DE483823C - Process for the production of Phoron and Halbphoron (2íñ6-Dimethylhepten 2-ol 6-one 4) - Google Patents
Process for the production of Phoron and Halbphoron (2íñ6-Dimethylhepten 2-ol 6-one 4)Info
- Publication number
- DE483823C DE483823C DEI27235D DEI0027235D DE483823C DE 483823 C DE483823 C DE 483823C DE I27235 D DEI27235 D DE I27235D DE I0027235 D DEI0027235 D DE I0027235D DE 483823 C DE483823 C DE 483823C
- Authority
- DE
- Germany
- Prior art keywords
- phoron
- heating
- dimethylhepten
- water
- halbphoron
- 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
Links
Classifications
-
- 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
- C07C45/66—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 by dehydration
Landscapes
- 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 Phoron und Halbphoron (2 # 6-Dimethylhepten 2-o1 6-on 4). Es wurde gefunden, daB der in der Patentschrift 481 29o beschriebene symmetrische Triacetondialkohol durch Erhitzen mit Mineral-Säuren, wasserfreier Oxalsäure, Chlorzink, Essigsäureanhydrid oder ähnlich wasserentziehend wirkenden Mitteln unter Abgabe von 2 Mol. Wasser in Phoron übergeht.Process for the preparation of Phoron and Halbphoron (2 # 6-Dimethylhepten 2-o1 6-on 4). It has been found that the one described in patent specification 481,290 symmetrical triacetone dialcohol by heating with mineral acids, anhydrous Oxalic acid, zinc chloride, acetic anhydride or similar dehydrating effects Means with the release of 2 mol. Water in Phoron passes.
Gegenüber den bisher bekannten Methoden der Phorongewinnung, die in der Kondensation von Aceton mittels Chlorwasserstoffes (Bayer, Annalen 140,140, 297) 297) oder mit Acetylchlorid in Gegenwart von Chlorzink (D e s c u d e, Annales de Chimie 7/29, 493) bestehen und bei welchen als lästiges Nebenprodukt in der Hauptsache Mesityloxyd erhalten wird, hat dieses Verfahren den Vorteil, daB reines Phoron in sehr guter Ausbeute gewonnen werden kann.Compared to the previously known methods of phorone extraction, which are described in the condensation of acetone by means of hydrogen chloride (Bayer, Annalen 140,140, 297) 297) or with acetyl chloride in the presence of zinc chloride (D e s c u d e, Annales de Chimie 7/29, 493) exist and in which as an annoying by-product mainly Mesityl oxide is obtained, this process has the advantage that pure phosphorus is very good yield can be obtained.
Ferner wurde gefunden, daB die Wasserabspaltung aus symmetrischem
Triacetondialkohol unter geeigneten Bedingungen partiell verläuft, indem nur x Mol.
Wasser austritt, wobei ein ungesättigter Ketonalkohol, das bisher unbekannte 2 #
6-Dimethylhepten 2-o1 6-on 4, entsteht, welches als Halbphoron bezeichnet werden
soll.
Beispiele i. i kgTriacetondialkohol wird geschmolzen, tropfenweise mit 50 g Schwefelsäure von 66' B6 versetzt und i Stunde auf 7o bis -75' erhitzt, wobei starke Trübung und Wasserausscheidung eintritt. Nach .Erkalten wird das Produkt von der wässerigen Schwefelsäure (etwa 1509) getrennt, mit Sodalösung neutral gewaschen und einer fraktionierten Vakuumdestillation unterworfen. Nach Abtrennen eines wasserhaltigen Vorlaufs destilliert die Hauptfraktion unter 22 mm Hg bei 105 bis ifo ° über. Durch nochmaliges Destillieren kann Halbphoron rein erhalten werden. Die Ausbeute ist nahezu quantitativ.Examples i. 1 kg of triacetone dialcohol is melted, 50 g of sulfuric acid of 66 ' B6 are added dropwise and the mixture is heated to 70 to -75' for 1 hour, with strong turbidity and excretion of water. After cooling, the product is separated from the aqueous sulfuric acid (approx. 1509), washed neutral with soda solution and subjected to fractional vacuum distillation. After a water-containing first run has been separated off, the main fraction distills over below 22 mm Hg at 105 to ifo °. By distilling again, half-phonon can be obtained in pure form. The yield is almost quantitative.
