EP2668333A1 - Verfahren zur herstellung eines papiererzeugnisses - Google Patents
Verfahren zur herstellung eines papiererzeugnissesInfo
- Publication number
- EP2668333A1 EP2668333A1 EP12700713.6A EP12700713A EP2668333A1 EP 2668333 A1 EP2668333 A1 EP 2668333A1 EP 12700713 A EP12700713 A EP 12700713A EP 2668333 A1 EP2668333 A1 EP 2668333A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pulp
- paper
- aqueous composition
- methanesulfonic acid
- composition containing
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/09—Sulfur-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/02—Agents for preventing deposition on the paper mill equipment, e.g. pitch or slime control
- D21H21/04—Slime-control agents
Definitions
- the present invention relates to a process for producing paper products, such as paper, board and board, comprising the addition of methanesulfonic acid (MSA) to an aqueous composition containing at least one pulp for adjusting the pH.
- MSA methanesulfonic acid
- the present invention relates to the use of methanesulfonic acid in the production of a paper product, in particular for adjusting the pH of an aqueous composition containing at least one fibrous material in the so-called constant part of the paper or board machine.
- Paper or paper product in the context of the present invention designate flat products made of fibers, in particular from chemically or mechanically exposed plant fibers, which are formed by dehydration of a pulp suspension using at least one screen usually with the addition of fillers and other additives.
- the production of paper products on modern paper or board machines involves the dewatering of a pulp suspension, for example a pulp, wood pulp and / or recovered paper suspension, on at least one moving screen to form a paper web.
- a pulp suspension for example a pulp, wood pulp and / or recovered paper suspension
- the following aggregates are usually grouped together: Constant part, headbox, wire section, press section, dryer section, size press (surface sizing), film press, Yankee cylinder, calender, on-line calender, on-line coater and reel.
- the manufacture of paper products involves downstream steps of surface treatment (e.g., calendering, brushing) and equipment (e.g., slitting, size cutting, packaging).
- a general description of the process steps and plant components in the production of paper products is described, for example, in "Papermill Paperback, 8th edition, Dr. med. Curt Haefner-Verlag GmbH, Heidelberg ".
- the pulp suspension is made ready for subsequent sheet formation in the wire section.
- the final or equalizing grinding of the pulp is carried out, which regulates substance quantities and material densities, and the regulation of the flow velocities is carried out.
- the addition of filling Substances, process chemicals and / or functional chemicals is usually called all plant parts and piping between the mixing and machine chest and the headbox of the paper or board machine.
- the constant part of the paper or board machine is usually also the adjustment of the pH of the pulp suspension.
- the fiber suspension with a consistency of usually less than 1.4% is applied to at least one moving endless screen (machine screen).
- machine screen the pulp suspension dewaters to a pulp density of 12 to 24% (assisted for example by the application of vacuum or pressure) and the fibers entangled to a still wet fiber fleece (sheet formation).
- This non-woven fabric is then removed from the wire using, for example, a pick-up felt (felt belt) and passed into the subsequent wet pressing where the stock density is further increased to about 50%.
- the nonwoven fabric is dried in the so-called drying section by means of drying cylinders.
- the paper may be subjected to further processing steps (e.g., smoothing, brushing, calendering).
- the pulp suspensions used for the production of paper or cardboard mostly contain fibers as well as fillers, in particular inorganic fillers such as calcium carbonate, kaolin, titanium dioxide, barium sulfate and several process and / or functional chemicals, such as sizing agent for increasing the hydrophilicity and the printability of the paper, as well as eg Retention aids, drainage aids, dyes, optical brighteners, wet strength agents, dry strength agents, defoamers, biocide.
- inorganic fillers such as calcium carbonate, kaolin, titanium dioxide, barium sulfate and several process and / or functional chemicals, such as sizing agent for increasing the hydrophilicity and the printability of the paper, as well as eg Retention aids, drainage aids, dyes, optical brighteners, wet strength agents, dry strength agents, defoamers, biocide.
- Fibers used in the manufacture of paper products generally include primary fibers and secondary fibers.
