DE391713C - Method for breaking up straw, reeds and the like like - Google Patents

Method for breaking up straw, reeds and the like like

Info

Publication number
DE391713C
DE391713C DEK84253D DEK0084253D DE391713C DE 391713 C DE391713 C DE 391713C DE K84253 D DEK84253 D DE K84253D DE K0084253 D DEK0084253 D DE K0084253D DE 391713 C DE391713 C DE 391713C
Authority
DE
Germany
Prior art keywords
reeds
straw
breaking
nitric acid
soda solution
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
DEK84253D
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.)
PAUL KRAIS DR
Original Assignee
PAUL KRAIS 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 PAUL KRAIS DR filed Critical PAUL KRAIS DR
Priority to DEK84253D priority Critical patent/DE391713C/en
Priority to DEK85844D priority patent/DE395191C/en
Priority claimed from DEK85844D external-priority patent/DE395191C/en
Priority to DEK87012D priority patent/DE395192C/en
Priority claimed from DEK87012D external-priority patent/DE395192C/en
Application granted granted Critical
Publication of DE391713C publication Critical patent/DE391713C/en
Priority to DEK88841D priority patent/DE464240C/en
Priority to FR593250D priority patent/FR593250A/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/16—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides nitrogen oxides; nitric acid nitrates, nitrites

Description

Die Gewinnung von Zellstoff aus Holz mit Hilfe von Salpetersäure ohne Druckkochung ist an sich bekannt. Gemäß der Erfindung soll Stroh, Schilf u. dgl. ebenfalls ohne Druck in der Weise aufgeschlossen werden, daß man mit konzentrierten Salpeterlösungen arbeitet, welche freie Salpetersäure enthalten, die man entweder zusetzt oder z. B. durch Zusatz von Schwefelsäure freimacht. Solche Lösungen, dieThe extraction of pulp from wood with the help of nitric acid is without pressure cooking known per se. According to the invention, straw, reeds and the like should also be placed in without pressure be unlocked in such a way that one works with concentrated saltpetre solutions, which contain free nitric acid, which is either added or z. B. by adding Sulfuric acid. Such solutions that

to einen Siedepunkt von etwa 107 ° C haben, sind imstande, Flachsstroh, Schilf, Pampasgräser u. dgl. in einem drei- bis vierstündigen Koch Vorgang so weit aufzuschließen, daß man durch Nachbehandlung mit heißer verdünnter Sodalösung oder einem anderen alkalischen oder erdalkalischen Mittel (Trona, Kalkwasser) die Inkrusten und sonstigen Nebenbestandteüe leicht herauslosen kann, wonach die Masse sich ohne Schwierigkeit mechanisch zerkleinern undto have a boiling point of about 107 ° C, are able to clean flax straw, reeds, pampas grass and the like in a three to four hour period Cooking process so far open up that you can dilute by post-treatment with hotter Soda solution or another alkaline or alkaline earth agent (Trona, lime water) the incrustations and other ancillary components can easily be drawn out, after which the mass can crush mechanically without difficulty and

ao weiterverarbeiten läßt.ao can be processed further.

Die von der Salpeterkochung abfallende Lauge läßt sich, entsprechend verstärkt und ergänzt, wieder verwenden. Dünnere Ablaugen können als Düngemittel dienen.The lye that falls off from the saltpeter boil can, accordingly, be strengthened and added, reuse. Thinner waste liquors can serve as fertilizer.

Beispiel I.Example I.

1000 kg Flachsstroh werden, am besten in1000 kg of flax straw, preferably in

gehäckseltem Zustand, mit heißem' Wasser übergössen, einige Zeit stehengelassen, dann wird das überschüssige Wasser abgelassen, so daß das Gesamtgewicht etwa 4 000 kg beträgt. Dazu gibt man 3 0001 Wasser und 3 000 kg Salpeter, ferner 100 kg Schwefelsäure und kocht 3 bis 4 Stunden. Hierauf wird die Lauge abgegossen, nachgespült und der Rückstand zweimal mit je 3 000 1 iprozentiger Sodalösung gekocht und gespült. Die Masse läßt sich nun z. B. im Holländer leicht zu einem gleichmäßigen Papierbrei verarbeiten. Um ein reines Weiß zu erzielen, wird die Maise z. B. in der Weise gebleicht, daß man sie zwischen der ersten und zweiten Chlorkalkbehandlung mit verdünnter heißer Sodalösung behandelt.chopped condition, with hot 'water poured over, left to stand for a while, then the excess water is drained off, like this that the total weight is about 4,000 kg. Add 3,000 liters of water and 3,000 kg Saltpeter, further 100 kg sulfuric acid and boils 3 to 4 hours. The lye is then poured off, rinsed and the residue twice Boiled and rinsed with 3,000 1 percent soda solution. The mass can now z. B. easily process in the Dutch to a uniform paper pulp. To a pure To achieve white, the corn z. B. bleached in such a way that they are between the first and second chlorinated lime treatment treated with dilute hot soda solution.

