WO2018096737A1 - Agent de prévention de tartre de sel de sodium, procédé de prévention de tartre de sel de sodium, agent de réduction de viscosité de système aqueux, procédé de gestion de système aqueux et procédé de réduction de viscosité de système aqueux - Google Patents

Agent de prévention de tartre de sel de sodium, procédé de prévention de tartre de sel de sodium, agent de réduction de viscosité de système aqueux, procédé de gestion de système aqueux et procédé de réduction de viscosité de système aqueux Download PDF

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WO2018096737A1
WO2018096737A1 PCT/JP2017/029467 JP2017029467W WO2018096737A1 WO 2018096737 A1 WO2018096737 A1 WO 2018096737A1 JP 2017029467 W JP2017029467 W JP 2017029467W WO 2018096737 A1 WO2018096737 A1 WO 2018096737A1
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sodium salt
salt scale
containing polymer
mol
sulfonic acid
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PCT/JP2017/029467
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English (en)
Japanese (ja)
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正幸 村野
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栗田工業株式会社
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Priority to CN201780070999.9A priority Critical patent/CN110023253B/zh
Publication of WO2018096737A1 publication Critical patent/WO2018096737A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances

Definitions

  • the present invention relates to a sodium salt scale inhibitor, a sodium salt scale prevention method, an aqueous viscosity reducing agent, an aqueous management method, and an aqueous viscosity reducing method.
  • a substance dissolved or suspended in water precipitates, precipitates or deposits on the solid surface and solidifies to generate scale.
  • the chemical species of the scale vary depending on the generated water system, for example, calcium carbonate, calcium sulfate, calcium sulfite, calcium phosphate, calcium silicate, magnesium silicate, magnesium hydroxide, zinc phosphate, zinc hydroxide, basic zinc carbonate, etc. Is mentioned.
  • Scales are used in industrial water systems such as boilers, cooling water systems, garbage incinerators, steel dust collection systems, flue gas desulfurization equipment, seawater desalination equipment, etc. It adheres to pipes, walls, etc., and causes various problems such as a decrease in heat exchange rate, damage to the equipment, pump pressure increase, flow rate decrease, production volume decrease, operation interruption, and waste of energy.
  • the scale is likely to be generated under high temperature and high alkali conditions, and once it is generated, removal thereof is not easy. Therefore, it is desired to continuously prevent scale adhesion without stopping the operation.
  • Patent Document 1 in a kraft pulp manufacturing process, as a method for preventing scale adhesion that effectively prevents a scaling phenomenon occurring inside a digester, polymaleic acid or its A method of adding salt has been proposed. Further, Patent Document 2 discloses that as a method for continuously preventing scale adhering to the digester in the kraft pulp manufacturing process and its surrounding piping, equipment, etc., the acrylic acid-itaconic acid co-polymer is added to the digester in the digester. A method of adding a polymer or a salt thereof has been proposed.
  • Patent Document 3 discloses maleic acid-acrylic acid-2 as a scale adhesion inhibitor that continuously prevents calcium salt scale adhering to the digester in the kraft pulp manufacturing process and its surrounding pipes and facilities.
  • a scale adhesion inhibitor containing an acrylamido-2-methylpropanesulfonic acid terpolymer has been proposed.
  • Patent Document 4 proposes a method of adding a phosphonic acid derivative salt to a digester as a method for improving the suppression of calcium salt scale formation in the chemical pulping process.
  • the black liquor after the chips are digested with alkali is concentrated and used as fuel, and the alkali is recovered. Since the viscosity of the black liquor increases as the black liquor is concentrated, in recent years, sodium sulfate as a viscosity reducing agent has been widely added to the black liquor (for example, Non-Patent Documents 1 and 2). Even in such an aqueous system, scale is generated, and the thermal efficiency at the time of concentration is lowered, so that efficient concentration may not be possible.
  • Japanese Patent Publication No. 2-53551 Japanese Patent Laid-Open No. 4-136286 Japanese Patent No. 3194867 JP-T-2004-532945
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a method for preventing the generation of scale in an aqueous system containing a large amount of sodium ions, such as the concentrated black liquor described above.
  • the present inventor has developed a sodium salt (sodium sulfate, sodium carbonate, etc.) derived from sodium sulfate as a viscosity reducing agent. It was discovered that generation of scales derived from sodium ions can be prevented by adding the polymer and a predetermined polymer to the aqueous system, and the present invention has been completed. Specifically, the present invention provides the following.
  • the first invention of the present invention is a sodium salt scale inhibitor containing a sulfone group-containing polymer having at least an unsaturated sulfonic acid monomer as a monomer.
  • the second invention of the present invention is the sodium salt scale inhibitor according to the first invention, wherein the sulfone group-containing polymer has a weight average molecular weight of 700 g / mol to 70,000 g / mol.
  • the number of moles of the unsaturated sulfonic acid monomer constituting the sulfone group-containing polymer in the first or second invention constitutes the sulfone group-containing polymer.
  • the sodium salt scale inhibitor is 3 mol% or more.
  • the unsaturated sulfonic acid monomer is vinyl sulfonic acid, allyl sulfonic acid, 2-acrylamido-2-methyl.
  • the sulfone group-containing polymer comprises at least an unsaturated sulfonic acid monomer and a carboxylic acid monomer. It is a sodium salt scale inhibitor which is a copolymer used as a polymer.
