GB718779A - Process for manufacturing pentachlorophenol and alkali pentachlorophenates - Google Patents
Process for manufacturing pentachlorophenol and alkali pentachlorophenatesInfo
- Publication number
- GB718779A GB718779A GB168/53A GB16853A GB718779A GB 718779 A GB718779 A GB 718779A GB 168/53 A GB168/53 A GB 168/53A GB 16853 A GB16853 A GB 16853A GB 718779 A GB718779 A GB 718779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alkali
- hexachlorobenzene
- pentachlorophenol
- wetting
- wetting agent
- 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
- C07C37/01—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
- C07C37/02—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 by substitution of halogen
-
- 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
-
- 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
- C07C37/64—Preparation of O-metal compounds with O-metal group bound to a carbon atom belonging to a six-membered aromatic ring
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Pentachlorophenol is prepared (as alkali salt) by heating a mixture of hexachlorobenzene with aqueous caustic alkali and a wetting-agent to 180 DEG to 240 DEG C. in an autoclave; the wetting agent must be stable to the hot alkali. The wetting agent may be prepared in situ by adding a fatty acid or oil to the alkaline liquid. Preformed wetting agents include soaps, acylated hydroxyamines or aminosulphonic acids, and polyglycol ethers or esters. The action of the wetting agent is to cause the hexachlorobenzene to sink immediately it is added to the alkali. Preferred proportions of reactants are 2 mols. of alkali per mol. of hexachlorobenzene and 3.5 mols. of alkali per litre of solution. The process may be batch-wise or continuous. In the examples hexachlorobenzene is reacted with caustic soda in the presence of (1) sodium oleate and (2) stearoyl-methyl-taurine. Sodium pentachlorophenate is precipitated on cooling and is separated; the remaining pentachlorophenol is precipitated on acidifying the solution.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR718779X | 1952-01-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB718779A true GB718779A (en) | 1954-11-17 |
Family
ID=9090728
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB168/53A Expired GB718779A (en) | 1952-01-05 | 1953-01-02 | Process for manufacturing pentachlorophenol and alkali pentachlorophenates |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB718779A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2799714A (en) * | 1955-01-24 | 1957-07-16 | Dow Chemical Co | Method of hydrolyzing di-and trichlorobenzenes |
US2799713A (en) * | 1955-01-24 | 1957-07-16 | Dow Chemical Co | Method of making trichlorophenols from tetrachlorobenzenes |
DE1080565B (en) * | 1956-06-14 | 1960-04-28 | Witten Gmbh Chem Werke | Process for the production of pure pentachlorophenol |
US4225731A (en) * | 1977-07-26 | 1980-09-30 | Bayer Aktiengesellschaft | Process for the preparation of trifluoromethylphenols |
US4272635A (en) * | 1979-07-26 | 1981-06-09 | The Dow Chemical Company | Production of alkali metal phenates |
-
1953
- 1953-01-02 GB GB168/53A patent/GB718779A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2799714A (en) * | 1955-01-24 | 1957-07-16 | Dow Chemical Co | Method of hydrolyzing di-and trichlorobenzenes |
US2799713A (en) * | 1955-01-24 | 1957-07-16 | Dow Chemical Co | Method of making trichlorophenols from tetrachlorobenzenes |
DE1080565B (en) * | 1956-06-14 | 1960-04-28 | Witten Gmbh Chem Werke | Process for the production of pure pentachlorophenol |
US4225731A (en) * | 1977-07-26 | 1980-09-30 | Bayer Aktiengesellschaft | Process for the preparation of trifluoromethylphenols |
US4272635A (en) * | 1979-07-26 | 1981-06-09 | The Dow Chemical Company | Production of alkali metal phenates |
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