EP3722501A1 - Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé - Google Patents

Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé Download PDF

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Publication number
EP3722501A1
EP3722501A1 EP19168837.3A EP19168837A EP3722501A1 EP 3722501 A1 EP3722501 A1 EP 3722501A1 EP 19168837 A EP19168837 A EP 19168837A EP 3722501 A1 EP3722501 A1 EP 3722501A1
Authority
EP
European Patent Office
Prior art keywords
separation
mobile phase
hemicelluloses
feed stream
fraction
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.)
Withdrawn
Application number
EP19168837.3A
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German (de)
English (en)
Inventor
Karin Fackler
Danuta AIGNER
Richard Herchl
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
Original Assignee
Lenzing AG
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, Chemiefaser Lenzing AG filed Critical Lenzing AG
Priority to EP19168837.3A priority Critical patent/EP3722501A1/fr
Priority to PCT/EP2020/057839 priority patent/WO2020207766A1/fr
Publication of EP3722501A1 publication Critical patent/EP3722501A1/fr
Withdrawn legal-status Critical Current

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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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0042—Fractionating or concentration of spent liquors by special methods
    • D21C11/005—Treatment of liquors with ion-exchangers
    • 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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for

Definitions

  • Hemicelluloses are generally understood to mean polyoses composed of pentoses and / or hexoses, such as xylose, arabinose, glucose, mannose or galactose. Hemicelluloses refer in particular to all polysaccharides apart from cellulose, which occur as a component of plant cell walls, the matrix of which consists of fibrillar, partially crystalline cellulose, as well as low molecular weight breakdown products of these polyoses and cellulose, e.g. hydroxycarboxylic acids, which can be formed during digestion processes. In contrast to cellulose, which is a non-branched homopolymer of glucose, hemicelluloses are heteropolymers of the above-mentioned pentoses and hexoses.
  • Hemicelluloses also have significantly lower degrees of polymerisation or chain lengths than cellulose. Such hemicelluloses can be, for example, xylans, mannans, galactans, or other pentosans or hexosans.
  • a process for the recovery of sodium hydroxide solution from the press liquor obtained in a viscose process is known.
  • the press liquor which is obtained in the viscose process when alkali cellulose is pressed and is usually an aqueous alkaline solution (containing sodium hydroxide solution) contaminated with hemicelluloses, is fed as a feed stream through diffusion dialysis in order to obtain a recovered alkaline solution enriched with sodium hydroxide solution.
  • the mobile phase is understood to mean in particular all liquid or dissolved substances that are transported through the chromatographic system.
  • the mobile phase usually comprises both the substances that are dissolved in the feed stream and are introduced into the mobile phase as eluent via this, as well as those substances that are introduced into the mobile phase as mobile phase or eluent and thereby as transport medium for the dissolved substances are used.
  • a target fraction containing an alkaline solution can be recovered from the waste liquor with particularly high purity.
  • concentration of alkaline solution in the target fraction is also higher than the concentration of alkaline solution in the feed stream, a target fraction can be obtained which is also alkaline-enriched compared to the feed stream. Additional subsequent process steps for concentrating the recovered alkaline solution can thus be dispensed with, whereby a process which is simpler and more efficient in terms of process technology can be created.
  • the reliability of the method for recovering alkaline solution can be further increased if the waste liquor in the feed stream has an alkali concentration of at least 50 g / kg, preferably of at least 70 g / kg.
  • the recovered alkaline solution in the target fraction has an alkali concentration of at least 50 g / kg.
  • the selectivity and selectivity of the process can be further improved if the ion exchange resin is a cation exchange resin.
  • the stationary phase can thus reversibly bind cations from the mobile phase in the matrix and release them back to it.
  • the dissolved substances have alkaline solutions, as in the case of the present invention.
  • the cations of the alkaline solution (for example Na + ions in the case of a sodium hydroxide solution as the alkaline solution) have a high affinity to bind to the charged functional groups in the matrix of the cation exchanger, while others Substances such as hemicelluloses have a significantly lower affinity for binding to the functional groups.
  • the alkaline solution therefore has a longer retention time in the stationary phase than the hemicelluloses, which enables the formation of a separation profile with a sharp demarcation between hemicelluloses and alkaline solution in the mobile phase.
  • the reliability of the method can be further improved if a liquid solvent is supplied to the mobile phase as the mobile phase, in which the waste liquor contaminated with hemicelluloses is at least partially soluble.
  • a liquid solvent is supplied to the mobile phase as the mobile phase, in which the waste liquor contaminated with hemicelluloses is at least partially soluble.
  • Particularly preferred mobile solvents can be, for example, solvents which, on the one hand, reliably take up and transport the dissolved substances from the feed stream, and, on the other hand, allow the dissolved substances to be reliably and controlled dissolution from the stationary phase.
  • a suitable choice of solvent can also influence the retention time of the dissolved substances in the mobile phase.

