DE403506C - Device for the production of homogeneous crystals suitable for physical, especially optical purposes - Google Patents
Device for the production of homogeneous crystals suitable for physical, especially optical purposesInfo
- Publication number
- DE403506C DE403506C DEK85724D DEK0085724D DE403506C DE 403506 C DE403506 C DE 403506C DE K85724 D DEK85724 D DE K85724D DE K0085724 D DEK0085724 D DE K0085724D DE 403506 C DE403506 C DE 403506C
- Authority
- DE
- Germany
- Prior art keywords
- vessel
- physical
- production
- optical purposes
- crystals suitable
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0004—Crystallisation cooling by heat exchange
- B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D9/00—Crystallisation
- B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
Einrichtung zur Herstellung von bomogenen, für physikalische, insbesondere optische Zwecke geeigneten Kristallen. Es sind bereits Kristallisationsvorrichtungen bekannt, welche aus einem Auflösungsgefäß und einem Kristallisationsgefäß bestehen, welche durch zwei Rohre miteinander verbunden sind, von denen das eine als Kühlrohr ausgebildet ist. In dies-en Vorrichtungen zirkuliert mit Hilfe eines Rührers die Lösung üi der Richtung vom Auflösungsgefäß durch das Kühlrohr zum Kristallisationsgefäß und durch das zweite Rohr zum Auflösungsgefäß zurück. Da hierbei die Temperatur in dem Auflösungsgefäß z. B. durch eine fein einstellbare elektrische Heizung stets etwas höher gehalten wird als in dem Kristallisationsgefäß, so wird dem in diesem befindlichen Kristall durch das Kühlrohr hindurch stets eine etwas, aber in genau bestimmter Weise übersättigte Lösung zug#eführt, so daß der Kristall stetig und unbegrenzt wachsen kann.Device for the production of bomogeneous, for physical, in particular crystals suitable for optical purposes. There are already crystallizers known, which consist of a dissolving vessel and a crystallization vessel, which are connected by two pipes, one of which is used as a cooling pipe is trained. The circulates in these devices with the aid of a stirrer Solution in the direction from the dissolution vessel through the cooling tube to the crystallization vessel and back through the second tube to the dissolution vessel. Since this is the temperature in the dissolution vessel z. B. always by a finely adjustable electric heater is held a little higher than in the crystallization vessel, so will that in this one The crystal located through the cooling tube is always a little bit, but exactly In a certain way, supersaturated solution is fed in, so that the crystal is steady and can grow indefinitely.
Dabei hat sich aber gezeigt, daß aus dem Auflösungsgefäß kleine, unaufgelöste Kristallflöckchen leicht mitgerissen werden, die sich auf dem wachsenden Kristall iin Kristallisationsgefäß aufsetzen, als neue Kristallzentren wirken und soein Kristallkonglomera-t an Stelle eines einheitlichen Kristalls entstehen lassen, wie er insbesondere für optische Zwecke erforderlich ist.It has been shown, however, that small, undissolved ones from the dissolution vessel Flakes of crystal are easily carried away, which are reflected on the growing crystal Put it in the crystallization vessel, act as new crystal centers and thus create a crystal conglomerate in place of a single crystal, as it is especially for optical purposes is required.
Um diese Nachteile zu vermeiden, wird nach vorlieender Erfindung hiiiter dem Auf -lösungsgefäß noch ein weiteres Gefäß (Erhitzungsgefäß) eingeschaltet, dessen Temperatur um einige Grade oder jedenfalls um so viel höher gehalten wird, daß gegebenenfalls aus dem Auflösungsgefäß mitgerissene Kristallkeiine mit Sicherheit aufgelöst werden. Erst hinter diesem Gefäß wird die zirkulierende Lösung durch einen zwischengeschalteten Kühler o. dgl. auf die Temperatur des Kristallisationsgefäßes abgekühlt und diesem zugeführt.In order to avoid these disadvantages, according to the present invention will be described below Another vessel (heating vessel) is switched on to the dissolution vessel Temperature is kept a few degrees or at least so much higher that if necessary no crystals entrained from the dissolution vessel can be dissolved with certainty. Only after this vessel does the circulating solution pass through an intermediary Cooler or the like. Cooled to the temperature of the crystallization vessel and this fed.
Die Abbildung zeigt diese Anordnung von oben betrachtet.The figure shows this arrangement viewed from above.
A bedeutet das Kristallisationsgefäß, B das Auflösungsgefäß, C das Erhitzungsgefäß und D den Kühler. Die Pfeile geben die Zirkulationsrichtung der Lösung an. A means the crystallization vessel, B the dissolving vessel, C the heating vessel and D the cooler. The arrows indicate the direction of circulation of the solution.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK85724D DE403506C (en) | Device for the production of homogeneous crystals suitable for physical, especially optical purposes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK85724D DE403506C (en) | Device for the production of homogeneous crystals suitable for physical, especially optical purposes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE403506C true DE403506C (en) | 1924-10-06 |
Family
ID=7235437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK85724D Expired DE403506C (en) | Device for the production of homogeneous crystals suitable for physical, especially optical purposes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE403506C (en) |
-
0
- DE DEK85724D patent/DE403506C/en not_active Expired
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