WO2012125057A1 - Procédé de traitement de matériau fibreux - Google Patents

Procédé de traitement de matériau fibreux Download PDF

Info

Publication number
WO2012125057A1
WO2012125057A1 PCT/RU2011/000165 RU2011000165W WO2012125057A1 WO 2012125057 A1 WO2012125057 A1 WO 2012125057A1 RU 2011000165 W RU2011000165 W RU 2011000165W WO 2012125057 A1 WO2012125057 A1 WO 2012125057A1
Authority
WO
WIPO (PCT)
Prior art keywords
processing
fibrous material
electrohydraulic
electro
cellulose
Prior art date
Application number
PCT/RU2011/000165
Other languages
English (en)
Russian (ru)
Inventor
Владимир Владимирович МАКСИМОВ
Original Assignee
Maksimov Vladimir Vladimirovich
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 Maksimov Vladimir Vladimirovich filed Critical Maksimov Vladimir Vladimirovich
Priority to PCT/RU2011/000165 priority Critical patent/WO2012125057A1/fr
Publication of WO2012125057A1 publication Critical patent/WO2012125057A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • 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
    • D21C1/10—Physical methods for facilitating impregnation

Definitions

  • the method relates to the technology of manufacturing cellulose and can be used, in particular, in the pulp and paper industry both for the production of cellulosic raw materials and for the modification of the finished pulp raw materials.
  • alkaline cooking treatment of plant materials with a dilute solution of caustic soda under pressure, followed by bleaching — treatment with oxidizing agents, for example sodium hypochlorite), used mainly for cotton cellulose
  • oxidizing agents for example sodium hypochlorite
  • sulfite cooking pressure treatment with aqueous solutions of calcium, magnesium, sodium or ammonium bisulfite containing a small amount of free S0 2
  • sulfate cooking pressure treatment with an aqueous solution of a mixture of caustic soda and sodium sulfide
  • Cellulose is isolated from straw by the chlor-alkali method (sequential treatment with an aqueous solution of caustic soda and chlorine) (see Rogovin Z.A., Chemistry of cellulose, M., 1972).
  • the disadvantages of this method are its low manufacturability, due to the length of the processing process to obtain the required quality of the final product and low environmental friendliness due to contamination of the liquid medium by the products of the electropulse treatment of sulfate liquor.
  • the technical result that is achieved by the implementation of the claimed invention is to increase the manufacturability of the processing of fibrous material by reducing the time to obtain the final product with desired characteristics.
  • the high-temperature processing operation is performed separately from the operation of electrical exposure, and electrohydraulic is used as the latter treatment.
  • the electro-hydraulic treatment can be carried out in a liquid medium with a hydrogen index (pH) in the range from 6 to 9, depending on the specific value of which the optimal value of the electro-hydraulic shock power is determined.
  • electro-hydraulic processing can be additionally carried out before the operation of high-temperature processing of the fibrous material.
  • the method may further include a refinement operation, wherein the electro-hydraulic treatment is carried out after each of the possible operations of the method, and the electro-hydraulic treatment may additionally be carried out before the high-temperature processing of the fibrous material.
  • the method of processing fibrous material may further include a refinement and washing operation, wherein electro-hydraulic processing is carried out after each of the possible operations of the method, and electro-hydraulic processing may additionally be carried out before the high-temperature processing of the fibrous material.
  • the main feature of the new method for processing fibrous materials is that, along with the separation of the treated fiber from by-products (pectin, lignin) - cellulose satellite substances, the fibrous complexes are crushed and shortened by creating a nonequilibrium state of the system: the product being processed is the external environment, which created by using various physical and mechanical effects.
  • the inventive method for processing fibrous material is based on the idea of using the morphological features of the processed raw materials, which are known to consist of elementary fibers, united in a dense compact complex by middle plates, consisting of lignin and pectin substances, the so-called inlaid substances, acting as a natural adhesive component.
  • the elementary fibers are shifted in length so that the ends of the fibers located above wedge between those fibers that are lower, forming a grid.
  • Elementary fibers are characterized by high strength and flexibility, and inlaid substances that combine elementary fibers into a single whole, have low strength and high rigidity.
  • Such a structure of fibers consisting of two components having diametrically opposed physical and mechanical properties and combined into a single whole, is classified as a composite material.
  • a composite material is a structure in which two components can be distinguished: a reinforcing frame, a reinforcing composite material throughout the volume, and a matrix into which the reinforcing frame is immersed.
  • the most common natural composite material is wood, in which the role of the reinforcing cage is played by chains of cellulose (elementary fibers), and the role of the matrix is played by encrusting substances (mainly pectins and lignin).
