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GB1329483A - Preparation of hydroquinone - Google Patents

Preparation of hydroquinone

Info

Publication number
GB1329483A
GB1329483A GB2659271*A GB2659271A GB1329483A GB 1329483 A GB1329483 A GB 1329483A GB 2659271 A GB2659271 A GB 2659271A GB 1329483 A GB1329483 A GB 1329483A
Authority
GB
United Kingdom
Prior art keywords
hydroquinone
electrolysed
until
volts
april
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
GB2659271*A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB1329483A publication Critical patent/GB1329483A/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
    • C07C37/06—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by conversion of non-aromatic six-membered rings or of such rings formed in situ into aromatic six-membered rings, e.g. by dehydrogenation
    • C07C37/07—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by conversion of non-aromatic six-membered rings or of such rings formed in situ into aromatic six-membered rings, e.g. by dehydrogenation with simultaneous reduction of C=O group in that ring
    • 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
    • C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/74—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C39/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring
    • C07C39/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a six-membered aromatic ring monocyclic with no unsaturation outside the aromatic ring
    • C07C39/08—Dihydroxy benzenes; Alkylated derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B3/00—Electrolytic production of organic compounds
    • C25B3/20—Processes
    • C25B3/23—Oxidation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

1329483 Hydroquinone UNION CARBIDE CORP 19 April 1971 [9 April 1970] 26592/71 Heading C2C The invention comprises a method of preparing hydroquinone from phenol by (a) electrolysing an aqueous solution containing 0À5-4% by weight phenol and 1-5% sulphuric acid at 25-100‹ C., a pH of less than 4, an anode D.C. potential of at least +0À9 volts with reference to a saturated calomel electrode, a cathode D.C. potential more negative than +0À4 volts with reference to a saturated calomel electrode, and a current density of at least 4 amperes per square decimetre until up to 50% by weight phenol has been electrolysed to hydroquinone and (b) treating the electrolysed solution with sufficient reducing agent to convert p-benzoquinone to hydroquinone, (c) removing tars and colour bodies, (d) vacuum distilling at a pot temperature of 45-65‹ C. and a pressure of 70 to about 200 ml of mercury until the volume of electrolysed aqueous solution is “ to 1/10 of the original volume, (e) allowing the distilled pot residue to cool until hydroquinone crystallizes out of solution and (f) recovering the crystallized hydroquinone.
GB2659271*A 1970-04-09 1971-04-19 Preparation of hydroquinone Expired GB1329483A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2692470A 1970-04-09 1970-04-09

Publications (1)

Publication Number Publication Date
GB1329483A true GB1329483A (en) 1973-09-12

Family

ID=21834581

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2659271*A Expired GB1329483A (en) 1970-04-09 1971-04-19 Preparation of hydroquinone

Country Status (7)

Country Link
US (1) US3663381A (en)
JP (1) JPS5136255B1 (en)
BE (1) BE765476A (en)
CA (1) CA926809A (en)
DE (1) DE2117750C3 (en)
FR (1) FR2089395A5 (en)
GB (1) GB1329483A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035253A (en) * 1976-06-01 1977-07-12 Eastman Kodak Company Electrolytic oxidation of phenol at lead-thallium anodes
US4689124A (en) * 1985-09-13 1987-08-25 The Dow Chemical Company Flow-through electrolytic cell
US4624759A (en) * 1986-01-06 1986-11-25 The Dow Chemical Company Electrolytic method for producing quinone methides
US4624758A (en) * 1986-01-06 1986-11-25 The Dow Chemical Company Electrocatalytic method for producing dihydroxybenzophenones

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2130151A (en) * 1933-12-16 1938-09-13 Palfreeman Herbert Production of quinone and hydroquinone
US2135368A (en) * 1934-10-10 1938-11-01 Vagenius Nels Harold Method of preparing quinone
US3509031A (en) * 1968-08-28 1970-04-28 Union Carbide Corp Electrochemical oxidation of phenol
US3708744A (en) * 1971-08-18 1973-01-02 Westinghouse Electric Corp Regulating and filtering transformer

Also Published As

Publication number Publication date
US3663381A (en) 1972-05-16
CA926809A (en) 1973-05-22
BE765476A (en) 1971-10-08
DE2117750C3 (en) 1975-09-25
DE2117750B2 (en) 1975-02-13
JPS5136255B1 (en) 1976-10-07
DE2117750A1 (en) 1971-10-28
FR2089395A5 (en) 1972-01-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee