JP6548870B2 - Method for controlling slime in papermaking process water - Google Patents
Method for controlling slime in papermaking process water Download PDFInfo
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- JP6548870B2 JP6548870B2 JP2014091155A JP2014091155A JP6548870B2 JP 6548870 B2 JP6548870 B2 JP 6548870B2 JP 2014091155 A JP2014091155 A JP 2014091155A JP 2014091155 A JP2014091155 A JP 2014091155A JP 6548870 B2 JP6548870 B2 JP 6548870B2
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- slime
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- papermaking process
- bromine
- sulfamic acid
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- 238000000034 method Methods 0.000 title claims description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 80
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 39
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 37
- 229910052794 bromium Inorganic materials 0.000 claims description 37
- -1 sulfamic acid compound Chemical class 0.000 claims description 36
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 27
- 239000000460 chlorine Substances 0.000 claims description 27
- 229910052801 chlorine Inorganic materials 0.000 claims description 27
- 229910052736 halogen Inorganic materials 0.000 claims description 25
- 150000002367 halogens Chemical class 0.000 claims description 25
- 239000007800 oxidant agent Substances 0.000 claims description 21
- 239000007795 chemical reaction product Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 5
- 239000012298 atmosphere Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 40
- 239000003112 inhibitor Substances 0.000 description 32
- 230000001629 suppression Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000000123 paper Substances 0.000 description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 10
- 229940079593 drug Drugs 0.000 description 10
- 239000003814 drug Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 description 9
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Inorganic materials [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000004480 active ingredient Substances 0.000 description 4
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- CUILPNURFADTPE-UHFFFAOYSA-N hypobromous acid Chemical compound BrO CUILPNURFADTPE-UHFFFAOYSA-N 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 3
- 230000000844 anti-bacterial effect Effects 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- CODNYICXDISAEA-UHFFFAOYSA-N bromine monochloride Chemical compound BrCl CODNYICXDISAEA-UHFFFAOYSA-N 0.000 description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid group Chemical group S(N)(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- OGQPUOLFKIMRMF-UHFFFAOYSA-N chlorosulfamic acid Chemical compound OS(=O)(=O)NCl OGQPUOLFKIMRMF-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VYECFMCAAHMRNW-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O.NS(O)(=O)=O VYECFMCAAHMRNW-UHFFFAOYSA-N 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 159000000009 barium salts Chemical class 0.000 description 1
- BEHLMOQXOSLGHN-UHFFFAOYSA-N benzenamine sulfate Chemical group OS(=O)(=O)NC1=CC=CC=C1 BEHLMOQXOSLGHN-UHFFFAOYSA-N 0.000 description 1
- FECFIIXKXJBOSU-UHFFFAOYSA-N butylsulfamic acid Chemical group CCCCNS(O)(=O)=O FECFIIXKXJBOSU-UHFFFAOYSA-N 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001868 cobalt Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- BAQKWXACUNEBOT-UHFFFAOYSA-N dibutylsulfamic acid Chemical compound CCCCN(S(O)(=O)=O)CCCC BAQKWXACUNEBOT-UHFFFAOYSA-N 0.000 description 1
- YGNOYUCUPMACDT-UHFFFAOYSA-N dimethylsulfamic acid Chemical compound CN(C)S(O)(=O)=O YGNOYUCUPMACDT-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- XRVWREPFYXZOPK-UHFFFAOYSA-N dipropylsulfamic acid Chemical compound CCCN(S(O)(=O)=O)CCC XRVWREPFYXZOPK-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- IOISAJSHULNACL-UHFFFAOYSA-N ethyl(methyl)sulfamic acid Chemical compound CCN(C)S(O)(=O)=O IOISAJSHULNACL-UHFFFAOYSA-N 0.000 description 1
- SIVVHUQWDOGLJN-UHFFFAOYSA-N ethylsulfamic acid Chemical group CCNS(O)(=O)=O SIVVHUQWDOGLJN-UHFFFAOYSA-N 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002357 guanidines Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002696 manganese Chemical class 0.000 description 1
- YZVQGLCYZLGIAM-UHFFFAOYSA-N methyl(propyl)sulfamic acid Chemical compound CCCN(C)S(O)(=O)=O YZVQGLCYZLGIAM-UHFFFAOYSA-N 0.000 description 1
- MYMDOKBFMTVEGE-UHFFFAOYSA-N methylsulfamic acid Chemical group CNS(O)(=O)=O MYMDOKBFMTVEGE-UHFFFAOYSA-N 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 159000000001 potassium salts Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- JWQSOOZHYMZRBT-UHFFFAOYSA-N propan-2-ylsulfamic acid Chemical group CC(C)NS(O)(=O)=O JWQSOOZHYMZRBT-UHFFFAOYSA-N 0.000 description 1
- HLIBNTOXKQCYMV-UHFFFAOYSA-N propylsulfamic acid Chemical group CCCNS(O)(=O)=O HLIBNTOXKQCYMV-UHFFFAOYSA-N 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 159000000008 strontium salts Chemical class 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
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Description
本発明は、紙の製造工程における製紙工程水のスライム抑制方法に関する。 The present invention relates to a method for suppressing slime in papermaking process water in a paper manufacturing process.
