WO2012059133A1 - Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques - Google Patents

Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques Download PDF

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Publication number
WO2012059133A1
WO2012059133A1 PCT/EP2010/066862 EP2010066862W WO2012059133A1 WO 2012059133 A1 WO2012059133 A1 WO 2012059133A1 EP 2010066862 W EP2010066862 W EP 2010066862W WO 2012059133 A1 WO2012059133 A1 WO 2012059133A1
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WO
WIPO (PCT)
Prior art keywords
ions
walls
wastewater
sodium
cations
Prior art date
Application number
PCT/EP2010/066862
Other languages
German (de)
English (en)
Inventor
Volker Paasch
Original Assignee
Voith Patent Gmbh
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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to PCT/EP2010/066862 priority Critical patent/WO2012059133A1/fr
Publication of WO2012059133A1 publication Critical patent/WO2012059133A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • 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
    • 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
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
    • C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/46115—Electrolytic cell with membranes or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4618—Supplying or removing reactants or electrolyte
    • C02F2201/46185—Recycling the cathodic or anodic feed

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • the amount of lignin dissolved in this way is considerable. It is a valuable raw material, at least for its fuel value, but also for the production of organic substances.
  • the thermal utilization of leached lignin has long been known.
  • the wastewater, also known as lye or waste liquor, also carries some of the chemicals that
  • Membranes control the flow of ions depending on their charge (cations or anions).
  • Such an ion-selective wall (diaphragm, semipermeable membrane) is only permeable to certain ions, i. H. a cation-selective wall for positive ions only and an anion-selective wall for negative ions only.
  • Cation-selective membranes can be made from sulfonated
  • polystyrene and anion-selective polystyrene membranes with quaternary amines there are bipolar membranes consisting of a combination of a cation-selective and an anion-selective layer. In an applied electric field, the water is dissociated into anions and cations and these depending on their charge in the adjacent
  • Chambers delivered. Processes with bipolar membranes can have much lower power consumption.
  • a reactor for carrying out the process usually contains a larger number of reaction chambers arranged side by side, through which the liquids flow in parallel and are separated from one another by the ion-selective walls. In order to maintain the ion flux through these walls, an electrical voltage is applied, to which surface electrodes, anode and cathode are usually attached on both sides of the reactor. The ion flux then leads to an electric current through the reactor.
  • Process is also called electrodialysis.
  • Fig.1 a scheme for explaining the method
  • 2 shows a reactor with cation-selective walls, shown in greatly simplified form
  • FIG. 3 shows a greatly simplified reactor with a combination of cation-selective and bipolar walls
  • Fig.5 a typical application of the process in pulp production.
  • Fig.1 the principle of the method is explained by way of example.
  • a reaction chamber 6 which is flowed through from bottom to top of wastewater 1 produced in the production of lignocellulosic fibers.
  • This wastewater usually contains lignosulfonates based on sodium, magnesium, calcium or ammonium.
  • the reaction chamber 6 is bounded laterally only by certain ions permeable walls 3 and 3 ' (semipermeable walls), both of which are cation selective.
  • ions permeable walls 3 and 3 ' semipermeable walls
  • the respective laterally adjacent reaction chambers 7 and 7 ' also flow liquids, which will be discussed in more detail.
  • an electric field F applied by anode 14 and cathode 15 an electric current flows transversely to the flow direction of the liquids.
  • an inflow 4 of hydrogen ions (protons) in which the wastewater 1 leading
  • a recording solution 9, z. B. sulfuric acid H 2 S0 3
  • sulfuric acid H 2 S0 3
  • the sulfuric acid transforms into Hydrogen sulfite with the corresponding base (sodium, magnesium, calcium or ammonium) to.
  • reaction with other sodium ions can also be formed with the emission of protons sulfite, which is considered to be particularly advantageous. If sodium ions are in the wastewater 1, so arises
  • Such chemicals can be used as a reducing agent for digestion, which then turn lignosulfonate compounds with sodium, magnesium, calcium or ammonium ions.
  • Fig. 2 is the receiving solution 9, here the sulfurous acid, in the reaction chamber 7, which is closer to the anode 14 than the effluent 1 leading reaction chamber 6.
  • the two reaction chambers 6 and 7 run off the desired conversion reactions, which is why the technical application mostly a "cell stack" with many such
  • this reactor shown in Fig. 2 at the anode 14 contains a
  • an electrochemical rinse solution 1 1 or 1 1 ' is circulated, which contains a salt of the cations to be separated from the effluent 1.
  • a sodium sulfur compound in this case sodium sulphate (Na 2 S0 4)
  • a semipermeable wall 3 ' has. Due to the wall 3 "on one side of the anode 14 and on the other hand, an outflow 12 of cations (here sodium ions, in other applications: magnesium, calcium or ammonium ions) to the guided in the adjacent reaction chamber 7 receiving solution 9, z.
  • sulfuric acid which in turn converts into a concentrate 10, here in sodium hydrogen sulfite (NaHS0 3 ) or as already mentioned in sulfite, eg sodium sulfite (Na 2 So 3 ).
  • Rinse solution 1 1 is chemically changed to sodium hydrogen sulfate (NaHSO 4 ) by the cation release and conveyed as rinse solution 1 1 ' hydraulically, ie without penetrating the semipermeable walls 3, 3 ' or 3 " , into a reaction chamber 8 ' provided with the cathode 15.
  • the already described flux 5 of cations eg sodium, magnesium, calcium or ammonium ions
  • the rinse cycle serves to deliver the cations from the cathode 15 to the anode 14
  • FIG. 3 an advantageous embodiment of the invention is shown, in which cation-selective walls 3 " and bipolar walls 3 "' , seen alternate in the flow direction of the electric current.
  • the anode 14 closer to the walls 3 "' of the effluent 1 leading reaction chamber 6 and 6 ' bipolar effect, so that from the water dissociated protons
  • Fig. 4 shows the combination of several same and the same operated
  • Reaction chambers 8 and 8 ' for the rinse solution 1 1 or 1 1 ' are present only once per reactor.
  • the process is typically used in pulp mills.
  • the wood raw material 19 in the digestion process 20 is chemically treated in such a way that substantially
  • lignocellulosic pulps (pulp) 22 are produced, among other things, a larger amount of wastewater 1 is obtained, on the most important

