WO2014199101A1 - Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium - Google Patents
Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium Download PDFInfo
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- WO2014199101A1 WO2014199101A1 PCT/FR2014/051460 FR2014051460W WO2014199101A1 WO 2014199101 A1 WO2014199101 A1 WO 2014199101A1 FR 2014051460 W FR2014051460 W FR 2014051460W WO 2014199101 A1 WO2014199101 A1 WO 2014199101A1
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- Prior art keywords
- treatment
- advantageously
- ozone
- magnesium
- alkaline extraction
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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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/005—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives organic 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/086—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with organic compounds or compositions comprising organic 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1073—Bleaching ; Apparatus therefor with O3
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
Definitions
- the invention relates to the treatment of chemical papermaking pulps, in particular to the bleaching of chemical pulps, in particular kraft, soda or sulphite pulps.
- chemical papermaking pulps in particular to the bleaching of chemical pulps, in particular kraft, soda or sulphite pulps.
- Mg 2+ magnesium
- chemical paper pulp or chemical pulp are obtained after cooking the wood with reagents removing most of the lignin, such as sodium hydroxide possibly catalyzed by quinones (soda process to obtain the pasta soda), the combined sodium hydroxide sodium sulphide (kraft process for obtaining kraft pulps) or bisulphites (sulphite process to obtain sulphite pulps).
- reagents such as sodium hydroxide possibly catalyzed by quinones (soda process to obtain the pasta soda), the combined sodium hydroxide sodium sulphide (kraft process for obtaining kraft pulps) or bisulphites (sulphite process to obtain sulphite pulps).
- a first phase called delignification or pre-bleaching consists of removing about half of the lignin present in the pulp.
- This operation conventionally carried out by chemical oxygen treatment (O), is inherently accompanied by a whitening of the dough, due to the brown lignin depletion.
- O chemical oxygen treatment
- the next phase consists in completely eliminating the residual lignin, so as to keep only the fraction "carbohydrates" (cellulose and hemicelluloses) perfectly white.
- This treatment is based on the oxidation of the phenolic rings present in the lignin which, once converted into hydrophilic -COOH groups, can be removed by washing in solution, advantageously in an alkaline medium, which increases their solubilization.
- the bleaching of chemical pulps is carried out by means of a succession of treatments, called the bleaching sequence, using one or more oxidants, the most common of which are chlorine dioxide or C10 2 (treatment denoted D). oxygen or O 2 (treatment noted O), and oxygenated water or hydrogen peroxide or H 2 O 2 (treatment noted P).
- a complete conventional bleaching process may be composed for example of the sequence OODE (or Eo or Ep or Eop) DP, in which:
- D is a stage of oxidation by chlorine dioxide in an acidic medium
- E is an extraction treatment for oxidized products in the presence of sodium hydroxide, the variants of which may consist in adding oxygen (Eo) and / or hydrogen peroxide (Ep) in small amounts; and
- P is a treatment with hydrogen peroxide in an alkaline medium.
- Ozone treatment noted Z
- Ozone is a very promising oxidizing agent in this context in that its effectiveness in delignification surpasses that of chlorine dioxide, with the same amount of reagent applied.
- ozone Like chlorine dioxide (D), ozone works in an acidic environment. Thus and in the same way as for chlorine dioxide delignification, the delignification by ozone must be associated with an alkaline extraction (E) to be more complete.
- E alkaline extraction
- the ozone delignification process is generally denoted ZE, indicating that the oxidation by ozone in an acidic medium is followed by an alkaline extraction, advantageously in the presence of sodium hydroxide. It should be noted that these two steps can be separated by washing, generally carried out with water, which contributes to increasing the reaction pH. In the absence of washing, the treatment is then noted [ZE].
- OOZEP type bleaching sequences for example, for a complete replacement of chlorinated reagents, or OOZDEP, for example, for a partial replacement of chlorine dioxide.
