DE331907C - Process for the production of cellulose from wood and similar cellulose-containing materials - Google Patents

Process for the production of cellulose from wood and similar cellulose-containing materials

Info

Publication number
DE331907C
DE331907C DE1919331907D DE331907DA DE331907C DE 331907 C DE331907 C DE 331907C DE 1919331907 D DE1919331907 D DE 1919331907D DE 331907D A DE331907D A DE 331907DA DE 331907 C DE331907 C DE 331907C
Authority
DE
Germany
Prior art keywords
cellulose
wood
production
similar
pulp
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
DE1919331907D
Other languages
German (de)
Inventor
Schmidt Erich
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE331907C publication Critical patent/DE331907C/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
    • D21C3/003—Pulping cellulose-containing materials with organic compounds
    • 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
    • D21C3/18—Pulping cellulose-containing materials with halogens or halogen-generating compounds
    • 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
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment

Description

Aus der deutschen Patentschrift 76578 ist die Gewinnung von Zellstoff durch Einwirkung oxydierender Gase auf Pflanzenteile bekannt. Es wurde nun die Beobachtung gemacht, daß Chlordioxyd in Wasser, Tetrachlorkohlenstoff, Chloroform und ähnlichen Lösungsmitteln auf Holz einwirkt. Schon in der Kälte tritt eine Reaktion ein, die durch Erhitzen und gegebenenfalls durch Anwendung von Druck erheblich gesteigert werden kann. Die Zellulose bleibt von der ..Einwirkung des Chlordioxyds verschont und kann nach bekannten Verfahren, wie z. B. durch Ausziehen mit Natronlauge, gewonnen werden. The German patent 76578 describes the production of cellulose by action oxidizing gases known on parts of plants. It has now been observed that Chlorine dioxide in water, carbon tetrachloride, chloroform and similar solvents Wood acts. A reaction occurs even in the cold, which is caused by heating and possibly can be increased significantly by applying pressure. The cellulose remains spared from the effects of chlorine dioxide and can be such as B. by extracting with caustic soda can be obtained.

Das neue Verfahren zeichnet sich dadurch aus, daß der anfallende Zellstoff von einem bisher noch nicht erreichten Reinheitsgrade ist, so daß der Gehalt an Methoxyl und Pentosan sich fast an der Grenze des analytisch noch Nachweisbaren hält; deshalb ist es besonders geeignet, nach anderen Verfahren erhaltenen Zellstoff einer weitgehenden Reinigung zu unterwerfen.
Als Beispiele seien angegeben:The new process is characterized by the fact that the resulting pulp is of a degree of purity that has not yet been achieved, so that the methoxyl and pentosane content is almost at the limit of what can be analytically detected; therefore it is particularly suitable to subject pulp obtained by other processes to extensive purification.
Examples are:

i. Sägespäne werden mit einer mehrfachen Menge gesättigter, wäßriger 'Chlordioxydlösung • behandelt, abgenutscht, ausgewaschen und mit Natronlauge gekocht, darauf abermals ausgewaschen, nochmals mit gesättigter Chlordioxydlösung kurze-Zeit behandelt und dann bis zur neutralen Reaktion ausgewaschen. Der anfallende Zellstoff zeichnet sich durch besondere Reinheit aus.i. Sawdust is mixed with a multiple amount of saturated, aqueous' chlorine dioxide solution • treated, sucked off, washed out and boiled with sodium hydroxide solution, then washed out again, Treated again with saturated chlorine dioxide solution for a short time and then up to washed out neutral reaction. The resulting pulp is characterized by special Purity.

2. Technischer Sulfitzellstoff wird mit einer mehrfachen Menge wäßriger, gesättigter Chlordioxydlösung längere Zeit bei Zimmertemperatur behandelt, darauf abgenutscht, gut ausgewaschen und mit Natronlauge ausgekocht, wiederum abgenutscht und mehrmals mit Wasser ausgekocht. Die erhaltene, jetzt etwas gelblieh aussehende Masse wird nochmals mit Chlordioxydlösung behandelt und dann mit Wasser ausgekocht. Der erhaltene Zellstoff ist blendend weiß.2. Technical sulphite pulp is treated with a multiple amount of aqueous, saturated chlorine dioxide solution Treated for a long time at room temperature, then sucked off, washed well and boiled with caustic soda, sucked off again and repeatedly with water boiled out. The resulting, now somewhat yellowish-looking mass is again with chlorine dioxide solution treated and then boiled with water. The pulp obtained is dazzling white.

Claims (2)

Patent-Ansprüche :Patent Claims: 1. Verfahren zur Gewinnung von Zellstoff aus Holz und ähnlichen zellstoffhaltigen Stoffen, dadurch gekennzeichnet, daß diese in Wasser, Tetrachlorkohlenstoff, Chloroform und ähnlichen Flüssigkeiten, in denen Chlordioxyd gelöst ist, in der Kälte oder Wärme, gegebenenfalls unter Anwendung von Druck, behandelt werden, worauf das so behandelte Material mit Natronlauge gekocht wird.1. Process for the production of pulp from wood and similar pulp-containing Substances, characterized in that they are in water, carbon tetrachloride, chloroform and similar liquids, in which chlorine dioxide is dissolved, in the cold or warm, if necessary with application of pressure, whereupon the treated material with caustic soda is cooked. 2. Verfahren zum Reinigen technischer Zellstoffe nach Patentanspruch 1, dadurch gekennzeichnet, daß die Zellstoffe zunächst mit Chlordioxyd und dann mit Natronlauge behandelt werden.2. A method for cleaning technical pulps according to claim 1, characterized characterized in that the pulp is first treated with chlorine dioxide and then with caustic soda be treated.
DE1919331907D 1922-01-04 1919-12-17 Process for the production of cellulose from wood and similar cellulose-containing materials Expired DE331907C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE92287X 1922-01-04

Publications (1)

Publication Number Publication Date
DE331907C true DE331907C (en) 1921-01-14

Family

ID=5644109

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1919331907D Expired DE331907C (en) 1922-01-04 1919-12-17 Process for the production of cellulose from wood and similar cellulose-containing materials

Country Status (5)

Country Link
AT (1) AT92287B (en)
CH (1) CH99050A (en)
DE (1) DE331907C (en)
FR (1) FR546556A (en)
GB (1) GB191357A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468771A (en) * 1944-04-03 1949-05-03 Univ Minnesota Process of preparing fibers and yarns

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2491499A (en) * 1946-02-12 1949-12-20 Diamond Alkali Co Treating ligno-cellulosic materials and resulting product
US2513788A (en) * 1947-01-31 1950-07-04 Brown Co Bleaching of sulfate wood pulp
US2706673A (en) * 1951-10-19 1955-04-19 Elmer R Burling Method of bleaching with chlorine dioxide
BE518419A (en) * 1952-03-26
US2741537A (en) * 1952-03-26 1956-04-10 Olin Mathieson Available chlorine single-stage bleaching of sulfate pulp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468771A (en) * 1944-04-03 1949-05-03 Univ Minnesota Process of preparing fibers and yarns

Also Published As

Publication number Publication date
FR546556A (en) 1922-11-16
AT92287B (en) 1923-04-25
GB191357A (en) 1923-03-22
CH99050A (en) 1923-05-01

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