  • the basis of the claimed method is the idea of using various physical and mechanical properties of the components of the composite material: matrix and reinforcing frame.
  • the matrix and the reinforcing frame perform various functions, and, as a result, have different physical and mechanical parameters. So, the matrix is characterized by high rigidity and low strength, while the reinforcing frame has elasticity and flexibility, as well as great strength. You can verify the truth of what has been said by comparing the physicomechanical parameters of elementary fibers (reinforcing cage) and middle plates (matrix). And although these two components are combined into one, their properties remain different.
  • a pulsed electric discharge is used in a liquid medium with a hydrogen pH of 6 to 9, in particular in an aqueous medium.
  • energy is rapidly released in the discharge channel.
  • the pressure in the discharge channel significantly exceeds the external one, the channel expands rapidly, which leads to the appearance of a shock wave and fluid flows.
  • the electrical conductivity of water depends on a number of factors, among which the most significant are temperature, pH, ionic composition, and ion concentration.
  • a shock wave is a jump in the density of a medium propagating from a channel at a speed greater than sonic.
  • the pressure at the front of a shock wave in a fluid can reach tens of kilobars.
  • the impact of this pressure on the processed object can cause structural adjustment of the material of the object (crushing of brittle materials, deformation, surface hardening, etc.).
  • Fluid flows propagating at a speed of 10 -40 m / s transfer kinetic energy to the processed object, causing, like the shock wave, its mechanical changes.
  • the fibers are split in the longitudinal direction into the finest fibrils - fibrils.
  • the outer surface of the fibers sharply increases (due to unfolding), the OH hydroxyl groups released during grinding are exposed, which leads to a sharp increase in the role of the phenomena occurring on this surface.
  • the so-called hydration is enhanced, i.e. adsorption of water molecules by —OH groups due to the formation of hydrogen bonds.
  • the fibers become more flexible and plastic, and this provides better contact between them during the subsequent process of casting the paper sheet and, therefore, creates more durable interfiber bonds, which ultimately increases the strength of the paper.
  • the claimed method may include a different sequence of actions. But in any case, the process of obtaining cellulose will include at least a single cooking of the feedstock (hydrolysis) with one or another chemical reagent and at least one operation of electrical exposure.
  • Hydrolysis according to the claimed invention can be carried out by various cooking methods: alkaline (both by the sodium method, in which sodium hydroxide is used as a reagent, and sulfate, in which a solution containing sodium hydroxide and sodium sulfide, called white liquor) is used as the reagent) and acid ( a sulfite method in which aqueous solutions of calcium, magnesium, sodium or ammonium bisulfite containing a small amount of free S0 2 ) are used as reagents.
  • alkaline both by the sodium method, in which sodium hydroxide is used as a reagent, and sulfate, in which a solution containing sodium hydroxide and sodium sulfide, called white liquor
  • acid a sulfite method in which aqueous solutions of calcium, magnesium, sodium or ammonium bisulfite containing a small amount of free S0 2 ) are used as reagents.
  • the soda method is used in the production of cellulose from deciduous wood and annual plants, in particular for the production of cotton cellulose
  • the sulfate method is suitable for the production of cellulose from any type of plant material
  • the sulfite method is suitable for the production of cellulose from non-resinous wood species: spruce, fir.
  • unbleached cellulose is obtained, which has not only a relatively low whiteness, but also contains a significant amount of impurities accompanying the fiber
  • the cellulose obtained after hydrolysis is washed and subjected to electrical exposure, which is carried out in a liquid medium with a hydrogen index (pH) in the range from 6 to 9 by electro-hydraulic processing.
  • the claimed method consists in a single cooking, for example, cooking chips by the sulfate method in boilers of batch or continuous operation at a temperature of 165-175 ° C and a pressure of 0, 7— 1.0 MPa, followed by electro-hydraulic treatment.
  • electro-hydraulic processing of raw materials is carried out before and after a single cooking.
  • the method includes cooking, subsequent dressing and washing, while electro-hydraulic processing is carried out after each of the operations, and if necessary, additionally before cooking.
  • the dimensions and geometry of the discharge chamber, the electrical parameters of the pulse current generator, the frequency of the pulses, the length and geometry of the interelectrode space, the number of electrodes and the gap between them, the ratio of the mass of liquid to the mass of raw materials and other parameters are selected so as to create optimal efforts development of spark breakdown and shock wave configuration for efficient splitting and modification of various feedstock and the best performance of the installation as a whole.
  • the claimed method can be implemented using known devices used in industry, for example, in the manufacture of paper.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

