JPH0859245A - Production of basic ferric sulfate solution - Google Patents
Production of basic ferric sulfate solutionInfo
- Publication number
- JPH0859245A JPH0859245A JP20081394A JP20081394A JPH0859245A JP H0859245 A JPH0859245 A JP H0859245A JP 20081394 A JP20081394 A JP 20081394A JP 20081394 A JP20081394 A JP 20081394A JP H0859245 A JPH0859245 A JP H0859245A
- Authority
- JP
- Japan
- Prior art keywords
- ferric sulfate
- basicity
- solution
- basic
- magnesium
- 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.)
- Pending
Links
- GDPKWKCLDUOTMP-UHFFFAOYSA-B iron(3+);dihydroxide;pentasulfate Chemical compound [OH-].[OH-].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GDPKWKCLDUOTMP-UHFFFAOYSA-B 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims abstract description 23
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims abstract description 23
- 239000000243 solution Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 150000002681 magnesium compounds Chemical class 0.000 claims abstract description 11
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims abstract description 5
- 239000000347 magnesium hydroxide Substances 0.000 claims abstract description 5
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims abstract description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 29
- 239000000047 product Substances 0.000 description 22
- 238000001556 precipitation Methods 0.000 description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 239000000701 coagulant Substances 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、塩基性を付与した硫
酸第２鉄溶液を製造する方法に関し、特に、水処理凝集
剤に適した塩基性硫酸第２鉄溶液を製造する方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a ferric sulfate solution having a basic property, and more particularly to a method for producing a basic ferric sulfate solution suitable for a water treatment flocculant. is there.
【０００２】[0002]
【従来の技術】従来から硫酸第２鉄は、下水道やし尿等
の水処理凝集剤として使用されており、生成フロックの
沈降速度が速く、脱臭能力を有しているという特徴を備
えている。しかしながら、硫酸第２鉄からなる凝集剤
は、凝集剤注入率の許容範囲が狭い、品質が変化しやす
い、金属に対する腐食性が強いという問題も有してい
る。2. Description of the Related Art Ferric sulfate has hitherto been used as a water treatment coagulant for sewerage and night urine, and is characterized by a high sedimentation rate of produced flocs and a deodorizing ability. However, the coagulant made of ferric sulfate has problems that the permissible range of the coagulant injection rate is narrow, the quality is likely to change, and the corrosiveness to metal is strong.
【０００３】かような問題点を解決するために、硫酸第
２鉄に塩基性を付与することが従来から行なわれてお
り、塩基性を有する硫酸第２鉄としてポリ硫酸第２鉄が
製造されている。ポリ硫酸第２鉄の製造方法としては、
硫酸第１鉄と硫酸から製造する方法（例えば特公昭５１
−１７５１６号公報）や、酸化鉄と硫酸から製造する方
法（例えば特公平２−２２０１２号公報、特公平５−１
３０９５号公報）が提案されている。In order to solve such a problem, it has been conventionally practiced to impart basicity to ferric sulfate, and polyferric sulfate is produced as ferric sulfate having basicity. ing. As a method for producing ferric polysulfate,
A method of producing from ferrous sulfate and sulfuric acid (for example, Japanese Patent Publication No. 51
No. 17516), or a method for producing from iron oxide and sulfuric acid (eg Japanese Patent Publication No. 2-22012, Japanese Patent Publication No. 5-1).
No. 3095) is proposed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、硫酸第
１鉄と硫酸からポリ硫酸第２鉄を製造する方法は、酸化
設備などに複雑な設備を必要とし、また酸化鉄と硫酸か
らポリ硫酸第２鉄を製造する方法では、原料の酸化鉄の
組成によって得られるポリ硫酸第２鉄の塩基度が左右さ
れ、さらには未反応残渣が多量に残り、品質の安定性も
満足すべきものではない。The method for producing ferric polysulfate from ferrous sulfate and sulfuric acid, however, requires complicated equipment such as oxidation equipment, and the ferric sulfate and sulfuric acid produce polysulfate second. In the method for producing iron, the basicity of the ferric polysulfate obtained depends on the composition of the raw material iron oxide, a large amount of unreacted residue remains, and the stability of quality is not satisfactory.
