charged solvent being regenerated practically free from phenol by treatment with alkalis, their aqueous solutions or excess alkalis or preferably by distillation of the charged solvent and treatment of the distillate with said alkalis and reused. The waters which have been extracted down to a phenol content of about 100 milligrams or less per litre are extracted in one or more further extraction stages with the same or another solvent advantageously non-saponifiable, using larger quantities of solvent than in the first stages, the regeneration of the solvent or solvents being effected with alkalis. The small quantities of phenolate liquors obtained after separation from the bulk of the phenols taken up, may be added after acidification by mineral acds, e.g. carbon dioxide, to the waste water to be treated.ALSO:Phenols are separated from phenol-containing waters or aqueous solutions, especially waste waters from fuel distillation, hydrogenation, synthetic phenol and the like plants in at least four (advantageously six to twelve) stages in countercurrent utilizing non-vaporizable solvents such as hydrocarbons, ethers, ketones, nitrogen bases or mixtures of two or more of these substances or two or more of these substances or mixtures of substances in succession in at least 5 per cent by volume, referred to the liquid to be treated, and advantageously 10 per cent to 20 per cent, the charged solvent being regenerated practically free from phenol by treatment with alkalia, their aqueous solutions or excess alkalic or preferably by distillation of the charged solvent and treatment of the distillate with said alkalia and reused. The waters which have been extracted down to a phenol content of about 100 milligrams or less per litre are extracted in one or more further extraction stages with the same or another solvent advantageously non-vaporizable, using larger quantities of solvent than in the first stages, the regeneration of the solvent or solvents being effected with alkalis. The small quantities of phenolate liquors obtained after separation from the bulk of the phenols taken up, may be added after acidification by mineral acids, e.g. carbon dioxide, to the waste water to be treated.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE716886X | 1948-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB716886A true GB716886A (en) | 1954-10-13 |
Family
ID=6626547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24651/51A Expired GB716886A (en) | 1948-10-01 | 1951-10-22 | Improvements in or relating to the separation of phenols from waste water |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB716886A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2807654A (en) * | 1955-09-13 | 1957-09-24 | Shell Dev | Process for extraction of phenol from aqueous mixtures |
FR2529196A1 (en) * | 1982-06-28 | 1983-12-30 | Lummus Co | PURIFICATION OF PHENOL |
WO2002002464A2 (en) * | 2000-07-03 | 2002-01-10 | Syngenta Limited | Chemical extraction process |
CN116459554A (en) * | 2023-04-26 | 2023-07-21 | 邢台旭阳煤化工有限公司 | Method for recycling light components in phenol residues |
-
1951
- 1951-10-22 GB GB24651/51A patent/GB716886A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2807654A (en) * | 1955-09-13 | 1957-09-24 | Shell Dev | Process for extraction of phenol from aqueous mixtures |
FR2529196A1 (en) * | 1982-06-28 | 1983-12-30 | Lummus Co | PURIFICATION OF PHENOL |
WO2002002464A2 (en) * | 2000-07-03 | 2002-01-10 | Syngenta Limited | Chemical extraction process |
WO2002002464A3 (en) * | 2000-07-03 | 2002-06-06 | Syngenta Ltd | Chemical extraction process |
US7371324B2 (en) | 2000-07-03 | 2008-05-13 | Syngenta Limited | Chemical process |
CN116459554A (en) * | 2023-04-26 | 2023-07-21 | 邢台旭阳煤化工有限公司 | Method for recycling light components in phenol residues |
CN116459554B (en) * | 2023-04-26 | 2024-01-09 | 邢台旭阳煤化工有限公司 | Method for recycling light components in phenol residues |
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