- the present invention is therefore part of the search for technical solutions for preventing or reducing the depolymerization of cellulose pulps chemical pulp observed during their treatment with the ZE sequence.
- the present invention is based on the observation by the inventors that the degradation of cellulose in this context is certainly initiated during the treatment with ozone but is amplified in alkaline medium.
- the present invention provides a concrete technical solution, namely carrying out the alkaline extraction in the presence of specific ions, in this case magnesium (Mg 2+ ) cations, advantageously at a suitable concentration.
- specific ions in this case magnesium (Mg 2+ ) cations, advantageously at a suitable concentration.
- alkaline solution for example sodium hydroxide
- the magnesium ions are added to the pulp before the addition of the alkaline solution to the pulp, i.e. at a time when the pH of the pulp is alkaline, that is to say when the reaction medium has an acidic pH (pH less than 7) or even neutral (pH less than or equal to 7).
- the magnesium ions are added between the step of treating the ozone paste and the alkaline extraction step.
- the present invention relates to a method of treating chemical papermaking pulp comprising treating the ozone pulp followed by alkaline extraction, wherein the alkaline extraction is carried out in the presence of magnesium ions (Mg 2+ ) .
- treatment process can also be understood as “bleaching process”.
- the process according to the invention is particularly suitable for the treatment of chemical papermaking pastes such as, for example, soda pastes, kraft pastes or sulphite pastes, advantageously kraft or sulphite pastes.
- chemical papermaking pastes such as, for example, soda pastes, kraft pastes or sulphite pastes, advantageously kraft or sulphite pastes.
- the chemical papermaking pulps which are intended to be treated using the process according to the invention, are hardwood and resinous wood pulps, as well as the pasta of annual plants.
- the process according to the invention is defined by at least two specific steps, namely an ozonation phase and an alkaline extraction phase, advantageously with sodium hydroxide, the alkaline extraction phase being subsequent to the ozonation phase.
- the ozonation phase is directly followed by the alkaline extraction phase.
- the method according to the invention comprises the sequence [ZE].
- the ozonation phase and the alkaline extraction phase can be separated by a washing, advantageously carried out with water, resulting for example from the washing carried out after the subsequent complementary bleaching steps, the washing against the current being common practice in whitening pasta.
- the method according to the invention comprises the ZE sequence.
- the magnesium ions are added between the washing and the alkaline extraction step.
- another treatment step may be inserted between the ozonation and alkaline extraction phases, for example a chlorine dioxide treatment (D), optionally followed by a washing.
- the method according to the invention then comprises the ZDE sequence.
- a stage of treatment of heavy metals carried out at an acidic pH and in the presence of complexing agents such as EDTA, is not interposed between the ozonation phase and the alkaline extraction phase.
- complexing agents such as EDTA
- the treatment according to the invention has a more complex sequence, with treatments upstream and / or downstream of these at least two phases.
- the bleaching of chemical pulps begins with an oxygen treatment (O), or even a double treatment with oxygen (00).
- This treatment is advantageously carried out in an alkaline medium, under oxygen gas pressure, at a temperature in the region of 100 ° C. It removes about half of the lignin from the pasta and causes pre-bleaching of the pasta.
- the two specific steps of the process according to the invention are advantageously carried out on a so-called pre-bleached pulp, treated with O or OO.
- the ZE sequence according to the invention is advantageously used on a paste having:
- the whiteness level is determined according to ISO 3688-197; and or a kappa index less than or equal to 15, advantageously less than or equal to 10. These values are to be compared to the kappa index of unbleached pasta which is generally between 20 and 30.
- the standard used for the kappa index is the ISO 302-1981.
- the bleaching process may further comprise, upstream or downstream of the ZE sequence targeted by the invention, one or more of the following treatments, in a suitable sequence and implemented under the conditions known to the man of the invention. art:
- a mineral acid advantageously sulfuric acid
- the ZE sequence referred to in the invention is advantageously integrated in a more complex process, for example OOAZEP, OOAPZE, OOAZDEP, OOZEDD ...
