GB1304658A - - Google Patents

Info

Publication number
GB1304658A
GB1304658A GB2940971A GB2940971A GB1304658A GB 1304658 A GB1304658 A GB 1304658A GB 2940971 A GB2940971 A GB 2940971A GB 2940971 A GB2940971 A GB 2940971A GB 1304658 A GB1304658 A GB 1304658A
Authority
GB
United Kingdom
Prior art keywords
pyrocatechol
mixture
alkyl
june
temperature
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
GB2940971A
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 claimed from DE19702031712 external-priority patent/DE2031712A1/en
Priority claimed from DE19702039077 external-priority patent/DE2039077A1/en
Application filed filed Critical
Publication of GB1304658A publication Critical patent/GB1304658A/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
    • C07C37/62—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by introduction of halogen; by substitution of halogen atoms by other halogen atoms
    • 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)

Abstract

1304658 Production of pyrocatechol and alkyl pyrocatechols UNION RHEINISCHE BRAUNKOHLEN KRAFTSTOFF AG 23 June 1971 [26 June 1970 6 Aug 1970] 29409/71 Heading C2C Pyrocatechol and alkyl pyrocatechol are prepared by chlorinating a sodium phenolate solution having a molar ratio of phenolic compounds to sodium hydroxide of from 1 : 1 to 1 : 2, with sodium hypochlorite at a temperature of from 5 to 60‹ C., hydrolysing the chlorophenols obtained without isolating them from the chlorination mixture by heating the chlorination mixture at a temperature of from 160‹ to 250‹ C., in the presence of from 0À05 to 0À3 g/litre of copper or a corresponding amount of a copper salt as catalyst, acidifying the hydrolysis mixture with sulphuric or hydrochloric acid, extracting the phenolic compounds obtained from the acidified mixture with an organic extractant and recovering pyrocatechol or alkyl pyrocatechol by distillation.
GB2940971A 1970-06-26 1971-06-23 Expired GB1304658A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702031712 DE2031712A1 (en) 1970-06-26 1970-06-26 (alkyl) pyrocatechin prodn from (alkyl) phenols by - chlorination and saponification
DE19702039077 DE2039077A1 (en) 1970-08-06 1970-08-06 Pyrocatechol and alkylpyrocatechols prepn - by chlorinating alkaline phenolate sol with sodium hypochlorite, saponification

Publications (1)

Publication Number Publication Date
GB1304658A true GB1304658A (en) 1973-01-24

Family

ID=25759343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2940971A Expired GB1304658A (en) 1970-06-26 1971-06-23

Country Status (3)

Country Link
FR (1) FR2099956A5 (en)
GB (1) GB1304658A (en)
NL (1) NL7108666A (en)

Also Published As

Publication number Publication date
FR2099956A5 (en) 1972-03-17
NL7108666A (en) 1971-12-28

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees