DE421785C - Process for purifying sulfur - Google Patents

Process for purifying sulfur

Info

Publication number
DE421785C
DE421785C DEB114948D DEB0114948D DE421785C DE 421785 C DE421785 C DE 421785C DE B114948 D DEB114948 D DE B114948D DE B0114948 D DEB0114948 D DE B0114948D DE 421785 C DE421785 C DE 421785C
Authority
DE
Germany
Prior art keywords
sulfur
remelting
purifying sulfur
purifying
alkali
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
DEB114948D
Other languages
German (de)
Inventor
Dr Ludwig Friederici
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to DEB114948D priority Critical patent/DE421785C/en
Application granted granted Critical
Publication of DE421785C publication Critical patent/DE421785C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/02—Preparation of sulfur; Purification
    • C01B17/0232—Purification, e.g. degassing

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Extraction Or Liquid Replacement (AREA)

Description

Verfahren zum Reinigen von Schwefel. Es ist bekannt, Schwefel durch unmittelbares Erhitzen mit Wasserdampf umzuschmelzen, was z. B. bei der Gewinnung von Schwefel aus natürlichen Lagerstätten oder aus Sodarückständen in Anwendung kommt. Man hat auch schon Kalkmilch zugesetzt, um überschüssige Säure zu binden und vorhandenes Arsensulfid herauszulösen. Man hat auch vorgeschlagen, zur Reinigung teerhaltigen Schwefels diesen mit Alkalilösungen unter Umrühren zu erwärmen. Dieses Verfahren gestattet jedoch nicht, ein völlig reines Produkt zu erzeugen, das insbesondere frei von anorganischen und vom Schwefeleingeschlossenen Verunreinigungen ist.Process for purifying sulfur. It is known to cause sulfur immediate heating with steam to melt what z. B. in extraction of sulfur from natural deposits or from soda residues in use comes. Lime milk has also been added to bind excess acid and dissolve any arsenic sulfide present. It has also been suggested for cleaning tar-containing sulfur to warm it with alkali solutions while stirring. This However, the method does not allow a completely pure product to be produced, in particular is free of inorganic and sulfur-entrapped impurities.

Es wurde nun gefunden, daß man unreinen Schwefel, besonders solchen, der Verunreinigungen in sehr fein verteilter Form enthält, durch Umschmelzen mit Wasser unter Druck vollständig reinigen kann, wenn man das Umschmelzen in Gegen-,vart kleiner Mengen von Alkalien oder alkalisch wirkenden Alkaiiverbindungen, z. B. Alkalisulfiden oder Alkaiicarbonaten, vornimmt. Schmilzt man z. B. Schwefel, wie er nach dem Verfahren des Patents 383317 durch Zersetzen von Ammoniumpolysulfidlösungen gewonnen wird, m#t Wasserdampf, so erhält man ein grünes Produkt, welches fein verteiltes Schwefeleisen mit einer Teilchengröße von 5 bis io l enthält. Beim Umschmelzen mit Wasser unter Druck und Zusatz von Schwefelnatriumlösung erhält man jedoch rein gelben Schwefel.It has now been found that impure sulfur, especially sulfur which contains impurities in a very finely divided form, by remelting with Can completely purify water under pressure if one remelting in counter-, vart small amounts of alkalis or alkaline alkali compounds, e.g. B. alkali sulfides or alkali carbonates. If you melt z. B. Sulfur as it is after the procedure of patent 383317 is obtained by decomposing ammonium polysulphide solutions, with water vapor, a green product is obtained, which is finely divided iron sulfur with a particle size of 5 to 10 l. When remelting with water under However, pure yellow sulfur is obtained by applying pressure and adding sodium sulphide solution.

Beispiel. in einen Autoklaven werden 3oo kg Schwefel in Stücken von Nußgröße, die infolge ihres Gehaltes an Schwefeleisen grün gefärbt sind, gegeben. Dann setzt man etwa i oo 1 einer Schwefelnatriumlösung mit einem Gesamtgehalt von 750 g Schwefelnatrium zu und erhitzt etwa z bis 3 Stunden lang durch direkten Dampf von 31/2 Atm. auf 135 bis i,lo°. Hierauf läßt man den geschmolzenen Schwefel in geeignete Gefäße ab. Der flüssige Schwefel hat eine honiggelbe Farbe. Mit dem letzten Rest des Schwefels, der besonders aufgefangen -werden kann., bläst man die auf diesem schwimmenden Verunreinigung--n heraus. Der Kessel steht darin sofort für die nächste Schmelze bereit.Example. 300 kg of sulfur in pieces the size of a nut, which are colored green due to their iron sulfur content, are placed in an autoclave. About 100 l of a sodium sulphide solution with a total content of 750 g of sodium sulphide is then added and the mixture is heated for about z to 3 hours by direct steam of 31/2 atm. on 135 to i, lo °. The molten sulfur is then drained into suitable vessels. The liquid sulfur is honey-yellow in color. With the last remainder of the sulfur, which can be caught in a special way, the impurities floating on this are blown out. The boiler is immediately ready for the next melt.

Claims (1)

PATENTANSPRUCH: Verfahren zum Reinigen von Schwefel durch Umschmelzen mit Wasser unter Druck, dadurch gekennzeichnet, daß man das Verfahren in Gegenwart verdünnter Lösungen von Alkalien oder alkalisch reagierenden Alkaliverbindungen durchführt. Claim: Process for cleaning sulfur by remelting it with water under pressure, characterized in that the process is carried out in the presence of dilute solutions of alkalis or alkaline-reacting alkali compounds.
DEB114948D 1924-07-22 1924-07-22 Process for purifying sulfur Expired DE421785C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB114948D DE421785C (en) 1924-07-22 1924-07-22 Process for purifying sulfur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB114948D DE421785C (en) 1924-07-22 1924-07-22 Process for purifying sulfur

Publications (1)

Publication Number Publication Date
DE421785C true DE421785C (en) 1925-11-17

Family

ID=6993889

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB114948D Expired DE421785C (en) 1924-07-22 1924-07-22 Process for purifying sulfur

Country Status (1)

Country Link
DE (1) DE421785C (en)

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