  • the unsaturated carboxylic acid monomer is acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, and these A sodium salt scale inhibitor which is at least one selected from the group consisting of alkali metal salts and ammonium salts.
  • a seventh invention of the present invention is a method for preventing sodium salt scale, wherein the sodium salt scale inhibitor according to any one of the first to sixth inventions is added to an aqueous system.
  • the eighth invention of the present invention is the sodium salt scale prevention method according to the seventh invention, wherein the sodium salt scale inhibitor is added to an aqueous system such that the concentration of the sodium salt scale inhibitor is 1 mg / L or more and 1000 mg / L or less. .
  • a ninth invention of the present invention is the sodium salt scale prevention method according to the seventh or eighth invention, wherein the aqueous system contains 1% by mass or more of sodium sulfate.
  • a tenth aspect of the present invention is the sodium salt scale prevention method according to any of the seventh to ninth aspects, wherein the aqueous system is black liquor in a kraft pulp manufacturing process.
  • the eleventh invention of the present invention is an aqueous viscosity reducing agent comprising sodium sulfate and a sulfone group-containing polymer having at least an unsaturated sulfonic acid monomer as a monomer.
  • the twelfth invention of the present invention is a step of adding sodium sulfate to the same aqueous system and a step of adding a sulfone group-containing polymer containing at least an unsaturated sulfonic acid monomer as a monomer It is the management method of the water system containing.
  • the thirteenth invention of the present invention is a step of adding sodium sulfate to the same aqueous system, and a step of adding a sulfone group-containing polymer containing at least an unsaturated sulfonic acid monomer as a monomer Is a water-based viscosity reduction method.
  • the sodium salt scale inhibitor according to the present embodiment includes at least a sulfone group-containing polymer having an unsaturated sulfonic acid monomer as a monomer.
  • the sulfone group-containing polymer has at least an unsaturated sulfonic acid monomer as a monomer.
  • the sulfone group of the sulfone group-containing polymer has high affinity with sodium ions and can be held in an ionic state. Thereby, generation
  • An unsaturated sulfonic acid monomer refers to a compound having a sulfone group and a polymerizable functional group.
  • the unsaturated sulfonic acid monomer has, for example, a sulfone group and a carbonyl group, and the bond between the ⁇ -position carbon and the ⁇ -position carbon of the carbonyl carbon is an unsaturated carbon bond. It may be a compound.
  • the unsaturated sulfonic acid monomer includes, for example, vinyl sulfonic acid, allyl sulfonic acid, 2-acrylamido-2-methylpropane sulfonic acid, 3-allyloxy-2-hydroxy-1-sulfone.
  • One or more selected from acids, 2-methacrylamide-2-methylpropanesulfonic acid, styrenesulfonic acid, isoprenesulfonic acid, acrylamidomethylsulfonic acid and alkali metal salts or ammonium salts thereof can be used.
  • examples of the alkali metal salt include a sodium salt and a potassium salt
  • examples of the ammonium salt include salts of ammonia, monomethylamine, dimethylamine, monoethylamine, diethylamine, and the like.
  • the number of moles of the unsaturated sulfonic acid monomer in the sulfone group-containing polymer is 100 mol% when the total number of moles of all the monomers constituting the sulfone group-containing polymer is 100 mol%.
  • it is preferably 3 mol% or more, more preferably 5 mol% or more, further preferably 6 mol% or more, and particularly preferably 8 mol% or more.
  • the number of moles of the unsaturated sulfonic acid monomer is equal to or greater than the required amount, the effect of preventing sodium salt scale generation can be enhanced.
  • the number of moles of the unsaturated sulfonic acid monomer may be less than 3 mol%.
  • the number of moles of the unsaturated sulfonic acid monomer is, for example, 100 mole% or less when the total number of moles of all monomers constituting the sulfone group-containing polymer is 100 mole%. 90 mol% or less, 80 mol% or less, 70 mol% or less, 60 mol% or less, 50 mol% or less, 40 mol% or less, 30 mol% or less, 20 mol% or less, or 10 mol% or less. .
  • the sulfone group-containing polymer may be a polymer having at least an unsaturated sulfonic acid monomer and an unsaturated carboxylic acid monomer as monomers.
  • an unsaturated carboxylic acid monomer refers to a compound in which the bond between the ⁇ -position carbon and the ⁇ -position carbon of the carboxylic acid is an unsaturated carbon bond.
  • the unsaturated carboxylic acid monomer includes, for example, acrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconic acid, itaconic anhydride, and alkali metal salts and ammonium salts thereof.
  • the alkali metal salt include a sodium salt and a potassium salt
  • examples of the ammonium salt include salts of ammonia, monomethylamine, dimethylamine, monoethylamine, diethylamine, and the like.
  • the sulfone group-containing polymer is a polymer other than the above-mentioned unsaturated carboxylic acid monomer and unsaturated sulfonic acid monomer as long as the effects of the present invention are not impaired. It is good also as a component of.
  • other monomers include, for example, vinyl phosphonic acid, glycerin monoallyl ether, allyl alcohol, (meth) acrylamide, N-alkyl (meth) acrylamide, (meth) acrylonitrile, vinyl acetate, styrene, And isobutylene.
  • the sulfone group-containing polymer when the total number of moles of all the monomers constituting the sulfone group-containing polymer is 100 mol%, the sulfone group-containing polymer contains other monomers, for example, 95 mol% or less. 90 mol% or less, 80 mol% or less, 70 mol% or less, 60 mol% or less, 50 mol% or less, 40 mol% or less, 30 mol% or less, 20 mol% or less, 10 mol% or less, 8 mol% or less 6 mol% or less, 5 mol% or less, 4 mol% or less, 3 mol% or less, 2 mol% or less, 1 mol% or less, 0.5 mol% or less, 0.2 mol% or less, 0.1 mol%
  • 0.05 mol% or less, 0.02 mol% or less, or 0.01 mol% or less may be contained.
