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 processInfo
- 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- withdrawn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
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
- C07C37/685—Processes comprising at least two steps in series
-
- 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
- C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
- C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
- C07C37/74—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- 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
- C07C37/84—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by crystallisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
- C07C39/02—Compounds 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
- C07C39/04—Phenol
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.
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)
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 |
-
1951
- 1951-09-07 GB GB21209/51A patent/GB707173A/en not_active Expired
Cited By (4)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3230156A (en) | Purification of synthetic methanol by plural stage distillation | |
GB943817A (en) | Improvements relating to processes for obtaining pure methanol from crude synthetic methanol | |
GB707173A (en) | An improved method for the dephenolation of aqueous salt solutions by distillation, in the course of a phenol recovery process | |
DE2061335C3 (en) | Process for the production of pure maleic anhydride | |
GB660773A (en) | Improvements in or relating to the separation and purification of methanol | |
US2801265A (en) | Dehydration of volatile fatty acids through solvents | |
US2173692A (en) | Dehydration of ethanol | |
GB791220A (en) | Purifying synthetic ethanol by distillation | |
GB702823A (en) | Improvements in or relating to continuous fractional distillation | |
US2527660A (en) | Methacrylonitrile purification | |
US3014971A (en) | Method of improving the permanganate time of ethyl alcohol | |
US2096734A (en) | Process for concentrating and purifying acetic acid from pyroligneous products | |
GB446137A (en) | Improvements in fractional distillation | |
GB590767A (en) | Method of separating the components of azeotropic mixtures | |
GB823339A (en) | Improvements in or relating to the distillation of ethanol | |
GB310623A (en) | Improvements in the manufacture of higher alcohols | |
GB698617A (en) | Improved method of separating by distillation the components of aqueous mixtures containing methanol and ethanol | |
GB736984A (en) | Improvements in or relating to the dehydration of liquids by azeotropic distillation | |
GB598346A (en) | Improved process and apparatus for the rectification of impure alcoholic liquids | |
GB877622A (en) | Isopropanol purification process | |
US1709309A (en) | Process for the separation of low-temperature tar into phenols and hydrocarbons | |
GB735867A (en) | Improvements in or relating to the concentration of fatty acids in aqueous solution and to the recovery of said acids from aqueous solutions thereof by azeotropic distillation | |
GB670229A (en) | Improvements in or relating to purification of ethanol by distillation | |
GB577241A (en) | An improved process for the purification of organic liquids by fractional distillation | |
GB803047A (en) | A process for rectifying ethanol by distillation under elevated pressure |