- Wood pulps in particular pulps such as sulphate pulp (SA) (also called kraft pulp), sulphate pulp, sulphite pulp (SI) of deciduous and / or softwoods are used in particular as primary pulps.
- SA sulphate pulp
- SI sulphite pulp
- woody fibers especially wood pulp such as groundwood (HS) (also called stone groundwood SGW), pressure ground (pressurized groundwood PGW), refiner pulp (refiner mechanical pulp RMP), thermomechanical pulp (thermo mechanical pulp TMP), thermomechanical pulp with chemical pretreatment (chemical thermal mechanical pulp CTMP) and thermomechanical pulp with sodium hydroxide peroxide pretreatment (BCTMP) in question.
- Secondary fibrous materials include various recovered paper grades, which are recycled in the recycling of paper / cardboard and paperboard production, and deinked ones Waste paper (Deinked pulp DIP).
- DIP is made by a wastepaper recycling process, with a large portion of the inks removed from the pulp suspension.
- the slurried, defibrated waste paper is usually mixed with caustic soda, water glass, complexing agent, surfactant and hydrogen peroxide.
- the printing inks detach from the fiber surface and are discharged by flotation from the pulp suspension.
- Pulp such as groundwood, pressure ground, TMP, RMP, but also pulp are usually bleached during manufacture and / or before use.
- oxidative and reductive bleaching stages these bleaching stages often being combined into bleaching sequences.
- bleaching involves treatment with hydrogen peroxide under alkaline conditions. If the bleaching process concludes with an alkaline step, it is usually necessary to acidify the pulp suspension. In order to adjust the pH necessary for papermaking it is therefore usually necessary to add an acid to regulate the pH.
- the pulp suspension used for the formation of paper generally comprises the addition of acidic aluminum salts and the neutral procedure in the pH between the conventional acidic procedure (pH in the range from 4.5 to 6.8) Range from 6.8 to 10.8.
- pH in the range from 4.5 to 6.8
- the pH is adjusted to a value between 7.0 to 7.5.
- the neutral driving has become more and more prevalent, especially as it is the use of calcium carbonate (CaC0 3 ) as a filler possible, for example in the form of ground calcium carbonate (grated calumum carbonate GCC) or precipitated calcium carbonate (precipitated calcium carbonate PCC).
- the pH of the pulp suspension is of crucial importance for paper production and directly influences the running behavior of the paper or board machine.
- a high pH leads to increased swelling of the fibers and complicates the dewatering of the pulp suspension.
- the accurate and reliable adjustment of the pH also helps to maintain the whiteness of the paper products and to prevent yellowing by alkalis.
- the choice of suitable pH-adjusting acids in the manufacture of paper products is very limited. Due to the requirements of availability, price and stability, the expert selects from a very limited number of acids which are suitable for papermaking.
- the use of phosphoric acid or a combination of phosphoric acid and phosphonates or the use of carbon dioxide for pH adjustment is described.
- sulfuric acid and / or bisulfite to adjust the pH value in papermaking known.
- the pH of a pulp suspension can be adjusted by adding an electrolyte such as aluminum sulfate, aluminum nitrate, polyaluminum chloride (PAC) and aluminum hydroxide chloride.
- Document WO 98/56988 describes a process for stabilizing the pH of a pulp suspension for papermaking using a combination of an alkali metal hydroxide and carbon dioxide.
- Document US 2010/0175839 describes a multi-step process for adjusting the pH of a pulp suspension, wherein the pulp is carbonated at least twice and at least once with a strong acid, e.g. Sulfuric acid, sulfurous acid or bisulfite, is treated and wherein a step for removing carbonate is included.
- a strong acid e.g. Sulfuric acid, sulfurous acid or bisulfite
- Document WO 2009/003770 discloses a papermaking process wherein a pulp suspension containing a mechanical pulp is subjected to an acid-base treatment to avoid lowering the whiteness.
- the pulp suspension is first treated with a strong acid, especially sulfuric acid, sulphurous acid, hydrochloric acid and bisulphite, followed by a weak base (e.g., an alkali metal bicarbonate or alkali metal carbonate).