- the beneficial effect of the magnesium ions on the depolymerization of the cellulose is observed irrespective of the positioning of the ZE sequence, and therefore regardless of the initial bleaching state of the pulp treated.
- the purpose of the present invention is to propose a process for bleaching chemical pulps comprising an ozonation phase followed by an alkaline extraction phase, preferably with sodium hydroxide, ZE, which is less degrading for cellulose. . It has been unexpectedly shown that when the E phase is carried out in the presence of small amounts of magnesium cations, the ZE process results in pastes whose degree of polymerization of the cellulose is increased significantly.
- the dough can undergo a hot acid treatment as described above, with the aim of at least partially removing the hexenuronic acids which constitute an annoying impurity in the pasta Hardwood kraft chemicals, as they consume bleaching reagents and impair whiteness stability of the dough.
- the paste is advantageously washed to remove the products of degradation of hexenuronic acids.
- acidic pH advantageously between 2 and 4, or optionally between 2 and 10, advantageously between 4 and 8 when the ozonation is carried out at the end of bleaching treatment;
- a temperature of between 0 and 100 ° C. advantageously between 20 and 60 ° C., for example 25 ° C., or optionally between 60 ° C. and 80 ° C., when the ozonation is carried out at the end of the bleaching treatment;
- ozone in the presence of an amount of ozone of between 0.05 and 2% by weight of ozone relative to the dry pulp, advantageously between 0.1 and 1%, for example 0.6%>; during the time necessary for the addition and consumption of ozone, typically a few minutes, for example from 1 min to 2h.
- alkaline extraction it is by definition at basic pH (greater than 7), in the presence of a base.
- a base is a strong base, even more preferably soda or sodium hydroxide (NaOH). Soda can be accompanied by another base of the same strength, such as sodium sulphide. This latter possibility may be advantageous in a kraft plant since the cooking reagent is a mixture of sodium hydroxide and sodium sulphide.
- an amount of base advantageously sodium hydroxide, between 0.1 and 5% by weight relative to the dry pulp, preferably between 0.5 and 2%.
- the amount of base is that necessary to reach an alkaline pH. In fact, this quantity is greater when there is no washing before the alkaline extraction.
- the pH must be greater than 7, advantageously greater than 10, even more advantageously between 11 and 12;
- magnesium salt any compound capable of releasing Mg ++ cations, such as, for example, magnesium sulfate (MgSO 4 ), magnesium carbonate (MgCOs), magnesium hydroxide (Mg (OH) 2 ), magnesium oxide (MgO or magnesia), magnesium gluconate (Ci 2 H 22 MgOi 4 ). Mixtures of these salts can be used.
- the amount of magnesium ions (Mg 2+ ) relative to the dry weight of the dough is controlled. It is advantageously:
- the term "low amounts of magnesium ions" a mass proportion advantageously between 0.01 and 0.5%, even more advantageously between 0.02 and 0.1%.
- the alkalinity of the E stage is advantageously related to the presence of the strong base, advantageously NaOH, which implies Mg ++ cations constitute an additive added in a small amount.
- these magnesium ions are added to the paste in the form of magnesium salts, advantageously by dissolving its salts in an aqueous solution, optionally water, having an acidic or neutral pH.
- a solution can be prepared extemporaneously and added to the dough.
- a solution in particular an ozone solution, a washing solution or a chlorine dioxide solution, the magnesium salt may be added directly to said solution.
- magnesium salts are stabilizing agents of hydrogen peroxide.
- the alkaline extraction step takes place in the presence of magnesium ions but in the absence of oxygen and / or hydrogen peroxide.
- the alkaline extraction according to the invention is linked to the passage to an alkaline pH and not to the action of an oxidizing agent, in particular oxygen and / or hydrogen peroxide.
- the alkaline extraction is carried out in the presence of magnesium ions, advantageously a magnesium salt, but also in the presence of a strong alkaline agent, advantageously sodium hydroxide (NaOH) or a mixture of soda and sodium sulphide.
