DE372296C - Process for cleaning and altering the physical nature of cellulose - Google Patents

Process for cleaning and altering the physical nature of cellulose

Info

Publication number
DE372296C
DE372296C DESCH57649D DESC057649D DE372296C DE 372296 C DE372296 C DE 372296C DE SCH57649 D DESCH57649 D DE SCH57649D DE SC057649 D DESC057649 D DE SC057649D DE 372296 C DE372296 C DE 372296C
Authority
DE
Germany
Prior art keywords
cleaning
altering
cellulose
acids
physical nature
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
DESCH57649D
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
Priority to DESCH55955D priority Critical patent/DE369606C/en
Priority claimed from DESCH55955D external-priority patent/DE369606C/en
Application filed by CARL G SCHWALBE DR filed Critical CARL G SCHWALBE DR
Priority to DESCH57649D priority patent/DE372296C/en
Priority to DESCH57744D priority patent/DE379268C/en
Application granted granted Critical
Publication of DE372296C publication Critical patent/DE372296C/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching

Description

Verfahren zur Reinigung und Veränderung der physikalischen Beschaffenheit von Zellstoffen. Zusatz zum Patent 3696o6. Nach dem Verfahren der Patente 3696o6 und 371507 kann durch eine Behandlung mit alkalischen Erden eine Reinigung der Zellstoffe von beigemengten Inkrusten, Hydrozellulosen, Dextrinen u. dgl. bewerkstelligt werden.Process for cleaning up and changing physical properties of pulps. Addendum to patent 3696o6. Following the procedure of patents 3696o6 and 371507 can clean the pulp by treating it with alkaline earths by admixed incrustations, hydrocelluloses, dextrins and the like.

Es wurde nun gefunden, daß man die Wirkung dieser Reinigung mittels alkalischer Erden noch größer machen kann, wenn man dieser Reinigung eine gemäßigte Hydrolyse mit Säuren vorausgehen läßt. Als solche Säuren kommen sowohl Mineralsäuren sowie auch organische Säuren, beispielsweise Schwefelsäure, Salzsäure, schweflige Säure, Milchsäure, Oxalsäure u. a., dagegen nicht oxydierende Säuren, wie salpetrige Säure, unterchlorige Säure, in Betracht. Durch diese Säuren werden die Inkrusten teilweise hydrolysiert und dadurch der Wirkung der alkalischen Erden oder der Magnesia zugänglich gemacht. Die Einwirkung der Säuren kann bei den verschiedensten Temperaturen, gegebenenfalls auch unter Druck, in sehr verschiedener Konzentration erfolgen.It has now been found that the effect of this cleaning by means of Alkaline soils can make them even greater if this purification is a moderate one Can precede hydrolysis with acids. Such acids include both mineral acids as well as organic acids, for example sulfuric acid, hydrochloric acid, sulphurous Acid, lactic acid, oxalic acid and others, but non-oxidizing acids such as nitrous Acid, hypochlorous acid. These acids remove the incrustations partially hydrolyzed and thereby the effect of alkaline earths or magnesia made accessible. The action of the acids can take place at a wide variety of temperatures, possibly also under pressure, in very different concentrations.

Je nach dem Verwendungszweck muß die Behandlung- mit Säuren in schwächerem oder stärkerem Maße erfolgen; sie darf bei der Verwendung von Zellstoffen für Kunstseiden und Nitrierzellulosen bis zu einer Verringerung der Faserfestigkeit getrieben werden, während eine solche begreiflicherweise bei der Verwendung für papiertechnische Zwecke vermieden werden muß.Depending on the intended use, the treatment with acids must be weaker or to a greater extent; it is allowed to use pulp for rayon and nitriding celluloses are driven to a reduction in fiber strength, while such an understandable when used for paper technology purposes must be avoided.

Beispiel. Sulfitzellstoff wird mit o,5prozentiger Schwefelsäure drei Stunden lang bei z Atmosphären Druck gedämpft, hierauf 8 Stunden mit überschüssigem Kalk gekocht.Example. Sulphite pulp becomes three with 0.5 percent sulfuric acid Steamed for hours at z atmospheric pressure, then 8 hours with excess Lime boiled.