- a strong acid especially sulfuric acid, sulphurous acid, hydrochloric acid and bisulphite
- a weak base e.g., an alkali metal bicarbonate or alkali metal carbonate.
- the object of the present invention is therefore to provide a pH-regulating additive, in particular an acid, for pulp suspensions in papermaking or an improved papermaking process.
- the process should fulfill all wastewater-relevant and environmental requirements and enable efficient, simple and cost-effective process management. For example, a simple metering, a low introduction of additional salt load into the screen or wastewater of the paper machine and a good dewatering behavior of the pulp suspension should be ensured.
- Methanesulfonic acid has a pK s value of about -0.6 and thus represents a strong to very strong acid.
- Methanesulfonic acid is generally non-oxidizing and is characterized in particular by heat and hydrolysis resistance.
- Methanesulfonates are used, for example, in detergents and cleaners.
- Methanesulfonic acid is still used in acid plating solutions for metal coatings.
- the present application is directed to a process for making a paper product, such as paper, board and board, comprising the steps of: a) providing an aqueous composition containing at least one pulp; b) adding methanesulfonic acid to the aqueous composition containing at least one pulp to adjust the pH; c) dewatering the aqueous composition containing at least one pulp.
- methanesulfonic acid is easily biodegradable and halogen-free and thus relieves the wastewater treatment of the manufacturing process. In addition, no or a significantly lower phosphorus or phosphate pollution in the wastewater of the paper or board machine.
- Methanesulfonic acid is colorless and odorless and also available in high-purity quality, so there is no burden on the production system (process water, wastewater, circulating water, paper products) with foreign substances. Therefore, methanesulfonic acid is particularly suitable for use in the manufacture of paper products (e.g., packaging materials) used in the food industry.
- Methanesulfonic acid has high thermal stability, has low vapor pressure, is resistant to hydrolysis, and is immiscible with water indefinitely, so handling and dosing are easy.
- Methanesulfonic acid is halogen-free and has a low corrosivity compared to sulfuric acid.
- methanesulfonic acid thus makes it possible to significantly improve the quality of the production of paper products.
- Paper or paper product in the context of the present invention designate flat products made of fibers, in particular from chemically or mechanically exposed plant fibers, which are formed by dehydration of a pulp suspension using at least one screen usually with the addition of fillers and other additives.
- process chemicals eg biocides, deaerators, retention aids
- functional chemicals eg dyes, optical brighteners, wet strength agents.
- paper or paper products are to be understood in particular as meaning graphic papers, office communication papers, packaging papers, hygiene papers and special papers.
- fish papers are all papers which are used for printing, for example, in flexographic printing, high-pressure, offset printing or intaglio printing, for example newsprint papers.
- Office communication papers are to be understood as writing, printing and copying papers, for example photo printing and digital printing papers.
- Packaging papers are papers, cardboard and cardboard for packaging purposes, eg corrugated board.
- tissue papers are papers with a high specific volume and high suction force, which are typically used in the sanitary and kitchen sector or in the industrial sector.
- special papers refers to papers and boards for special technical purposes, such as decor papers and filter papers.
- paper products can be classified into paper, cardboard and possibly cardboard.
- a basis weight of less than or equal to 225 g / m 2 of paper and greater than 225 g / m 2 of cardboard is used.
- paper products with a basis weight in the range of 7 to 150 g / m 2 are referred to as paper, in the range of 150 to 600 g / m 2 as cardboard and from 600 g / m 2 as cardboard.
- Cardboard and paperboard are predominantly made up of several layers.
- the present invention relates to a method as described above, characterized in that when dewatering the aqueous composition (step c) a nonwoven fabric is formed, which is pressed and / or dried in one or more further process step (s).
- the aqueous composition is a suspension (slurry) of a pulp in water.
- the aqueous composition may contain further dissolved, colloidally dissolved or solid constituents.
- it is known to those skilled ingredients that are used in the production of paper products or incurred.
