GB730473A - Improvements relating to the extraction of phenols from coal-tar hydrocarbons - Google Patents
Improvements relating to the extraction of phenols from coal-tar hydrocarbonsInfo
- Publication number
- GB730473A GB730473A GB1565752A GB1565752A GB730473A GB 730473 A GB730473 A GB 730473A GB 1565752 A GB1565752 A GB 1565752A GB 1565752 A GB1565752 A GB 1565752A GB 730473 A GB730473 A GB 730473A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenols
- per cent
- solvent
- mixture
- hydrocarbons
- 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
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/72—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
-
- 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
- C07C37/007—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 the tar industry
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Phenols, i.e. phenol itself and other compounds having one or more hydroxyl groups attached to a single aromatic nucleus and homologues thereof having alkyl groups attached to the aromatic nucleus, are separated from hydrocarbons, e.g. aromatic, paraffin or naphthene hydrocarbons, with which they are mixed by using glycerol, ethylene glycol, diethylene glycol or tri-ethylene glycol as a preferential solvent for the phenols. The process may be applied to mixtures of phenols and hydrocarbons, substantially free from bases or to mixtures, such as the neutral oil from a coaltar fraction, which contain both phenols and bases. Mixtures in which a substantial part of the phenolic content is phenol such as for example a mixture of 70 per cent hydrocarbon and 30 per cent of phenols composed of 45 per cent phenol, 15 per cent o-cresol, 21 per cent m-cresol and 14 per cent p-cresol may suitably be extracted with glycerol, or in the case where a substantial part of the phenolic content comprises cresols, the solvent may suitably be an aqueous, e.g. 63 per cent solution of tri-ethylene glycol. A preferred process comprises treating the mixture with the solvent, e.g. by countercurrent extraction, to give an extract rich in phenols, distilling off the solvent from the extract preferably under reduced pressure and steam-distilling the extract to give a mixture of phenols and water from which the water is removed by steam distillation. Alternatively, the mixture of phenols and water from the steam distillation may be separated into an aqueous fraction containing phenols, and a phenol fraction which may contain over 20 per cent of hydrocarbon oils. The aqueous phase may be extracted with hydrocarbon oils to recover the phenols, the resulting mixture of phenols and hydrocarbons being returned to the solvent extraction stage. Similarly the phenolic phase containing hydrocarbon oils may also be returned to the extraction stage. A continuous process for separating phenols and hydrocarbon oils is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1565752A GB730473A (en) | 1952-06-20 | 1952-06-20 | Improvements relating to the extraction of phenols from coal-tar hydrocarbons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1565752A GB730473A (en) | 1952-06-20 | 1952-06-20 | Improvements relating to the extraction of phenols from coal-tar hydrocarbons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB730473A true GB730473A (en) | 1955-05-25 |
Family
ID=10063082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1565752A Expired GB730473A (en) | 1952-06-20 | 1952-06-20 | Improvements relating to the extraction of phenols from coal-tar hydrocarbons |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB730473A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1195326B (en) * | 1959-03-13 | 1965-06-24 | Dr Georg Kowalski | Process for the extraction of acidic components from tars or tea oils |
| US5354429A (en) * | 1991-12-04 | 1994-10-11 | Dakota Gasification Company | Natural cresylic acid processing |
| US5679223A (en) * | 1995-06-15 | 1997-10-21 | Dakota Gasification Company | Method for separating and purifying catechol mixtures |
| EP0901998A1 (en) * | 1997-09-15 | 1999-03-17 | Dakota Gasification Company | Neutral oil removal from natural cresylic acid mixtures |
| CN103896739A (en) * | 2014-04-23 | 2014-07-02 | 太原理工大学 | Method for extracting phenol compounds from direct coal liquefied oil through extractive distillation |
-
1952
- 1952-06-20 GB GB1565752A patent/GB730473A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1195326B (en) * | 1959-03-13 | 1965-06-24 | Dr Georg Kowalski | Process for the extraction of acidic components from tars or tea oils |
| US5354429A (en) * | 1991-12-04 | 1994-10-11 | Dakota Gasification Company | Natural cresylic acid processing |
| US5679223A (en) * | 1995-06-15 | 1997-10-21 | Dakota Gasification Company | Method for separating and purifying catechol mixtures |
| EP0901998A1 (en) * | 1997-09-15 | 1999-03-17 | Dakota Gasification Company | Neutral oil removal from natural cresylic acid mixtures |
| US5964987A (en) * | 1997-09-15 | 1999-10-12 | Dakota Gasification Company | Neutral oil removal from natural cresylic acid mixtures |
| CN103896739A (en) * | 2014-04-23 | 2014-07-02 | 太原理工大学 | Method for extracting phenol compounds from direct coal liquefied oil through extractive distillation |
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