紙の製造工程における製紙工程水用のスライム抑制方法としては、各種のスライム抑制剤が使用される。次亜塩素酸等の酸化系薬剤は代表的なスライム抑制剤であるが、製紙工程中で有効成分が速やかに分解し、十分な効果が得られないという問題がある。有機窒素系スライム抑制剤を用いる処理も提案されているが、各種有機窒素系スライム抑制剤は、一般的に酸化系スライム抑制剤よりも殺菌できる菌種が限定されるため、耐性菌等の影響により十分なスライム抑制効果が得られない場合がある。 Various slime inhibitors are used as a slime suppression method for papermaking process water in the paper manufacturing process. Oxidizing agents such as hypochlorous acid are typical slime inhibitors, but there is a problem that the active ingredient is rapidly decomposed in the papermaking process and a sufficient effect can not be obtained. Treatment using an organic nitrogen slime inhibitor has also been proposed, but various organic nitrogen slime inhibitors generally limit the types of bacteria that can be sterilized more than oxidized slime inhibitors. In some cases, a sufficient slime suppression effect can not be obtained.
酸化剤とアミン源を現場で混合して生成した結合ハロゲン系薬剤によるスライム抑制方法も提案されているが（例えば、特許文献１参照）、これらの方法は現場で複数の薬注タンクが必要であることや、注入管理が煩雑であるという問題がある。 Although slime suppression methods have also been proposed by combined halogen-based drugs generated by mixing oxidants and amine sources in situ (see, for example, Patent Document 1), these methods require multiple dosing tanks in the field. There is a problem that it is complicated and injection management is complicated.
安定化臭素溶液を製紙工程水用のスライム抑制剤として使用することが提案されているが（特許文献２参照）、詳細な注入条件については記載されていない。 It has been proposed to use a stabilized bromine solution as a slime inhibitor for papermaking process water (see Patent Document 2), but detailed injection conditions are not described.
製紙工程水に酸化系等のスライム抑制剤を間欠的に添加してスライムコントロールを行う場合、製紙工程水の水質によりスライム抑制剤の消費濃度が大きく異なるため、初期のスライム抑制剤の添加量とスライム抑制効果は相関しない場合が多い。また、安定化次亜臭素酸は、過剰に添加されると、系内の金属部分への腐食リスクを高めるというデメリットもある。 When performing slime control by intermittently adding a slime inhibitor such as an oxidation system to the papermaking process water, the consumption concentration of the slime inhibitor largely varies depending on the water quality of the papermaking process water, so the initial amount of the slime inhibitor added and Slime suppression effects are often uncorrelated. In addition, stabilized hypobromous acid has the disadvantage of increasing the risk of corrosion to metal parts in the system when added in excess.
本発明の目的は、製紙工程水におけるスライムコントロールにおいて、十分なスライム抑制効果を有しながら、簡便に注入することができる製紙工程水のスライム抑制方法を提供することにある。 An object of the present invention is to provide a method for controlling slime in papermaking process water which can be simply injected while having a sufficient slime suppressing effect in slime control in papermaking process water.
本発明は、製紙工程水中に、臭素系酸化剤とスルファミン酸化合物との反応生成物を間欠的に添加して残留有効ハロゲン濃度が有効塩素換算で１．５ｍｇ／Ｌ以上の濃度を少なくとも１時間保持するようにし、かつ、１時間後の残留有効ハロゲン濃度が有効塩素換算で３．０〜８．０ｍｇ／Ｌとなるようにする製紙工程水のスライム抑制方法である。 In the present invention, the reaction product of a bromine-based oxidizing agent and a sulfamic acid compound is intermittently added to the papermaking process water, and the residual effective halogen concentration is at least 1.5 mg / L in effective chlorine conversion for at least one hour. This method is a method for suppressing slime in papermaking process water, in which the effective residual halogen concentration after one hour is maintained to be 3.0 to 8.0 mg / L in terms of effective chlorine, while maintaining the concentration.
また、前記製紙工程水のスライム抑制方法において、水、アルカリおよびスルファミン酸化合物を含む混合液に臭素を不活性ガス雰囲気下で添加して反応させて得られた、臭素系酸化剤とスルファミン酸化合物との反応生成物を用いることが好ましい。 Further, in the method for suppressing slime in the paper making process water, a bromine-based oxidizing agent and a sulfamic acid compound obtained by adding bromine to a mixed solution containing water, an alkali and a sulfamic acid compound under an inert gas atmosphere and reacting them. It is preferable to use the reaction product of
本発明では、製紙工程水におけるスライムコントロールにおいて、十分なスライム抑制効果を有しながら、簡便に注入することができる製紙工程水のスライム抑制方法を提供することができる。 In the present invention, a slime control method for papermaking process water can be provided which can be simply injected while having a sufficient slime suppression effect in slime control in papermaking process water.
本発明の実施の形態について以下説明する。本実施形態は本発明を実施する一例であって、本発明は本実施形態に限定されるものではない。 Embodiments of the present invention will be described below. The present embodiment is an example for implementing the present invention, and the present invention is not limited to the present embodiment.
