DE4240306A1 - Use of methylcyclopentane as heat carrier at low temp - combining no increased viscosity at low temp, with no danger of freezing, and with biodegradability - Google Patents
Use of methylcyclopentane as heat carrier at low temp - combining no increased viscosity at low temp, with no danger of freezing, and with biodegradabilityInfo
- Publication number
- DE4240306A1 DE4240306A1 DE19924240306 DE4240306A DE4240306A1 DE 4240306 A1 DE4240306 A1 DE 4240306A1 DE 19924240306 DE19924240306 DE 19924240306 DE 4240306 A DE4240306 A DE 4240306A DE 4240306 A1 DE4240306 A1 DE 4240306A1
- Authority
- DE
- Germany
- Prior art keywords
- low temp
- methylcyclopentane
- danger
- freezing
- heat
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
In der Tieftemperatur-Technik sind Wärmeträger-Pumpenkreisläufe bekannt, um z. B. einen Reaktor für chemische Reaktionen bei tiefen Temperaturen oder eine Probenhalterung für analytische Zwecke zu kühlen. Dabei wird dem zu kühlenden Objekt die Wärme durch einen Kühlkreislauf entzogen, der einen Plattenwärme austauscher enthält, der mittels Flüssigstickstoff gekühlt wird. Das Kühlmittel bzw. der Wärmeträger wird im Kreislauf umgepumpt. Durch regeltechnische Maßnahmen wird dafür gesorgt, daß ein Zufrieren des Wärmetauschers vermieden wird. Als Wärmeträger wird bei Tieftemperatur-Kühlkreisläufen häufig Toluol verwendet. Damit können Vorlauftemperaturen von ca. -75°C erreicht werden. Für tiefere Tem peraturen ist Toluol jedoch als Wärmeträger ungeeignet.In low-temperature technology, heat transfer pump circuits are known to e.g. B. a reactor for chemical reactions at low temperatures or a Cool sample holder for analytical purposes. This is what is to be cooled Object the heat extracted through a cooling circuit, which is a plate heat contains exchanger that is cooled using liquid nitrogen. The coolant or the heat transfer medium is circulated. Through control measures care is taken to avoid freezing of the heat exchanger. When Heat transfer medium is often used in low-temperature cooling circuits. This allows flow temperatures of approx. -75 ° C to be reached. For lower temperatures temperatures, however, toluene is unsuitable as a heat transfer medium.
Überraschenderweise wurde gefunden, daß Methylcyclopentan als Wärmeträger in einem Temperaturbereich von +70° bis -130°C hervorragend geeignet ist. Insbesondere im Tieftemperatur-Bereich von -90°C bis -130°C zeigt Methyl cyclopentan überlegene Eigenschaften. Es hat sich herausgestellt, daß bei diesem Medium die Viskosität bei tiefen Temperaturen nur geringfügig zunimmt. In einem Kühlkreislauf zur Kühlung eines chemischen Reaktors konnte eine Vorlauftemperatur bis fast -130°c erreicht werden. Mit einer eingeregelten Arbeitstemperatur von -125°C im Vorlauf ließen sich ohne weiteres Reaktorinnen temperaturen bis -106°C einstellen. Die geringe Viskosität von Methylcyclopentan ermöglicht dabei einen optimalen Fluß des Wärmeträgers bei hohen Wärmeübertragungsraten, erheblich kürzeren Abkühlzeiten und sehr guten Kühlleistungen im gesamten Arbeitstemperaturbereich. Außerdem besteht kein Risiko mehr, daß der Wärmetauscher zufriert. Die besonderen Vorzüge von Methylcyclopentan kommen zwar überwiegend im Tieftemperaturbereich zum Tragen; es kann aber auch ohne weiteres bis zu Temperaturen von +70°C als Wärmeträger eingesetzt werden. Dieser breite Temperaturbereich ist von Vorteil, wenn Untersuchungen in entsprechend weiten Temperaturbereichen durchgeführt werden oder wenn solche Temperaturbereiche bei chemischen Reaktionen durchlaufen werden. Der Vorteil von Methylcyclopentan liegt dann darin, daß man mit einem einzigen Wärmeträger auskommt und nicht verschiedene Wärmeträger für die einzelnen Temperaturbereiche vorsehen muß.Surprisingly, it was found that methylcyclopentane as a heat carrier in a temperature range of + 70 ° to -130 ° C is ideal. Methyl shows especially in the low temperature range from -90 ° C to -130 ° C Cyclopentane superior properties. It has been found that this Medium the viscosity increases only slightly at low temperatures. In one Cooling circuit for cooling a chemical reactor could Flow temperature up to almost -130 ° C can be reached. With a regulated Working temperature of -125 ° C in the flow could be done without further reactors set temperatures down to -106 ° C. The low viscosity of methylcyclopentane enables an optimal flow of the heat transfer medium at high Heat transfer rates, significantly shorter cooling times and very good Cooling capacities in the entire working temperature range. Besides, there is none Risk more that the heat exchanger freezes. The special advantages of Methylcyclopentane are mainly used in the low temperature range Wear; but it can also be used up to temperatures of + 70 ° C Heat carriers are used. This wide temperature range is beneficial if investigations are carried out in correspondingly wide temperature ranges or if such temperature ranges in chemical reactions be run through. The advantage of methylcyclopentane is that: manages with a single heat transfer medium and not different heat transfer media must provide for the individual temperature ranges.