Beispiel II. ^5 Example II. ^ 5

1000 kg Schilf werden wie in Beispiel I behandelt. Soll der Zellstoff gebleicht werden, so ist es vorteilhaft, die Auskochungen mit etwa iprozentiger Sodalösung mehrmals zu wiederholen, bis die ablaufende Brühe nur noch schwach gefärbt ist.1000 kg of reeds are treated as in Example I. If the pulp is to be bleached, it is advantageous to use the decoctions Repeat about 1 percent soda solution several times until the broth just runs off is faintly colored.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zum Aufschließen von Stroh, Schilf u. dgl. mit Hilfe von Salpetersäure ohne Druckkochung, dadurch gekennzeichnet, daß man den Rohstoff im zerkleinerten Zustand mit konzentrierter Salpeterlösung kocht, die freie Salpetersäure enthält.Method for breaking up straw, reeds and the like with the aid of nitric acid without pressure cooking, characterized in that the raw material is crushed Boiling condition with concentrated nitric acid solution that contains free nitric acid.
DEK84253D 1922-12-12 1922-12-12 Method for breaking up straw, reeds and the like like Expired DE391713C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DEK84253D DE391713C (en) 1922-12-12 1922-12-12 Method for breaking up straw, reeds and the like like
DEK85844D DE395191C (en) 1922-12-12 1923-05-06 Method for breaking up straw, reeds and the like Like. With the help of nitric acid without pressure cooking
DEK87012D DE395192C (en) 1922-12-12 1923-08-26 Process for breaking up wood in the form of chips with nitric acid
DEK88841D DE464240C (en) 1922-12-12 1924-03-16 Process for the production of pulp from wood
FR593250D FR593250A (en) 1922-12-12 1925-02-13 Process for preparing cellulose

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEK84253D DE391713C (en) 1922-12-12 1922-12-12 Method for breaking up straw, reeds and the like like
DEK85844D DE395191C (en) 1922-12-12 1923-05-06 Method for breaking up straw, reeds and the like Like. With the help of nitric acid without pressure cooking
DEK87012D DE395192C (en) 1922-12-12 1923-08-26 Process for breaking up wood in the form of chips with nitric acid
DEK88841D DE464240C (en) 1922-12-12 1924-03-16 Process for the production of pulp from wood

Publications (1)

Publication Number Publication Date
DE391713C true DE391713C (en) 1924-03-11

Family

ID=32966548

Family Applications (2)

Application Number Title Priority Date Filing Date
DEK84253D Expired DE391713C (en) 1922-12-12 1922-12-12 Method for breaking up straw, reeds and the like like
DEK88841D Expired DE464240C (en) 1922-12-12 1924-03-16 Process for the production of pulp from wood

Family Applications After (1)

Application Number Title Priority Date Filing Date
DEK88841D Expired DE464240C (en) 1922-12-12 1924-03-16 Process for the production of pulp from wood

Country Status (1)

Country Link
DE (2) DE391713C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739005C (en) * 1936-11-24 1943-09-08 Robert Funck Process for the production of pulp
DE2526084A1 (en) * 1974-06-11 1976-01-02 Canadian Ind PROCESS FOR BLEACHING LIGNOCELLULOSE MATERIAL

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739005C (en) * 1936-11-24 1943-09-08 Robert Funck Process for the production of pulp
DE2526084A1 (en) * 1974-06-11 1976-01-02 Canadian Ind PROCESS FOR BLEACHING LIGNOCELLULOSE MATERIAL

Also Published As

Publication number Publication date
DE464240C (en) 1928-08-10

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