【０００５】そこでこの発明は、製品の品質が長期間安
定であり、塩基度を任意にかつ容易に調整でき、しかも
凝集性能も良好な塩基性硫酸第２鉄溶液の製造方法を提
供することを目的としてなされたものである。Therefore, the present invention provides a method for producing a basic ferric sulfate solution, in which the quality of the product is stable for a long period of time, the basicity can be arbitrarily and easily adjusted, and the flocculation performance is good. It was done for the purpose.
【０００６】[0006]
【課題を解決するための手段】すなわちこの発明の塩基
性硫酸第２鉄溶液の製造方法は、硫酸第２鉄水溶液にマ
グネシウム化合物からなるアルカリ剤を添加して反応さ
せることを特徴とするものである。マグネシウム化合物
としては、水酸化マグネシウム、酸化マグネシウム、炭
酸マグネシウムなどを好ましく使用することができる。That is, the method for producing a basic ferric sulfate solution according to the present invention is characterized in that an alkaline agent comprising a magnesium compound is added to an aqueous ferric sulfate solution and reacted. is there. As the magnesium compound, magnesium hydroxide, magnesium oxide, magnesium carbonate and the like can be preferably used.
【０００７】この発明における硫酸第２鉄とマグネシウ
ム化合物との反応は、マグネシウム化合物として水酸化
マグネシウムを用いた場合を例に挙げれば、次のように
なる。The reaction between ferric sulfate and a magnesium compound in the present invention is as follows, taking magnesium hydroxide as the magnesium compound as an example.
【０００８】Ｆｅ2 （ＳＯ4 ）3 ＋ n/2 Ｍｇ（Ｏ
Ｈ）2−→ Ｆｅ2 （ＯＨ）n （ＳＯ4 ）3-n/2 ＋ n/2
ＭｇＳＯ4 Fe 2 (SO 4 ) 3 + n / 2 Mg (O
H) 2- → Fe 2 (OH) n (SO 4 ) 3-n / 2 + n / 2
MgSO 4
【０００９】この発明の特徴は、硫酸第２鉄に塩基性を
付与するためのアルカリ剤としてマグネシウム化合物を
用いる点にあり、これによって、アルカリ剤としてナト
リウム、カリウム等を用いた場合に比較して、製品の長
期間にわたる安定化を達成することができたものであ
る。A feature of the present invention is that a magnesium compound is used as an alkaline agent for imparting basicity to ferric sulfate, which makes it possible to compare with the case where sodium, potassium or the like is used as the alkaline agent. The product was able to achieve long-term stabilization.
【００１０】塩基性硫酸第２鉄の塩基度は、ポリ塩化ア
ルミニウムの塩基度と同様な考え方でとらえることがで
き、塩基性硫酸第２鉄中の全Ｆｅの当量に対するＦｅに
結合しているＯＨ基の当量の割合を百分率で表したもの
として定義される。The basicity of basic ferric sulfate can be understood in the same way as the basicity of polyaluminum chloride, and the OH bonded to Fe relative to the total equivalent of Fe in basic ferric sulfate. It is defined as the equivalent ratio of groups expressed as a percentage.