- the pulp may in particular be selected from:
- pulp such as sulphate pulp (SA) (also called kraft pulp), sulphate half-pulp, sulphite pulp (S1);
- SA sulphate pulp
- S1 sulphite pulp
- mechanical pulp such as groundwood (SG), pressurized groundwood (PGW), refiner mechanical pulp (RMP), thermomechanical pulp (TMP), thermomechanical pulp with chemical pretreatment (chemical thermal mechanical pulp CTMP), thermomechanical pulp with caustic soda / peroxide pretreatment (BCTMP);
- Secondary pulp such as waste paper (AP) and deinked pulp (DIP).
- AP waste paper
- DIP deinked pulp
- bleached and / or unbleached pulps and / or fibers of deciduous or softwoods described above may be used as fibrous materials. Preference is given to using beech sulphite pulp and / or long fiber sulphate pulp.
- the aqueous composition comprises at least one fibrous material selected from the group consisting of sulphate pulp (SA), sulphate half-cell pulp, sulphite pulp (SI), groundwood (HS), pressure groundwood (PGW), refiner pulp (RMP), thermomechanical pulp (TMP), thermomechanical pulp with chemical pretreatment (CTMP), thermomechanical pulp with caustic soda / peroxide pretreatment (BCTMP), waste paper (AP) and deinked waste paper (DIP).
- SA sulphate pulp
- SI groundwood
- PGW pressure groundwood
- RMP refiner pulp
- TMP thermomechanical pulp
- TMP thermomechanical pulp with chemical pretreatment
- CTMP thermomechanical pulp with caustic soda / peroxide pretreatment
- AP waste paper
- DIP deinked waste paper
- At least one secondary fiber in particular waste paper and / or deinked waste paper (DIP), is used as the pulp.
- DIP deinked waste paper
- the aqueous composition contains at least one pulp which has been bleached by alkaline oxidative.
- the aqueous composition containing at least one pulp preferably has a pulp density of 0.01 to 5%, preferably 0, 1 to 5%, particularly preferably 0.2 to 1.4%.
- the consistency of an aqueous composition containing at least one fiber is understood as meaning the percentage of the dry mass of the solids which can be filtered off in the composition in relation to the mass of the entire composition.
- the dry matter is usually stated as absolute dry matter (atro) or as dry matter during drying under standard conditions (oven-dry, otro).
- the determination of the consistency of pulp suspensions is described for example in DIN 54359 (EN ISO 41 19).
- the aqueous composition may comprise at least one customary additive known to the person skilled in the art (process and functional chemicals).
- the additive can be selected from Process chemicals, like
- Electrolyte for example, aluminum sulfate, aluminum nitrate, polyaluminum chloride (PAC), aluminum hydroxide chloride, inorganic precipitants
- Biocide e.g., slimicides
- Adsorbents e.g., talc
- Fixatives e.g., short chain cationic polymers
- Retention aids e.g., long chain anionic and cationic polymers, partially cross-linked
- Engine sizing agent rosin size, AKD, ASA, polymer size
- the aqueous composition additionally contains at least one further additive selected from the group consisting of aluminum sulfate, aluminum nitrate, polyaluminum chloride (PAC), aluminum hydroxide chloride, organic precipitant, biocide, deaerator, defoamer, dispersant, adsorbent, fixer, Retention aid, drainage accelerator, dye, optical brightener, engine sizing agent, wet strength agent, dry strength agent and internal wet web strength polymer (IWWS).
- PAC polyaluminum chloride
- IWWS internal wet web strength polymer
- the aqueous composition additionally comprises at least one inorganic filler selected from the group consisting of grinded calcium carbonate (GCC), precipitated calcium carbonate (PCC), kaolin, titanium dioxide and barium sulfate, preferably selected from the group consisting of ground calcium carbonate ( GCC) and precipitated calcium carbonate (PCC).
- GCC grinded calcium carbonate
- PCC precipitated calcium carbonate
- kaolin titanium dioxide
- barium sulfate preferably selected from the group consisting of ground calcium carbonate ( GCC) and precipitated calcium carbonate (PCC).
- the pH of an aqueous composition comprising at least one fibrous material is adjusted in particular by adding methanesulfonic acid until the desired pH or the desired pH range has been reached.
- methanesulfonic acid The person skilled in common methods for controlling the pH are known.
