DE863040C - Verfahren zur Herstellung von Acetylaceton - Google Patents

Verfahren zur Herstellung von Acetylaceton

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Publication number
DE863040C
DE863040C DED11085A DED0011085A DE863040C DE 863040 C DE863040 C DE 863040C DE D11085 A DED11085 A DE D11085A DE D0011085 A DED0011085 A DE D0011085A DE 863040 C DE863040 C DE 863040C
Authority
DE
Germany
Prior art keywords
acetone
ethyl acetate
acetylacetone
alkali metals
alkali
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
DED11085A
Other languages
English (en)
Inventor
Johann Dr Sixt
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.)
HELLMUTH HOLZ DR
Original Assignee
HELLMUTH HOLZ DR
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 HELLMUTH HOLZ DR filed Critical HELLMUTH HOLZ DR
Priority to DED11085A priority Critical patent/DE863040C/de
Application granted granted Critical
Publication of DE863040C publication Critical patent/DE863040C/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/41—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by hydrogenolysis or reduction of carboxylic groups or functional derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/65—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by splitting-off hydrogen atoms or functional groups; by hydrogenolysis of functional groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • C07C45/74—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups combined with dehydration
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/16—Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/17—Saturated compounds containing keto groups bound to acyclic carbon atoms containing hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
    • C07C49/20—Unsaturated compounds containing keto groups bound to acyclic carbon atoms
    • C07C49/203—Unsaturated compounds containing keto groups bound to acyclic carbon atoms with only carbon-to-carbon double bonds as unsaturation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  • Verfahren zur Herstellung von Acetylaceton Im Patent 824 040 ist ein Verfahren zur Herstellung von Acetylaceton aus Aceton, Essigester und Al.kalialkoholat angegeben, welches im wesentlichen darin besteht, daß zu einem Gemisch von Alikalialkoholat und Essigester bei erhöhter Temperatur, zweckmäßig bei 3o bis 5o°, allmählich Aceton, vorteilhaft gleichzeitig mit Essigester, zugesetzt wird, und sobald der Gehalt des Umsetzungsgemisches an Aceton geringe Mengen übersteigt, dieser zusammen mit Alkohol abdestilliert wird, wobei Alkohol, Essigester und Aceton übergehen, während Acetylacetonnatrium und gegebenenfalls Acetessigesternatrium zurückbleiben, worauf das Gemisch durch Ansäuern und fraktionierte Destillation in bekannter Weise zerlegt wird. Es wurde nun gefunden, daß eine Erhöhung der Ausbeute erzielt werden kann, wenn unter Beibehaltung .des Verfahrens gemäß dem Hauptpatent anstatt Alkalialkohole Alkalimetalle oder -hydride, z.. B-. Natrium bzw. Natriumhydrid, verwendet werden. Die Verwendung der Alkalimetalle wird wesentlich erleichtert, wenn sie in Form von Emulsionen in indifferenten Flüssigkeiten zur Anwendung kommen. Die Alkalimetalle bzw. -hydride werden portionsweise dem -Umsetzungsgemisch zugesetzt. Ferner kann der Essigester, wie noch festgestellt wurde, von Anfang an Aceton enthalten, so daß von einem Gemisch von Alkalimetallen bzw. -hydrilden, Essigester und Aceton ausgegangen wird. Allerdings soll vermieden werden, daß der Gehalt des Umsetzungsgemisches an Aceton bei der folgenden Zugabe des Ess;,gester-Aceton-Gemisches erheblich ansteigt; das Aceton wird dann, sobald dies der Fall ist, nach Verbrauch des Natriums bzw. Natriumhydrnds mit Alkohol abdestilliert.

Claims (3)

  1. PATENTANSPRÜCHE: i. Abänderung des. Verfahrens zur Herstellung von Acetylaceton aus Aceton, Essigester und Alkalialkoholat bei erhöhter Temperatur gemäß Patent 8124 040, dadurch gekennzeichnet, daß an Stelle von Alkalialkoholaten Alkalimetalle oder -hy,dride verwendet werden.
  2. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, dtaß die Alkalimetalle in einer inerten Flüssigkeit emulgiert verwendet- werden.
  3. 3. Verfahren nach Anspruch i und 2, dadurch gekennzeichnet, daß von einem Gemisch aus Alkalimetallen bzw. -hydriden, Essigester und Aceton ausgegangen wird.
DED11085A 1951-12-11 1951-12-11 Verfahren zur Herstellung von Acetylaceton Expired DE863040C (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED11085A DE863040C (de) 1951-12-11 1951-12-11 Verfahren zur Herstellung von Acetylaceton

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED11085A DE863040C (de) 1951-12-11 1951-12-11 Verfahren zur Herstellung von Acetylaceton

Publications (1)

Publication Number Publication Date
DE863040C true DE863040C (de) 1953-01-15

Family

ID=7033621

Family Applications (1)

Application Number Title Priority Date Filing Date
DED11085A Expired DE863040C (de) 1951-12-11 1951-12-11 Verfahren zur Herstellung von Acetylaceton

Country Status (1)

Country Link
DE (1) DE863040C (de)

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