DE522730C - Process for the desilification of alkaline cellulose waste liquors containing silica - Google Patents

Process for the desilification of alkaline cellulose waste liquors containing silica

Info

Publication number
DE522730C
DE522730C DESCH88869D DESC088869D DE522730C DE 522730 C DE522730 C DE 522730C DE SCH88869 D DESCH88869 D DE SCH88869D DE SC088869 D DESC088869 D DE SC088869D DE 522730 C DE522730 C DE 522730C
Authority
DE
Germany
Prior art keywords
silica
desilification
waste liquors
containing silica
liquors containing
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
DESCH88869D
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.)
CARL G SCHWALBE DR
Original Assignee
CARL G SCHWALBE DR
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 CARL G SCHWALBE DR filed Critical CARL G SCHWALBE DR
Priority to DESCH88869D priority Critical patent/DE522730C/en
Application granted granted Critical
Publication of DE522730C publication Critical patent/DE522730C/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye

Landscapes

  • Silicon Compounds (AREA)
  • Paper (AREA)

Description

Verfahren zur Entkieselung alkalischer kieselsäurehaltiger Zellstoffablaugen Bei der Aufarbeitung alkalischer kieselsäurehaltiger Zellstoffablaugen bereitet die Gegenwart der Kieselsäure erhebliche Schwierigkeiten bei der Wiedergewinnung des Alkalis. Durch die Gegenwart der Kieselsäure ist die Eindampfung derartiger Laugen ur Trockne und dte Überführung in eine Schmelze außerordentlich erschwert. Die Gegenwart der Kieselsäure in der Schmelze stört die Kaustifizierung der Schmelzsoda.Process for the desilification of alkaline silicic acid-containing pulp waste liquors Prepared in the processing of alkaline, silicic acid-containing cellulose waste liquors the presence of the silica causes considerable difficulties in recovery of the alkali. The presence of the silica makes the evaporation more similar Alkalis ur dryness and the transfer into a melt extremely difficult. The presence of the silica in the melt interferes with the causticizing of the molten soda.

Es wurde nun gefunden, daß man diese Kieselsäure beseitigen kann durch Einleiten von Kohlendioxyd in die Schwarzlauge. Die Kieselsäure fällt als gallertige Masse aus. Jedoch gelingt es, durch mehrstündiges Kochen oder durch ein kurzes Erhitzen unter Druck die gallertige Masse in eine gut filtrierbare kristallinische Masse überzuführen. 2 ,-,ach Abscheidung der Kieselsäure bereitet die Eindampfung der Lauge, ihre Verschmelzung zur Soda und die Kaustifizierung dieser keinerlei Schwierigke:tten mehr.It has now been found that this silica can be eliminated by Introduction of carbon dioxide into the black liquor. The silica falls as gelatinous Mass off. However, it can be achieved by boiling it for several hours or by heating it for a short time under pressure the gelatinous mass into an easily filterable crystalline mass convict. 2, -, after deposition of the silica prepares the evaporation of the Lye, its fusion to soda and the causticizing of these no difficulties whatsoever more.

Es ist zwar bekannt, in Schwarzlaugen Kohlensäure einzuleiten, um organische Stoffe zu fällen. Jedoch handelt es sich hierbei um die Schwarzlaugen, welche bei der Herstel-Jung von Holzzellstoff nach dem alkalischen "erfahren entstehen. Die Schwarzlaugen.It is known to introduce carbonic acid into black liquors in order to to precipitate organic matter. However, these are the black liquors, which at the Manufacture Jung of wood pulp after the alkaline "experience" arise. The black liquor.

welche aus Holz gewonnen werden; enthalten Kieselsäure nur in Spuren, während die Schwarzlaugen, welche aus den Stroharten, Bambus, Schilt usw. gewönnen werden, sehr kieselsäurereich sind. Es war nicht vorauszusehen, daß beim Einleiten von Kohlensäure in solchen Laugen die Kieselsäure ausgefällt wird, während die organischen Stoffe in Lösung bleiben. Bei dem Einleiten von Kieselsäure in die Schwarzlaugen der \atronzellstoffabrikation werden die organischen Stoffe ausgefällt.which are obtained from wood; contain only traces of silica, while the black liquor, which grows out of the straw, bamboo, schilt, etc. are very rich in silica. It was not foreseeable that when it was introduced of carbonic acid in such alkalis, the silicic acid is precipitated, while the organic Substances remain in solution. When introducing silica into the black liquor The organic substances are precipitated during the \ atron cellulose production.

Claims (1)

PATENTANSPRUCH: Verfahren zur Entkieselung alkalischer kieselsäurehaltiger Zellstoffablaugen bei der Verarbeitung von Gräsern, insbesondere Stroh, Bambus, Schilf usw., dadurch gekennzeichnet, daß man in die Schwarzlauge Kohlendioxyd einleitet und die entstehende gallertige Kieselsäure durch Kochen bzw. durch Erhitzen unter Druck in filtrierbare kristallinische Masse überführt und diese von der Lauge trennt.PATENT CLAIM: Process for removing silica from alkaline silicic acid Pulp waste when processing grasses, especially straw, bamboo, Reeds, etc., characterized in that carbon dioxide is introduced into the black liquor and the resulting gelatinous silica by boiling or heating under Pressure transferred into filterable crystalline mass and this separates from the liquor.
DESCH88869D 1929-01-01 1929-01-01 Process for the desilification of alkaline cellulose waste liquors containing silica Expired DE522730C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH88869D DE522730C (en) 1929-01-01 1929-01-01 Process for the desilification of alkaline cellulose waste liquors containing silica

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH88869D DE522730C (en) 1929-01-01 1929-01-01 Process for the desilification of alkaline cellulose waste liquors containing silica

Publications (1)

Publication Number Publication Date
DE522730C true DE522730C (en) 1931-04-14

Family

ID=7444021

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH88869D Expired DE522730C (en) 1929-01-01 1929-01-01 Process for the desilification of alkaline cellulose waste liquors containing silica

Country Status (1)

Country Link
DE (1) DE522730C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1046465B (en) * 1956-06-18 1958-12-11 Escher Wyss Gmbh Process for the removal of silica from alkaline pulp waste liquors
DE1119645B (en) * 1957-01-31 1961-12-14 Escher Wyss Gmbh Process for removing silicic acid from alkaline waste liquors in the pulp industry
FR2399503A1 (en) * 1977-08-04 1979-03-02 Torras Hostench Sa Continuous treatment with carbon di:oxide of residual lyes - resulting from the treatment of wood or straw

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1046465B (en) * 1956-06-18 1958-12-11 Escher Wyss Gmbh Process for the removal of silica from alkaline pulp waste liquors
DE1119645B (en) * 1957-01-31 1961-12-14 Escher Wyss Gmbh Process for removing silicic acid from alkaline waste liquors in the pulp industry
FR2399503A1 (en) * 1977-08-04 1979-03-02 Torras Hostench Sa Continuous treatment with carbon di:oxide of residual lyes - resulting from the treatment of wood or straw

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