DE404906C - Process for the transfer of crystallizable, amorphous, solid substances into the crystalline state - Google Patents
Process for the transfer of crystallizable, amorphous, solid substances into the crystalline stateInfo
- Publication number
- DE404906C DE404906C DER59690D DER0059690D DE404906C DE 404906 C DE404906 C DE 404906C DE R59690 D DER59690 D DE R59690D DE R0059690 D DER0059690 D DE R0059690D DE 404906 C DE404906 C DE 404906C
- Authority
- DE
- Germany
- Prior art keywords
- amorphous
- crystallizable
- crystalline state
- transfer
- solid substances
- 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
- 239000000126 substance Substances 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- 239000007787 solid Substances 0.000 title claims description 4
- 239000013078 crystal Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 235000000346 sugar Nutrition 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000021552 granulated sugar Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000002255 vaccination Methods 0.000 description 1
Classifications
-
- 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)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Description
Verfahren zur Überführung kristallisierbarer, amorpher, fester Stoffe in den kristallinischen Zustand.Process for transferring crystallizable, amorphous, solid substances in the crystalline state.
Es tritt in der Technik häufig der Fall ein, daß Stoffe, die an und für sich Kristallform besitzen, im Laufe der Herstellung int amorphen Zustande erhalten werden. Dies ist besonders häufig hei der Zerstäubungstrocknung der Fall, weil hier die Trocknungszeit oft bedeutend kürzer ist als die zual Auskristallisieren erforderliche Dauer. It is often the case in technology that substances that are on and possess crystal form in their own right, obtained in the course of manufacture in an amorphous state will. This is particularly often the case with spray drying because here the drying time is often significantly shorter than the time required to crystallize out Duration.
Das Vorliegen der Stoffe im amorphen Zustande ist insofern von Nachteil, als sie in diesen Zustande unansehnlicher sind tmd auch nicht die Festigkeit und Beständigkeit aufweisen, wie ihre kristallinischen Modifikationen. Besonders die Empfindlichkeit für Luftfeuchtigkeit macht sich unangenehm bemerkbar. Läßt man z. B. amorphen Zucker an der Luft liegen, so zerfließt er zu einem zähflüssigen Brei, während Kristallzucker, selbst wenn er mit Luft von go Prozent relativetn Feuchtigkeitsgehalt in Berührung steht, seinen Zustand nicht ändert. Nun ist es bekannt, daß man übersättigte Lösungen durch Impfen mit Kristallen zur Kristallisation bringen kann. Auch bei Schmelzen macht man hiervon Gebrauch, um sie aus dem unterkühlen, flüssigen Zustand zur Kristallisation zu bringen. Die Versuche, bei amorphen, festen Körpern die Kristallisation durch Impfen anzuregen, scheiterten jedoch vollständig. Es gelang nicht, eine Umwandlung durchzuführen.The presence of the substances in the amorphous state is disadvantageous in that than they are more unsightly in these states and neither are the firmness and Have persistence, as do their crystalline modifications. Especially those Sensitivity to humidity is noticeable in an unpleasant way. If you let z. B. amorphous sugar is in the air, it melts into a viscous pulp, while granulated sugar, even if it is with air of go percent relative moisture content is in contact, does not change its state. It is now known to be oversaturated Can crystallize solutions by seeding them with crystals. Also at Melting makes use of this to bring them out of the supercool, liquid state bring to crystallization. Attempts to crystallize amorphous, solid bodies to stimulate by vaccination, however, failed completely. A conversion failed perform.
Überraschenderweise zeigte es sich nun, daß dieses dennoch möglich ist, wenn man in die amorphe Masse Impfkristalle aussät und dann die Mischung einem Drucke aussetzt.Surprisingly, it turned out that this is still possible is when one sows seed crystals into the amorphous mass and then the mixture gives one Suspends prints.
Es werden hierdurch die Stoffteilchen in genügend innige Berührung mit den Impfkristallen gebracht. Gleichzeitig kann dieser Vorgang zur Formgebung benutzt werden. wodurch eine Ersparnis an maschinellen Einrichtungen erreicht wird.As a result, the particles of material come into close enough contact brought with the seed crystals. At the same time, this process can be used for shaping to be used. whereby a saving in machine equipment is achieved.
50 kg amorpher Zucker werden mit 0,5 kg krilstalllisiertem Zucker innig vermengt. Die Alischung wird dann in einer hydraulischen Presse einem Druck von mehreren Atmosphären zwei Stunden ausgesetzt. Hierauf wird der Preßkuchen der Presse entnommen und einige Stunden sich selbst überlassen, in welcher Zeit die Kristallisation vor sich geht. 50 kg of amorphous sugar are mixed with 0.5 kg of crystallized sugar intimately mixed. The mixture is then pressurized in a hydraulic press exposed to several atmospheres for two hours. Then the press cake becomes the Press removed and left to itself for a few hours, in what time the Crystallization is going on.
Nach Ablauf des Vorganes wird der Zucker mit Knippmaschine in üblicher Weise in NVürfel geteilt.At the end of the process, the sugar is knocked out in the usual way Way divided into N-cubes.
Selbstverständlich ist dieses Verfahren auch auf andere Stoffe anwendbar und kann es die verschiedensten Ausgestaltungen in bezug auf Dauer und Stärke der Pressung erfahren. Of course, this procedure can also be used for other substances and it can take the most varied forms in terms of duration and strength of the Experience pressing.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER59690D DE404906C (en) | 1923-11-02 | 1923-11-02 | Process for the transfer of crystallizable, amorphous, solid substances into the crystalline state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER59690D DE404906C (en) | 1923-11-02 | 1923-11-02 | Process for the transfer of crystallizable, amorphous, solid substances into the crystalline state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE404906C true DE404906C (en) | 1924-10-23 |
Family
ID=7411145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DER59690D Expired DE404906C (en) | 1923-11-02 | 1923-11-02 | Process for the transfer of crystallizable, amorphous, solid substances into the crystalline state |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE404906C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2135539A1 (en) * | 1971-06-09 | 1972-12-28 | Kobe Steel Ltd., Kobe (Japan) | Method and device for separating a substance |
-
1923
- 1923-11-02 DE DER59690D patent/DE404906C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2135539A1 (en) * | 1971-06-09 | 1972-12-28 | Kobe Steel Ltd., Kobe (Japan) | Method and device for separating a substance |
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