DE405238C - Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide - Google Patents

Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide

Info

Publication number
DE405238C
DE405238C DEF48674D DEF0048674D DE405238C DE 405238 C DE405238 C DE 405238C DE F48674 D DEF48674 D DE F48674D DE F0048674 D DEF0048674 D DE F0048674D DE 405238 C DE405238 C DE 405238C
Authority
DE
Germany
Prior art keywords
aluminum hydroxide
vapors
solids
well
drying gases
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
Application number
DEF48674D
Other languages
German (de)
Inventor
Dr Heinz Thienemann
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.)
Bayer AG
Original Assignee
Farbenfabriken Vorm Friedr Bayer and Co
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 Farbenfabriken Vorm Friedr Bayer and Co filed Critical Farbenfabriken Vorm Friedr Bayer and Co
Priority to DEF48674D priority Critical patent/DE405238C/en
Application granted granted Critical
Publication of DE405238C publication Critical patent/DE405238C/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

Verfahren zum Trocknen von Gasen und Dämpfen sowie zum Entwässern von Flüssigkeiten und festen Körpern mittels Aluminiumhydroxyds.Process for drying gases and vapors as well as for dewatering of liquids and solids by means of aluminum hydroxide.

Gefälltes Aluminiumhydroxyd hat, wie bekannt. die Eigentümlichkeit, sein Hydratwasser erst bei längerem Erhitzen auf helle Rotglut vollständig zu verlieren und in wasserfreies, unhygroskopisches Oxyd überzugehen. As is known, precipitated aluminum hydroxide has. the peculiarity to lose its water of hydration completely only after prolonged heating to bright red heat and to pass into anhydrous, unshygroscopic oxide.

Erhitzt man dagegen Aluminiumhydroxyd nur auf beginnende Rotglut und läßt zweckmäßig in einem geschlossenen Gefäß erkalten, so erhält man eine noch Wasser enthaltende Substanz, die äußerst hygroskopisch ist und bis zu 30 Prozent ihres Eigengewichts an Wasser aufnehmen kann. If, on the other hand, aluminum hydroxide is only heated to the beginning of red heat and let it cool down in a closed vessel, so you get one more Substance containing water, which is extremely hygroscopic and up to 30 percent can absorb their own weight in water.

Durch Erhitzen, am vorteilhaftesten auf 400 bis Goo", läßt sich das aufgenommene Wasser wieder entfernen, und das Aluminiumhydroxyd ist dann von neuem fähig, Wasser aufzunehmen. Gefällte Tonerde, zweckmäßig nicht zu grobkristallinisch, kann, wie gefunden wurde, vorteilhaft nach einer Vortrocknung auf etwa 100', durch Druck auf etwa 50 atom und mehr in feste Stücke gepreßt werden, welche die wertvolle Eigenschaft besitzen, daß sie bei der Entwässerung durch Erhitzen und bei der späteren Wasseraufnahme weder zerfallen noch praktisch bemerkbare Formänderungen erleiden. Solche Stücke eignen sich natürlich vorzüglich zum Trocknen von Gasen, Dämpfen, Luft usw. und zum Entwässern von Flüssigkeiten und festen Körpern. This can be done by heating, preferably to 400 to Goo " Remove the absorbed water again, and the aluminum hydroxide is then again able to absorb water. Precipitated clay, expediently not too coarsely crystalline, can, as has been found, advantageously after pre-drying to about 100 ' Pressure to about 50 atom and more are pressed into solid pieces, which are the valuable Have the property that they are dehydrated by heating and later Water absorption neither disintegrates nor suffer practically noticeable changes in shape. Such pieces are of course ideally suited for drying gases, vapors, Air etc. and for draining liquids and solids.

Das Verfahren kann beispielsweise zur Trocknung von Luft folgendermaßen angewandt werden: Man füllt das Hydroxyd in z. B. nußgroßen gepreßten Stückchen in ein Rohr, welches sich von außen oder von innen erhitzen läßt. Das Rohr wird bei gleichzeitiger Durchleitung von Luft so lange auf beginnende Rotglut erhitzt, bis der größte Teil des Wassers entfernt ist. Dann wird der Luftstrom und die Heizung abgestellt. For example, the method for drying air can be as follows be used: One fills the hydroxide in z. B. nut-sized pressed pieces into a tube that can be heated from the outside or the inside. The pipe will heated to incipient red heat with simultaneous passage of air, until most of the water is removed. Then the airflow and the heater switched off.

STach der Abkühlung, die natürlich unter Abschluß von feuchter Luft zu erfolgen hat, ist das Material verwendungsfähig.After cooling down, of course, with the exclusion of moist air the material is usable.

Ein so durchgeführter Versuch ergab z.B. bei einer Durchströmungsgeschwindigkeit von 3 cm sek. und einer 60 cm langen Absorptionsschicht in den ersten 5 Stunden eine Herabsetzung des Wassergehaltes der Luft von 0, OIU'4 g pro Liter auf 0,000015 g pro Liter. Im Laufe von 24 Stunden stieg allmählich der Wassergehalt der durchgeleiteten Luft auf 0,003 g pro Liter. Für die Güte des Verfahrens spricht die Tatsache, daß das frisch aktivierte Aluminiumhydroxyd gekörntem Chlorcalcium Wasser entzieht, also ein besseres Trocknungsmittel darstellt als diese vielverwandte Substanz. Das Aluminiumhydroxyd kann selbstverständlich auch zum Entwässern von Flüssigkeiten und festen Körpern verwendet werden. An experiment carried out in this way gave, for example, a flow rate of 3 cm sec. and a 60 cm long absorption layer for the first 5 hours a reduction in the water content of the air from 0. OIU'4 g per liter to 0.000015 g per liter. Over the course of 24 hours, the water content of the passed through rose gradually Air to 0.003 g per liter. The fact that the freshly activated aluminum hydroxide removes water from granular calcium chloride, So it is a better desiccant than this much-related substance. That Aluminum hydroxide can of course also be used for draining liquids and solid bodies.

Claims (1)

PATENT-AN SPRUCH: Verfahren zum Trocknen von Gasen und Dämpfen sowie zum Entwässern von Flüssigkeiten und festen Körpern mittels Aluminiumhydroxyds, das eine hohe Erhitzung erfahren hat, dadurch gekennzeichnet, daß man als Trockenmittel Aluminiumhydroxyd verwendet, das zu festen Stücken gepreßt und in dieser Form auf Rotglut (400 bis 600°) erhitzt worden ist. PATENT-AN SPRUCH: Process for drying gases and vapors as well for dewatering liquids and solids using aluminum hydroxide, which has experienced a high level of heating, characterized in that it is used as a desiccant Aluminum hydroxide is used, which is pressed into solid pieces and then opened in this form Red heat (400 to 600 °) has been heated.
DEF48674D 1921-02-25 1921-02-25 Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide Expired DE405238C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF48674D DE405238C (en) 1921-02-25 1921-02-25 Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF48674D DE405238C (en) 1921-02-25 1921-02-25 Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide

Publications (1)

Publication Number Publication Date
DE405238C true DE405238C (en) 1924-10-28

Family

ID=7102406

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF48674D Expired DE405238C (en) 1921-02-25 1921-02-25 Process for drying gases and vapors as well as for dewatering liquids and solids by means of aluminum hydroxide

Country Status (1)

Country Link
DE (1) DE405238C (en)

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