  • the weight average molecular weight (M w ) of the sulfone group-containing polymer is, for example, preferably 200 g / mol or more, more preferably 700 g / mol or more, and 1,000 g / mol or more. More preferably, it is particularly preferably 2,000 g / mol or more.
  • the weight average molecular weight of the sulfone group-containing polymer is preferably 120,000 g / mol or less, more preferably 70,000 g / mol or less, and further preferably 50,000 g / mol or less.
  • the weight average molecular weight may be less than 200 g / mol or more than 120,000 g / mol.
  • the weight average molecular weight of the sulfone group-containing polymer is a required amount, it is possible to enhance the effect of preventing sodium salt scale generation.
  • the weight average molecular weight of the polymer having a carboxyl group is 120,000 or less, an increase in the aqueous viscosity due to the addition of the polymer can be suppressed, and handling can be facilitated.
  • the “weight average molecular weight” refers to a value obtained by gel permeation chromatography using polyethylene glycol having a known molecular weight as a standard substance.
  • water-soluble polymerization initiator examples include azo initiators such as 4,4′-azobis (4-cyanovaleric acid), 2,2′-azobis (2-methylpropionamidine) dihydrochloride, ammonium persulfate, Examples thereof include persulfate initiators such as sodium persulfate and potassium persulfate, and peroxide initiators such as hydrogen peroxide and sodium periodate.
  • azo initiators such as 4,4′-azobis (4-cyanovaleric acid), 2,2′-azobis (2-methylpropionamidine) dihydrochloride, ammonium persulfate
  • persulfate initiators such as sodium persulfate and potassium persulfate
  • peroxide initiators such as hydrogen peroxide and sodium periodate.
  • alcohols, phosphoric acids, etc. can be used as a chain transfer agent as needed. In such a case, the polymerization is usually completed in 3 to 6 hours, and an aqueous solution of the sulfone group-containing
  • the sodium salt scale inhibitor may contain components other than the sulfone group-containing polymer as long as the effects of the object of the present invention are not impaired.
  • the sodium salt scale inhibitor can contain polyacrylic acid (salt), polymaleic acid (salt), and the like.
  • the sulfone group-containing polymer can be used as a viscosity reducing agent in combination with sodium sulfate. In one embodiment, it can be set as the formulation containing sodium sulfate and the above-mentioned sulfone group containing polymer as a viscosity reducing agent.
  • a viscosity reducing agent By using such a viscosity reducing agent, it is possible to reduce the viscosity of an aqueous system having a high viscosity, such as black liquor in a kraft pulp manufacturing process, or to suppress the increase without generating scale.
  • the sodium salt scale prevention method according to this embodiment is a sodium salt scale prevention method in which the sodium salt scale inhibitor described above is added to an aqueous system.
  • An aqueous system containing sodium sulfate at a high concentration (for example, 1% by mass or more, 2% by mass or more, 3% by mass or more) is likely to generate a sodium salt scale.
  • a sodium salt scale inhibitor By adding the above-mentioned sodium salt scale inhibitor to such an aqueous system so that the concentration of the sodium salt scale inhibitor is 1 mg / L or more and 1000 mg / L or less, generation of sodium salt scale is prevented. can do.
  • the concentration of the sodium salt scale inhibitor is preferably 1 mg / L or more, more preferably 5 mg / L or more, still more preferably 10 mg / L or more, and particularly preferably 50 mg / L or more in an aqueous system. Added. When the concentration of the sodium salt scale inhibitor in water is equal to or higher than the required concentration, the effect of preventing the generation of sodium salt scale can be enhanced. However, the concentration of the sodium salt scale inhibitor may be less than 1 mg / L.
  • the concentration of the sodium salt scale inhibitor is preferably 1,000 mg / L or less, more preferably 500 mg / L or less, still more preferably 300 mg / L or less, and particularly preferably 200 mg / L or less. Add to water system. When the concentration of the sodium salt scale inhibitor in water is equal to or higher than the required concentration, the effect of preventing the generation of sodium salt scale can be enhanced. However, the concentration of the sodium salt scale inhibitor may be more than 1000 mg / L.
  • the aqueous system to which the sodium salt scale prevention method is applied is not particularly limited as long as the aqueous system has a high sodium ion content.
  • the treatment in the boiler can be added directly to the feed water or brackish water drum.
  • the steel converter dust collection water system it can be added to the thickener treated water pit, added directly to the circulating water, or added to the slurry pit after the dust catcher.
  • the digester in the pulp manufacturing process it can be added directly to the kettle, added to the circulation line in the kettle, or added to the white liquor replenished to the kettle.
  • the black liquor concentration process of a pulp manufacturing process it can add to a dilute black liquor tank or a dilute black liquor feed line.
  • the aqueous management method according to the present embodiment is a method including a step of adding sodium sulfate and a step of adding the above-described sulfone group-containing polymer to the same aqueous system.
  • timing of the step of adding sodium sulfate or the step of adding the sulfone group-containing polymer and the order of those steps (addition) are not particularly limited.
  • the aqueous viscosity reducing method according to the present embodiment is a method including a step of adding sodium sulfate and a step of adding the above-mentioned sodium salt scale inhibitor to the same aqueous system.
  • timing of the step of adding sodium sulfate or the step of adding the sulfone group-containing polymer and the order of those steps (addition) are not particularly limited.
