DE274348C - - Google Patents
Info
- Publication number
- DE274348C DE274348C DENDAT274348D DE274348DA DE274348C DE 274348 C DE274348 C DE 274348C DE NDAT274348 D DENDAT274348 D DE NDAT274348D DE 274348D A DE274348D A DE 274348DA DE 274348 C DE274348 C DE 274348C
- Authority
- DE
- Germany
- Prior art keywords
- dipentene
- rubber
- representation
- isoprene
- conversion
- 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
Links
- XMGQYMWWDOXHJM-UHFFFAOYSA-N (+-)-(RS)-limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 claims description 6
- 229930007650 limonene Natural products 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 3
- -1 compounds Hydrocarbons Chemical class 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 150000001993 dienes Chemical group 0.000 claims 1
- 239000003085 diluting agent Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 8
- 241000779819 Syncarpia glomulifera Species 0.000 description 3
- 229940036248 Turpentine Drugs 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000001739 pinus spp. Substances 0.000 description 3
- GRWFGVWFFZKLTI-UHFFFAOYSA-N (+-)-2-pinene Chemical group CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- 230000001476 alcoholic Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/22—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by depolymerisation to the original monomer, e.g. dicyclopentadiene to cyclopentadiene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- JVi 274348 KLASSE 12 o. GRUPPE- JVi 274348 CLASS 12 or GROUP
Zusatz zum Patent 249947.Addition to patent 249947.
Patentiert im Deutschen Reiche vom 14. April 1912 ab. Längste Dauer: 29. Dezember 1925.Patented in the German Empire on April 14, 1912. Longest duration: December 29, 1925.
Für diese Anmeldung ist bei der Prüfung gemäß dem Unionsvertrage vom ■For this registration, the examination according to the Union Treaty of ■
20. März 1883March 20, 1883
14. Dezember 1900 auf Grund der Anmeldung in Österreich vom 17. Mai 1911 anerkannt.Recognized on December 14, 1900 on the basis of the registration in Austria on May 17, 1911.
die Prioritätthe priority
Bekanntlich stellen die Terpentinöle keine einheitlichen Verbindungen dar, sie bilden vielmehr Gemische, die neben den Kohlenwasserstoffen der Pinengruppe auch andere Terpene und unter diesen Dipenten ^C10 H16) enthalten. Es wurde nun gefunden, daß bei der Darstellung von Isopren aus Terpenen durch pyrogenetische bzw. elektrothermische Reaktionen in erster Linie das Dipenten in Isopren übergeht; aus den übrigen Bestandteilen der Terpentinöle entsteht Isopren nur in geringerer Ausbeute, und zwar auch hier wahrscheinlich unter intermediärer Bildung von Dipenten.It is well known that turpentine oils are not uniform compounds, they rather form mixtures which, in addition to the hydrocarbons of the pinene group, also contain other terpenes and, among these, dipentene (C 10 H 16 ) . It has now been found that when isoprene is prepared from terpenes by pyrogenetic or electrothermal reactions, it is primarily the dipentene that converts into isoprene; from the other constituents of turpentine oils, isoprene is produced only in lower yield, and here too probably with intermediate formation of dipentene.
Auf Grund dieser Beobachtungen geht das erfundene Verfahren bei der Darstellung von zur Überführung in Kautschuk oder kautschukartige Massen geeigneten Kohlenwasserstoffen auf pyrogenetischem Wege statt von Terpentinölen direkt vom Dipenten aus, wel-Based on these observations, the invented method goes into the representation of hydrocarbons suitable for conversion into rubber or rubber-like compounds by pyrogenetic means instead of turpentine oils directly from the dipentene, which
ao eher Körper nach einer der bekannten Darstellungsweisen, beispielsweise aus Pinen durch Isomerisation oder unter dem Einfluß verdünnter alkoholischer Schwefelsäure gewonnen werden kann.ao rather body according to one of the well-known modes of representation, obtained for example from pinene by isomerization or under the influence of dilute alcoholic sulfuric acid can be.
In ein Gefäß mit Dipenten taucht ein durch den elektrischen Strom im Glühen erhaltener Silundstab ein. Das Gefäß ist mit einem Rückflußkühler verbunden. Man erhält so eine Ausbeute von etwa 60 Prozent Isopren vom Siedepunkt 35 bis 40 °.One immersed into a vessel with dipentene is one obtained by the electric current in the glow Silundstab a. The vessel is connected to a reflux condenser. A yield of about 60 percent isoprene is obtained in this way from boiling point 35 to 40 °.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE274348C true DE274348C (en) |
Family
ID=530723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT274348D Active DE274348C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE274348C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5303663A (en) * | 1992-05-08 | 1994-04-19 | Soil Injection Layering Systems, Inc. | Subsurface particle injection methods |
| US5868087A (en) * | 1995-06-19 | 1999-02-09 | Salestrom; Ronald D. | Agricultural water retention and flow enhancement mixture |
-
0
- DE DENDAT274348D patent/DE274348C/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5303663A (en) * | 1992-05-08 | 1994-04-19 | Soil Injection Layering Systems, Inc. | Subsurface particle injection methods |
| US5868087A (en) * | 1995-06-19 | 1999-02-09 | Salestrom; Ronald D. | Agricultural water retention and flow enhancement mixture |
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