DE397604C - Process for the preparation of products containing chlorine from pulp waste liquors - Google Patents

Process for the preparation of products containing chlorine from pulp waste liquors

Info

Publication number
DE397604C
DE397604C DEST34991D DEST034991D DE397604C DE 397604 C DE397604 C DE 397604C DE ST34991 D DEST34991 D DE ST34991D DE ST034991 D DEST034991 D DE ST034991D DE 397604 C DE397604 C DE 397604C
Authority
DE
Germany
Prior art keywords
preparation
pulp waste
waste liquors
products containing
containing chlorine
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
DEST34991D
Other languages
German (de)
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.)
HUGO STINNES FA
Original Assignee
HUGO STINNES FA
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 HUGO STINNES FA filed Critical HUGO STINNES FA
Priority to DEST34991D priority Critical patent/DE397604C/en
Application granted granted Critical
Publication of DE397604C publication Critical patent/DE397604C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07GCOMPOUNDS OF UNKNOWN CONSTITUTION
    • C07G1/00Lignin; Lignin derivatives
    • CCHEMISTRY; METALLURGY
    • C14SKINS; HIDES; PELTS; LEATHER
    • C14CCHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C3/00Tanning; Compositions for tanning
    • C14C3/02Chemical tanning
    • C14C3/08Chemical tanning by organic agents
    • C14C3/24Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor

Description

Verfahren zur Darstellung von chlorhaltigen Produkten aus Zellstoffabf@ Es ist beobachtet worden, daß die durch Behandeln mit gasförmigem Chlor entstandenen Derivate der in Zellstoffablaugen enthaltenen organischen Substanzen Neigung zur Salzsäureabspaltung zeigen.Process for the preparation of products containing chlorine from pulp waste @ It has been observed that those produced by treatment with gaseous chlorine Derivatives of the organic substances contained in pulp waste liquors tend to Show hydrochloric acid elimination.

Es hat sich gezeigt, daß diese Eigenschaft dadurch beseitigt wird, daß man das Chlorierungsprodukt mit Chlorat und Salzsäure behandelt.It has been shown that this property is eliminated by that the chlorination product is treated with chlorate and hydrochloric acid.

Es wurde gefunden, daß auch andere Oxydationsmittel, wie Chlorkalk und Salzsäure, Salpetersäure, Wasserstoffsuperoxyd, Ozon, Kaliumpermanganat usw. die gleiche Wirkung wie Chlorat und Salzsäure haben. Man arbeitet zweckmäßig in der Weise, daß man die Ablauge so lange mit gasförmigem Chlor unter allmählicher Steigerung der Temperatur behandelt, bis der entstehende Niederschlag kein Chlor mehr aufnimmt und läßt dann nach Abtrennung der Flüssigkeit eine weitere Behandlung mit den genannten Oxydationsmitteln folgen.It has been found that other oxidizing agents, such as chlorinated lime and hydrochloric acid, nitric acid, hydrogen peroxide, ozone, potassium permanganate, etc. have the same effect as chlorate and hydrochloric acid. One works appropriately in the way that the waste liquor for so long with gaseous chlorine under gradual Increase the temperature treated until the resulting precipitate does not contain chlorine absorbs more and then leaves a further treatment after separation of the liquid with the oxidizing agents mentioned.

