GB711656A - Improvements in or relating to the recovery of phenols - Google Patents

Improvements in or relating to the recovery of phenols

Info

Publication number
GB711656A
GB711656A GB10079/52A GB1007952A GB711656A GB 711656 A GB711656 A GB 711656A GB 10079/52 A GB10079/52 A GB 10079/52A GB 1007952 A GB1007952 A GB 1007952A GB 711656 A GB711656 A GB 711656A
Authority
GB
United Kingdom
Prior art keywords
phenols
aqueous phase
solvent
phase
contacted
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
GB10079/52A
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.)
Bataafsche Petroleum Maatschappij NV
Original Assignee
Bataafsche Petroleum Maatschappij NV
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 Bataafsche Petroleum Maatschappij NV filed Critical Bataafsche Petroleum Maatschappij NV
Publication of GB711656A publication Critical patent/GB711656A/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
    • C07C37/01—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis
    • C07C37/055—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by replacing functional groups bound to a six-membered aromatic ring by hydroxy groups, e.g. by hydrolysis the substituted group being bound to oxygen, e.g. ether group

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Phenols are recovered from their solutions in caustic alkalis by neutralizing to form a phenolic phase and an aqueous phase of pH 8-11, contacting the aqueous phase in the presence of at least part of the liberated phenols with a solvent for the phenols which is not completely miscible with the aqueous phase and is more volatile than the phenols, separating the solvent from the aqueous phase and recovering phenols from the solvent. The process is applicable to phenol itself, alkyl phenols and mixtures of such products. In preferred conditions the phenolate solution is brought to pH 8.5-9.5 (e.g. 9) with carbon dioxide and the aqueous phase contacted with the solvent in the presence of 25-100 per cent of the liberated phenols. The separated phenolic phase may then be contacted with the solvent in the presence of a further aqueous phase which may contain a salt in solution, the two phases separated and at least a part of the phenols returned to the initial aqueous phase of pH 8-11 before contacting this with the solvent. When a mixture of phenols is so obtained this may be fractionally distilled and the higher molecular weight fraction returned to the initial aqueous phase. The salts dissolved in the aqueous phase (preferably alkali carbonate or sulphate) are preferably present to the extent of 3-10 per cent by weight. An example is given of the process using diisopropyl ether as extracting solvent, the starting material being a catalytically cracked petroleum distillate. The solvent is preferably a slightly polar oxygen-containing substance having a B.Pt. 60-150 DEG C. (various ethers, alcohols, and ketones are specified) or else an aromatic mono-nuclear hydrocarbon or a halogenated aliphatic hydrocarbon. Suitable apparatus is shown.
GB10079/52A 1951-04-24 1952-04-22 Improvements in or relating to the recovery of phenols Expired GB711656A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US711656XA 1951-04-24 1951-04-24

Publications (1)

Publication Number Publication Date
GB711656A true GB711656A (en) 1954-07-07

Family

ID=22099680

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10079/52A Expired GB711656A (en) 1951-04-24 1952-04-22 Improvements in or relating to the recovery of phenols

Country Status (1)

Country Link
GB (1) GB711656A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005005359A1 (en) * 2003-06-20 2005-01-20 Sunoco, Inc. (R & M) Method for recovery of phenol from aqueous streams
CN109825322A (en) * 2019-01-21 2019-05-31 湘潭大学 A method of extracting phenolic substances from coal tar or coal direct liquefaction oil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005005359A1 (en) * 2003-06-20 2005-01-20 Sunoco, Inc. (R & M) Method for recovery of phenol from aqueous streams
CN109825322A (en) * 2019-01-21 2019-05-31 湘潭大学 A method of extracting phenolic substances from coal tar or coal direct liquefaction oil
CN109825322B (en) * 2019-01-21 2021-07-23 湘潭大学 Method for extracting phenolic substances from coal tar or direct coal liquefaction oil

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