本発明の実施形態に係る製紙工程水のスライム抑制方法は、製紙工程水中に「臭素系酸化剤とスルファミン酸化合物との反応生成物」である次亜臭素酸安定化組成物を、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように添加する方法である。 The method for suppressing slime in a papermaking process water according to an embodiment of the present invention comprises, after one hour, a hypobromous acid-stabilizing composition which is a "reaction product of a bromine-based oxidizing agent and a sulfamic acid compound" in the papermaking process water. It is the method of adding so that the residual effective halogen concentration of may become 1.5-8.0 mg / L in effective chlorine conversion.
具体的には、本発明の実施形態に係る製紙工程水のスライム抑制方法は、製紙工程水中に、例えば、「臭素とスルファミン酸化合物との反応生成物」、「次亜臭素酸とスルファミン酸化合物との反応生成物」または「塩化臭素とスルファミン酸化合物との反応生成物」を、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように添加する方法である。 Specifically, the method for suppressing slime in papermaking process water according to an embodiment of the present invention includes, for example, “reaction product of bromine and sulfamic acid compound”, “hypobromous acid and sulfamic acid compound,” in papermaking process water Product of “reaction product with” or “reaction product of bromine chloride and sulfamic acid compound” so that the remaining effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine It is a method.
上記の通り、製紙工程水に酸化系等のスライム抑制剤を間欠的に添加してスライムコントロールを行う場合、製紙工程水の水質によりスライム抑制剤の消費濃度が大きく異なるため、初期のスライム抑制剤の添加量とスライム抑制効果は相関しない場合が多いが、本発明者らは、スライム抑制剤を添加してから「所定時間経過後の残留有効ハロゲン濃度」の方がスライム抑制効果にはより相関性があることを見出し、本発明に至った。 As described above, when performing slime control by intermittently adding a slime inhibitor such as an oxidation system to the papermaking process water, the consumption concentration of the slime inhibitor largely varies depending on the water quality of the papermaking process water, so the initial slime inhibitor In many cases, the slime suppression effect does not correlate with the amount of the added lime, but the inventors found that the "remaining effective halogen concentration after a predetermined time has elapsed" is more correlated to the slime suppression effect after the slime inhibitor is added. It discovered that there was sex, and came to the present invention.
本実施形態に係る製紙工程水のスライム抑制方法により、高いスライム抑制効果を有しながら、簡便な注入方法により、製紙工程水におけるスライム抑制処理が可能となる。製紙工程水用のスライム抑制剤として、反応性と安定性のバランスが適した、結合臭素系スライム抑制剤を一液剤として使用することができる。従来の二薬剤を現場で混合する等の煩雑な操作が不要である。 The slime suppression method of papermaking process water according to the present embodiment enables slime suppression processing in papermaking process water by a simple injection method while having a high slime suppression effect. As a slime inhibitor for papermaking process water, a combined brominated slime inhibitor can be used as a one-component agent, the balance between reactivity and stability being suitable. There is no need for complicated operations such as mixing two conventional medicines on site.
本実施形態に係る製紙工程水のスライム抑制方法は、次亜塩素酸等の一般的な酸化剤と比較すると、有効成分の安定性が高く、製紙工程水中の有機物等による無効消費が少ないため、より効率的にスライムを抑制することが可能である。 The method for suppressing slime in the papermaking process water according to the present embodiment is higher in stability of the active ingredient and less ineffective consumption by organic matter and the like in the papermaking process water as compared with a general oxidizing agent such as hypochlorous acid. It is possible to suppress slime more efficiently.
本実施形態に係る製紙工程水のスライム抑制方法は、クロロスルファミン酸等の結合塩素系スライム抑制剤を使用する方法と比較すると、スライム抑制力が高いため、低い薬剤注入濃度で処理可能である。また、本実施形態に係る製紙工程水のスライム抑制方法では、適切な条件で注入するため、費用対効果を最適化することができる。さらに、系内の金属部分の腐食を抑制することができる。 The slime suppression method of papermaking process water according to the present embodiment can be processed at a low drug injection concentration because it has a higher slime suppression power as compared with the method using a combined chlorine slime inhibitor such as chlorosulfamic acid. Moreover, in the slime suppression method of the papermaking process water which concerns on this embodiment, since it injects on appropriate conditions, cost-effectiveness can be optimized. Furthermore, corrosion of metal parts in the system can be suppressed.
例えば、製紙工程水中に、「臭素系酸化剤とスルファミン酸化合物との反応生成物」を薬注ポンプ等の添加手段により添加すればよい。 For example, “the reaction product of a bromine-based oxidizing agent and a sulfamic acid compound” may be added to the papermaking process water by an addition means such as a chemical pump.