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  • Polysaccharides And Polysaccharide Derivatives (AREA)
EP19168837.3A 2019-04-12 2019-04-12 Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé Withdrawn EP3722501A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19168837.3A EP3722501A1 (fr) 2019-04-12 2019-04-12 Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé
PCT/EP2020/057839 WO2020207766A1 (fr) 2019-04-12 2020-03-20 Procédé de récupération d'une solution alcaline, ainsi que procédé pour fabriquer des corps moulés cellulosiques régénérés présentant un tel procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19168837.3A EP3722501A1 (fr) 2019-04-12 2019-04-12 Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé

Publications (1)

Publication Number Publication Date
EP3722501A1 true EP3722501A1 (fr) 2020-10-14

Family

ID=66175179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19168837.3A Withdrawn EP3722501A1 (fr) 2019-04-12 2019-04-12 Procédé de récupération de solution alcaline ainsi que procédé de fabrication de corps moulé cellulosique régénéré comprenant un tel procédé

Country Status (2)

Country Link
EP (1) EP3722501A1 (fr)
WO (1) WO2020207766A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112456682B (zh) * 2020-11-25 2023-05-30 赛得利(九江)纤维有限公司 一种粘胶废水中粘胶回收工艺
CN113135965A (zh) * 2021-05-25 2021-07-20 浙江华康药业股份有限公司 一种利用木糖母液生产结晶木糖的系统及方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404063A (en) * 1964-12-28 1968-10-01 Owens Illinois Inc By-product recovery from kraft black liquor
EP0140226A2 (fr) * 1983-10-31 1985-05-08 Organocell Gesellschaft für Zellstoff- und Umwelttechnik mbH Procédé pour l'obtention de lignine à partir de solutions de lignine alcalines
WO1995029002A1 (fr) * 1994-04-21 1995-11-02 Xyrofin Oy Procede de fractionnement d'une solution
WO2000034568A1 (fr) * 1998-12-08 2000-06-15 Rhodia Acetow Gmbh Procede de preparation de pate a usage chimique a partir de copeaux de bois
US20050203291A1 (en) * 2004-03-11 2005-09-15 Rayonier Products And Financial Services Company Process for manufacturing high purity xylose
WO2010046532A1 (fr) * 2008-10-21 2010-04-29 Danisco A/S Procédé de production de xylose et de pâte pour transformation chimique
WO2011123948A1 (fr) * 2010-04-07 2011-10-13 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Environment Procédé pour le raffinage de produits chimiques provenant d'eaux résiduaires d'usine de pâtes et de papiers
CN103349908A (zh) 2013-07-24 2013-10-16 宜宾海丝特纤维有限责任公司 一种扩散渗析回收粘胶纤维生产中压榨碱液的方法
WO2013164234A1 (fr) * 2012-05-03 2013-11-07 Annikki Gmbh Procédé de production de cellulose à faible teneur en lignine à partir d'un matériau lignocellulosique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404063A (en) * 1964-12-28 1968-10-01 Owens Illinois Inc By-product recovery from kraft black liquor
EP0140226A2 (fr) * 1983-10-31 1985-05-08 Organocell Gesellschaft für Zellstoff- und Umwelttechnik mbH Procédé pour l'obtention de lignine à partir de solutions de lignine alcalines
WO1995029002A1 (fr) * 1994-04-21 1995-11-02 Xyrofin Oy Procede de fractionnement d'une solution
WO2000034568A1 (fr) * 1998-12-08 2000-06-15 Rhodia Acetow Gmbh Procede de preparation de pate a usage chimique a partir de copeaux de bois
US20050203291A1 (en) * 2004-03-11 2005-09-15 Rayonier Products And Financial Services Company Process for manufacturing high purity xylose
WO2010046532A1 (fr) * 2008-10-21 2010-04-29 Danisco A/S Procédé de production de xylose et de pâte pour transformation chimique
WO2011123948A1 (fr) * 2010-04-07 2011-10-13 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Environment Procédé pour le raffinage de produits chimiques provenant d'eaux résiduaires d'usine de pâtes et de papiers
WO2013164234A1 (fr) * 2012-05-03 2013-11-07 Annikki Gmbh Procédé de production de cellulose à faible teneur en lignine à partir d'un matériau lignocellulosique
CN103349908A (zh) 2013-07-24 2013-10-16 宜宾海丝特纤维有限责任公司 一种扩散渗析回收粘胶纤维生产中压榨碱液的方法

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