FR2193805A1 - Distillative prodn of pure hydroquinone - avoiding crystallisation of prod on cool surfaces which clogs equipment - Google Patents

Distillative prodn of pure hydroquinone - avoiding crystallisation of prod on cool surfaces which clogs equipment

Info

Publication number
FR2193805A1
FR2193805A1 FR7327089A FR7327089A FR2193805A1 FR 2193805 A1 FR2193805 A1 FR 2193805A1 FR 7327089 A FR7327089 A FR 7327089A FR 7327089 A FR7327089 A FR 7327089A FR 2193805 A1 FR2193805 A1 FR 2193805A1
Authority
FR
France
Prior art keywords
hydroquinone
distillative
prodn
prod
cool surfaces
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.)
Granted
Application number
FR7327089A
Other languages
English (en)
French (fr)
Other versions
FR2193805B1 (enExample
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 Rheinische Braunkohlen Kraftstoff AG
Original Assignee
Union Rheinische Braunkohlen Kraftstoff AG
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 Rheinische Braunkohlen Kraftstoff AG filed Critical Union Rheinische Braunkohlen Kraftstoff AG
Publication of FR2193805A1 publication Critical patent/FR2193805A1/fr
Application granted granted Critical
Publication of FR2193805B1 publication Critical patent/FR2193805B1/fr
Granted 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
    • C07C37/68—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
    • C07C37/80—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by distillation by extractive distillation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
FR7327089A 1972-07-24 1973-07-24 Distillative prodn of pure hydroquinone - avoiding crystallisation of prod on cool surfaces which clogs equipment Granted FR2193805A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722236304 DE2236304A1 (de) 1972-07-24 1972-07-24 Verfahren zur gewinnung von reinem hydrochinon

Publications (2)

Publication Number Publication Date
FR2193805A1 true FR2193805A1 (en) 1974-02-22
FR2193805B1 FR2193805B1 (enExample) 1977-05-13

Family

ID=5851537

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7327089A Granted FR2193805A1 (en) 1972-07-24 1973-07-24 Distillative prodn of pure hydroquinone - avoiding crystallisation of prod on cool surfaces which clogs equipment

Country Status (2)

Country Link
DE (1) DE2236304A1 (enExample)
FR (1) FR2193805A1 (enExample)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1912628A (en) * 1931-09-04 1933-06-06 Dow Chemical Co Purification of dihydric phenols

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1912628A (en) * 1931-09-04 1933-06-06 Dow Chemical Co Purification of dihydric phenols

Also Published As

Publication number Publication date
DE2236304A1 (de) 1974-02-14
FR2193805B1 (enExample) 1977-05-13

Similar Documents

Publication Publication Date Title
CA960174A (en) Cooling tube ferrule
ES417738A1 (es) Un procedimiento para la preparacion de esteres de 17 alfa-carboxilato o esteres neutros de carbonato o fosfato de 17 alfa 21-diluidroxi-20-oxo-esteroides.
IT1014476B (it) Procedimento di refrigerazione e macchina criogenica per l attuazio ne del procedimento
JPS5425423A (en) Frequency converter
AU462644B2 (en) Cooling water pump, preferably of motorcar engines
FR2193805A1 (en) Distillative prodn of pure hydroquinone - avoiding crystallisation of prod on cool surfaces which clogs equipment
IT1021682B (it) Procedimento per produrre disper sioni di esteri polivinilici
SE7408642L (enExample)
IT973337B (it) Procedimento per la coltivazione aerobica di microorganismi
JPS5226172A (en) Coolers for semi-conductor element
GB1327176A (en) Tennis practice apparatus
ZA71836B (en) Method for the continuous vacuum decarbonization of low carbon ferrochrome
JPS52132675A (en) Vapor-phase growth method of thin film
JPS5214252A (en) Defrosting device
AU499058B2 (en) Propeller & cooling pump drive
JPS51147216A (en) High luminance driving system of plasma panel display
JPS51120454A (en) Refrigerating cycle
JPS52127646A (en) High-frequency heating equipment
FR2100928A1 (en) 3-(morpholino-alkoxy)-benzpyrazole derivs - useful as analgesics
NL7102664A (en) Substd 1,2-methylene-17-alpha-hydroxy-9-beta, 10-alpha- - steroids - gestagens and ovulation inhibitors
JPS5221286A (en) Liquid crystal composite
CA949341A (en) Cooling chamber for water cooler
JPS52128092A (en) Thin film el panel
JPS5226007A (en) Refrigerator
FR1266773A (fr) Procédé pour la production d'oxyde de fer-iii gamma, sous forme d'aiguilles, convenant notamment pour supports de magnétogrammes

Legal Events

Date Code Title Description
ST Notification of lapse