「臭素系酸化剤とスルファミン酸化合物との反応生成物」は、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように製紙工程水中に添加するが、３．０〜８．０ｍｇ／Ｌとなるように添加することが好ましい。スライム抑制剤を添加してから１時間後の残留有効ハロゲン濃度が、有効塩素換算で１．５ｍｇ／Ｌ未満であると十分なスライム抑制効果を得ることができず、８．０ｍｇ／Ｌより多い場合は、経済的に非効率であり、また配管等の腐食を引き起こす可能性がある。処理対象の製紙工程水の性状に応じて、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるようにスライム抑制剤の添加量を調整すればよい。なお、「臭素系酸化剤とスルファミン酸化合物との反応生成物を、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように添加する」とは、「臭素系酸化剤とスルファミン酸化合物との反応生成物」を製紙工程水中に添加して、残留有効ハロゲン濃度が有効塩素換算で１．５ｍｇ／Ｌ以上の濃度を少なくとも１時間保持するようにし、かつ、１時間後の残留有効ハロゲン濃度を有効塩素換算で１．５〜８．０ｍｇ／Ｌの範囲となるようにすることを意味する。また、「臭素系酸化剤とスルファミン酸化合物との反応生成物」は、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように製紙工程水中に間欠的に添加されることが好ましい。 "A reaction product of a bromine-based oxidizing agent and a sulfamic acid compound" is added to the paper-making process water so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine. And preferably 3.0 to 8.0 mg / L. If the residual effective halogen concentration one hour after the addition of the slime inhibitor is less than 1.5 mg / L in terms of effective chlorine, a sufficient slime suppression effect can not be obtained, and it is more than 8.0 mg / L If it is economically inefficient, it may also cause corrosion of piping etc. The addition amount of the slime inhibitor may be adjusted so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine according to the properties of the papermaking process water to be treated. Note that "the reaction product of a bromine-based oxidizing agent and a sulfamic acid compound is added so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine" Add a “reaction product of a bromine-based oxidizing agent and a sulfamic acid compound” to the paper-making process water so that the residual effective halogen concentration maintains a concentration of 1.5 mg / L or more in terms of effective chlorine for at least 1 hour, Also, it means that the residual effective halogen concentration after 1 hour is in the range of 1.5 to 8.0 mg / L in terms of effective chlorine. In addition, “the reaction product of a bromine-based oxidizing agent and a sulfamic acid compound” is intermittent in the water of the paper making process so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine. Is preferably added.
製紙工程水用に用いるスライム抑制剤が「塩素系酸化剤およびスルファミン酸化合物」または「塩素系酸化剤とスルファミン酸化合物との反応生成物」である場合、安定性は高いがスライム抑制効果が低いため、１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように製紙工程水に間欠的に添加されても、十分な効果を得ることができない。 When the slime inhibitor used for papermaking process water is "chlorinated oxidant and sulfamic acid compound" or "reaction product of chlorinated oxidant and sulfamic acid compound", the stability is high but the slime suppression effect is low Therefore, even if it is intermittently added to the papermaking process water so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine, a sufficient effect can not be obtained.
「臭素系酸化剤」の当量に対する「スルファミン酸化合物」の当量の比は、１以上であることが好ましく、１以上２以下の範囲であることがより好ましい。「臭素系酸化剤」の当量に対する「スルファミン酸化合物」の当量の比が１未満であると、十分な有効成分の安定性が得られないとともに、製紙工程水中の有機物等によりスライム抑制剤が消費され、スライム抑制効果が低下してしまう可能性があり、２を超えると、製造コストが増加する場合がある。 The ratio of the equivalent of the “sulfamic acid compound” to the equivalent of the “bromine-based oxidizing agent” is preferably 1 or more, and more preferably 1 or more and 2 or less. When the ratio of the equivalent of the "sulfamic acid compound" to the equivalent of the "bromine-based oxidizing agent" is less than 1, sufficient stability of the active ingredient can not be obtained, and the slime inhibitor is consumed by the organic matter in the papermaking process water There is a possibility that the slime suppressing effect may be reduced, and if it exceeds 2, the manufacturing cost may increase.
臭素系酸化剤としては、臭素（液体臭素）、塩化臭素、次亜臭素酸、臭素酸、臭素酸塩等が挙げられる。 Bromine-based oxidizing agents include bromine (liquid bromine), bromine chloride, hypobromous acid, bromate, bromate and the like.
これらのうち、臭素を用いた「臭素とスルファミン酸化合物との反応生成物」の製剤は、「次亜臭素酸とスルファミン酸」の製剤および「塩化臭素とスルファミン酸」の製剤等に比べて、十分な有効成分の安定性や殺菌効果が得られるため、製紙工程水用のスライム抑制剤としてはより好ましい。 Among these, the preparation of "the reaction product of bromine and a sulfamic acid compound" using bromine is more comparable to the preparation of "hypobromous acid and sulfamic acid" and the preparation of "bromine chloride and sulfamic acid", etc. It is more preferable as a slime inhibitor for papermaking process water because sufficient stability of the active ingredient and bactericidal effect can be obtained.
スルファミン酸化合物は、以下の一般式（１）で示される化合物である。
Ｒ２ＮＳＯ３Ｈ （１）
（式中、Ｒは独立して水素原子または炭素数１〜８のアルキル基である。）
The sulfamic acid compound is a compound represented by the following general formula (1).
