JPH0471682A - Method for recovering monobasic acid - Google Patents
Method for recovering monobasic acidInfo
- Publication number
- JPH0471682A JPH0471682A JP18406190A JP18406190A JPH0471682A JP H0471682 A JPH0471682 A JP H0471682A JP 18406190 A JP18406190 A JP 18406190A JP 18406190 A JP18406190 A JP 18406190A JP H0471682 A JPH0471682 A JP H0471682A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- recovered
- nitrate
- recovering
- monovalent
- 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
- 239000002253 acid Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 15
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 10
- 238000000502 dialysis Methods 0.000 claims abstract description 9
- 238000009792 diffusion process Methods 0.000 claims abstract description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003011 anion exchange membrane Substances 0.000 claims abstract description 8
- 150000007513 acids Chemical class 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 150000003839 salts Chemical class 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 14
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 2
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 2
- 150000007519 polyprotic acids Polymers 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 150000003840 hydrochlorides Chemical class 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- -1 nitrates Chemical class 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は硝酸塩等の１価の塩を効率よく回収する方法、
特に硝酸を使ったステンレス酸洗浄廃液から、硝酸を効
率よ（回収する方法に係るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for efficiently recovering monovalent salts such as nitrates,
In particular, it relates to a method for efficiently recovering nitric acid from stainless steel acid cleaning waste liquid that uses nitric acid.
［従来の技術］
硝酸やリン酸のように水中に放流されると水質を汚濁す
る物質をそのまま廃水として放出することは公害防止の
観点から許されず、特に硝酸のような比較的高価な酸を
ステンレスの酸洗浄廃液として使った場合、これを効率
よく回収することが工業的にも望ましい。[Prior art] From the viewpoint of pollution prevention, it is not permissible to release substances such as nitric acid and phosphoric acid, which pollute the water quality if they are discharged into water, as wastewater. When used as acid cleaning waste liquid for stainless steel, it is industrially desirable to efficiently recover it.
し発明が解決しようとする課題］
従来、このようなステンレス鋼の酸洗浄廃液は、多量の
鉄が溶は出し、硝酸鉄となっており、このうち硝酸のま
まであるのは極わずかである。この為、これをイオン交
換膜によって回収しようとしても硝酸そのものしか回収
できず、大部分の硝酸塩はそのままになってしまう。[Problems to be Solved by the Invention] Conventionally, a large amount of iron dissolves out of such stainless steel pickling waste liquid and becomes iron nitrate, and only a small amount of this remains as nitric acid. . For this reason, even if an attempt is made to recover this using an ion exchange membrane, only nitric acid itself can be recovered, and most of the nitrate remains as is.
［課題を解決する為の手段］
本発明者は、かかる不都合をな（して、効率よ（硝酸塩
となっている硝酸分を回収することを目的として種々研
究、検討した結果、回収しようとする硝酸塩等の１価の
酸に対し、２種或はそれ以上の酸を添加してアニオン交
換膜を用いた拡散透析法により、１価の酸を回収するこ
とにより、前記目的を達成し得ることを見出した。[Means for Solving the Problem] The present inventor has conducted various studies and examinations with the aim of eliminating such inconveniences and efficiently recovering nitric acid that has become nitrate. The above objective can be achieved by adding two or more types of acids to a monovalent acid such as nitrate and recovering the monovalent acid by diffusion dialysis using an anion exchange membrane. I found out.
本発明は一般式で表わすと次のようになる。The present invention can be expressed in the following general formula.
Ｍｅ（Ｎｏｔ）ｚ＋）Ｉ２ＳＯ４２ＨＮＯ３＋ＭｅＳＯ
４か（して硝酸塩は硝酸に戻り、アニオン交換膜での回
収が可能となる。Me(Not)z+)I2SO42HNO3+MeSO
4 (Thus, the nitrate returns to nitric acid, which can be recovered using an anion exchange membrane.
本発明において用いられる２価又はそれ以上の酸として
は、硫酸、燐酸等が挙げられ、これはそれぞれ単独又は
混合して用いることができる。用いられるこれらの酸は
、例えば、硝酸と硝酸塩の混合液に対し、硝酸塩に相当
するモル数か或はそれ以上を用いるのが適当である。又
本発明が適用される２価の塩としては、硝酸塩、塩酸塩
等が挙げられる。Examples of divalent or higher acid acids used in the present invention include sulfuric acid and phosphoric acid, which can be used alone or in combination. For example, it is appropriate to use these acids in an amount equivalent to or more than the number of moles of the nitrate in a mixed solution of nitric acid and the nitrate. Further, divalent salts to which the present invention is applied include nitrates, hydrochlorides, and the like.
又、用いられるアニオン交換膜としては、価イオン選択
透過膜を用しすること番こより、２価或はそれ以上の酸
の移動を防止して１価の酸の回収率を挙げることができ
る。回■又酸中番こ若干のＨ，ＳＯ４の混入が可能であ
れ（ｆ、硝酸根として１００％近い値での回収が可能で
あり、硝酸公害が回避できる。Furthermore, by using a valence ion selective permeation membrane as the anion exchange membrane, it is possible to prevent the movement of divalent or higher valence acids and increase the recovery rate of monovalent acids. Even if it is possible to mix some H and SO4 into the acid (f), it is possible to recover nearly 100% of the nitrate radicals, and nitric acid pollution can be avoided.
