EP0119392A1 - Agitateur magnétique chauffant pour dissolutions à haute température - Google Patents

Agitateur magnétique chauffant pour dissolutions à haute température Download PDF

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Publication number
EP0119392A1
EP0119392A1 EP84100372A EP84100372A EP0119392A1 EP 0119392 A1 EP0119392 A1 EP 0119392A1 EP 84100372 A EP84100372 A EP 84100372A EP 84100372 A EP84100372 A EP 84100372A EP 0119392 A1 EP0119392 A1 EP 0119392A1
Authority
EP
European Patent Office
Prior art keywords
magnetic stirrer
crucible
crucible base
heating coil
stirrer according
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
Application number
EP84100372A
Other languages
German (de)
English (en)
Other versions
EP0119392B1 (fr
Inventor
Gerhard Dr. Dipl.-Chem. Kudermann
Karl-Heinz Blaufuss
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke AG
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 Vereinigte Aluminium Werke AG filed Critical Vereinigte Aluminium Werke AG
Publication of EP0119392A1 publication Critical patent/EP0119392A1/fr
Application granted granted Critical
Publication of EP0119392B1 publication Critical patent/EP0119392B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L7/00—Heating or cooling apparatus; Heat insulating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
    • B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating

Definitions

  • the invention relates to a heatable magnetic stirrer for ochtemperaturank staying H, consisting of the drive unit; Tie g elstand Structure and energy source as they are for example used in the analysis.
  • Heatable magnetic stirrers are known for release processes, which have a heatable crucible stand surface made of non-magnetic steel or aluminum.
  • dissolving vessels for higher temperatures made of platinum or glassy carbon are known, into which the heat has to be transferred via the crucible stand area.
  • Heating plates are usually made of aluminum alloys or V-steel.
  • V steel has an adverse Ausdeh- now skostoryen g and tends Temperaturen.unter even at 400 ° C to warping (deformation).
  • the Al alloy usually AlSi, loses its mechanical stability from 470 ° C, becomes soft and leads to short circuits in the heating elements. It must also be noted that heating plates also heat up the permanent magnet of the stirrer and thus reduce its magnetic force. From 400 ° C lose Perman, entmagnete their Treasuremagnetei g characteris tics.
  • a short heating-up phase with correspondingly high temperatures is therefore subject to design and material limits. Due to the direct contact between the platinum crucible and the heating plate, diffusion phenomena occur at high temperatures, which lead to the formation of an alloy on the platinum surface and ultimately to local damage due to melting of the crucible.
  • a radiation plate can be arranged, which consists of non-magnetic material and shields the heating coil to the magnetic stirrer.
  • connection ends of the heating coil are connected to an energy source below the crucible base area.
  • a magnetic stirrer is shown schematically in the figure, the zone of the heating coil being shown in cross section.
  • the drive unit 2 is connected to the crucible base of the ceramic magnetic stirrer via a stand 3.
  • the drive unit contains the agitator motor, which is supplied by a controllable energy source 1.
  • the heating coils 6 are arranged above the crucible base area 5.
  • the heated crucible chamber is surrounded by a radiation plate 10 with a lid 11 open in the middle, which on the one hand additionally prevents heat transfer to the permanent magnet and the drive unit and on the other hand ensures the required temperature by retroreflection of the radiated heat.
  • the connections 7, 8 of the heating coil are attached to energy source 1 below the crucible stand area.
  • a platinum crucible with a stir bar 4b can be seen inside the heating coil.
  • the crucible 9 is heated laterally by the heating coil 6, with the risk of diffusion being eliminated via a crucible standing surface.
  • the heating coil reached Temperatures of approx. 800 ° C without danger to the crucible, permanent magnet, heating feed and drive unit.
  • the device unit can be provided with a shield 12.
  • the crucible standing area 5 can be designed in such a way that different crucible standing heights result. As a result, small crucibles can be inserted into the heating coil in such a way that the upper edge protrudes from the cover 11. On the other hand, with large crucibles it is possible to change the heat affected zone by using different crucible heights.
  • a comparative example was now carried out using a conventional magnetic stirrer.
  • the heating plate had to be insulated with mineral wool on the side surfaces so that the steel plate could reach a temperature of approx. 500 ° C.
  • a platinum crucible with a capacity of approx. 50 ml was filled with 85% phosphoric acid as a solvent and aluminum oxide which was difficult to digest was introduced therein with stirring.
  • aluminum oxide came 12 g of phosphoric acid.
  • reaction mixture had already tended to spray during the digestion. After the digestion had ended, insoluble precipitates had formed in the phosphoric acid - presumably due to local overheating - which could later be identified as polyphosphates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Accessories For Mixers (AREA)
  • General Induction Heating (AREA)
EP84100372A 1983-03-12 1984-01-16 Agitateur magnétique chauffant pour dissolutions à haute température Expired EP0119392B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3308892 1983-03-12
DE19833308892 DE3308892A1 (de) 1983-03-12 1983-03-12 Heizbarer magnetruehrer fuer hochtemperaturaufschluesse

