GB707173A - An improved method for the dephenolation of aqueous salt solutions by distillation, in the course of a phenol recovery process - Google Patents

An improved method for the dephenolation of aqueous salt solutions by distillation, in the course of a phenol recovery process

Info

Publication number
GB707173A
GB707173A GB21209/51A GB2120951A GB707173A GB 707173 A GB707173 A GB 707173A GB 21209/51 A GB21209/51 A GB 21209/51A GB 2120951 A GB2120951 A GB 2120951A GB 707173 A GB707173 A GB 707173A
Authority
GB
United Kingdom
Prior art keywords
phenol
column
pipe
withdrawn
rich layer
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
GB21209/51A
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.)
Ruetgers Germany GmbH
Original Assignee
Ruetgerswerke AG
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 Ruetgerswerke AG filed Critical Ruetgerswerke AG
Publication of GB707173A publication Critical patent/GB707173A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/685Processes comprising at least two steps in series
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/72Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/74Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by distillation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/84Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by crystallisation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C39/00Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
    • C07C39/02Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
    • C07C39/04Phenol

Landscapes

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

Abstract

In the recovery of phenol from aqueous sodium phenolate, carbon dioxide is passed through the aqueous mixture and it is then allowed to separate into two liquid layers, viz. a phenol-rich layer and a water-rich layer; the two liquid layers are submitted to fractional distillation in separate columns, and the vapours obtained by the fractionation of the phenol-rich layer are utilized, by indirect heat exchange, to supply part or all of the heat required at the sump of the column wherein the water-rich layer is being <PICT:0707173/III/1> fractionated. The aqueous phenol obtained as distillate from the fractionation of the water-rich layer is preferably returned to the carbon dioxide treatment stage. Aqueous sodium phenolate is supplied through pipe 1 to column 2. The mixture flows from tray to tray down the column in countercurrent to CO2, which is introduced through pipe 3. From a central tray 5, where the sodium phenolate has already been largely converted into soda and phenol, the soda solution is withdrawn through pipe 6 and introduced into decanter 7, but the phenol, which contains unconverted phenolate, continues down the column, so that the remainder of the phenolate may be converted into phenol and soda, which are collected in decanter 7. Soda solution is withdrawn from decanter 7, and passed through pipe 11 to column 12, wherein the phenol is stripped out. The phenol-free solution is withdrawn from column 12 through pipe 13. The phenol obtained in decanter 7 is withdrawn, dehydrated with sulphuric acid, and then distilled in a separate column (not shown). The phenol vapours from this latter column are introduced by pipe 15 into boiler 14, wherein they condense thereby supplying part of the heat required for the stripping of the soda solution. The remainder of the heat required for column 12 is supplied by steamheated boiler 17. The liquid phenol withdrawn from boiler 14 is returned to the phenol distillation column as reflux. The phenol and water vapours from the head of column 12 are condensed, and the condensate is collected in container 20. Part of the condensate is returned as reflux to column 12, and the remainder is passed through pipe 9 onto tray 8 in column 2.
GB21209/51A 1950-09-28 1951-09-07 An improved method for the dephenolation of aqueous salt solutions by distillation, in the course of a phenol recovery process Expired GB707173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE707173X 1950-09-28

Publications (1)

Publication Number Publication Date
GB707173A true GB707173A (en) 1954-04-14

Family

ID=6617319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21209/51A Expired GB707173A (en) 1950-09-28 1951-09-07 An improved method for the dephenolation of aqueous salt solutions by distillation, in the course of a phenol recovery process

Country Status (1)

Country Link
GB (1) GB707173A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184665A (en) * 1985-12-23 1987-07-01 Boc Group Plc Separation of gaseous mixtures
US8758573B2 (en) 2007-12-20 2014-06-24 Borealis Technology Oy Removal of hydrocarbons from an aqueous stream

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184665A (en) * 1985-12-23 1987-07-01 Boc Group Plc Separation of gaseous mixtures
US4759786A (en) * 1985-12-23 1988-07-26 The Boc Group Plc Separation of gaseous mixtures
GB2184665B (en) * 1985-12-23 1990-05-09 Boc Group Plc Separation of gaseous mixtures
US8758573B2 (en) 2007-12-20 2014-06-24 Borealis Technology Oy Removal of hydrocarbons from an aqueous stream

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