DE412697C - Processing of sulphite waste liquor - Google Patents

Processing of sulphite waste liquor

Info

Publication number
DE412697C
DE412697C DEA40860D DEA0040860D DE412697C DE 412697 C DE412697 C DE 412697C DE A40860 D DEA40860 D DE A40860D DE A0040860 D DEA0040860 D DE A0040860D DE 412697 C DE412697 C DE 412697C
Authority
DE
Germany
Prior art keywords
waste liquor
processing
sulphite waste
sulphite
sulfur
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
DEA40860D
Other languages
German (de)
Inventor
Dipl-Ing Max Steinschneider
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.)
ZELLSTOFF und PAPIERFABRIKATIO
Original Assignee
ZELLSTOFF und PAPIERFABRIKATIO
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 ZELLSTOFF und PAPIERFABRIKATIO filed Critical ZELLSTOFF und PAPIERFABRIKATIO
Priority to DEA40860D priority Critical patent/DE412697C/en
Application granted granted Critical
Publication of DE412697C publication Critical patent/DE412697C/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
    • C01B17/06—Preparation of sulfur; Purification from non-gaseous sulfides or materials containing such sulfides, e.g. ores

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Description

Aufarbeitung von Sulfitablauge. Bei den bisherigen Versuchen, die Ablauge der Sulfitzellstoffabrikation durch Verkoken nutzbar zu machen, war das Hauptaugenmerk darauf gerichtet, einerseits eine möglichst hohe Ausbeute an Nebenprodukten (Essigsäure, Aceton usw.), anderseits eine Äbsorptionskohle von hohem Wirkungsgrad zu gewinnen. Zu diesem Zweck wurde die Ablauge auf sehr hohe Temperaturen, nämlich solche über 700°, erhitzt und Kalk und Soda zur eingedickten Ablauge zugesetzt. Bei dieser Arbeitsweise ging aber der gesamte Schwefelgehalt der Ablauge restlos verloren.Processing of sulphite waste liquor. In previous attempts that That was to make the waste liquor from the sulphite pulp production usable by coking The main focus is on the one hand the highest possible yield of by-products (Acetic acid, acetone, etc.), on the other hand a high-efficiency absorption carbon to win. For this purpose, the waste liquor was heated to very high temperatures, viz those over 700 °, heated and lime and soda added to the thickened waste liquor. With this method of operation, however, the entire sulfur content of the waste liquor went completely lost.

Die Erfindung betrifft nun ein Verfahren zur Aufarbeitung von Sulfitzelluloseablaugen, das außer der Herstellung der bisherigen, aus der Lauge gewinnbaren Produkte auch eine vollständige Wiedergewinnung des Schwefels der Ablauge gestattet. Dieser Effekt wird erreicht, daß das Abschwelen der zur Trockne eingedampften Ablauge bei Temperaturen unter 25o° ausgeführt wird und die hierbei entstehenden Gase, um eine Zersetzung zu vermeiden, durch Arbeiten- unter vermindertem Druck möglichst rasch abgeführt werden.The invention now relates to a method for processing sulphite cellulose waste liquors, this is also the case, apart from the manufacture of the previous products that could be extracted from the lye a complete recovery of the sulfur of the waste liquor is allowed. This effect it is achieved that the depletion of the waste liquor evaporated to dryness at temperatures is carried out below 25o ° and the resulting gases cause a decomposition to avoid, by working under reduced pressure as quickly as possible removed will.

Auf diese Weise ist es möglich, den gesamten Schwefel der Ablauge in fein verteilter Form wiederzugewinnen und damit eine neue Quelle zur Schwefelherstellung im Inlande zu erschließen. Durch nachträgliche Steigerung der Temperatur ist es dann auch ohne irgendwelche Zusätze möglich, die bisher erzielten Nebenprodukte der Destillation zu gewinnen sowie eine Absorptionskohle von hohem Wirkungswert zu erhalten.In this way it is possible to remove all of the sulfur in the waste liquor recovered in finely divided form and thus a new source for sulfur production to be developed domestically. By subsequently increasing the temperature, it is then also possible without any additives, the by-products achieved so far distillation as well as an absorption carbon of high efficiency to obtain.

Die Reaktion bei der Abschwelung der eingedickten Ablauge geht so vor sich, daß die SO" der Aldehyd-Schwefligen-Säure-Gruppe als solche abgespalten wird, während die festgebundenen S-Gruppen zu H,S reduziert werden. Die Umsetzung zu molekularem S geht dann nach der bekannten Reaktion vor sich. ZSOZ+3C---2C0+CO2+2S CO, TH2S=--CO+S+H20.The reaction when the thickened waste liquor subsides takes place in such a way that the SO "of the aldehyde-sulfuric acid group is split off as such, while the firmly bound S groups are reduced to H, S. The conversion to molecular S then proceeds after the known reaction in front of you: ZSOZ + 3C --- 2C0 + CO2 + 2S CO, TH2S = - CO + S + H20.

Claims (1)

PATENT-ANsPRÜCHE: i. Verfahren zur Aufarbeitung von Sulfitablauge, dadurch gekennzeichnet, daß zwecks Wiedergewinnung des Schwefels die zur Trockne .eingedickte Ablauge bei Temperaturen unter 250° unter vermindertem Druck abgeschwelt wird. i. Ausführungsform des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß der gewonnene Halbkoks ohne Zusätze auf höhere Temperaturen im Vakuum erhitzt wird.PATENT CLAIMS: i. Process for the processing of sulphite waste liquor, characterized in that, for the purpose of recovering the sulfur, drying to dryness .thickened waste liquor sloughed off at temperatures below 250 ° under reduced pressure will. i. Embodiment of the method according to claim i, characterized in that that the semi-coke obtained is heated to higher temperatures in a vacuum without additives will.
DEA40860D 1923-10-25 1923-10-25 Processing of sulphite waste liquor Expired DE412697C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA40860D DE412697C (en) 1923-10-25 1923-10-25 Processing of sulphite waste liquor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA40860D DE412697C (en) 1923-10-25 1923-10-25 Processing of sulphite waste liquor

Publications (1)

Publication Number Publication Date
DE412697C true DE412697C (en) 1925-04-25

Family

ID=6932192

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA40860D Expired DE412697C (en) 1923-10-25 1923-10-25 Processing of sulphite waste liquor

Country Status (1)

Country Link
DE (1) DE412697C (en)

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