- the amount of methanesulfonic acid added depends on the type of aqueous composition containing at least one pulp and its initial value of the pH and the
- the pH of the aqueous composition containing at least one fibrous material can be adjusted by adding a mixture of acids containing methanesulfonic acid. It is also conceivable to use a mixture of methanesulfonic acid and carbon dioxide or a mixture of acids containing methanesulfonic acid and carbon dioxide. In particular, methanesulfonic acid is added as the sole acid to adjust and / or stabilize the pH. In addition, it is conceivable to additionally carry out the adjustment or regulation of the pH of the aqueous composition by adding a base known to the person skilled in the art.
- the present invention relates to a process for producing a paper product as described above, characterized in that the pH of the aqueous composition containing at least one pulp to a value in the range of 4 to 1 1, in particular in the range of 4.5 to 6 8, in particular in the range of 6.8 to 10.8. If the method according to the invention relates to a method for producing a paper product using the acidic method of driving, in particular a pH in the range from 4.5 to 6.8 is set by addition of methanesulfonic acid.
- the process according to the invention relates to a process for the production of a paper product using the so-called neutral procedure (usually with use of calcium carbonate as filler)
- the pH of the aqueous composition containing at least one fibrous material is preferably in the range of 6.8 to 10.8; especially adjusted from 7.0 to 7.5.
- the process for producing a paper product described in the present application may comprise further conventional process steps of paper or board production, eg steps in stock preparation comprising dispersion, sorting, grinding of the pulp, steps following the drying, such as calendering, brushing, Cutting as well as steps concerning the equipment.
- the addition of methanesulfonic acid to the aqueous composition containing at least one pulp may occur at one or more different stages of the process of making the paper product.
- the addition of methanesulfonic acid to the aqueous composition containing at least one pulp takes place in the constant part of a paper machine.
- constant part for the purposes of the present invention is generally referred to all parts of the plant and pipeline between the mixing and machine chest and the headbox of the paper or board machine.
- the pulp suspension is made ready for subsequent sheet formation in the wire section.
- the final or Ausretesmahlung the pulp is performed, which regulates substance quantities and material densities, as well as the control of the flow rates performed.
- the constant part of the paper or board machine is in particular a uniform dilution of the aqueous composition containing at least one pulp (pulp suspension) of about 3 to 5% consistency (thick stock) to about 0.2 to 1, 4% consistency.
- pulp suspension of fiber bundles, sand, plastics, etc. cleaned.
- the process according to the invention can be used for the production of all paper products known to the person skilled in the art.
- the method according to the invention relates to the production of a paper product selected from graphic paper, office communication paper, packaging paper, cardboard, cardboard, tissue paper and special paper, preferably a method for producing a graphic paper or office communication paper.
- the invention relates to a method for producing a paper product, characterized in that the paper product is a packaging material for the food sector.
- the present application is directed to the use of methanesulfonic acid in the manufacture of a paper product.
- the use according to the invention of methanesulfonic acid in the production of a paper product comprises adjusting the pH of an aqueous composition comprising at least one fibrous material.
- the use of methanesulfonic acid according to the invention relates to the production of paper products on industrially common paper and / or board machines.
- the use of methanesulfonic acid comprises adjusting the pH of an aqueous composition containing at least one pulp in the constant part of a paper and board machine.
- the methanesulfonic acid can be used before the headbox.
- the invention relates to the use of methanesulfonic acid in the manufacture of a paper product selected from graphic paper, office communication paper, packaging paper, cardboard, cardboard, tissue paper and special paper, in particular a packaging material for the food industry.