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

Le procédé sert à la récupération de produits chimiques par exemple à partir d'eaux usées (1) obtenues lors de la production de cellulose. Les eaux usées (1) sont conduites entre des parois ions-sélectives (3, 3') et sont traversées par un courant électrique entre une anode (14) et une cathode (15). Un flux (4) d'ions à absorber par les eaux usées (1) et un flux (5) d'ions libérés par les eaux usées (1) sont produits à travers les parois ions-sélectives (3, 3'). Par ce fait, des cations (par exemple les ions sodium, magnésium, calcium ou ammonium) transportés dans les eaux usées (1) peuvent être remplacés par des protons, donc des ions hydrogène, ce qui permet la récupération et la réutilisation des produits chimiques contenus dans les eaux usées (1). Le procédé peut être mis en œuvre à de basses températures et sans surpression.
PCT/EP2010/066862 2010-11-05 2010-11-05 Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques WO2012059133A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/066862 WO2012059133A1 (fr) 2010-11-05 2010-11-05 Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/066862 WO2012059133A1 (fr) 2010-11-05 2010-11-05 Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques

Publications (1)

Publication Number Publication Date
WO2012059133A1 true WO2012059133A1 (fr) 2012-05-10

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PCT/EP2010/066862 WO2012059133A1 (fr) 2010-11-05 2010-11-05 Procédé de récupération de produits chimiques à partir d'eaux usées obtenues lors de la production de matières fibreuses lignocellulosiques

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WO (1) WO2012059133A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4584057A (en) * 1985-04-22 1986-04-22 The United States Of America As Represented By The Secretary Of Agriculture Membrane processes for separation of organic acids from kraft black liquors
US4775480A (en) * 1983-10-18 1988-10-04 Gnb Incorporated Membrane processes for treatment of and recovery of components from kraft black liquors
EP0416312A2 (fr) * 1989-09-01 1991-03-13 International Business Machines Corporation Procédé pour séparer et récupérer en continu l'acide éthylène diamine tétra-acétique (EDTA) des eaux de traitement pour déposer chimiquement le cuivre
EP0916620A2 (fr) * 1997-11-12 1999-05-19 Archer-Daniels-Midland Company Dessalement d'effluents aqueux par électrodialyse au moyen de cellules chargées
US20030121787A1 (en) * 2002-01-03 2003-07-03 Reiter Robert J. Purification of onium hydroxides by electrodialysis

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4775480A (en) * 1983-10-18 1988-10-04 Gnb Incorporated Membrane processes for treatment of and recovery of components from kraft black liquors
US4584057A (en) * 1985-04-22 1986-04-22 The United States Of America As Represented By The Secretary Of Agriculture Membrane processes for separation of organic acids from kraft black liquors
EP0416312A2 (fr) * 1989-09-01 1991-03-13 International Business Machines Corporation Procédé pour séparer et récupérer en continu l'acide éthylène diamine tétra-acétique (EDTA) des eaux de traitement pour déposer chimiquement le cuivre
EP0916620A2 (fr) * 1997-11-12 1999-05-19 Archer-Daniels-Midland Company Dessalement d'effluents aqueux par électrodialyse au moyen de cellules chargées
US20030121787A1 (en) * 2002-01-03 2003-07-03 Reiter Robert J. Purification of onium hydroxides by electrodialysis

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