DE556639C - Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols - Google Patents

Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols

Info

Publication number
DE556639C
DE556639C DE1930556639D DE556639DD DE556639C DE 556639 C DE556639 C DE 556639C DE 1930556639 D DE1930556639 D DE 1930556639D DE 556639D D DE556639D D DE 556639DD DE 556639 C DE556639 C DE 556639C
Authority
DE
Germany
Prior art keywords
dephenolating
formic acid
obtaining pure
hydrocarbons containing
containing phenol
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
DE1930556639D
Other languages
German (de)
Inventor
Dr Hans Roos
Dr Emil Schwamberger
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of DE556639C publication Critical patent/DE556639C/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
    • C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/72—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar
    • C10C1/04—Working-up tar by distillation
    • C10C1/08—Winning of aromatic fractions
    • C10C1/10—Winning of aromatic fractions benzene fraction light fraction

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Entphenolierung phenolhaltiger Kohlenwasserstoffe und zur Gewinnung reiner Phenole Durch das Hauptpatent 549 400 ist ein Verfahren zur Entphenolierung phenolhaltiger Kohlenwasserstoffe beliebiger Herkunft und zur Gewinnung reiner Phenole unter Anwendung von Ameisensäure als Extraktionsmittel geschützt, wobei man aus dem bei der Extraktion erhaltenen Ameisensäurephenolgemisch die Ameisensäure durch Erhitzen abdestilliert und, zweckmäßig im Kreislauf, wieder verwendet.Process for the dephenolation of phenol-containing hydrocarbons and for the production of pure phenols By the main patent 549 400 is a process for Dephenolation of phenol-containing hydrocarbons of any origin and for extraction pure phenols protected using formic acid as extraction agent, wherein the formic acid is obtained from the formic acid phenol mixture obtained in the extraction distilled off by heating and, expediently in the circuit, reused.

Bei dieser Arbeitsweise werden bei manchen, namentlich höher siedenden Ölen und Teeren geringe Mengen von Ameisensäure im Neutralöl zurückgehalten. Versuche, durch Auswaschen mit Wasser die fehlende Ameisensäure wiederzugewinnen, hatten wegen der großen erforderlichen Wassermenge nicht den gewünschten Erfolg. Ebenso führte der Umweg über feste Formiate nicht zum Ziel.In this way of working, for some, especially those with a higher boiling point Oils and tars hold back small amounts of formic acid in the neutral oil. Try, to regain the missing formic acid by washing out with water had to do with the large amount of water required does not achieve the desired result. Likewise led the detour via solid formates does not achieve the goal.

Es wurde nun gefunden, daß man die zurückgehaltene Ameisensäure leicht wiedergewinnen kann, wenn man die niedrig siedenden, z. B. bis etwa i2o bis 130° übergehenden Anteile der von Phenol befreiten Kohlenwasserstoffe abdestilliert. Das Destillat besteht dann aus zwei Schichten, deren untere reine Ameisensäure darstellt, die sich leicht von dem darüberstehenden Neutralöl abtrennen läßt. Beispiel ioo Teile eines Braunkohlenteerm.ittelöles werden durch Extraktion mit io Teilen 77,5 °/oiger Ameisensäure von Phenol praktisch vollständig befreit. Durch Destillation lassen sich aus dem Extrakt 9 Teile Ameisensäure wiedergewinnen. Die bis 13o° siedenden Anteile des entphenolierten Ausgangsmaterials werden abdestilliert, wobei sich der fehlende eine Teil Ameisensäure aus dem Destillat abscheidet und abgetrennt wird.It has now been found that you can easily recover the retained formic acid if you use the low boiling, z. B. to about i2o to 130 ° overlying portions of the phenol-free hydrocarbons are distilled off. The distillate then consists of two layers, the lower of which is pure formic acid, which can easily be separated from the neutral oil above. EXAMPLE 100 parts of a brown coal tar oil are practically completely freed from phenol by extraction with 10 parts of 77.5% formic acid. 9 parts of formic acid can be recovered from the extract by distillation. The portions of the dephenolated starting material which boil up to 130 ° are distilled off, the missing part of formic acid separating out from the distillate and being separated off.

Claims (1)

PATENTANSPRUCH: Weiterausbildung des durch Patent 549 4oo geschützten Verfahrens zur Entphenolierung phenolhaltiger Kohlenwasserstoffe und zur Gewinnung reiner Phenole, dadurch gekennzeichnet, daß man im Neutralöl zurückgehaltene Ameisensäure zusammen mit niedrig siedenden Bestandteilen des Öls abdestilliert und aus dem Destillat gewinnt. PATENT CLAIM: Further development of the process protected by patent 549 4oo for dephenolating phenol-containing hydrocarbons and for obtaining pure phenols, characterized in that formic acid retained in the neutral oil is distilled off together with low-boiling components of the oil and recovered from the distillate.
DE1930556639D 1930-04-05 1930-04-05 Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols Expired DE556639C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE556639T 1930-04-05

Publications (1)

Publication Number Publication Date
DE556639C true DE556639C (en) 1932-08-12

Family

ID=6564834

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930556639D Expired DE556639C (en) 1930-04-05 1930-04-05 Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols

Country Status (1)

Country Link
DE (1) DE556639C (en)

Similar Documents

Publication Publication Date Title
DE556639C (en) Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols
DE433268C (en) Process for breaking down coal tar or its distillates into phenols and neutral oils
DE556640C (en) Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols
DE591121C (en) Process for obtaining pure fatty acids
DE446783C (en) Process for the sole extraction of phenol and cresols from such primordial tar oil of gas flame coal that contain phenols of all boiling limits
DE753755C (en) Process for the extraction of high-quality phenols from lignite Schwelwaessern and Schweloelen
DE928949C (en) Process for the processing of crude phenols from Schwelwaessern
DE549400C (en) Process for dephenolating phenol-containing hydrocarbons of any origin and for obtaining pure phenols
DE752645C (en) Process for the separation of phenols, organic bases and the like Like. From industrial waste water
DE704530C (en) Process for the production of phenols from oils and waste water
DE314358C (en)
DE469942C (en) Process for the production of concentrated acetic acid
DE624047C (en) Process for steam distillation of volatile substances
DE561183C (en) Process for the extraction of phenols from coal tar and lignite tar with liquefied ammonia
DE505158C (en) Process for the production of higher molecular ketones from mixtures
DE577723C (en) Process for cleaning resins
DE725035C (en) Process for the separation of non-acidic substances from phenols
DE582195C (en) Process for the direct production of condensation products from formaldehyde and coal tar oils
AT122510B (en) Process for decolorizing mineral oils and oil distillates.
DE948870C (en) Process for the purification of sulfuric acid, which is obtained as waste acid during the refining of the raw sulfur from the gas cleaning mass
AT100721B (en) Process for the preparation of concentrated acetic acid from dilute acetic acid.
DE900571C (en) Process for obtaining a sulfuric acid suitable for high concentration from the waste acids produced during the refining of petroleum, lignite tar and hard coal tar as well as other waste sulfuric acids contaminated by organic substances
DE508092C (en) Process for the preparation of concentrated acetic acid from diluted aqueous or raw, diluted wood acetic acid
DE372519C (en) Process for dewatering and distillation of brown coal tar
DE644956C (en) Process for dewatering of ethyl alcohol