R 2 NSO 3 H (1)
(Wherein, R is independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms)
スルファミン酸化合物としては、例えば、２個のＲ基の両方が水素原子であるスルファミン酸（アミド硫酸）の他に、Ｎ−メチルスルファミン酸、Ｎ−エチルスルファミン酸、Ｎ−プロピルスルファミン酸、Ｎ−イソプロピルスルファミン酸、Ｎ−ブチルスルファミン酸等の２個のＲ基の一方が水素原子であり、他方が炭素数１〜８のアルキル基であるスルファミン酸化合物、Ｎ，Ｎ−ジメチルスルファミン酸、Ｎ，Ｎ−ジエチルスルファミン酸、Ｎ，Ｎ−ジプロピルスルファミン酸、Ｎ，Ｎ−ジブチルスルファミン酸、Ｎ−メチル−Ｎ−エチルスルファミン酸、Ｎ−メチル−Ｎ−プロピルスルファミン酸等の２個のＲ基の両方が炭素数１〜８のアルキル基であるスルファミン酸化合物、Ｎ−フェニルスルファミン酸等の２個のＲ基の一方が水素原子であり、他方が炭素数６〜１０のアリール基であるスルファミン酸化合物、またはこれらの塩等が挙げられる。スルファミン酸塩としては、例えば、ナトリウム塩、カリウム塩等のアルカリ金属塩、カルシウム塩、ストロンチウム塩、バリウム塩等のアルカリ土類金属塩、マンガン塩、銅塩、亜鉛塩、鉄塩、コバルト塩、ニッケル塩等の他の金属塩、アンモニウム塩およびグアニジン塩等が挙げられる。スルファミン酸化合物およびこれらの塩は、１種を単独で用いても、２種以上を組み合わせて用いてもよい。スルファミン酸化合物としては、環境負荷等の点から、スルファミン酸（アミド硫酸）を用いるのが好ましい。 As a sulfamic acid compound, for example, in addition to sulfamic acid (amidosulfuric acid) in which both of two R groups are hydrogen atoms, N-methylsulfamic acid, N-ethylsulfamic acid, N-propylsulfamic acid, N- A sulfamic acid compound in which one of two R groups such as isopropyl sulfamic acid and N-butyl sulfamic acid is a hydrogen atom and the other is an alkyl group having 1 to 8 carbon atoms, N, N-dimethyl sulfamic acid, N, Two R groups such as N-diethylsulfamic acid, N, N-dipropylsulfamic acid, N, N-dibutylsulfamic acid, N-methyl-N-ethylsulfamic acid, N-methyl-N-propylsulfamic acid, etc. One of two R groups such as sulfamic acid compounds and N-phenylsulfamic acid, both of which are alkyl groups of 1 to 8 carbon atoms An atom, the other is sulfamic acid compound or a salt thereof, such as an aryl group having 6 to 10 carbon atoms. Examples of sulfamate salts include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as calcium salts, strontium salts and barium salts, manganese salts, copper salts, zinc salts, iron salts, cobalt salts, Other metal salts such as nickel salts, ammonium salts and guanidine salts can be mentioned. The sulfamic acid compounds and their salts may be used alone or in combination of two or more. As the sulfamic acid compound, sulfamic acid (amidosulfuric acid) is preferably used from the viewpoint of environmental load and the like.
本実施形態に係る製紙工程水のスライム抑制方法において、さらにアルカリを存在させてもよい。アルカリとしては、水酸化ナトリウム、水酸化カリウム等の水酸化アルカリ等が挙げられる。低温時の製品安定性等の点から、水酸化ナトリウムと水酸化カリウムとを併用してもよい。また、アルカリは、固形でなく、水溶液として用いてもよい。 In the method for suppressing slime in the papermaking process water according to the present embodiment, an alkali may further be present. Examples of the alkali include alkali hydroxides such as sodium hydroxide and potassium hydroxide. Sodium hydroxide and potassium hydroxide may be used in combination from the viewpoint of product stability at low temperature and the like. Further, the alkali is not solid but may be used as an aqueous solution.
紙の製造工程における製紙工程水は、パルプ化工程、抄紙工程、塗工工程等で使用される水であり、例えば、抄紙工程で循環使用される白水等が挙げられる。製紙工程水には、通常、セルロースやリグニン等の有機成分等が含まれる。 The paper making process water in the paper manufacturing process is water used in a pulping process, a paper making process, a coating process and the like, and examples thereof include white water used in circulation in the paper making process. Papermaking process water usually contains organic components such as cellulose and lignin.
＜製紙工程水用スライム抑制剤組成物＞
本実施形態に係る製紙工程水用スライム抑制剤組成物は、「臭素系酸化剤とスルファミン酸化合物との反応生成物」を含有するものであり、さらにアルカリを含有してもよい。
<Slime inhibitor composition for papermaking process water>
The slime inhibitor composition for papermaking process water according to the present embodiment contains "a reaction product of a bromine-based oxidizing agent and a sulfamic acid compound", and may further contain an alkali.
臭素系酸化剤およびスルファミン酸化合物については、上述した通りである。 The bromine-based oxidizing agent and the sulfamic acid compound are as described above.
本実施形態に係る製紙工程水用スライム抑制剤組成物は、クロロスルファミン酸等の結合塩素系スライム抑制剤と比較すると、酸化力が高く、スライム抑制力、スライム剥離力が著しく高い。 The slime inhibitor composition for papermaking process water according to the present embodiment has a high oxidizing power and a remarkably high slime suppressing power and slime peeling power as compared with a combined chlorine slime inhibitor such as chlorosulfamic acid.
本実施形態に係る製紙工程水用スライム抑制剤組成物は、次亜塩素酸等と同様に現場で濃度を測定することができるため、より正確な濃度管理が可能である。 Since the concentration of the slime inhibitor composition for papermaking process water according to the present embodiment can be measured on site in the same manner as hypochlorous acid and the like, more accurate concentration management is possible.