  • Pulp production equipment examples of a pulp production facility will be described as an aqueous system to which the sodium salt scale inhibitor or the prevention method according to the present embodiment is applied, but the present invention is not limited to the following description.
  • FIG. 1 is a schematic configuration diagram of a pulp manufacturing system 1 using wood chips according to an embodiment of the present invention.
  • the pulp production system 1 includes a cooking system 10, a black liquor treatment system 20, a green liquor production system 30, and a green liquor treatment system 40, which are communicated with each other through a pipe indicated by a solid line in FIG. A path is formed and fluid in the pulp production system circulates.
  • the cooking system 10, the black liquor processing system 20, the green liquor production system 30, and the green liquor processing system 40 further include an introduction section as introduction means (not shown).
  • introduction section as introduction means
  • the cooking system 10 has a digester 11 having heaters (not shown) at the upper part and / or the lower part, and a pulp refining section is provided downstream of the digester 11.
  • a pulp refining section is provided downstream of the digester 11.
  • wood chips that are raw materials for pulp and white liquor containing sodium hydroxide are charged to digest the wood chips.
  • the resulting pulp (pulp slurry) is transferred to a pulp refining section, where it undergoes bleaching, papermaking processes, and the like in order to produce paper.
  • the black liquor which is a waste liquid, is transferred to an evaporator 21 described later for recovery of sodium hydroxide and the like.
  • the black liquor processing system 20 includes an evaporator 21 and a boiler 22 in order from the upstream.
  • the black liquor is added with sodium sulfate as a viscosity reducing agent, concentrated using the evaporator 21, transferred to the boiler 22, and burned in the boiler 22.
  • the inorganic sodium salt contained in the black liquor is melted and discharged as green liquor (smelt) from the bottom of the boiler 22.
  • the discharged green liquid is transferred to the dissolution tank 31.
  • the green liquor production system 30 includes a dissolution tank 31, a green liquor clarifier 32, and a green liquor tank 33 in order from the upstream.
  • the green liquor is dissolved in the dissolution tank 31 with stirring. Thereby, in addition to sodium hydroxide, a green liquor rich in sodium carbonate is produced.
  • the dissolution tank 31 is provided with a liquid feed pump (not shown), and the green liquid is sucked into the liquid feed pump and transferred to the green liquid clarifier 32. In the green liquor, the remaining undissolved components are removed by the green liquor clarifier 32. Thereafter, it is transferred to the green liquor tank 33 and stored, and is eventually transferred to the causticizing system 41.
  • the green liquor treatment system 40 includes a causticization system 41, a white liquor clarifier 42, and a white liquor tank 43 in order from the upstream, and a kiln 44 downstream of the white liquor clarifier 42.
  • the causticizing system 41, the white liquor clarifier 42, and the white liquor tank 43 are in communication with each other and constitute a circulation path as a whole.
  • the kiln 44 communicates with the causticizing system 41.
  • the green liquor is mixed with calcium oxide supplied from the kiln 44 in the causticizing system 41.
  • the causticizing system 41 includes a breaker 411 and a plurality of causticizing reaction tanks 412 located downstream thereof.
  • the green liquor (usually 90 to 100 ° C., pH 13 to 14) transferred to the breaker 411 is mixed with calcium oxide supplied to the breaker 411 as well.
  • calcium oxide is dehydrated with water to produce calcium hydroxide.
  • sodium carbonate in the green liquor reacts with calcium hydroxide to produce sodium hydroxide and calcium carbonate.
  • the white liquor thus obtained is transferred to the white liquor clarifier 42.
  • this white liquor clarifier 42 after insoluble calcium carbonate is settled and separated, the white liquor is stored in the white liquor tank 43 and eventually circulated to the digester 11 for reuse.
  • the separated calcium carbonate is recovered into the kiln 44, roasted, returned to calcium oxide, and reused in the causticizing system 41.
  • the introduction unit is, for example, in the cooking system 10 or the black liquor processing system 20, and a sodium salt scale inhibitor is introduced.
  • the black liquor treatment system 20 As described above, sodium sulfate is added as a viscosity reducing agent, and sodium ions are present at a high concentration. Then, when the aqueous system is concentrated by the evaporator 21, sodium ions are precipitated as sodium sulfate or sodium carbonate to form a sodium salt scale. And this sodium salt scale is concerned about the problem of thermal efficiency. On the other hand, the sodium salt scale inhibitor introduced from the introduction part suppresses the scale at the introduction site and downstream thereof.
  • scale prevention is not particularly limited, but means, for example, prevention of scale formation / attachment or removal of attached scale.
  • the introduction portion may be an arbitrary portion of the fluid flow path described above, and is preferably a portion where suppression of the occurrence of a problem due to scale is required or upstream thereof. For example, it can be introduced into the digester 11 and the boiler 22.
  • AMPS sodium 2-acrylamido-2-methylpropanesulfonate
  • HAPS sodium 3-allyloxy-2-hydroxy-1-propanesulfonate
  • the concentrate was filtered using a Kutani ware versatile teapot dedicated wire mesh (61 mm), and the mass of the residue relative to the mass of the black liquor (hereinafter referred to as “residue rate”) was measured.
  • molar ratio unsaturated sulfonic acid monomer
  • Table 1 shows the chemical species of the sodium salt scale inhibitors used in Examples 1 to 8 and Comparative Examples 1 to 8.
  • Table 2 shows the residual ratio (%) measured in Examples 1 to 11 and Comparative Examples 1 to 5.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

