DE363175C - Process for the production of solutions from cellulose or cellulose-containing substances - Google Patents

Process for the production of solutions from cellulose or cellulose-containing substances

Info

Publication number
DE363175C
DE363175C DEZ9954D DEZ0009954D DE363175C DE 363175 C DE363175 C DE 363175C DE Z9954 D DEZ9954 D DE Z9954D DE Z0009954 D DEZ0009954 D DE Z0009954D DE 363175 C DE363175 C DE 363175C
Authority
DE
Germany
Prior art keywords
cellulose
solutions
production
containing substances
percent
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
DEZ9954D
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.)
Zellsloff Fabrik Waldhof AG
Original Assignee
Zellsloff Fabrik Waldhof AG
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 Zellsloff Fabrik Waldhof AG filed Critical Zellsloff Fabrik Waldhof AG
Priority to DEZ9954D priority Critical patent/DE363175C/en
Application granted granted Critical
Publication of DE363175C publication Critical patent/DE363175C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00—Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • C08B1/003—Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Description

Verfahren zur Herstellung von Lösungen aus Zellulose oder zellulosehaltigen Stoffen. In der Patentschrift 3o6818 ist ein Ver- fahren zur Herstellung von Lös(unigen aus Zel- lulose oder zcllwlo@sehaltiigen Stoffen beschrie- ben., bei welchem als Lösungsmittel ein. Ge- misch, von Salzsäure und Schwefelsäure ver- iverndet wind, welches weniger als 39 Prozent Chlorwaisiserstbff enthält. Die verschiedenen Zelluloiselstoffe verhalten sich idiesem Lösungs- gemisch gegenüber versichieden. Besionders wenn man große Mengen Schwefelsäure in der Lösung vermeiden will und dementspre- chend mit dem Chlorwasserstoffgehalt nicht erheblich unter 39 Prozent heruntergeht, sind zwar aufs möglichst reiner Zejgul(ys,e noch gute Lösungen zu erhalten. Die weniger reinen Zellulosep:rädukte des Handels ergeben aber leicht Lösung n., bei welchen noch ein (wenn auch meist nur sehr geringer) Teil ungelöst zurückbleibt. Weitere Versuche haben nun ergeben., xlaß das Zelnulosamateria@l sich schneller unld voll- kommener in dem Sa)lzsäure-Scliwefelisäure- Gemisch auflöst, wenn :man es vorher einer Behandlung mit Aämfien unterwirft. Das Verfahren kann beispIelsweise folgen- dermaßen ausgeführt werden: Ein Tcil grob- zerlaleinerter Sulfitzelilstoffpappe wird mit fünf Teilen etwa Mrozenüiger Natron-länge durchknefet, nach etwa hallbstünldigem Stehen mit Wasiser verdünnt und die alkalische Flüs- sigkeit mit,d-en diarin gelösten Verunreinigun- gen durch Abpresisen., Absahlewdern o.dgl. von der Zellulose getrennt. Der Zelllluloserückstainld wind dann mit Wasser gewaschen bis zum Verschwinlden ider alkalischen Reaktion. Zweckmäßig läßt man dann noch einige Wa- schungen mit angäsäuertean Wasser folgen und wäsrih.t die Säure wieder mit reinere Was- ser aufs. Das so gereinigte ZelluQ!osernaterial wird nun getrocknet unid döst sich dann leicht in einem Salzsäure-Schiwiefelisäure-Gemisch auf, welches z. B. 35 Prozent Chlorwasserstoff neben -etwa so bis 1z Prozent Schwefelsäure enthält. Process for the production of solutions from cellulose or substances containing cellulose. In the patent 3o6818 is a ver drive for the production of loos (unigen from cell lulose or zcllwlo @ containing substances are described ben., in which a solvent. Ge mixed, of hydrochloric acid and sulfuric acid wind, which is less than 39 percent Chlorwaisiserstbff contains. The different Cellulose substances behave in this solution mixed opposite to different. Besionders if you have large amounts of sulfuric acid in want to avoid the solution and accordingly with the hydrogen chloride content not goes down well below 39 percent to be sure to the purest possible Zejgul (ys, e still good Get solutions. The less pure Zellulosep: but products of the trade result easy solution n., for which a (if also usually only very small) Part unsolved remains behind. Further experiments have now shown the cellulosamateria @ oil fills up faster and come in the hydrochloric acid-sulphuric acid Mixture dissolves if: one does it beforehand Subjects to treatment with Aämfien. The procedure can be, for example, as follows: be carried out in such a way: one part roughly shredded sulphite fibreboard is supplied with five parts about Mrozenüiger the length of baking soda knefet, after standing for about resounding diluted with wasiser and the alkaline liquid the presence of the impurities dissolved in it gen by Abpresisen., Absahlewdern or the like. from the cellulose separated. The cellulose residue wind then washed with water until Disappear in the alkaline reaction. It is then expedient to leave a few more wa- Follow with acidified water and washes the acid again with purer water ser on. The cellular material purified in this way is now dried and then doze easily in a hydrochloric acid-schiwiefelic acid mixture on what z. B. 35 percent hydrogen chloride in addition to about 1z percent sulfuric acid contains.

Claims (1)

PATENTANSPRUCH: Abänderung des Verfahrens zur Her- ste:llung von, Lösungen aus Zellulose oder zeldüllosehaltigen Stoffen nach Patent 3o6818, dädurch gekennzeichnet, daß das Zellulosernateniail, einer alkaliisdhen, Vor- behaiidilung unterworfen wirrt.
PATENT CLAIM: Modification of the procedure for production of, solutions from cellulose or cellulosic substances according to patent 3o6818, characterized by the fact that the Zellulosernateniail, an alkaliisdhen, pre Behaiidilung confused.
DEZ9954D 1917-04-01 1917-04-01 Process for the production of solutions from cellulose or cellulose-containing substances Expired DE363175C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEZ9954D DE363175C (en) 1917-04-01 1917-04-01 Process for the production of solutions from cellulose or cellulose-containing substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEZ9954D DE363175C (en) 1917-04-01 1917-04-01 Process for the production of solutions from cellulose or cellulose-containing substances

Publications (1)

Publication Number Publication Date
DE363175C true DE363175C (en) 1922-11-04

Family

ID=7621133

Family Applications (1)

Application Number Title Priority Date Filing Date
DEZ9954D Expired DE363175C (en) 1917-04-01 1917-04-01 Process for the production of solutions from cellulose or cellulose-containing substances

Country Status (1)

Country Link
DE (1) DE363175C (en)

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