Claims (1)

PATENT-ANSPRUcIL: Verfahren zur Reinigung und Veränderung der physikalischen Beschaffenheit von Zellstoffen nach den Patenten 3696o6 und 371507, dadurch gekennzeichnet, daß man der Behandlung mit alkalischen Erden, Magnesia u. dgl. eine Behandlung mit anorganischen oder organischen Säuren, mit Ausschluß oxydierend wirkender Säuren, vorausgehen läßt.PATENT CLAIM: Process for cleaning and changing the physical Quality of pulp according to patents 3696o6 and 371507, characterized in that, that the treatment with alkaline earths, magnesia and the like. A treatment with inorganic or organic acids, with the exclusion of oxidizing acids, lets go ahead.
DESCH57649D 1919-08-19 1920-02-29 Process for cleaning and altering the physical nature of cellulose Expired DE372296C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DESCH55955D DE369606C (en) 1919-08-19 1919-08-19 Process for cleaning and altering the physical nature of cellulose
DESCH57649D DE372296C (en) 1919-08-19 1920-02-29 Process for cleaning and altering the physical nature of cellulose
DESCH57744D DE379268C (en) 1919-08-19 1920-03-10 Process for cleaning and altering the physical nature of cellulose

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DESCH55955D DE369606C (en) 1919-08-19 1919-08-19 Process for cleaning and altering the physical nature of cellulose
DESCH57649D DE372296C (en) 1919-08-19 1920-02-29 Process for cleaning and altering the physical nature of cellulose

Publications (1)

Publication Number Publication Date
DE372296C true DE372296C (en) 1923-03-26

Family

ID=32963393

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH57649D Expired DE372296C (en) 1919-08-19 1920-02-29 Process for cleaning and altering the physical nature of cellulose

Country Status (1)

Country Link
DE (1) DE372296C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969601C (en) * 1942-11-18 1958-06-19 Phrix Werke Ag Process for the production of a low-ash pulp from annual plants suitable for chemical processing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE969601C (en) * 1942-11-18 1958-06-19 Phrix Werke Ag Process for the production of a low-ash pulp from annual plants suitable for chemical processing

Similar Documents

Publication Publication Date Title
DE549460C (en) Process for the production of aqueous, low-electrolyte solutions of silk fibroin
DE372296C (en) Process for cleaning and altering the physical nature of cellulose
DE719721C (en) Process for the production of glass fibers of great fineness
DE512927C (en) Process for the digestion of vegetable fibers with chloric acid
DE379268C (en) Process for cleaning and altering the physical nature of cellulose
DE336535C (en) Process for the production of the purest cellulose with a cotton or wool-like texture from vegetables using acidic sulphite liquors
DE356752C (en) Process for opening up cob reed (Typha), rushes, willow bark and the like Like plants
DE533647C (en) Process for the production of cellulose from vegetable fibers using chlorine
AT133481B (en) Process for the production of pliable rayon.
DE371507C (en) Process for cleaning and altering the physical nature of cellulose
DE562181C (en) Process for obtaining purified cellulose
DE405059C (en) Process for obtaining a cellulose material that is particularly suitable for use in the chemical industry and for the production of special papers
DE972448C (en) Process for the aftertreatment of cellulose material
DE748725C (en) Process for opening up deforested bast fibers
AT136368B (en) Process for obtaining raw textile fibers from plant stems.
DE710822C (en) Process for the production of pulp
DE664103C (en) Process for the digestion of vegetable fibers
AT124684B (en) Process for the production of viscose silk.
AT87719B (en) Process for the production of woolen goods with increased durability.
DE363378C (en) Process for refining spinnable fibers
AT75483B (en) Process for the treatment of wood for the purpose of producing a wood pulp with good matting properties.
DE407334C (en) Process for opening up, bleaching and refining all kinds of plant fibers and obtaining pure white cellulose, especially for the paper and textile industry
DE454361C (en) Process for the production of patterned weaving effects on a fabric
DE334528C (en) Process for the production of woolen and synthetic woolen goods with increased durability
DE590326C (en) Process for the production of vulcanized fiber