GB730473A - Improvements relating to the extraction of phenols from coal-tar hydrocarbons - Google Patents

Improvements relating to the extraction of phenols from coal-tar hydrocarbons

Info

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
Application number
GB1565752A
Inventor
Alfred Paton Coleman Cumming
Frank Morton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midland Tar Distillers Ltd
Original Assignee
Midland Tar Distillers Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Midland Tar Distillers Ltd filed Critical Midland Tar Distillers Ltd
Priority to GB1565752A priority Critical patent/GB730473A/en
Publication of GB730473A publication Critical patent/GB730473A/en
Expired legal-status Critical Current

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.
GB1565752A 1952-06-20 1952-06-20 Improvements relating to the extraction of phenols from coal-tar hydrocarbons Expired GB730473A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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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