- a strong alkaline agent advantageously sodium hydroxide (NaOH) or a mixture of soda and sodium sulphide.
- the magnesium ions advantageously in the form of magnesium salts, are present in small amounts, preferably in a mass proportion of greater than or equal to 0.01%, or even greater than or equal to 0.02% and less than or equal to 0.5%>, or even less than or equal to 0.1%, incompatible with an alkaline agent function.
- the dough can undergo other bleaching stages allowing it to achieve the purity and whiteness required, including advantageously employing hydrogen peroxide. It is also possible to repeat the specific ZE sequence of the invention, the method then comprising, for example, the ZEZE or [ZE] [ZE] sequence. Magnesium cations are advantageously present in each of the extraction phases E of such a process. To ensure this, it is preferable to introduce each time according to the procedure described above, for example for the first phase E and then for the second phase E in the case of two stages ZE according to the invention.
- the advantage of the invention lies in the fact that the ZE process, in its various embodiments according to the invention, leads to a pulp whose cellulose is less depolymerized than after an unmodified ZE process (in the absence of magnesium ions).
- the degree of polymerization of the cellulose is for example measured by viscometry according to the ISO standard No. 5351/1-1981.
- the object of a ZE process applied to a chemical pulp is to reduce its residual lignin content, which is responsible for its coloration, and therefore to increase its whiteness. It is important to note that the ZE process according to the invention makes it possible, with equal performance of delignification and increase of whiteness, to obtain a paste of better degree of polymerization than after an unmodified ZE process.
- the present invention relates to a paper pulp obtainable by means of the method according to the invention.
- This is characterized in particular by a degree of polymerization greater than that of a paste obtained by means of an otherwise similar process, but in which the alkaline extraction step (E) is carried out in the absence of magnesium ions.
- a eucalyptus kraft pulp is treated by two successive stages with oxygen (OO) so as to obtain a pre-bleached paste having the following characteristics:
- the degree of polymerization of the cellulose is measured by viscometry according to ISO standard No. 5351/1-1981.
- ozone (Z) with a high consistency (40%) at 25 ° C, with a quantity of ozone corresponding to 0.6%> of the weight of the pulp counted in dryness at pH 2.5 during the time necessary for the introduction of the ozone (which reacts instantly), approximately 3 minutes.
- the paste is thoroughly washed with pure water and then treated with sodium hydroxide (E) at 10% consistency, with a quantity of sodium hydroxide of 2% relative to the paste, at 70 ° C. for 1 hour. .
- the pH of the dough is then greater than 11.
- the dough has the following characteristics:
- Example 2 The same sequence as that described in Example 1 is repeated, but this time by adding 0.3% by weight of MgSC 7H 2 O (ie approximately 0.03% of Mg) relative to the weight of dough counted in dry, after washing and before the addition of soda, that is to say at a time when the pH of the dough is not yet alkaline.
- MgSC 7H 2 O ie approximately 0.03% of Mg
- the paste has the following characteristics:
- This example shows the whole point of the invention which, while maintaining the same level of delignification and brightness enhancement performance of the conventional ZE process, makes it possible to significantly reduce the depolymerization of the cellulose.
- the same paste as in Example 1, already treated 00 is first treated with acidolysis (treatment A) at pH 3, for 3 hours at 90 ° C., and in the presence of EDTA, a conventional sequestering agent for the transition metal cations, so as to remove a part of the hexenuronic acids present.
- treatment A acidolysis
- EDTA a conventional sequestering agent for the transition metal cations
- the dough has the following characteristics
- the dough thus prepared undergoes the ZE treatment under the standard conditions of Example 1, that is to say in particular with 0.6% of ozone by weight relative to the weight of dough counted in dry.