2. 1 kg Halbphoron wird mit 2o g konzentrierter Schwefelsäure versetzt. Die klare Lösung zeigt beim Erhitzen auf 8o' starke Trübung infolge Wasserabscheidung und wird so lange auf 75 bis 8o' gehalten, bis die ausgeschiedene Wassermenge nicht mehr zunimmt. Nach Erkalten wird von der wässerigen Säure abgetrennt, mit Sodalösung neutral gewaschen und das Produkt nach dem Trocknen mit Chlorcalcium destilliert. Bei igo bis 195' geht die Hauptmenge des gebildeten Phorons über, das in Eiswasser zu einer hellgelben Kristallmasse erstarrt. Die Ausbeute an Phoron ist etwa 9o %.2. 2o g of concentrated sulfuric acid are added to 1 kg of hemophoron. When heated to 80 ', the clear solution shows strong turbidity as a result of water separation and is kept at 75 to 8o 'until the amount of water excreted is not enough more increases. After cooling, the aqueous acid is separated off with soda solution washed neutral and, after drying, the product is distilled with calcium chloride. In igo up to 195 ', most of the phoron formed passes over into ice water solidified to a light yellow crystal mass. The Phoron yield is about 90%.
g. i kg Triacetondialkohol wird in einem Fraktionierkolben erhitzt. Bei 165 bis igo ° destillieren 950 g einer hellgelben Flüssigkeit ab, die bei einer. fraktionierten Destillation unter vermindertem Druck neben fo °/o Wasser, fo °/o Aceton und 16 °/o Mesityloxyd 55 °/o reines Halbphoroil liefert.G. 1 kg of triacetone dialcohol is heated in a fractionating flask. At 165 to igo °, 950 g of a light yellow liquid distill off, which at a. Fractional distillation under reduced pressure in addition to fo% water, fo% acetone and 16% mesityl oxide yields 55% pure hemi-phoroil.
Bei langsamem Destillieren von Triacetondialkohol unter normalem Druck entsteht im wesentlichen Wasser und Halbphoron, das teilweise weiterzerfällt in Aceton und Mesityloxyd.When distilling triacetone dialcohol slowly under normal pressure essentially water and hemophoron are produced, some of which continue to break down into Acetone and mesityl oxide.
4. 1,74 kg Triacetondialkohol und 2,1 kg Essigsäureanhydrid werden i2 Stunden am RückfluB gekocht. Nach Erkalten wird in Wasser gegossen, von der verdünnten Essigsäure getrennt, das Produkt mit Sodalösung neutral gewaschen, mit Chlorcalcium getrocknet und destilliert. Das Ganze geht bei i8o bis 195' als hellgelbe Flüssigkeit über, aus welcher durch nochmalige Destillation oder Ausfrieren im Eiswasser reines Phoron erhalten wird.4. 1.74 kg of triacetone dialcohol and 2.1 kg of acetic anhydride will be used Boiled at reflux for i2 hours. After cooling, it is poured into water, from the diluted Acetic acid separated, the product washed neutral with soda solution, with calcium chloride dried and distilled. The whole thing goes from 18o to 195 'as a light yellow liquid about, from which pure by repeated distillation or freezing in ice water Phoron is obtained.
Die Ausbeute beträgt go °/o.The yield is about 100%.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI27235D DE483823C (en) | 1926-01-17 | 1926-01-17 | Process for the production of Phoron and Halbphoron (2íñ6-Dimethylhepten 2-ol 6-one 4) |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI27235D DE483823C (en) | 1926-01-17 | 1926-01-17 | Process for the production of Phoron and Halbphoron (2íñ6-Dimethylhepten 2-ol 6-one 4) |
Publications (1)
Publication Number | Publication Date |
---|---|
DE483823C true DE483823C (en) | 1929-10-23 |
Family
ID=7186718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI27235D Expired DE483823C (en) | 1926-01-17 | 1926-01-17 | Process for the production of Phoron and Halbphoron (2íñ6-Dimethylhepten 2-ol 6-one 4) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE483823C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1053497B (en) * | 1951-01-05 | 1959-03-26 | Eastman Kodak Co | Process for the production of terpene ketones and alcohols |
DE1127341B (en) * | 1955-08-26 | 1962-04-12 | Montedison Spa | Process for the production of diisobutyl ketone (isovalerone) |
-
1926
- 1926-01-17 DE DEI27235D patent/DE483823C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1053497B (en) * | 1951-01-05 | 1959-03-26 | Eastman Kodak Co | Process for the production of terpene ketones and alcohols |
DE1127341B (en) * | 1955-08-26 | 1962-04-12 | Montedison Spa | Process for the production of diisobutyl ketone (isovalerone) |
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