Publications (2)

Publication Number Publication Date
EP0119392A1 true EP0119392A1 (fr) 1984-09-26
EP0119392B1 EP0119392B1 (fr) 1987-07-22

Family

ID=6193311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100372A Expired EP0119392B1 (fr) 1983-03-12 1984-01-16 Agitateur magnétique chauffant pour dissolutions à haute température

Country Status (6)

Country Link
US (1) US4568192A (fr)
EP (1) EP0119392B1 (fr)
JP (1) JPS59196721A (fr)
AU (1) AU558103B2 (fr)
DE (2) DE3308892A1 (fr)
ZA (1) ZA841834B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218883A (en) * 1988-05-16 1989-11-22 High Pet Enterprise Co Ltd Magnetic hot plate

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628594B2 (ja) * 1985-08-07 1994-04-20 東ソー株式会社 生化学反応用撹拌装置
KR0121130B1 (ko) * 1994-10-27 1997-11-10 구자홍 교반 유체의 중량감지방법 및 장치
US5891526A (en) * 1995-12-01 1999-04-06 International Business Machines Corporation Apparatus for mixing a multi-component encapsulant and injecting it through a heated nozzle onto a part to be encapsulated
US5834739A (en) * 1996-11-05 1998-11-10 Barnstead/Thermolyne Corporation Stirring hot plate
GB9719774D0 (en) * 1997-09-18 1997-11-19 Glaxo Group Ltd Device
AU2002367781A1 (en) * 2001-10-19 2003-11-03 Sri International Device and method for handling reaction components
US8474369B2 (en) * 2004-11-26 2013-07-02 Walter B. Herbst Electric skillet with magnetic self-reversing stirrer that is removable
GB2463691B (en) * 2008-09-23 2013-08-21 John White Electric heating element conversion apparatus
CN102631179B (zh) * 2012-04-25 2014-08-06 重庆天如生物科技有限公司 胃肠镜诊疗用视野清晰度增强系统
WO2016061526A1 (fr) 2014-10-17 2016-04-21 Sani-Tech West, Inc. Système et procédé de mélange et de filtration
US10406526B1 (en) * 2015-08-26 2019-09-10 Bernard Robert McKellar Convertible hotplate adapter for rounded vessels and the like
CN105935608B (zh) * 2016-06-14 2018-02-09 河南师范大学 一种电磁平板一体式加热装置
US10426180B1 (en) 2016-06-16 2019-10-01 Sigma Phase, Corp. System for providing a single serving of a frozen confection
JP6971311B2 (ja) 2016-06-16 2021-11-24 コールドスナップ コーポレイション １杯分の冷凍菓子を提供するためのシステム
WO2019213334A1 (fr) * 2018-05-03 2019-11-07 Rpg Imx Llc Systèmes magnétiques de mélange
US10543978B1 (en) 2018-08-17 2020-01-28 Sigma Phase, Corp. Rapidly cooling food and drinks
US11470855B2 (en) 2018-08-17 2022-10-18 Coldsnap, Corp. Providing single servings of cooled foods and drinks
US10612835B2 (en) 2018-08-17 2020-04-07 Sigma Phase, Corp. Rapidly cooling food and drinks
WO2020178051A1 (fr) * 2019-03-05 2020-09-10 Abb Schweiz Ag Cuve de fusion de verre continue à corps d'agitation immergé
US11337438B2 (en) 2020-01-15 2022-05-24 Coldsnap, Corp. Rapidly cooling food and drinks
TW202202790A (zh) 2020-06-01 2022-01-16 美商寇德斯納普公司 用於快速冷卻食物及飲料的冷凍系統
CN112892266B (zh) * 2021-01-17 2022-11-22 惠州德斯坤化工有限公司 一种节能型油墨搅拌过滤设备
US11827402B2 (en) 2021-02-02 2023-11-28 Coldsnap, Corp. Filling aluminum cans aseptically
CN114272830B (zh) * 2021-12-27 2023-08-29 浙江大学温州研究院 一种用于高温化学反应的抗污染磁力搅拌子
CN115183582B (zh) * 2022-08-03 2025-05-16 江西万泰铝业有限公司 一种多维度铝锭熔铸坩埚

