DE306724C - - Google Patents
Info
- Publication number
- DE306724C DE306724C DENDAT306724D DE306724DA DE306724C DE 306724 C DE306724 C DE 306724C DE NDAT306724 D DENDAT306724 D DE NDAT306724D DE 306724D A DE306724D A DE 306724DA DE 306724 C DE306724 C DE 306724C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- alcohol
- solvent naphtha
- diluted
- alcohols
- 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.)
- Active
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- 125000003118 aryl group Chemical group 0.000 claims description 3
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- 150000002391 heterocyclic compounds Chemical class 0.000 claims description 2
- 239000012442 inert solvent Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000006011 modification reaction Methods 0.000 claims 1
- 235000019441 ethanol Nutrition 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N Tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CWRYPZZKDGJXCA-UHFFFAOYSA-N Acenaphthene Chemical compound C1=CC(CC2)=C3C2=CC=CC3=C1 CWRYPZZKDGJXCA-UHFFFAOYSA-N 0.000 description 1
- 230000001476 alcoholic Effects 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- AMQJEAYHLZJPGS-UHFFFAOYSA-N n-pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/02—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation
- C07C5/10—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation of aromatic six-membered rings
- C07C5/11—Partial hydrogenation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Durch das Hauptpatent ist ein Verfahren zur Darstellung aromatischer isocyklischer und heterocyklischer Hydrobasen geschützt, welches darin besteht, daß man in Gegenwart indifferenter Lösungsmittel Alkalimetalle oder Erdalkalimetalle und Alkohole auf die ,zu reduzierenden Basen einwirken läßt.The main patent is a process for the preparation of aromatic isocyclic and Protected heterocyclic hydrobases, which consists in being more indifferent in the presence Solvent alkali metals or alkaline earth metals and alcohols on the ones to be reduced Allow bases to act.
Bei weiterer Prüfung wurde nun gefunden, daß dieses Verfahren auch auf nicht amidierte aromatische isocyklische und heterocyklische Verbindungen angewendet werden kann.On further examination it has now been found that this process also applies to non-amidated aromatic isocyclic and heterocyclic compounds can be applied.
Dieses Verfahren hat gegenüber den von Bamberger und anderen Autoren (s. z. B. Ber. 21 (1888) S. 852 und 1124, sowie Ber. 20.Compared to that of Bamberger and other authors (see e.g. Ber. 21 (1888) pp. 852 and 1124, and Ber. 20th
S. 2916) beschriebenen Verfahren der Hydrierung mittels Alkalimetalle den Vorzug, daß bei der Fabrikation der teure und gesundheitsschädliche Amylalkohol, der nach den bekannten Verfahren stets verwendet werden muß, ζ. B. durch den harmlosen und billigen Äthylalkohol vollkommen ersetzt werden kann. Außerdem zeichnet sich das Verfahren durch eine große Betriebssicherheit und Regulierbarkeit aus, weil z. B. einerseits die leicht ent- zündbaren Alkalimetalle hier" dauernd von einem indifferenten Lösungsmittel bedeckt bleiben können, und andererseits durch Unterbrechung des Alkoholzuflusses die Reaktion jederzeit zum Stillstand gebracht werden kann.S. 2916) described method of hydrogenation by means of alkali metals has the advantage that in the manufacture of the expensive and harmful amyl alcohol, which according to the well-known Procedure must always be used, ζ. B. by the harmless and cheap ethyl alcohol can be completely replaced. In addition, the procedure is characterized by great operational reliability and controllability, because z. B. on the one hand the easily ignitable alkali metals here "remain permanently covered by an inert solvent can, and on the other hand, by interrupting the flow of alcohol, the reaction can be brought to a standstill at any time.
30 Beispiel 1. 30 Example 1.
Tetrahydronäphtalin.Tetrahydronaphthalene.
96 Teile Naphtalin, 800 Teile Solventnaphta und 140 Teile metallisches Natrium werden auf 145 ° angewärmt. Hierzu gibt man bei einer Temperatur von 140 bis 145 ° in dünnem Strahl 280 bis 300 Teile Äthylalkohol und setzt nach beendigter Hydrierung noch 600 Teile Alkohol hinzu. Zur Aufarbeitung wird mit Wasser verdünnt und sodann die verdünnte, alkoholische Natronlauge von dem in Solventnaphta gelösten Tetrahydronäphtalin getrennt. Durch fraktionierte Destillation wird es in reinem Zustand gewonnen. .96 parts of naphthalene, 800 parts of solvent naphtha and 140 parts of metallic sodium warmed to 145 °. For this purpose, it is added at a temperature of 140 to 145 ° in thin Beam 280 to 300 parts of ethyl alcohol and sets another 600 after the hydrogenation is complete Add alcohol. For work-up, it is diluted with water and then the diluted, Alcoholic caustic soda from tetrahydronaphthalene dissolved in solvent naphtha separated. It is obtained in a pure state by fractional distillation. .
Tetrahydrodiphenyl.Tetrahydrodiphenyl.
154 Teile Diphenyl, 1000 Teile Solventnaphta oder Ligröin vom Siedepunkt 140 bis 160° und 160 Teile metallisches Natrium werden auf 140 ° angewärmt. Zu der heißen Mischung läßt man · in dünnem Strahl 320 Teile Äthylalkohol und 100 Teile Solventnaphta oder Ligroin einlaufen, wobei die Temperatur auf 140 bis 150° gehalten wird. Darauf gibt man noch 500 Teile Alkohol hinzu, kocht einige Zeit unter154 parts of diphenyl, 1000 parts of solvent naphtha or Ligröin with a boiling point of 140 to 160 ° and 160 parts of metallic sodium are heated to 140 ° warmed up. 320 parts of ethyl alcohol are added to the hot mixture in a thin stream and 100 parts of solvent naphtha or ligroin, the temperature being kept at 140 to 150 °. You spend another 500 on that Add alcohol, boil in for a while
Rückfluß, /' verdünnt mit Wasser und trennt nach Beispie^i. 'Reflux, / 'diluted with water and separates according to example. '
Das erhaltene Tetrahydrodiphenyl siedet beiThe tetrahydrodiphenyl obtained boils at
gewöhnlichem Druck bei 247 bis 24g0 oder bei ip'bis 12 mm Druck bei '115"bis ii8°.normal pressure at 247 to 24g 0 or with ip 'up to 12 mm pressure at' 115 "to ii8 °.
Unterwirft man Acenaphten dem vorliegenden ",Υerfahren, so wird es in Tetrahydroacenapliten übergeführt.If acenaphthene is subjected to the present ", it becomes tetrahydroacenaplites convicted.
Die/ Ausbeuten betragen nach obigen Beispielen 80 bis 90 Prozent der Theorie. .The / yields are according to the above examples 80 to 90 percent of theory. .
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE306724C true DE306724C (en) |
Family
ID=560115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT306724D Active DE306724C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE306724C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2473997A (en) * | 1947-06-26 | 1949-06-21 | Du Pont | Partial reduction of polycyclic aromatic hydrocarbons |
US3449453A (en) * | 1967-08-18 | 1969-06-10 | Nat Distillers Chem Corp | Process for hydrogenating naphthalene to 1,4-dihydronaphthalene |
-
0
- DE DENDAT306724D patent/DE306724C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2473997A (en) * | 1947-06-26 | 1949-06-21 | Du Pont | Partial reduction of polycyclic aromatic hydrocarbons |
US3449453A (en) * | 1967-08-18 | 1969-06-10 | Nat Distillers Chem Corp | Process for hydrogenating naphthalene to 1,4-dihydronaphthalene |
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