【００１１】すなわち塩基性硫酸第２鉄の一般式は Ｆｅ2 （ＯＨ）n （ＳＯ4 ）3-n/2 で表わすことができ、例えば塩基度５０％の塩基性硫酸
第２鉄は以下の組成となる。 Ｆｅ2 （ＯＨ）3 （ＳＯ4 ）3-3/2 塩基度の計算は以下のようになる。 （３×ＯＨ- ／２×Ｆｅ3+）×１００＝（３／６）×１
００＝５０（％）That is, the general formula of basic ferric sulfate can be represented by Fe 2 (OH) n (SO 4 ) 3-n / 2. For example, basic ferric sulfate having a basicity of 50% is as follows. It becomes the composition. The calculation of Fe 2 (OH) 3 (SO 4 ) 3-3 / 2 basicity is as follows. (3 × OH − / 2 × Fe 3+ ) × 100 = (3/6) × 1
00 = 50 (%)
【００１２】この発明を実施するに際しては、原料であ
る硫酸第２鉄水溶液にアルカリ剤であるマグネシウム化
合物を粉状またはスラリー状として添加し、室温で十分
に撹拌混合すればよい。In carrying out the present invention, a magnesium compound as an alkaline agent may be added to the aqueous ferric sulfate solution as a raw material in the form of powder or slurry and sufficiently stirred and mixed at room temperature.
【００１３】アルカリ剤の添加量は、硫酸第２鉄中のＳ
Ｏ4 2-イオンのどの程度をＯＨ- イオンに置換するか、
換言すればどの程度の塩基度にするかによって変化す
る。すなわち所望の塩基度とするのに必要なアルカリ剤
の量を計算で求め、この計算量を添加することによっ
て、所望の塩基度をもつ塩基性硫酸第２鉄溶液を容易に
得ることができる。The amount of alkali agent added is S in ferric sulfate.
How much of O 4 2− ion is replaced with OH − ion,
In other words, it changes depending on the basicity. That is, by calculating the amount of the alkaline agent necessary to obtain the desired basicity and adding this calculated amount, a basic ferric sulfate solution having the desired basicity can be easily obtained.
【００１４】凝集剤として特に好適な塩基度は５〜２５
％の範囲である。塩基度が５％未満では凝集性能の面で
硫酸第２鉄に対して顕著な向上がみられず、一方、塩基
度が２５％を超え、特に３０％以上となると保存安定性
が悪くなる。Particularly suitable basicity as a flocculant is 5 to 25.
% Range. When the basicity is less than 5%, no remarkable improvement in ferric sulfate is observed in terms of aggregation performance. On the other hand, when the basicity exceeds 25%, particularly 30% or more, storage stability deteriorates.
【００１５】上記したようなこの発明の方法によって得
られた塩基性硫酸第２鉄溶液の製品は、沈殿析出等の経
時変化もなく安定であり、性能の劣化もない。また、凝
集性能も硫酸第２鉄溶液に比べて向上し、特に凝集剤添
加量の許容範囲について著しい向上が認められる。The product of the basic ferric sulfate solution obtained by the method of the present invention as described above is stable with no change with time such as precipitation and the like, and has no deterioration in performance. Further, the flocculation performance is also improved as compared with the ferric sulfate solution, and in particular, the remarkably improved permissible range of the coagulant addition amount is recognized.
【００１６】[0016]
【実施例】以下にこの発明を、実施例および比較例に基
づいてさらに説明する。なお、実施例、比較例中の％は
いずれも重量％を表わす。また塩基度は、ＪＩＳ Ｋ
１４７５に規定する塩基度の測定方法に準じた方法によ
り測定した。EXAMPLES The present invention will be further described below based on Examples and Comparative Examples. In the examples and comparative examples,% means% by weight. The basicity is JIS K
It was measured by a method according to the measuring method of basicity specified in 1475.