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151246B (de) * 1959-10-17 1963-07-11 Dr Hans Fuhrmann Ruehrvorrichtung
GB982957A (en) * 1962-08-16 1965-02-10 Atomic Energy Authority Uk Improvements in or relating to electrical heaters
DE1638968A1 (de) * 1967-06-22 1972-02-24 Manfred Zipperer Elektronisch gesteuertes Magnetruehrgeraet
DE2331228B2 (de) * 1973-06-19 1976-08-26 Internationale Laboratoriums-Apparate Gmbh, 7801 Ballrechten-Dottingen Magnetruehrgeraet
DE2844040A1 (de) * 1978-10-09 1980-04-17 Gerhardt Fabrik Und Lager Chem Heizgeraet mit formveraenderlichem rohrheizkoerper

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535731A (en) * 1949-03-17 1950-12-26 Lyonel L Goodenrath Electrician's solder dipper heater
US2518758A (en) * 1949-06-22 1950-08-15 George B Cook Magnetic stirring apparatus
US3028476A (en) * 1960-03-22 1962-04-03 Arthur H Thomas Company Hot plate and magnetic stirrer
US3433465A (en) * 1967-05-29 1969-03-18 Roman Szpur Magnetic mixing and stirring device
FR1570922A (fr) * 1967-06-22 1969-06-13
GB1288014A (fr) * 1971-05-06 1972-09-06
DE2144372A1 (de) * 1971-09-04 1973-03-15 Dirk Sijsling Magnetruehrmaschine
US3766360A (en) * 1972-08-07 1973-10-16 Biospectrum Inc Laboratory hot plate
US3864088A (en) * 1973-03-06 1975-02-04 Maihak Ag Apparatus for determining the content of organic substances in water
US3790749A (en) * 1973-03-26 1974-02-05 R Lee Electric lead pot with increased efficiency
AT371719B (de) * 1980-08-25 1983-07-25 Immuno Ag Verfahren und vorrichtung zur beschleunigung des aufloesens von schwerloeslichen lyophilisierten arzneimitteln
JPS57169428U (fr) * 1981-04-21 1982-10-25

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151246B (de) * 1959-10-17 1963-07-11 Dr Hans Fuhrmann Ruehrvorrichtung
GB982957A (en) * 1962-08-16 1965-02-10 Atomic Energy Authority Uk Improvements in or relating to electrical heaters
DE1638968A1 (de) * 1967-06-22 1972-02-24 Manfred Zipperer Elektronisch gesteuertes Magnetruehrgeraet
DE2331228B2 (de) * 1973-06-19 1976-08-26 Internationale Laboratoriums-Apparate Gmbh, 7801 Ballrechten-Dottingen Magnetruehrgeraet
DE2844040A1 (de) * 1978-10-09 1980-04-17 Gerhardt Fabrik Und Lager Chem Heizgeraet mit formveraenderlichem rohrheizkoerper

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218883A (en) * 1988-05-16 1989-11-22 High Pet Enterprise Co Ltd Magnetic hot plate

Also Published As

Publication number Publication date
JPS59196721A (ja) 1984-11-08
US4568192A (en) 1986-02-04
DE3464999D1 (en) 1987-08-27
EP0119392B1 (fr) 1987-07-22
AU558103B2 (en) 1987-01-15
DE3308892A1 (de) 1984-09-13
AU2549784A (en) 1984-09-13
JPH0144087B2 (fr) 1989-09-26
ZA841834B (en) 1984-10-31

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