- the paste has the following characteristics:
- Example 1 the pulp of Example 1 is treated with ozone as indicated in Example 1, and then without transition, the consistency of the paste is lowered to 10% by the solution. of sodium hydroxide and the alkaline extraction (E) is continued under the conditions of Example 1.
- the dough has the following characteristics:
- the dough has the following characteristics:
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Abstract
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Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112015030608-0A BR112015030608B1 (pt) | 2013-06-13 | 2014-06-13 | Processo para tratamento de polpa de papel e polpa de papel |
CA2916017A CA2916017C (fr) | 2013-06-13 | 2014-06-13 | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
RU2015153381A RU2670540C2 (ru) | 2013-06-13 | 2014-06-13 | Способ обработки целлюлозной массы для получения целлюлозной бумаги посредством обработки озоном в присутствии ионов магния |
CN201480032623.5A CN105556030B (zh) | 2013-06-13 | 2014-06-13 | 在镁离子存在下用臭氧处理化学纸浆的方法 |
ES14734894.0T ES2675003T3 (es) | 2013-06-13 | 2014-06-13 | Procedimiento de tratamiento de pastas papeleras químicas mediante tratamiento con ozono en presencia de iones magnesio |
PL14734894T PL3008240T3 (pl) | 2013-06-13 | 2014-06-13 | Sposób obróbki chemicznych pulp papierniczych przez traktowanie ozonem w obecności jonów magnezu |
NO14734894A NO3008240T3 (fr) | 2013-06-13 | 2014-06-13 | |
US14/896,031 US10006168B2 (en) | 2013-06-13 | 2014-06-13 | Method for treating chemical pulps by treatment with ozone in the presence of magnesium ions |
EP14734894.0A EP3008240B1 (fr) | 2013-06-13 | 2014-06-13 | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
JP2016518573A JP6401252B2 (ja) | 2013-06-13 | 2014-06-13 | マグネシウムイオンの存在下におけるオゾンでの処理により化学パルプを処理するための方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1355496A FR3007044B1 (fr) | 2013-06-13 | 2013-06-13 | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
FR1355496 | 2013-06-13 |
Publications (1)
Publication Number | Publication Date |
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WO2014199101A1 true WO2014199101A1 (fr) | 2014-12-18 |
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PCT/FR2014/051460 WO2014199101A1 (fr) | 2013-06-13 | 2014-06-13 | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
Country Status (13)
Country | Link |
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US (1) | US10006168B2 (fr) |
EP (1) | EP3008240B1 (fr) |
JP (1) | JP6401252B2 (fr) |
CN (1) | CN105556030B (fr) |
BR (1) | BR112015030608B1 (fr) |
CA (1) | CA2916017C (fr) |
CL (1) | CL2015003506A1 (fr) |
ES (1) | ES2675003T3 (fr) |
FR (1) | FR3007044B1 (fr) |
NO (1) | NO3008240T3 (fr) |
PL (1) | PL3008240T3 (fr) |
RU (1) | RU2670540C2 (fr) |
WO (1) | WO2014199101A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2018534439A (ja) * | 2015-09-30 | 2018-11-22 | イメリーズ ミネラルズ リミテッド | 水性パルプを漂白するための方法及びこれらの方法において使用するための組成物 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3007044B1 (fr) * | 2013-06-13 | 2016-01-15 | Air Liquide | Procede de traitement des pates papetieres chimiques par traitement a l'ozone en presence d'ions magnesium |
RU2724362C1 (ru) * | 2019-07-04 | 2020-06-23 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный университет промышленных технологий и дизайна (СПбГУПТД)" | Способ отбелки целлюлозы |