【００１７】実施例１〜５ ４５％硫酸第２鉄水溶液５００ｇを５００ｍＬ（ミリリ
ットル）容ビーカーにとり、純度１００％換算の酸化マ
グネシウムを各々３．５ｇ、７．０ｇ、１０．０ｇ、１
４．０ｇ、１７．０ｇを２０％スラリーとして、室温で
撹拌しながら３０分かけて添加し、さらに３０分撹拌を
続けて反応を完結させた。得られた各水溶液の全鉄を定
量し、各水溶液中の全鉄濃度が１０％となるように水で
希釈し、塩基度５％、１０％、１４％、２０％、２５％
を有する赤褐色の塩基性硫酸第２鉄溶液各６３０ｇを得
た（本発明品Ｎｏ．１〜Ｎｏ．５）。なお、鉄の定量は
ＪＩＳ Ｋ ８９８１準じた方法で行なった。 Examples 1 to 5 500 g of 45% ferric sulfate aqueous solution was placed in a 500 mL (ml) beaker, and 3.5 g, 7.0 g, 10.0 g and 1% of 100% pure magnesium oxide, respectively.
4.0 g and 17.0 g were added as 20% slurries over 30 minutes with stirring at room temperature, and stirring was continued for another 30 minutes to complete the reaction. The amount of total iron in each obtained aqueous solution was quantified, diluted with water so that the concentration of total iron in each aqueous solution was 10%, and the basicity was 5%, 10%, 14%, 20%, 25%.
630 g of reddish-brown basic ferric sulfate solution having each of the above was obtained (invention products No. 1 to No. 5). The amount of iron was determined by the method according to JIS K 8981.
【００１８】実施例６ 実施例１の酸化マグネシウムに代えて、水酸化マグネシ
ウム１４．５ｇを２０％スラリーとして添加した以外
は、実施例１と同様にして、塩基度１４％を有する赤褐
色の塩基性硫酸第２鉄溶液６３０ｇを得た（本発明品Ｎ
ｏ．６）。 Example 6 A reddish-brown basic substance having a basicity of 14% was obtained in the same manner as in Example 1 except that 14.5 g of magnesium hydroxide was added as a 20% slurry in place of the magnesium oxide of Example 1. 630 g of ferric sulfate solution was obtained (invention product N
o. 6).
【００１９】実施例７ 実施例１の酸化マグネシウムに代えて、炭酸マグネシウ
ム２１．０ｇを２０％スラリーとして添加した以外は、
実施例１と同様にして、塩基度１５％を有する赤褐色の
塩基性硫酸第２鉄溶液６３０ｇを得た（本発明品Ｎｏ．
７）。 Example 7 Except that 21.0 g of magnesium carbonate was added as a 20% slurry in place of the magnesium oxide of Example 1,
In the same manner as in Example 1, 630 g of a reddish brown basic ferric sulfate solution having a basicity of 15% was obtained (invention product No.
7).
【００２０】比較例１〜５ ４５％硫酸第２鉄水溶液５００ｇを５００ｍＬ容ビーカ
ーにとり、純度１００％換算の炭酸ナトリウムを各々
３．５ｇ、７．０ｇ、１１．０ｇ、１４．０ｇ、１８．
０ｇを２０％溶液として、室温で撹拌しながら３０分か
けて添加し、さらに３０分撹拌を続けて反応を完結させ
た。得られた各水溶液の全鉄を定量し、各水溶液中の全
鉄濃度が１０％となるように水で希釈し、塩基度２％、
４％、６％、８％、１０％を有する赤褐色の塩基性硫酸
第２鉄溶液各６３０ｇを得た（比較品Ｎｏ．１〜Ｎｏ．
５）。 Comparative Examples 1 to 5 500 g of 45% ferric sulfate aqueous solution was placed in a 500 mL beaker, and 3.5 g, 7.0 g, 11.0 g, 14.0 g and 18.
0 g of a 20% solution was added over 30 minutes with stirring at room temperature, and stirring was continued for another 30 minutes to complete the reaction. The amount of total iron in each obtained aqueous solution was quantified, diluted with water so that the concentration of total iron in each aqueous solution was 10%, and the basicity was 2%.
630 g each of reddish brown basic ferric sulfate solution having 4%, 6%, 8% and 10% were obtained (comparative products No. 1 to No. 1).
5).
