DE703003C - Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates - Google Patents

Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates

Info

Publication number
DE703003C
DE703003C DE1934I0054727 DEI0054727D DE703003C DE 703003 C DE703003 C DE 703003C DE 1934I0054727 DE1934I0054727 DE 1934I0054727 DE I0054727 D DEI0054727 D DE I0054727D DE 703003 C DE703003 C DE 703003C
Authority
DE
Germany
Prior art keywords
insoluble
soluble
starch
alkali
water
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
DE1934I0054727
Other languages
German (de)
Inventor
Dr Eduard Doerr
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DE1934I0054727 priority Critical patent/DE703003C/en
Application granted granted Critical
Publication of DE703003C publication Critical patent/DE703003C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B11/00Preparation of cellulose ethers
    • C08B11/16Aryl or aralkyl ethers

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 wasserunlöslichen, alkalilöslichen Aralkylderivaten der Cellulose, Stärke und ähnlicher Kohlenhydrate Das Patent 683 568 betrifft ein Verfahren zur Herstellung von wasserunlöslichen, alkali- Itislichen aralkylderivaten der Celltilose, Stärke und <ähnlicher Kohlenhydrate, welches (ladurch gekennmichnet ist, (1a13 inan auf i 11o1 des Kohlenhydrates höchstens I', :\fol _@Ikalilauge und einen Cberschu13 eines -\ralkylierungsmittels einwirken lälit. Es wurde nun gefunden, dali man einen Teil (los für diese Umsetzung erforderlichen Aralky- liertlng'smittels einsparen kann, -,Fenn man die Reaktion in Gc-enwart indifferenter Lüsungs1nittel durchführt. Es gelingt auf (liese Weise, den nach dein Verfahren (los Ilauptpatetits anzttwendenden L'berschuß an :lrall:ylierini-sinittel ganz oder teilweise durch Zugabe indifferenter Lösungsmittel ztl er- setzen. .11s solche indifferente Lösungsmittel haben sich beispielsweise Brnzin, Benzol, Toltiol, Ligroin als Igeeignet erwiescu. Man verf;ihrt ini Übrigen wie 1n1 1latilit- patent beschrieben und erhält in guter-\usbclite die wertvollen, 1n Wasser lnld organischen Lösungsmitteln unliislichcn, in .111;alilauc IC« 11 löslichen Aralkyhitlier der ix#trellunden Kohlenhydrate, z. ß. I3enz@ 1ce11u1,(sr. Beispiel 6o Teile Zellstoff werden in ;°!"i,e Natroll- lauge getaucht, abgepreßt auf i io 'feile und in einem hneter fein zerfasert. Die zerfasert Alkalicellulose wird rillt einem Gemisch von 3oo Teilen Lilgroin und 2o Teilen l'#eii7vl- chlorid ain Rückllul3ki.ihler unter Rühre11 io Stunden -mini Sieden erhitzt. Dann wird abgekühlt, von L1-roin ab-enutscht und mit Methanol, dann finit Wasser gewaschen. Die gebildete Benzvlcelltilose ist in io"/,i(#er \atronlaug #,c klar und faserfrei löslich. Process for the preparation of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates The 683,568 patent relates to a method for the production of water-insoluble, alkaline Itislichen aralkyl derivatives of Celltilose, Starch and <similar carbohydrates, which (is identified by this, (1a13 inan on i 11o1 of the carbohydrate at most I ', : \ fol _ @ Ikalilauge and an excess of one - \ ralkylating agent can act. It has now been found that one part (los Aralky- liertlng'smittel can save, - if one the reaction in Gc-enwart more indifferent Solvent carries out. It succeeds on (read way that according to your procedure (go Ilauptpatetits applied excess : lrall: ylierini-sinittel in whole or in part Partial addition of inert solvents set. .11s such inert solvents for example, petroleum, benzene, Toltiol, ligroin proved to be suitable. In the remainder such as 1n1 1latilit- patent described and received in good- \ usbclite the valuable, 1n water lnld organic Solvents are insoluble, in .111; alilauc IC «11 soluble aralkyrites of the ix #trellunds Carbohydrates, e.g. ß. I3enz @ 1ce11u1, (sr. example 6o parts of pulp are in; °! "I, e Natroll- dipped in lye, pressed on i io 'file and in a man finely frayed. The frayed Alkali cellulose is a mixture of grooves 3oo parts Lilgroin and 2o parts l '# eii7vl- chloride ain Rückllul3ki.ihler with stirring11 Heated for 10 hours -mini boiling. Then it will be cooled, sucked off by L1-roin and with Methanol, then finely washed with water. the Benzellilose formed is in io "/, i (#er \ atronlaug #, c clear and soluble without fibers.

Claims (1)

1@.\'rl:\'r:1NS1'I:UC'il:
Verfahren zur 11erstellun, 1, von w;is,er- unlüslichen, alkalilüslichen .@rall;ylderiva- ten der Celltilose, Stärke und ähnlicher Kollleilli_\'(Ir.tte, (ladurch #,el:Crlil'lelcllllet, (lal.i (ler @eni<iti Ihltent 653 568 zn vor wendende l'berschu(3 (los :lralhy@ierun;;s- mitt(#ls iiher slic: .@Ikalinien:;e ganz oder teilweise (furch in(li(It'rentr I.@istin@@smittcl ersetzt wird.
1 @. \ 'Rl: \' r: 1NS1'I: UC'il:
Procedure for creating, 1, of w; is, he insoluble, alkali-soluble. @ rall; ylderiva- ten of cell silose, starch and the like Kollleilli _ \ '(Ir.tte, (let #, el: Crlil'lelcllllet, (lal.i (ler @eni <iti Ihltent 653 568 zn before turning l'aberschu (3 (los: lralhy @ ierun ;; s- mitt (#ls iiher slic:. @ Ikalinien:; e whole or partially (furch in (li (It'rentr I. @ istin @@ smittcl is replaced.
DE1934I0054727 1934-10-25 1934-10-25 Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates Expired DE703003C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1934I0054727 DE703003C (en) 1934-10-25 1934-10-25 Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1934I0054727 DE703003C (en) 1934-10-25 1934-10-25 Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates

Publications (1)

Publication Number Publication Date
DE703003C true DE703003C (en) 1941-02-25

Family

ID=7193949

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1934I0054727 Expired DE703003C (en) 1934-10-25 1934-10-25 Process for the production of water-insoluble, alkali-soluble aralkyl derivatives of cellulose, starch and similar carbohydrates

Country Status (1)

Country Link
DE (1) DE703003C (en)

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