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WO1995006773A1 (fr) * | 1993-09-03 | 1995-03-09 | Union Camp Patent Holding, Inc. | Blanchiment d'une pâte a papier a concentration moyenne avec de l'ozone, apres decoloration de cette pâte a haute concentration avec de l'ozone |
WO2010046768A1 (fr) * | 2008-10-24 | 2010-04-29 | Arkema France | Procede de fabrication de pate a papier |
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FR2661430B1 (fr) * | 1990-04-30 | 1992-07-17 | Atochem | Procede de blanchiment au peroxyde d'hydrogene de pates a papier a haut rendement. |
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US6923887B2 (en) * | 2003-02-21 | 2005-08-02 | Alberta Research Council Inc. | Method for hydrogen peroxide bleaching of pulp using an organic solvent in the bleaching medium |
FR2910027B1 (fr) * | 2006-12-13 | 2009-11-06 | Itt Mfg Enterprises Inc | Procede de blanchiment des pates papeteries chimiques par traitement final a l'ozone a haute temperature |
DE102010001001A1 (de) * | 2010-01-19 | 2011-07-21 | Evonik Degussa GmbH, 45128 | Verfahren zur Delignifizierung und Bleiche von Zellstoff |
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CA2919327C (fr) * | 2013-08-09 | 2022-06-21 | Novozymes A/S | Reduction de la teneur en acides hexenuroniques contenus dans de la pate de cellulose |
PT3066257T (pt) * | 2013-11-06 | 2019-06-04 | Evonik Degussa Gmbh | Método para a deslignificação e branqueamento de pasta de papel |
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2013
- 2013-06-13 FR FR1355496A patent/FR3007044B1/fr not_active Expired - Fee Related
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2014
- 2014-06-13 WO PCT/FR2014/051460 patent/WO2014199101A1/fr active Application Filing
- 2014-06-13 CN CN201480032623.5A patent/CN105556030B/zh active Active
- 2014-06-13 PL PL14734894T patent/PL3008240T3/pl unknown
- 2014-06-13 ES ES14734894.0T patent/ES2675003T3/es active Active
- 2014-06-13 BR BR112015030608-0A patent/BR112015030608B1/pt active IP Right Grant
- 2014-06-13 US US14/896,031 patent/US10006168B2/en active Active
- 2014-06-13 NO NO14734894A patent/NO3008240T3/no unknown
- 2014-06-13 EP EP14734894.0A patent/EP3008240B1/fr active Active
- 2014-06-13 RU RU2015153381A patent/RU2670540C2/ru active
- 2014-06-13 CA CA2916017A patent/CA2916017C/fr active Active
- 2014-06-13 JP JP2016518573A patent/JP6401252B2/ja active Active
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2018534439A (ja) * | 2015-09-30 | 2018-11-22 | イメリーズ ミネラルズ リミテッド | 水性パルプを漂白するための方法及びこれらの方法において使用するための組成物 |
JP7013246B2 (ja) | 2015-09-30 | 2022-02-15 | イメリーズ ミネラルズ リミテッド | 水性パルプを漂白するための方法及びこれらの方法において使用するための組成物 |
Also Published As
Publication number | Publication date |
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RU2670540C2 (ru) | 2018-10-23 |
EP3008240A1 (fr) | 2016-04-20 |
CA2916017C (fr) | 2021-07-20 |
CA2916017A1 (fr) | 2014-12-18 |
CN105556030B (zh) | 2019-05-03 |
CN105556030A (zh) | 2016-05-04 |
FR3007044A1 (fr) | 2014-12-19 |
BR112015030608B1 (pt) | 2022-03-15 |
FR3007044B1 (fr) | 2016-01-15 |
ES2675003T3 (es) | 2018-07-05 |
US10006168B2 (en) | 2018-06-26 |
JP6401252B2 (ja) | 2018-10-10 |
PL3008240T3 (pl) | 2018-11-30 |
RU2015153381A3 (fr) | 2018-03-26 |
RU2015153381A (ru) | 2017-07-18 |
NO3008240T3 (fr) | 2018-09-15 |
JP2016524053A (ja) | 2016-08-12 |
BR112015030608A2 (pt) | 2017-07-25 |
US20160130751A1 (en) | 2016-05-12 |
EP3008240B1 (fr) | 2018-04-18 |
CL2015003506A1 (es) | 2016-06-03 |
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