Ein weiterer Vorteil in der Verwendung von Methylcyclopentan besteht darin, daß Methylcyclopentan als biologisch abbaubarer, flüssiger Kohlenwasserstoff gegenüber Fluorchlorkohlenwasserstoffen als Wärmeträger erheblich günstiger zu bewerten ist.Another advantage of using methylcyclopentane is that Methylcyclopentane as a biodegradable, liquid hydrocarbon compared to chlorofluorocarbons as a heat transfer medium significantly cheaper evaluate.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924240306 DE4240306C2 (en) | 1992-12-01 | 1992-12-01 | Use of methylcyclopentane as a heat transfer medium for heat exchange at low temperatures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19924240306 DE4240306C2 (en) | 1992-12-01 | 1992-12-01 | Use of methylcyclopentane as a heat transfer medium for heat exchange at low temperatures |
Publications (2)
Publication Number | Publication Date |
---|---|
DE4240306A1 true DE4240306A1 (en) | 1994-06-09 |
DE4240306C2 DE4240306C2 (en) | 1994-09-29 |
Family
ID=6474055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19924240306 Expired - Fee Related DE4240306C2 (en) | 1992-12-01 | 1992-12-01 | Use of methylcyclopentane as a heat transfer medium for heat exchange at low temperatures |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4240306C2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0922916A3 (en) * | 1997-12-12 | 1999-09-15 | Messer Griesheim Gmbh | Method and device for cooling a heat carrier |
DE19853571C2 (en) * | 1998-11-20 | 2000-12-14 | Messer Griesheim Gmbh | Use of ethylcyclopentane as a heat transfer medium and method for cooling chemical reactors |
WO2001092436A1 (en) * | 2000-05-31 | 2001-12-06 | Linde Ag | Heat transfer medium for low temperatures |
EP1418216A1 (en) * | 2002-11-07 | 2004-05-12 | N.V. Solutia S.A. | Heat transfer fluids for application over a broad range of temperatures |
EP2075299A1 (en) * | 2007-12-19 | 2009-07-01 | Linde AG | Heat distributer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2839513B2 (en) * | 1977-09-13 | 1980-05-14 | Rhone-Poulenc Industries, Paris | Use of alkylcyclohexanes as heat exchangers |
-
1992
- 1992-12-01 DE DE19924240306 patent/DE4240306C2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2839513B2 (en) * | 1977-09-13 | 1980-05-14 | Rhone-Poulenc Industries, Paris | Use of alkylcyclohexanes as heat exchangers |
Non-Patent Citations (1)
Title |
---|
PLANK, R.: Handbuch der Kältetechnik, 4. Band, 1956, S. 432, Absatz 3 - S. 435, vorletzter Absatz * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0922916A3 (en) * | 1997-12-12 | 1999-09-15 | Messer Griesheim Gmbh | Method and device for cooling a heat carrier |
DE19853571C2 (en) * | 1998-11-20 | 2000-12-14 | Messer Griesheim Gmbh | Use of ethylcyclopentane as a heat transfer medium and method for cooling chemical reactors |
WO2001092436A1 (en) * | 2000-05-31 | 2001-12-06 | Linde Ag | Heat transfer medium for low temperatures |
EP1418216A1 (en) * | 2002-11-07 | 2004-05-12 | N.V. Solutia S.A. | Heat transfer fluids for application over a broad range of temperatures |
WO2004041958A1 (en) * | 2002-11-07 | 2004-05-21 | N.V. Solutia Europe S.A. | Heat transfer fluids for application over a broad range of temperatures |
CN1330734C (en) * | 2002-11-07 | 2007-08-08 | N.V.索卢蒂亚欧洲公司 | Heat transfer fluids for application over a broad range of temperatures |
EP2075299A1 (en) * | 2007-12-19 | 2009-07-01 | Linde AG | Heat distributer |
Also Published As
Publication number | Publication date |
---|---|
DE4240306C2 (en) | 1994-09-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: BAYER HEALTHCARE AG, 51373 LEVERKUSEN, DE |
|
8339 | Ceased/non-payment of the annual fee |