DE323936C - Process for breaking down wood and other cellulosic substances with the help of chlorine - Google Patents
Process for breaking down wood and other cellulosic substances with the help of chlorineInfo
- Publication number
- DE323936C DE323936C DE1919323936D DE323936DD DE323936C DE 323936 C DE323936 C DE 323936C DE 1919323936 D DE1919323936 D DE 1919323936D DE 323936D D DE323936D D DE 323936DD DE 323936 C DE323936 C DE 323936C
- Authority
- DE
- Germany
- Prior art keywords
- chlorine
- help
- breaking down
- wood
- cellulosic substances
- 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
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
- D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
-
- 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
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
Verfahren zum Aufschließen von Holz und anderen zellulosehaltigen Stoffen mit Hilfe von Chlor. Durch eine Reihe von Untersuchungen von Croß und Bevan und anderen ist bekanntgeworden, daß die Ligninsubstanzen des Holzes mit Chlor reagieren und danach durch verdünntes Alkali von dem Zellstoff abgetrennt werden können. Diese wissenschaftliche Erkenntnis konnte jedoch durch die Technik nicht ausgenutzt werden, weil beim Behandeln von größeren Holzmengen mit Chlor ein gleichmäßig verlaufender Aufschluß nicht zu erzielen war.Process for digesting wood and other cellulosic Substances with the help of chlorine. Through a series of studies by Croß and Bevan and others have learned that the lignin substances in wood react with chlorine and thereafter separated from the pulp by dilute alkali. These However, scientific knowledge could not be exploited by technology, because when treating larger amounts of wood with chlorine, it runs evenly Information could not be obtained.
Es wurde nun gefunden, daß es vorteilhaft ist, die Chlorierung in einem indifferenten Mittel, wie Kohlenstofftetrachlorid, Äthylendichlorid, Trichloräthan und anderen, vorzunehmen, insbesondere ist Kohlenstofftetrachlorid wegen seines hohen Lösevermögens für Chlor besonders geeignet. Die Einwirkung des Chlors kann durch Wärme, Druck und Chlorüberträgen, wie Jod, Eisenchlorid und andere, beschleunigt werden. -Die nach der Chlorbehandlung durch Isolierung nach bekannten Methoden, wie Ausziehen mit Natronlauge, gewonnene Zellulose stellt ein besonders reines Produkt dar, weil sie während des Chlorierungsprozesses in dem indifferenten Lösungsmittel keinen oxydierenden oder hydrolysierenden Einflüssen ausgesetzt war..It has now been found that it is advantageous to use the chlorination in an inert agent such as carbon tetrachloride, ethylene dichloride, trichloroethane and others, especially carbon tetrachloride is because of its particularly suitable for chlorine with its high dissolving power. The effect of chlorine can accelerated by heat, pressure and chlorine transfers such as iodine, ferric chloride and others will. -The after chlorine treatment by isolation according to known methods, cellulose obtained like stripping with caustic soda is a particularly pure product because they are in the inert solvent during the chlorination process was not exposed to oxidizing or hydrolyzing influences ..
Beispiel. roo g Holzbrocken werden in 3oo ccm Tetrachlorkohlenstoff mit Unterbrechungen so lange mit Chlorgas behandelt, bis ein Überschuß an Chlor nicht mehr verschwindet. Hierauf wird der Tetrachlorkohlenstoff abgesaugt und das chlorierte Holz dreimal mit zweiprozentiger wäßriger Natronlauge ausgezogen. Ausbeute 5o bis 55 Prozent.Example. roo g of wood chunks are in 300 cc carbon tetrachloride treated intermittently with chlorine gas until there is an excess of chlorine no longer disappears. Then the carbon tetrachloride is sucked off and that chlorinated wood extracted three times with two percent aqueous sodium hydroxide solution. yield 5o to 55 percent.
Durch Zusatz von o,= Prozent Jod oder durch Eindrücken des Chlors, sowie durch vorsichtiges Erwärmen kann die Einwirkungszeit des Chlors um mehr als die Hälfte vermindert werden.By adding o, = percent iodine or by pressing in the chlorine, as well as careful heating, the exposure time of the chlorine can be increased by more than can be reduced by half.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE323936T | 1919-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE323936C true DE323936C (en) | 1920-08-11 |
Family
ID=6176487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1919323936D Expired DE323936C (en) | 1919-09-18 | 1919-09-18 | Process for breaking down wood and other cellulosic substances with the help of chlorine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE323936C (en) |
Cited By (1)
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 |
-
1919
- 1919-09-18 DE DE1919323936D patent/DE323936C/en not_active Expired
Cited By (1)
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 |
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