GB718779A - Process for manufacturing pentachlorophenol and alkali pentachlorophenates - Google Patents

Process for manufacturing pentachlorophenol and alkali pentachlorophenates

Info

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
Application number
GB168/53A
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.)
Pechiney SA
Original Assignee
Pechiney SA
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 Pechiney SA filed Critical Pechiney SA
Publication of GB718779A publication Critical patent/GB718779A/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
    • C07C37/01—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.
GB168/53A 1952-01-05 1953-01-02 Process for manufacturing pentachlorophenol and alkali pentachlorophenates Expired GB718779A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799713A (en) * 1955-01-24 1957-07-16 Dow Chemical Co Method of making trichlorophenols from tetrachlorobenzenes
US2799714A (en) * 1955-01-24 1957-07-16 Dow Chemical Co Method of hydrolyzing di-and trichlorobenzenes
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799713A (en) * 1955-01-24 1957-07-16 Dow Chemical Co Method of making trichlorophenols from tetrachlorobenzenes
US2799714A (en) * 1955-01-24 1957-07-16 Dow Chemical Co Method of hydrolyzing di-and trichlorobenzenes
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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