GB582057A - Improvements in and relating to the separation of phenols - Google Patents
Improvements in and relating to the separation of phenolsInfo
- Publication number
- GB582057A GB582057A GB1162544A GB1162544A GB582057A GB 582057 A GB582057 A GB 582057A GB 1162544 A GB1162544 A GB 1162544A GB 1162544 A GB1162544 A GB 1162544A GB 582057 A GB582057 A GB 582057A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- dimethyl
- phenol
- per cent
- tertiary butyl
- 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
- C07C37/86—Purification; separation; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
2 : 4-Dimethyl, 6-tertiary butyl phenol is separated from mixtures containing it and 2 : 5-dimethyl, 4-tertiary butyl phenol by treating the mixture with an aqueous solution of an alkali metal and separating the insoluble 2 : 4-dimethyl, 6-tertiary butyl phenol from the aqueous layer. The mixture may be obtained by butylating a mixture of 2 : 4-dimethyl phenol and 2 : 5-dimethyl phenol, e.g. by isobutene in the presence of sulphuric acid or phosphoric acid; and advantageously, the butylation is effected to an extent not substantially greater than that at which the percentage by weight of the total reaction product which is insoluble in the aqueous solution of a hydroxide of an alkali metal, is at a maximum, as determined by sampling of the mixture being butylated. The 2 : 4-dimethyl, 6-tertiary butyl phenol after separation may be debutylated by known means, e.g. by heating it with a small quantity of sulphuric acid or of an aromatic sulphonic acid at a temperature of 200 DEG C. or higher. In an example, a mixture of 2 : 4-dimethyl phenol and 2 : 5-dimethyl phenol is treated with a gaseous mixture containing 12 per cent isobutene, 4 per cent n-butenes and 84 per cent butane, the mixture being obtained by the dehydrogenation of a mixture of butanes. The temperature and degree of butylation are 55 DEG C. and 65 per cent respectively. The butylated mixture is treated with 10 per cent aqueous caustic soda solution, the insoluble oily layer is separated and steam-distilled to yield 2 : 4-dimethyl, 6-butyl phenol.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1162544A GB582057A (en) | 1944-06-19 | 1944-06-19 | Improvements in and relating to the separation of phenols |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1162544A GB582057A (en) | 1944-06-19 | 1944-06-19 | Improvements in and relating to the separation of phenols |
Publications (1)
Publication Number | Publication Date |
---|---|
GB582057A true GB582057A (en) | 1946-11-04 |
Family
ID=9989713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1162544A Expired GB582057A (en) | 1944-06-19 | 1944-06-19 | Improvements in and relating to the separation of phenols |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB582057A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4113975A (en) * | 1976-01-21 | 1978-09-12 | Bayer Aktiengesellschaft | Process for purifying alkylphenolz |
US4228311A (en) * | 1979-06-08 | 1980-10-14 | Conoco, Inc. | Selective dealkylation of 4-tertiary-alkyl-2,5-xylenol |
US4247719A (en) * | 1979-07-05 | 1981-01-27 | Conoco, Inc. | Process for obtaining 2,5-xylenol from a 2,4-/2,5-xylenol mixture |
US4249026A (en) * | 1979-11-26 | 1981-02-03 | Conoco, Inc. | Separating 2,5-xylenol from a mixture of 2,5-xylenol and 2,4-xylenol |
US4292450A (en) * | 1979-11-26 | 1981-09-29 | Conoco, Inc. | Selective alkylation of 2,5-xylenol in the presence of 2,4-xylenol |
-
1944
- 1944-06-19 GB GB1162544A patent/GB582057A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4113975A (en) * | 1976-01-21 | 1978-09-12 | Bayer Aktiengesellschaft | Process for purifying alkylphenolz |
US4228311A (en) * | 1979-06-08 | 1980-10-14 | Conoco, Inc. | Selective dealkylation of 4-tertiary-alkyl-2,5-xylenol |
US4247719A (en) * | 1979-07-05 | 1981-01-27 | Conoco, Inc. | Process for obtaining 2,5-xylenol from a 2,4-/2,5-xylenol mixture |
US4249026A (en) * | 1979-11-26 | 1981-02-03 | Conoco, Inc. | Separating 2,5-xylenol from a mixture of 2,5-xylenol and 2,4-xylenol |
US4292450A (en) * | 1979-11-26 | 1981-09-29 | Conoco, Inc. | Selective alkylation of 2,5-xylenol in the presence of 2,4-xylenol |
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