Beispiel: iooo kg Dicklauge mit 700 kg Trockengehalt werden mit 5oo kg Wasser verdünnt und in der Kälte mit Chlor behandelt. Wenn die Aufnahme nachläßt, wird die Temperatur auf etwa 7o° gesteigert, bis das anfangs schleimige braune Produkt filtrierbar wird. Der Chlorgehalt ist hierbei auf etwa 23 Prozent gestiegen. Nach Abtrennen der Flüssigkeit wird der Nie- derschlag mit der gleichen Gewichtsmenge 45prozentiger Salpetersäure in der Hitze behandelt. Der durch Zusatz von Salzsäure ausgeschiedene, noch längere Zeit mit der Reaktionsflüssigkeit erwärmte Niederschlag besitzt nach dem Abkühlen- und Trocknen einen Chlorgehalt von 26,6 Prozent. Das Produkt wird hellgelb und spaltet keine Säure ab, was sich auf folgende Weise feststellen läßt Es wird in der Kälte eine iprozentige Lösung des Produktes hergestellt und durch Titration die zur vollständigen Neutralisation notwendige Menge Alkalifestgestellt. 0,5 g Produkt verbraucht hierbei 23,5 ccm 1/1o n-Natronlauge. Eine zweite Probe wird vor der Titration eine Stunde im Wasserbad auf 7o' erhitzt und nach dem Erkalten wieder. titriert. 0,5 g Produkt verbraucht hierbei 23,5 ccm 1/1a n-Natronlauge zur vollständigen Neutralisation. Eine Abspaltung von Salzsäure war also nicht eingetreten. Verwendet man dagegen zur Titration ein nicht nachbehandeltes Produkt, so verbrauchen z. B. o,5 g vor dem Erhitzen 18 ccm 1;1o n-Natronlauge, nach einstündigem Erhitzen 2o ccm l/Io n-Natronlauge. Es hat also in diesem Falle eine Salzsäureabspaltung stattgefunden.Example: 100 kg thick liquor with 700 kg dry content are diluted with 500 kg water and treated with chlorine in the cold. When the uptake ceases, the temperature is increased to about 70 ° until the initially slimy brown product can be filtered. The chlorine content has risen to around 23 percent. After separating the liquid, the precipitate is treated with the same amount by weight of 45 percent nitric acid in the heat. The precipitate separated out by the addition of hydrochloric acid and warmed up with the reaction liquid for a longer period of time has a chlorine content of 26.6 percent after cooling and drying. The product becomes light yellow and does not split off any acid, which can be determined in the following way: A 1% solution of the product is prepared in the cold and the amount of alkali necessary for complete neutralization is determined by titration. In this case, 0.5 g of product consumes 23.5 ccm of 1/10 n sodium hydroxide solution. A second sample is heated to 70 'in a water bath for one hour before the titration and again after cooling. titrated. In this case, 0.5 g of product consumes 23.5 ccm of 1/1 n sodium hydroxide solution for complete neutralization. Hydrochloric acid was therefore not split off. If, on the other hand, a non-aftertreated product is used for titration, z. B. 0.5 g before heating 18 ccm 1; 1o n-sodium hydroxide solution, after one hour heating 2o ccm 1/10 n-sodium hydroxide solution. In this case, hydrochloric acid was split off.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung von chlorhaltigen Produkten aus Zellstoffablaugen, dadurch gekennzeichnet, daß die durch Behandlung mit gasförmigem Chlor entstandenen Produkte mit anderen oxydierend wirkenden Mitteln als Chlorat und Salzsäure behandelt werden. PATENT CLAIM: Process for the preparation of chlorine-containing products from pulp waste liquors, characterized in that the products resulting from treatment with gaseous chlorine are treated with other oxidizing agents than chlorate and hydrochloric acid.
DEST34991D 1921-09-25 1921-09-25 Process for the preparation of products containing chlorine from pulp waste liquors Expired DE397604C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEST34991D DE397604C (en) 1921-09-25 1921-09-25 Process for the preparation of products containing chlorine from pulp waste liquors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST34991D DE397604C (en) 1921-09-25 1921-09-25 Process for the preparation of products containing chlorine from pulp waste liquors

Publications (1)

Publication Number Publication Date
DE397604C true DE397604C (en) 1924-06-24

Family

ID=7462206

Family Applications (1)

Application Number Title Priority Date Filing Date
DEST34991D Expired DE397604C (en) 1921-09-25 1921-09-25 Process for the preparation of products containing chlorine from pulp waste liquors

Country Status (1)

Country Link
DE (1) DE397604C (en)

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