【００２１】比較例６〜１０ ４５％硫酸第２鉄水溶液５００ｇを５００ｍＬ容ビーカ
ーにとり、純度１００％換算の炭酸カリウムを各々５．
０ｇ、９．５ｇ、１４．０ｇ、１９．０ｇ、２３．０ｇ
を２０％溶液として、室温で撹拌しながら３０分かけて
添加し、さらに３０分撹拌を続けて反応を完結させた。
得られた各水溶液の全鉄を定量し、各水溶液中の全鉄濃
度が１０％となるように水で希釈し、塩基度２％、４
％、６％、８％、１０％を有する赤褐色の塩基性硫酸第
２鉄溶液各６３０ｇを得た（比較品Ｎｏ．６〜Ｎｏ．１
０）。 Comparative Examples 6 to 10 500 g of 45% ferric sulfate aqueous solution was placed in a 500 mL beaker, and potassium carbonate of 100% purity was added to each of 5.
0g, 9.5g, 14.0g, 19.0g, 23.0g
Was added as a 20% solution over 30 minutes with stirring at room temperature, and stirring was continued for another 30 minutes to complete the reaction.
The total iron in each of the obtained aqueous solutions was quantified, diluted with water so that the total iron concentration in each aqueous solution was 10%, and the basicity was 2% and 4%.
%, 6%, 8% and 10% of reddish brown basic ferric sulfate solution 630 g each were obtained (comparative products No. 6 to No. 1).
0).
【００２２】上記で得られた本発明品Ｎｏ．１〜Ｎｏ．
７および比較品Ｎｏ．１〜Ｎｏ．１０について３カ月保
存後の安定性を調べた結果を表１に示す。保存条件は、
各試料を樹脂製容器中に密閉し室温にて保存した。表１
からわかるように、アルカリ剤としてマグネシウム化合
物を用いた本発明品は３カ月保存後においても沈殿等の
析出もなく安定であるのに対して、アルカリ剤としてナ
トリウムやカリウムを用いた比較品はＮｏ．３（塩基度
６％）、Ｎｏ．７（塩基度４％）以上の塩基度では沈殿
物を析出し変質している。The product No. of the present invention obtained above. 1-No.
7 and comparative product No. 1-No. Table 1 shows the results of examining the stability of No. 10 after storage for 3 months. The storage conditions are
Each sample was sealed in a resin container and stored at room temperature. Table 1
As can be seen, the product of the present invention using the magnesium compound as the alkali agent is stable without precipitation such as precipitation even after storage for 3 months, whereas the comparative product using sodium or potassium as the alkali agent is No. ． 3 (basicity 6%), No. At a basicity of 7 (basicity 4%) or more, a precipitate is formed and altered.
【００２３】 表 １ 本 発 明 品 比 較 品 Ｎｏ． 塩基度（％） 安定性 Ｎｏ． 塩基度（％） 安定性 １ ５ 変化なし １ ２ 変化なし ２ １０ 変化なし ２ ４ 変化なし ３ １４ 変化なし ３ ６ 沈殿析出 ４ ２０ 変化なし ４ ８ 沈殿析出 ５ ２５ 変化なし ５ １０ 沈殿析出 ６ １４ 変化なし ６ ２ 変化なし ７ １５ 変化なし ７ ４ 沈殿析出 ８ ６ 沈殿析出 ９ ８ 沈殿析出 １０ １０ 沈殿析出 Table 1 Comparison of the developed product No. Basicity (%) stability No. Basicity (%) Stability 1 5 No change 1 2 No change 2 10 No change 2 4 No change 3 14 No change 3 6 Precipitation precipitation 4 20 No change 4 8 Precipitation precipitation 5 25 No change 5 10 Precipitation precipitation 6 14 Change None 6 2 No change 7 15 No change 7 4 Precipitate precipitation 8 6 Precipitate precipitation 9 8 Precipitate precipitation 10 10 Precipitate precipitation
【００２４】実験例 上記で得られた本発明品Ｎｏ．１〜７、および対照とし
て硫酸第２鉄について、凝集剤としての凝集効果を調べ
た。被処理水として、イオン交換水に５％炭酸水素ナト
リウムを添加してｐＨ７．２とした後、カオリンを添加
して標準濁度６００度とした懸濁水を使用した。 Experimental Example The product No. of the present invention obtained as described above. The aggregation effect of 1 to 7 and ferric sulfate as a control was examined as a flocculant. As the water to be treated, suspension water was used in which 5% sodium hydrogen carbonate was added to ion-exchanged water to adjust the pH to 7.2 and then kaolin was added to adjust the standard turbidity to 600 degrees.