La présente invention a pour objet de fournir un procédé permettant d'empêcher l'apparition de tartre dans des systèmes aqueux qui contiennent une grande quantité d'ions sodium. Cet agent de prévention de tartre de sel de sodium comprend un polymère contenant un groupe sulfone qui comporte au moins un monomère à base d'acide sulfonique insaturé en tant que monomères. Il est préférable que, pour le polymère contenant un groupe sulfone, le poids moléculaire moyen en poids soit compris entre 700 g/mol er 70 000 g/mol. Lorsque le total des nombres de moles de tous les monomères constituant le polymère contenant un groupe sulfone est de 100 % en moles, le nombre molaire de monomère à base d'acide sulfonique insaturé constituant le polymère contenant un groupe sulfone est, de préférence, d'au moins 3 % en moles.
PCT/JP2017/029467 2016-11-25 2017-08-16 Agent de prévention de tartre de sel de sodium, procédé de prévention de tartre de sel de sodium, agent de réduction de viscosité de système aqueux, procédé de gestion de système aqueux et procédé de réduction de viscosité de système aqueux WO2018096737A1 (fr)

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CN201780070999.9A CN110023253B (zh) 2016-11-25 2017-08-16 钠盐垢防止剂、钠盐垢防止方法、水系的减粘剂、水系的管理方法和水系的减粘方法

