GB982532A - Improved process for preparing and for purifying octachlorodihydroxydiphenyl - Google Patents

Improved process for preparing and for purifying octachlorodihydroxydiphenyl

Info

Publication number
GB982532A
GB982532A GB615762A GB615762A GB982532A GB 982532 A GB982532 A GB 982532A GB 615762 A GB615762 A GB 615762A GB 615762 A GB615762 A GB 615762A GB 982532 A GB982532 A GB 982532A
Authority
GB
United Kingdom
Prior art keywords
octachlorodihydroxydiphenyl
alkaline
decachlorodiphenyl
acidification
precipitating
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
GB615762A
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.)
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Original Assignee
Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
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 Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU filed Critical Societe dElectro Chimie dElectro Metallurgie et des Acieries Electriques Dugine SA SECEMAU
Publication of GB982532A publication Critical patent/GB982532A/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
    • C07C37/68—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

Abstract

Octachlorodihydroxydiphenyl is made by hydrolysing powdered decachlorodiphenyl with an aqueous solution of alkaline hydroxide or alkaline earth hydroxides in the absence of organic solvents at a temperature in excess of 200 DEG C., and precipitating the octachlorodihydroxydiphenyl thus formed by acidification of the reactants. The hydrolysis is preferably carried out between 240 DEG and 250 DEG C. Powdered decachlorodiphenyl of 20 to 40 microns as described in Specification 897,149 may be used. If still finer powder is used, the addition of a wetting agent is advisable, e.g. sodium methyloleyltauride or monolaurate of polyethyleneglycol. The crude octachlorodihydroxydiphenyl may be purified by the alkaline aqueous solution of impure product with a salt of a heavy metal or alkaline earth metal, e.g. a salt of iron, copper, manganese, calcium, barium, strontium or magnesium, then separating the metal hydroxide formed and precipitating by acidification, e.g. with a mineral acid, such as sulphuric or hydrochloric, and draining, washing and drying the purified octachlorodihydroxydiphenyl.
GB615762A 1961-02-17 1962-02-16 Improved process for preparing and for purifying octachlorodihydroxydiphenyl Expired GB982532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR853033 1961-02-17

Publications (1)

Publication Number Publication Date
GB982532A true GB982532A (en) 1965-02-03

Family

ID=8749058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB615762A Expired GB982532A (en) 1961-02-17 1962-02-16 Improved process for preparing and for purifying octachlorodihydroxydiphenyl

Country Status (3)

Country Link
BE (1) BE613066A (en)
GB (1) GB982532A (en)
LU (1) LU41248A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4612404A (en) * 1982-05-24 1986-09-16 Thyagarajan Budalur S Process for treatment of fluids contaminated with polychlorinated biphenyls

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5031147B1 (en) * 1971-04-28 1975-10-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4612404A (en) * 1982-05-24 1986-09-16 Thyagarajan Budalur S Process for treatment of fluids contaminated with polychlorinated biphenyls

Also Published As

Publication number Publication date
LU41248A1 (en) 1962-04-13
BE613066A (en) 1962-05-16

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