組成物のｐＨは、例えば、１３．０超であり、１３．２超であることがより好ましい。組成物のｐＨが１３．０以下であると組成物中の有効ハロゲンが不安定になる場合がある。 The pH of the composition is, for example, more than 13.0, more preferably more than 13.2. When the pH of the composition is 13.0 or less, the effective halogen in the composition may become unstable.
製紙工程水用スライム抑制剤組成物中の臭素酸濃度は、５ｍｇ／ｋｇ未満であることが好ましい。製紙工程水用スライム抑制剤組成物中の臭素酸濃度が５ｍｇ／ｋｇ以上であると、処理水中の臭素酸濃度が高くなる場合がある。 The bromate concentration in the slime inhibitor composition for papermaking process water is preferably less than 5 mg / kg. When the concentration of bromate in the slime inhibitor composition for paper making process water is 5 mg / kg or more, the concentration of bromate in treated water may be high.
＜製紙工程水用スライム抑制剤組成物の製造方法＞
本実施形態に係る製紙工程水用スライム抑制剤組成物は、臭素系酸化剤とスルファミン酸化合物とを混合することにより得られ、さらにアルカリを混合してもよい。
<Method of producing slime inhibitor composition for paper making process water>
The slime inhibitor composition for paper making process water according to the present embodiment is obtained by mixing a bromine-based oxidizing agent and a sulfamic acid compound, and may further be mixed with an alkali.
臭素と、スルファミン酸化合物とを含有する製紙工程水用スライム抑制剤組成物、または、臭素とスルファミン酸化合物との反応生成物を含有する製紙工程水用スライム抑制剤組成物の製造方法としては、水、アルカリおよびスルファミン酸化合物を含む混合液に臭素を不活性ガス雰囲気下で添加して反応させる工程を含むことが好ましい。不活性ガス雰囲気下で添加して反応させることにより、組成物中の臭素酸イオン濃度が低くなり、処理水中の臭素酸イオン濃度が低くなる抑えられることから好ましい。 As a method for producing a slime inhibitor composition for papermaking process water containing a reaction product of a slime inhibitor composition for papermaking process water containing bromine and a sulfamic acid compound or a reaction product of bromine and a sulfamic acid compound, It is preferable to include a step of adding bromine to a mixed solution containing water, an alkali and a sulfamic acid compound under an inert gas atmosphere to cause a reaction. By adding and reacting under an inert gas atmosphere, it is preferable because the bromate ion concentration in the composition is lowered and the bromate ion concentration in the treated water is suppressed to be low.
用いる不活性ガスとしては限定されないが、製造等の面から窒素およびアルゴンのうち少なくとも１つが好ましく、特に製造コスト等の面から窒素が好ましい。 Used but are not limited to inert gas, at least one and preferably one in terms of nitrogen and argon, such as production, nitrogen is particularly preferred from the viewpoint of production cost and the like.
臭素の添加の際の反応器内の酸素濃度は６％以下が好ましいが、４％以下がより好ましく、２％以下がさらに好ましく、１％以下が特に好ましい。臭素の反応の際の反応器内の酸素濃度が６％を超えると、反応系内の臭素酸の生成量が増加する場合がある。 The oxygen concentration in the reactor at the time of addition of bromine is preferably 6% or less, more preferably 4% or less, still more preferably 2% or less, and particularly preferably 1% or less. If the oxygen concentration in the reactor during the reaction of bromine exceeds 6%, the amount of bromic acid produced in the reaction system may increase.
臭素の添加率は、組成物全体の量に対して２５重量％以下であることが好ましく、１重量％以上２０重量％以下であることがより好ましい。臭素の添加率が組成物全体の量に対して２５重量％を超えると、反応系内の臭素酸の生成量が増加する場合がある。１重量％未満であると、殺菌力が劣る場合がある。 The addition rate of bromine is preferably 25% by weight or less based on the total amount of the composition, and more preferably 1% by weight or more and 20% by weight or less. If the addition rate of bromine exceeds 25% by weight with respect to the total amount of the composition, the amount of bromic acid produced in the reaction system may increase. When it is less than 1% by weight, the bactericidal activity may be poor.
臭素添加の際の反応温度は、０℃以上２５℃以下の範囲に制御することが好ましいが、製造コスト等の面から、０℃以上１５℃以下の範囲に制御することがより好ましい。臭素添加の際の反応温度が２５℃を超えると、反応系内の臭素酸の生成量が増加する場合があり、０℃未満であると、凍結する場合がある。 The reaction temperature at the time of bromine addition is preferably controlled in the range of 0 ° C. or more and 25 ° C. or less, but is more preferably controlled in the range of 0 ° C. or more and 15 ° C. or less from the viewpoint of production cost. When the reaction temperature at the time of bromine addition exceeds 25 ° C., the amount of bromic acid produced in the reaction system may increase, and when it is less than 0 ° C., freezing may occur.
以下、実施例および比較例を挙げ、本発明をより具体的に詳細に説明するが、本発明は、以下の実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited to the following examples.
実機の製紙工程水における殺菌効果と有効ハロゲン残留率について比較した。 The bactericidal effect and the effective residual rate of halogen in the papermaking process water of a real machine were compared.