L'invention se rapporte aux techniques de fabrication de cellulose, et peut être notamment utilisée dans l'industrie papetière-cellulosique afin de produire une matière première à base de cellulose, et afin de modifier une matière première à base de cellulose obtenue. Le procédé de traitement de matériau fibreux comprend au moins une opération consistant à traiter à haute température un matériau fibreux dans un milieu liquide et appliquer une action électrique, l'opération de traitement haute température étant distincte de l'opération d'action électrique, cette dernière consistant en un traitement hydroélectrique. Le traitement hydroélectrique se fait dans un milieu liquide ayant un indice d'hydrogène (pH) de 6 à 9, et en fonction de la valeur concrète de celui-ci, on détermine la valeur optimale de la puissance du choc hydroélectrique. Le procédé de traitement de matériau fibreux par traitement hydroélectrique peut en outre se faire avant l'opération de traitement haute température du matériau fibreux. Le procédé de traitement de matériau fibreux peut en outre comprend une opération de traitement alcalin, et le traitement hydroélectrique se fait après chacune des opérations possibles du procédé. Le traitement hydroélectrique peut également se faire avant l'opération de traitement haute température du matériau fibreux. Le procédé de traitement de matériau fibreux peut en outre comprendre une opération de traitement alcalin et de rinçage, et le traitement hydroélectrique se fait après chacune des opérations possibles du procédé. Le traitement hydroélectrique peut également se faire avant l'opération de traitement haute température du matériau fibreux.
PCT/RU2011/000165 2011-03-17 2011-03-17 Procédé de traitement de matériau fibreux WO2012125057A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/RU2011/000165 WO2012125057A1 (fr) 2011-03-17 2011-03-17 Procédé de traitement de matériau fibreux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/RU2011/000165 WO2012125057A1 (fr) 2011-03-17 2011-03-17 Procédé de traitement de matériau fibreux

Publications (1)

Publication Number Publication Date
WO2012125057A1 true WO2012125057A1 (fr) 2012-09-20

Family

ID=46830944

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/RU2011/000165 WO2012125057A1 (fr) 2011-03-17 2011-03-17 Procédé de traitement de matériau fibreux

Country Status (1)

Country Link
WO (1) WO2012125057A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU169390A1 (ru) * Способ получения облагороженной хлопковой— и древесной целлюлозы
WO1996035013A1 (fr) * 1995-05-03 1996-11-07 Sven Siegle Procede de production de pulpe d'un materiau cellulosique, pulpe obtenue et son utilisation
RU2145986C1 (ru) * 1998-08-25 2000-02-27 Иоссель Юрий Яковлевич Способ изготовления целлюлозы
RU2216616C1 (ru) * 2002-09-18 2003-11-20 Симонов Сергей Вадимович Способ электроимпульсной обработки волокнистых материалов

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU169390A1 (ru) * Способ получения облагороженной хлопковой— и древесной целлюлозы
WO1996035013A1 (fr) * 1995-05-03 1996-11-07 Sven Siegle Procede de production de pulpe d'un materiau cellulosique, pulpe obtenue et son utilisation
RU2145986C1 (ru) * 1998-08-25 2000-02-27 Иоссель Юрий Яковлевич Способ изготовления целлюлозы
RU2216616C1 (ru) * 2002-09-18 2003-11-20 Симонов Сергей Вадимович Способ электроимпульсной обработки волокнистых материалов

Similar Documents

Publication Publication Date Title
Kumar et al. Cellulose based grafted biosorbents-Journey from lignocellulose biomass to toxic metal ions sorption applications-A review
JP4586066B2 (ja) 竹を利用するパルプの製造方法及びこの方法を使用して製造されたパルプ
KR20150073195A (ko) 셀룰로오스 나노 파이버
JPH0670315B2 (ja) 強化酸化抽出法
KR20120098994A (ko) 마이크로피브릴화 셀룰로오스 생산 공정 및 상기 공정을 이용하여 생산된 마이크로피브릴화 셀룰로오스
CN115151692B (zh) 改性烷基磺酸及其用途
JP2023515047A (ja) 硫酸組成物およびその使用
WO2016024880A1 (fr) Procédé de traitement de matériaux de type chanvre
EP0112377A1 (fr) Decoloration a l'ozone de materiaux cellulosiques.
RU2736428C1 (ru) Способ получения волокнистого полуфабриката из мискантуса
EP2097582A1 (fr) Procédé de fabrication d'une pulpe mécanique
Hanafiah et al. Extraction and characterization of microfibrillated and nanofibrillated cellulose from office paper waste
WO2012125057A1 (fr) Procédé de traitement de matériau fibreux
CN102373638B (zh) 油棕榈efb纤维生物酶法高得率清洁制浆方法
FI125891B (en) Process for the treatment of cellulose and alkali solutions obtained from the treatment of cellulose
CN110747681A (zh) 一种基于离子液体的纸浆漂白保护剂
Zeinaly et al. Improving the bleaching process of hardwood chemi-mechanical pulp
Danielewicz et al. Pulping and bleaching OCC. Part II. Oxygen delignification and bleaching
EP0239583B1 (fr) Procede de pre-traitement d'une pulpe avec des stabilisateurs et du peroxyde avant le raffinage mecanique
KR101602121B1 (ko) 리그노셀룰로오스 섬유 다발 물질의 화학적 처리, 및 그것과 관련된 방법 및 시스템
JPH0217675B2 (fr)
JP4275936B2 (ja) 機械パルプの製造方法
RU2216616C1 (ru) Способ электроимпульсной обработки волокнистых материалов
Chang et al. Pilot-scale investigation into the effects of alkaline peroxide pre-treatments on low-consistency refining of primary refined softwood TMP
WO2012125058A1 (fr) Procédé de modification de cellulose способ модификации целлюлозы

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11860723

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11860723

Country of ref document: EP

Kind code of ref document: A1