【００２５】この被処理水５００ｍＬを５００ｍＬ容ビ
ーカーにいれ、各凝集剤を１００ｐｐｍずつ添加した
後、急速撹拌（１００ｒｐｍ）２分間、緩速撹拌（６０
ｒｐｍ）１０分間行ない回転翼を水から引き上げた後５
分間静置し、水面下２０ｍｍの位置から上澄液１５ｍＬ
を採取して残留濁度を測定した。濁度の測定は、散乱光
・透過光方式の濁度計を使用して行なった。結果を表２
に示す。500 mL of this water to be treated was placed in a 500 mL beaker and 100 ppm of each coagulant was added, followed by rapid stirring (100 rpm) for 2 minutes and slow stirring (60
rpm) for 10 minutes and after pulling the rotor blade out of the water, 5
Let stand for 15 minutes, and from the position 20 mm below the surface of the water 15 mL of supernatant
Was collected to measure the residual turbidity. The turbidity was measured using a scattered light / transmitted light turbidimeter. Table 2 shows the results
Shown in
【００２６】表２からわかるように、本発明品によれ
ば、硫酸第２鉄に比べて残留濁度が低下し、生成したフ
ロックも大きくなっており、塩基性付与により硫酸第２
鉄の凝集性能が向上したことが認められる。As can be seen from Table 2, according to the product of the present invention, the residual turbidity is lower than that of ferric sulfate and the amount of flocs formed is also large.
It can be seen that the iron agglomeration performance is improved.
【００２７】 表 ２ フロックの大きさ 残留濁度 本発明品Ｎｏ．１ 中 １．０ 本発明品Ｎｏ．２ 大 ０．７ 本発明品Ｎｏ．３ 大 ０．６ 本発明品Ｎｏ．４ 大 ０．５ 本発明品Ｎｏ．５ 大 ０．４ 本発明品Ｎｏ．６ 大 ０．６ 本発明品Ｎｏ．７ 大 ０．６ 硫酸第２鉄 中 ２．０ Table 2 Flock size Residual turbidity Inventive product No. 1.0 out of the present invention product No. 1 2 Large 0.7 Inventive product No. 3 Large 0.6 Product No. of the present invention 4 Large 0.5 Inventive product No. 5 Large 0.4 Inventive product No. 6 Large 0.6 Inventive product No. 7 large 0.6 in ferric sulfate 2.0
【００２８】[0028]
【発明の効果】以上説明したようにこの発明によれば、
アルカリ剤としてマグネシウム化合物を用いて硫酸第２
鉄に塩基性を付与することによって、長期間安定で凝集
性能の良好な塩基性硫酸第２鉄を製造することができ
る。また、所望の塩基度を容易に付与できるため、凝集
剤として特に好適な塩基度５〜２５％の塩基性硫酸第２
鉄を効率よく、簡便に製造することができる。As described above, according to the present invention,
Sulfuric acid second using magnesium compound as alkaline agent
By imparting basicity to iron, it is possible to produce basic ferric sulfate which is stable for a long period of time and has good aggregation performance. In addition, since a desired basicity can be easily imparted, basic sulfuric acid having a basicity of 5 to 25% which is particularly suitable as a flocculant
Iron can be produced efficiently and easily.
