ES2097021T3 - Procedimiento de produccion de viscosa. - Google Patents

Procedimiento de produccion de viscosa.

Info

Publication number
ES2097021T3
ES2097021T3 ES94900624T ES94900624T ES2097021T3 ES 2097021 T3 ES2097021 T3 ES 2097021T3 ES 94900624 T ES94900624 T ES 94900624T ES 94900624 T ES94900624 T ES 94900624T ES 2097021 T3 ES2097021 T3 ES 2097021T3
Authority
ES
Spain
Prior art keywords
bleach
cellulose
temperature
digestor
hsl
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 - Lifetime
Application number
ES94900624T
Other languages
English (en)
Inventor
Wolfgang Wizani
Andreas Krotscheck
Johann Schuster
Karl Lackner
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.)
Lenzing AG
Primetals Technologies Austria GmbH
Original Assignee
Lenzing AG
Voest Alpine Industrienlagenbau GmbH
Chemiefaser Lenzing 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 Lenzing AG, Voest Alpine Industrienlagenbau GmbH, Chemiefaser Lenzing AG filed Critical Lenzing AG
Application granted granted Critical
Publication of ES2097021T3 publication Critical patent/ES2097021T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/02—Pretreatment of the finely-divided materials before digesting with water or steam

Abstract

LA PRESENTE INVENCION SE REFIERE A UN PROCESO PARA LA ELABORACION DE MATERIALES CELULARES VISCOSOS A BASE DE LIGNOCELULOSAS COMO MADERAS DE ARBOLES DE HOJA CADUCA, ARBOLES DE CONIFERA O PLANTAS ANUALES. LA LIGNOCELULOSA ES PRIMERO PROCESADA EN UN AUTOCLAVE DIGESTOR CON VAPOR SATURADO A FIN DE ORIGINAR LA HIDROLISIS PRELIMINAR DE HEMICELULOSAS, ENTONCES ES PROCESADO SIN RELAJACION CON LEJIA (HSL) NEGRA CALIENTE A PARTIR DE UN PROCESO PREVIO DE DIGESTION DE CELULOSA-SULFATO, SI SE REQUIERE CON LA ADMISION DE MEZCLA DE LEJIA (WL) BLANCA FRESCA A FIN DE NEUTRALIZAR LOS PRODUCTOS DE REACCION ACIDA RESULTANTE, DE TAL MODO QUE SE FORMA UNA LEJIA (NL) DE NEUTRALIZACION EN EL DIGESTOR. DESPUES DE LA CANTIDAD REQUERIDA DE ALCALI PARA LA DELIGNIFICACION SE AÑADE LEJIA (WL) BLANCA FRESCA, SI SE REQUIERE ACOMPAÑADA MEDIANTE LA EXPULSION DE LEJIA (NL) DE NEUTRALIZACION Y REGULACION DE TEMPERATURA, REALIZANDOSE LA DIGESTION CON O SIN UN GRADIENTE DE TEMPERATURA. CUANDO EL GRADO DESEADO DE DISGREGACION HASIDO ALCANZADO, SE PARA LA DIGESTION MEDIANTE EXPULSION DE LEJIA (HSL) BLANCA CALIENTE CON FILTRADO (WF) DE LAVADO ALCALINO, DE FORMA QUE LA CELULOSA QUEDA AL MISMO TIEMPO LIBRE A PARTIR DE LOS PRODUCTOS DE DESCOMPOSICION DE LIGNINA AUN ADHERIDOS, Y LA CELULOSA ASI OBTENIDA SE DESCARGA A PARTIR DEL DIGESTOR A UNA TEMPERATURA POR DEBAJO DE 100
ES94900624T 1992-12-02 1993-12-02 Procedimiento de produccion de viscosa. Expired - Lifetime ES2097021T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0238292A AT398588B (de) 1992-12-02 1992-12-02 Verfahren zur herstellung von viskosezellstoffen

Publications (1)

Publication Number Publication Date
ES2097021T3 true ES2097021T3 (es) 1997-03-16

Family

ID=3533355

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94900624T Expired - Lifetime ES2097021T3 (es) 1992-12-02 1993-12-02 Procedimiento de produccion de viscosa.

Country Status (12)

Country Link
US (1) US5676795A (es)
EP (1) EP0672207B1 (es)
JP (1) JPH08503744A (es)
CN (1) CN1041645C (es)
AT (1) AT398588B (es)
BR (1) BR9307589A (es)
CA (1) CA2150381C (es)
DE (1) DE59304443D1 (es)
ES (1) ES2097021T3 (es)
FI (1) FI952509A (es)
RU (1) RU2122055C1 (es)
WO (1) WO1994012719A1 (es)

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SE541646C2 (en) * 2017-07-04 2019-11-19 Valmet Oy Method for operating a continuous vertical reactor comprising a prehydrolysis zone and the reactor design as such
EP3673110A4 (en) * 2017-08-25 2021-05-12 Valmet AB IMPROVED COMPACT PROCESS FOR THE PRODUCTION OF A PRE-HYDROLYZED PASTE
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CN109505178B (zh) * 2018-11-21 2021-08-17 湖南骏泰新材料科技有限责任公司 一种农林三剩物制备纤维素的蒸煮方法
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Also Published As

Publication number Publication date
EP0672207A1 (de) 1995-09-20
ATA238292A (de) 1994-05-15
US5676795A (en) 1997-10-14
DE59304443D1 (de) 1996-12-12
RU95113599A (ru) 1997-05-27
AT398588B (de) 1994-12-27
EP0672207B1 (de) 1996-11-06
CA2150381A1 (en) 1994-06-09
FI952509A0 (fi) 1995-05-23
FI952509A (fi) 1995-05-23
CA2150381C (en) 2004-11-02
JPH08503744A (ja) 1996-04-23
CN1041645C (zh) 1999-01-13
BR9307589A (pt) 1999-08-31
WO1994012719A1 (de) 1994-06-09
RU2122055C1 (ru) 1998-11-20
CN1094108A (zh) 1994-10-26

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