Landscapes
- Paper (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12700713.6A EP2668333B1 (de) | 2011-01-25 | 2012-01-25 | Verfahren zur herstellung eines papiererzeugnisses |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11152045 | 2011-01-25 | ||
EP12700713.6A EP2668333B1 (de) | 2011-01-25 | 2012-01-25 | Verfahren zur herstellung eines papiererzeugnisses |
PCT/EP2012/051071 WO2012101137A1 (de) | 2011-01-25 | 2012-01-25 | Verfahren zur herstellung eines papiererzeugnisses |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2668333A1 true EP2668333A1 (de) | 2013-12-04 |
EP2668333B1 EP2668333B1 (de) | 2014-10-29 |
Family
ID=45509522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12700713.6A Not-in-force EP2668333B1 (de) | 2011-01-25 | 2012-01-25 | Verfahren zur herstellung eines papiererzeugnisses |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2668333B1 (de) |
CN (1) | CN103384742A (de) |
BR (1) | BR112013019045A2 (de) |
CA (1) | CA2825337A1 (de) |
WO (1) | WO2012101137A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2924166A1 (de) * | 2014-03-25 | 2015-09-30 | Basf Se | Verfahren zur Herstellung von gebleichtem Holzfaserstoff |
CN106317952B (zh) * | 2016-08-19 | 2018-03-09 | 福建中烟工业有限责任公司 | 一种增白组合物、其制备方法及用途 |
CN106868924A (zh) * | 2016-12-30 | 2017-06-20 | 芜湖市哈贝纸业有限公司 | 一种抗压缩瓦楞原纸 |
CN106835832A (zh) * | 2016-12-30 | 2017-06-13 | 芜湖市哈贝纸业有限公司 | 一种抗菌防霉包装箱用纸 |
CN109610233B (zh) * | 2018-12-14 | 2021-09-14 | 玖龙纸业(东莞)有限公司 | 一种用于牛皮纸和白牛皮纸的表胶胶液改良剂及其制备方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3682089B2 (ja) * | 1994-04-14 | 2005-08-10 | 株式会社パーマケム・アジア | 工業用殺菌剤 |
FI102911B (fi) | 1997-06-13 | 1999-03-15 | Aga Ab | Menetelmä massasuspension pH:n stabiloimiseksi ja paperin tuottamiseks i stabiloidusta massasta |
FI20030490A (fi) * | 2003-04-01 | 2004-10-02 | M Real Oyj | Menetelmä kuitukoostumuksen valmistamiseksi |
US7683121B2 (en) * | 2004-04-05 | 2010-03-23 | Nalco Company | Stable wet strength resin |
FR2869625B1 (fr) * | 2004-04-29 | 2007-09-21 | Snf Sas Soc Par Actions Simpli | Procede de fabrication de papier et carton, nouveaux agents de retention et d'egouttage correspondants, et papiers et cartons ainsi obtenus |
PT1825057E (pt) * | 2004-12-14 | 2015-07-02 | Solenis Technologies Cayman Lp | Adjuvantes da retenção e da drenagem |
US7638016B2 (en) * | 2005-02-19 | 2009-12-29 | International Paper Company | Method for treating kraft pulp with optical brighteners after chlorine bleaching to increase brightness |
FI20075503L (fi) | 2007-07-03 | 2008-06-19 | Stora Enso Oyj | Menetelmä paperin valmistamiseksi ja happo/emäskäsittelyn käyttö paperin valmistuksessa |
FI122898B (fi) | 2009-01-14 | 2012-08-31 | Linde Ag | Menetelmä selluloosamassan pH:n säätämiseksi, sellun tai paperin valmistus selluloosamassasta ja (bi)karbonaattipoiston käyttö haponkulutuksen vähentämiseksi |
-
2012
- 2012-01-25 BR BR112013019045A patent/BR112013019045A2/pt not_active Application Discontinuation
- 2012-01-25 WO PCT/EP2012/051071 patent/WO2012101137A1/de active Application Filing
- 2012-01-25 CN CN2012800095994A patent/CN103384742A/zh active Pending
- 2012-01-25 CA CA2825337A patent/CA2825337A1/en not_active Abandoned
- 2012-01-25 EP EP12700713.6A patent/EP2668333B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2012101137A1 * |
Also Published As
Publication number | Publication date |
---|---|
BR112013019045A2 (pt) | 2017-01-31 |
CN103384742A (zh) | 2013-11-06 |
EP2668333B1 (de) | 2014-10-29 |
WO2012101137A1 (de) | 2012-08-02 |
CA2825337A1 (en) | 2012-08-02 |
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