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JP2016229198A JP6365639B2 (ja) 2016-11-25 2016-11-25 ナトリウム塩スケール防止剤、ナトリウム塩スケール防止方法、水系の粘度低減剤、水系の管理方法及び水系の粘度低減方法
JP2016-229198 2016-11-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022054313A1 (fr) * 2020-09-14 2022-03-17 栗田工業株式会社 Agent et procédé antitartretartre et procédé de mise à l'échelle

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JPH05228494A (ja) * 1991-05-31 1993-09-07 Calgon Corp ブラックリカーエバポレーター中のスケール制御
US20070062879A1 (en) * 2003-07-23 2007-03-22 Talbot Robert E Scale inhibition in water systems
JP2010527749A (ja) * 2007-05-10 2010-08-19 ナルコ カンパニー パルプミルエバポレータおよび濃縮器中のスケール堆積をモニタリングおよび阻害する方法
JP2014195754A (ja) * 2013-03-29 2014-10-16 栗田工業株式会社 スケール防止方法及び逆浸透膜用水酸化マグネシウムスケール防止剤

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JP3194867B2 (ja) * 1996-07-09 2001-08-06 伯東株式会社 パルプ蒸解釜のスケール付着抑制剤およびスケール付着抑制方法
DE10228628A1 (de) * 2002-06-26 2004-01-22 Stockhausen Gmbh & Co. Kg Copolymerisate zur Vermeidung von Ablagerungen in wasserführenden Systemen, deren Herstellung und Verwendung
JP5272462B2 (ja) * 2008-03-17 2013-08-28 栗田工業株式会社 緑液製造系におけるスケール形成抑制剤、スケール形成抑制方法、及び緑液製造系

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Publication number Priority date Publication date Assignee Title
JPH05228494A (ja) * 1991-05-31 1993-09-07 Calgon Corp ブラックリカーエバポレーター中のスケール制御
US20070062879A1 (en) * 2003-07-23 2007-03-22 Talbot Robert E Scale inhibition in water systems
JP2010527749A (ja) * 2007-05-10 2010-08-19 ナルコ カンパニー パルプミルエバポレータおよび濃縮器中のスケール堆積をモニタリングおよび阻害する方法
JP2014195754A (ja) * 2013-03-29 2014-10-16 栗田工業株式会社 スケール防止方法及び逆浸透膜用水酸化マグネシウムスケール防止剤

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022054313A1 (fr) * 2020-09-14 2022-03-17 栗田工業株式会社 Agent et procédé antitartretartre et procédé de mise à l'échelle
JP2022047852A (ja) * 2020-09-14 2022-03-25 栗田工業株式会社 スケール防止剤およびスケール防止方法

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