FR2102898A5 - Pyrocatechol manufacture from a chloro - phenol - Google Patents

Pyrocatechol manufacture from a chloro - phenol

Info

Publication number
FR2102898A5
FR2102898A5 FR7031444A FR7031444A FR2102898A5 FR 2102898 A5 FR2102898 A5 FR 2102898A5 FR 7031444 A FR7031444 A FR 7031444A FR 7031444 A FR7031444 A FR 7031444A FR 2102898 A5 FR2102898 A5 FR 2102898A5
Authority
FR
France
Prior art keywords
pyrocatechol
weight
chloro
phenol
manufacture
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
FR7031444A
Other languages
French (fr)
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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
Priority to BE755540D priority Critical patent/BE755540A/en
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to FR7031444A priority patent/FR2102898A5/en
Application granted granted Critical
Publication of FR2102898A5 publication Critical patent/FR2102898A5/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Pyrocatechol is prepared by treating o-chlorophenol with 4-8 mole equivalents of alkali-metal hydroxide in aqueous solution at 60-85% Concentration by weight, in the presence of a copper hydrolysis catalyst (0.5% by weight of Cu relative to the weight of o-chlorophenol) at 160-240 degrees C. Preferably the alkali concentration is maintained at the above level throughout the reaction. This method minimizes the production of resorcinol and polynuclear products, and gives good yields in reasonable reaction times.
FR7031444A 1967-04-06 1970-08-28 Pyrocatechol manufacture from a chloro - phenol Expired FR2102898A5 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE755540D BE755540A (en) 1967-04-06 Pyrocatechol manufacture from a chloro - phenol
FR7031444A FR2102898A5 (en) 1970-08-28 1970-08-28 Pyrocatechol manufacture from a chloro - phenol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7031444A FR2102898A5 (en) 1970-08-28 1970-08-28 Pyrocatechol manufacture from a chloro - phenol

Publications (1)

Publication Number Publication Date
FR2102898A5 true FR2102898A5 (en) 1972-04-07

Family

ID=9060665

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7031444A Expired FR2102898A5 (en) 1967-04-06 1970-08-28 Pyrocatechol manufacture from a chloro - phenol

Country Status (1)

Country Link
FR (1) FR2102898A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022200701A1 (en) 2021-03-23 2022-09-29 Psa Automobiles Sa Reversible air conditioning device for a motor vehicle and method for installing such a device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022200701A1 (en) 2021-03-23 2022-09-29 Psa Automobiles Sa Reversible air conditioning device for a motor vehicle and method for installing such a device

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Legal Events

Date Code Title Description
ST Notification of lapse