Claims (3)
らなるアルカリ剤を添加して反応させることを特徴とす
る塩基性硫酸第２鉄溶液の製造方法。1. A method for producing a basic ferric sulfate solution, which comprises adding an alkaline agent made of a magnesium compound to an aqueous solution of ferric sulfate to react them.
ム、酸化マグネシウムまたは炭酸マグネシウムである請
求項１記載の方法。2. The method according to claim 1, wherein the magnesium compound is magnesium hydroxide, magnesium oxide or magnesium carbonate.
て、塩基度５〜２５％を有する塩基性硫酸第２鉄溶液を
製造する請求項１記載の方法。3. The method according to claim 1, wherein a basic ferric sulfate solution having a basicity of 5 to 25% is produced by adjusting the addition amount of the alkaline agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20081394A JPH0859245A (en) | 1994-08-25 | 1994-08-25 | Production of basic ferric sulfate solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20081394A JPH0859245A (en) | 1994-08-25 | 1994-08-25 | Production of basic ferric sulfate solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0859245A true JPH0859245A (en) | 1996-03-05 |
Family
ID=16430630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20081394A Pending JPH0859245A (en) | 1994-08-25 | 1994-08-25 | Production of basic ferric sulfate solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0859245A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2865726A1 (en) * | 2004-02-04 | 2005-08-05 | Holcim | Improving the flow of moist ferrous sulfate heptahydrate, e.g. useful for reducing hexavalent chromium in cement, comprises adding a powdered magnesium salt |
| FR2865727A1 (en) * | 2004-02-04 | 2005-08-05 | Holcim | Improving the flow of moist ferrous sulfate heptahydrate, e.g. useful for reducing hexavalent chromium in cement, comprises adding flyash or fumed silica |
| JP2007075697A (en) * | 2005-09-13 | 2007-03-29 | Matsuda Giken Kogyo Kk | Water purifying agent and water purification method |
| JP2010052975A (en) * | 2008-08-27 | 2010-03-11 | Nagoya Univ | Method for producing shwertmannite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643158A (en) * | 1987-06-02 | 1989-01-06 | Basf Ag | N,n'-biscyano-p-benzoquinonebisimine, charge-transfer complex compound containing same and its radical ionic salt |
| JPH0647205A (en) * | 1992-07-29 | 1994-02-22 | Tsurumi Soda Co Ltd | Production of iron base coagulant |
-
1994
- 1994-08-25 JP JP20081394A patent/JPH0859245A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643158A (en) * | 1987-06-02 | 1989-01-06 | Basf Ag | N,n'-biscyano-p-benzoquinonebisimine, charge-transfer complex compound containing same and its radical ionic salt |
| JPH0647205A (en) * | 1992-07-29 | 1994-02-22 | Tsurumi Soda Co Ltd | Production of iron base coagulant |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2865726A1 (en) * | 2004-02-04 | 2005-08-05 | Holcim | Improving the flow of moist ferrous sulfate heptahydrate, e.g. useful for reducing hexavalent chromium in cement, comprises adding a powdered magnesium salt |
| FR2865727A1 (en) * | 2004-02-04 | 2005-08-05 | Holcim | Improving the flow of moist ferrous sulfate heptahydrate, e.g. useful for reducing hexavalent chromium in cement, comprises adding flyash or fumed silica |
| EP1588985A1 (en) * | 2004-02-04 | 2005-10-26 | HOLCIM (Belgique) | Process for the fluidization of ferrous sulfate using silica-based products |
| EP1609761A1 (en) * | 2004-02-04 | 2005-12-28 | HOLCIM (Belgique) | Process for the fluidization of iron sulfates using magnesium salts |
| JP2007075697A (en) * | 2005-09-13 | 2007-03-29 | Matsuda Giken Kogyo Kk | Water purifying agent and water purification method |
| JP2010052975A (en) * | 2008-08-27 | 2010-03-11 | Nagoya Univ | Method for producing shwertmannite |
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