＜実施例１＞
［組成物の調製］
（組成物１）
窒素雰囲気下で、液体臭素：１６．９重量％（ｗｔ％）、スルファミン酸：１０．７重量％、水酸化ナトリウム：１２．９重量％、水酸化カリウム：３．９４重量％、水：残分を混合して、組成物を調製した。組成物のｐＨは１４、有効ハロゲン濃度（有効塩素換算濃度）は７．５重量％であった。実施例１の組成物の詳細な調製方法は以下の通りである。
Example 1
[Preparation of composition]
(Composition 1)
Liquid nitrogen: 16.9 wt% (wt%), sulfamic acid: 10.7 wt%, sodium hydroxide: 12.9 wt%, potassium hydroxide: 3.94 wt%, water under a nitrogen atmosphere The ingredients were mixed to prepare a composition. The pH of the composition was 14, and the effective halogen concentration (effective chlorine equivalent concentration) was 7.5% by weight. The detailed preparation method of the composition of Example 1 is as follows.
反応容器内の酸素濃度が１％に維持されるように、窒素ガスの流量をマスフローコントローラでコントロールしながら連続注入で封入した２Ｌの４つ口フラスコに１４３６ｇの水、３６１ｇの水酸化ナトリウムを加え混合し、次いで３００ｇのスルファミン酸を加え混合した後、反応液の温度が０〜１５℃になるように冷却を維持しながら、４７３ｇの液体臭素を加え、さらに４８％水酸化カリウム溶液２３０ｇを加え、組成物全体の量に対する重量比でスルファミン酸１０．７％、臭素１６．９％、臭素の当量に対するスルファミン酸の当量比が１．０４である、目的の組成物を得た。生じた溶液のｐＨは、ガラス電極法にて測定したところ、１４であった。生じた溶液の臭素含有率は、臭素をヨウ化カリウムによりヨウ素に転換後、チオ硫酸ナトリウムを用いて酸化還元滴定する方法により測定したところ１６．９％であり、理論含有率（１６．９％）の１００．０％であった。また、臭素反応の際の反応容器内の酸素濃度は、株式会社ジコー製の「酸素モニタＪＫＯ−０２ ＬＪＤＩＩ」を用いて測定した。なお、臭素酸濃度は、５ｍｇ／ｋｇ未満であった。 Add 1436 g of water, 361 g of sodium hydroxide to a 2-liter 4-neck flask sealed by continuous injection while controlling the flow rate of nitrogen gas with a mass flow controller so that the oxygen concentration in the reaction vessel is maintained at 1% Mix, then add 300 g of sulfamic acid and mix, then add 473 g of liquid bromine while maintaining cooling so that the temperature of the reaction solution becomes 0 to 15 ° C., and then add 230 g of 48% potassium hydroxide solution An objective composition was obtained in which the ratio by weight of the total composition was 10.7% sulfamic acid, 16.9% bromine, and the equivalent ratio of sulfamic acid to equivalent of bromine was 1.04. The pH of the resulting solution was 14 as measured by the glass electrode method. The bromine content of the resulting solution is 16.9% as determined by a redox titration method using sodium thiosulfate after converting bromine to iodine with potassium iodide, and the theoretical content (16.9% 100.0% of the Moreover, the oxygen concentration in the reaction container in the case of a bromine reaction was measured using "oxygen monitor JKO-02 LJDII" made by Dicor Corporation. The bromate concentration was less than 5 mg / kg.
（組成物２）
１２％次亜塩素酸ナトリウム水溶液：５０重量％、スルファミン酸：１６重量％、水酸化ナトリウム：８重量％、水：残分を混合して、組成物を調製した。組成物のｐＨは１４、有効ハロゲン濃度（有効塩素換算濃度）は６．０重量％であった。
(Composition 2)
A composition was prepared by mixing a 12% aqueous solution of sodium hypochlorite: 50% by weight, sulfamic acid: 16% by weight, sodium hydroxide: 8% by weight, water: balance. The pH of the composition was 14, and the effective halogen concentration (effective chlorine equivalent concentration) was 6.0% by weight.
（組成物３）
組成物３として、１２％次亜塩素酸ナトリウム水溶液を用いた。
(Composition 3)
As composition 3, a 12% aqueous solution of sodium hypochlorite was used.
＜実施例１、参考例２、比較例１，２＞
［殺菌力の比較］
以下の条件で、製紙工程水に組成物１，２を添加して、酸化力を比較した。
（試験条件）
試験水：板紙製造工場抄紙工程における白水。一般細菌数：１０５ＣＦＵ／ｍＬ
薬剤：組成物１，２
薬剤添加濃度：有効ハロゲン濃度（有効塩素換算濃度）として組成物１を１０ｍｇ／Ｌ（比較例１）、３０ｍｇ／Ｌ（参考例２）、５０ｍｇ／Ｌ（実施例１）、組成物２を５０ｍｇ／Ｌ（比較例２）添加
試験時間：１時間
有効塩素濃度の測定方法：残留塩素測定装置（Ｈａｃｈ社製、「ＤＲ−４０００」）を使用してＤＰＤ法により測定
菌数測定方法：薬剤添加後１ｈの一般細菌数を菌数測定キット（三愛石油製、バイオチェッカーＴＴＣ）を使用して測定
<Example 1 , Reference Example 2, Comparative Examples 1 and 2>
[Comparison of sterilization ability]
Compositions 1 and 2 were added to the papermaking process water under the following conditions, and their oxidizing powers were compared.
(Test conditions)
Test water: White water in the papermaking process of a paperboard manufacturing plant. General bacteria count: 10 5 CFU / mL
Drug: Composition 1, 2
Drug addition concentration: 10 mg / L (comparative example 1), 30 mg / L ( reference example 2), 50 mg / L (example 1) and 50 mg of composition 2 as effective halogen concentration (effective chlorine equivalent concentration) / L (comparative example 2) addition Test time: 1 hour Method of measuring effective chlorine concentration: Measurement by DPD method using residual chlorine measuring device (manufactured by Hach, "DR-4000") Method of measuring number of bacteria: Addition of drug After 1 h general bacteria count is measured using the bacteria count measurement kit (Sanai oil, Bio Checker TTC)
（結果）
＜実施例３、比較例３、参考例＞
以下の条件で、下記試験水に組成物１を添加して、腐食性を比較した。
［腐食性の比較］
（試験条件）
試験水：相模原市水３倍濃縮水
試験水温：３５℃
試験期間：７日
薬剤：組成物１
薬剤添加濃度：有効ハロゲン濃度（有効塩素換算濃度）として０ｍｇ／Ｌ（参考例）、８ｍｇ／Ｌ（実施例３）、１１ｍｇ／Ｌ（比較例３）添加
金属試験片：炭素鋼
評価方法：所定濃度の薬剤を添加した試験水に、金属試験片を回転させながら浸漬し、７日後に引き上げ、金属試験片の減重量を測定することで、腐食速度（ｍｄｄ＝ｍｇ／ｄｍ３／ｄａｙ）を算出する
Example 3, Comparative Example 3, Reference Example
The composition 1 was added to the following test water under the following conditions to compare corrosiveness.
[Corrosion comparison]
(Test conditions)
Test water: Sagamihara City water 3 times concentrated water Test water temperature: 35 ° C
Test period: 7 days Drug: Composition 1
Drug addition concentration: 0 mg / L (reference example), 8 mg / L (example 3), 11 mg / L (comparative example 3) addition as the effective halogen concentration (effective chlorine conversion concentration) Metal test piece: carbon steel Evaluation method: specified The metal test piece is immersed while rotating in the test water to which the concentration of the drug is added, and pulled up after 7 days, and the corrosion rate (mdd = mg / dm 3 / day) is measured by measuring the weight reduction of the metal test piece. calculate
（結果）
＜実施例４、比較例４＞
以下の条件で、製紙工程水に組成物１，３を添加して、有効ハロゲンの残留率を比較した。
Example 4, Comparative Example 4
Compositions 1 and 3 were added to the papermaking process water under the following conditions to compare the residual ratio of effective halogen.
［有効ハロゲンの残留率の比較］
（試験条件）
試験水：板紙製造工場抄紙工程における白水
薬剤：組成物１（実施例４）、組成物３（比較例４）
試験時間：１ｈ
評価方法：試験水に各種薬剤を有効塩素濃度として５０ｍｇ／Ｌ添加し、所定時間後の有効塩素残留率を測定
有効塩素濃度の測定方法：残留塩素測定装置（Ｈａｃｈ社製、「ＤＲ−４０００」）を使用してＤＰＤ法により測定
[Comparison of residual ratio of effective halogen]
(Test conditions)
Test water: White water in papermaking process of paperboard manufacturing plant Drugs: Composition 1 (Example 4), Composition 3 (Comparative Example 4)
Test time: 1 h
Evaluation method: Add 50 mg / L of various chemicals to test water as effective chlorine concentration and measure the effective chlorine residual rate after a predetermined time Method of measuring effective chlorine concentration: Residual chlorine measuring device (made by Hach, "DR-4000" Measured by DPD method using
（結果）
このように、実施例の組成物を、製紙工程水中に１時間後の残留有効ハロゲン濃度が有効塩素換算で１．５〜８．０ｍｇ／Ｌとなるように添加することにより、製紙工程水におけるスライムコントロールにおいて、十分なスライム抑制効果を有しながら、簡便に注入することができた。 Thus, in the papermaking process water, the composition of the example is added to the papermaking process water so that the residual effective halogen concentration after 1 hour becomes 1.5 to 8.0 mg / L in terms of effective chlorine. In slime control, it could be conveniently injected while having sufficient slime suppression effect.
Claims (2)
水、アルカリおよびスルファミン酸化合物を含む混合液に臭素を不活性ガス雰囲気下で添加して反応させて得られた、臭素系酸化剤とスルファミン酸化合物との反応生成物を用いることを特徴とする製紙工程水のスライム抑制方法。 The method for suppressing slime in papermaking process water according to claim 1, wherein
It is characterized by using a reaction product of a bromine-based oxidizing agent and a sulfamic acid compound which is obtained by adding bromine to a mixed solution containing water, an alkali and a sulfamic acid compound under an inert gas atmosphere and causing a reaction. Method of controlling slime in papermaking process water.
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