［実施例］
実施例Ｉ
ＨＮＯ−５ｇ／ｌ 、 Ｆｅ（ＮＯｓ）ｓ ２４２ｇ／
ｌの混合？夜番コＨ２Ｓ０４（９８％） １５０ｇ／ｌ
添加し、アニオン交換月莫である旭硝子製ＤＭＶ膜を用
し）で拡散透牢斤を＋”ｒなった。上記原液を拡散透析
槽の下側力）ら１００ｃｃ／Ｈｒの速度で添加し、水を
１００ｃｃ／Ｈｒの速度で上側から添加した。拡散透析
槽の有効膜面積（士０、１０２ｍ２であった。約２時間
通液し安定したところで性能を測定した。その結果回収
された酸の組成はＨＮｏ、 １５０ｇ／ｌ、Ｈ２ＳＯ４
０ｏｇ／ｌ 、Ｆｅ（ＮＯ，）３２ｇ／ｌであり、液量
は９５ｃｃ／Ｈｒであった。すなわちＮＯ，根として７
３％回収されたこと（こなり、Ｆｅ（ＮＯ，）３よりＨ
ＮＯ３を回収したこと番こなる。[Example] Example I HNO-5g/l, Fe(NOs)s 242g/l
A mixture of l? Night watch H2S04 (98%) 150g/l
The above stock solution was added to the bottom of the diffusion dialysis tank at a rate of 100 cc/hr, Water was added from the top at a rate of 100 cc/Hr.The effective membrane area of the diffusion dialysis tank was 102 m2.The water was passed for about 2 hours and the performance was measured when it became stable.As a result, the recovered acid Composition is HNo, 150g/l, H2SO4
0 og/l, Fe(NO,) 32 g/l, and the liquid amount was 95 cc/Hr. i.e. NO, 7 as root
3% recovery (Konari, H from Fe(NO,)3
It was my turn to collect NO3.
実施例２
上記同一実験を拡散透析槽に組込むアニオン膜としてｍ
個アニオン選択化膜であるＡＳＶ膜を使用して行なった
。使用した拡散透析膜の有効膜面積は０．４０８ｍ２の
ものを使用した。その結果、ＨＮＯ３１８８ｇ／ｌ、Ｈ
２ＳＯ４０，５ｇ／ｌ、Ｆｅ（ＮＯ，）、 ０．３ｇ／
ｌの混合液を９８ｃｃ／Ｈｒで得られた。すなわちＮＯ
，根として９５％回収されたことになり、Ｆｅ（Ｎｏ、
）３よりＨＮＯ，を回収したことになる。Example 2 The same experiment as described above was performed using m as an anion membrane incorporated into a diffusion dialysis tank.
The experiment was carried out using an ASV membrane which is an anion-selective membrane. The effective membrane area of the diffusion dialysis membrane used was 0.408 m2. As a result, HNO3188g/l, H
2SO40.5g/l, Fe(NO,), 0.3g/l
1 of the mixed liquid was obtained at 98 cc/Hr. In other words, NO
, 95% was recovered as roots, and Fe(No,
)3, HNO was recovered.
比較例
ＨＮＯ３５ｇ／１． Ｆｅ（Ｎｏｔ）３２４２ｇ／ｌの
混合液に硫酸を添加することな〈実施例１の方法で拡散
透析を行なった。その結果ＨＮＯ３４ｇ／ｌ、Ｆｅ（Ｎ
Ｏ３）３２ｇ／ｌの混合液を９５ｃｃ／Ｈｒで回収した
。回収されたＮＯ３根は２．３％にすぎなかった。Comparative example HNO35g/1. Diffusion dialysis was performed using the method of Example 1 without adding sulfuric acid to a mixed solution containing 3242 g/l of Fe (Not). As a result, HNO34g/l, Fe(N
A mixed solution of 32 g/l of O3) was recovered at 95 cc/Hr. Only 2.3% of NO3 roots were recovered.
Claims (1)
又はそれ以上の酸を添加してアニオン交換膜を用いた拡
散透析法による１価の酸の回収方法。 ２、１価の塩が硝酸塩である請求項１の１価の酸の回収
方法。 ３、１価の塩が塩酸塩である請求項１の１価の酸の回収
方法。 ４、２価又はそれ以上の酸が硫酸及び／又は燐酸である
請求項１の１価の酸の回収方法。５、アニオン交換膜は
、１価アニオン選択透過膜である請求項１の１価の酸の
回収方法。[Claims] 1. A method for recovering a monovalent acid by adding a divalent or more acid to a monovalent salt such as nitrate to be recovered and using a diffusion dialysis method using an anion exchange membrane. . 2. The method for recovering monovalent acids according to claim 1, wherein the monovalent salt is a nitrate. 3. The method for recovering a monovalent acid according to claim 1, wherein the monovalent salt is a hydrochloride. 2. The method for recovering monovalent acids according to claim 1, wherein the tetravalent, divalent or higher acid is sulfuric acid and/or phosphoric acid. 5. The method for recovering monovalent acids according to claim 1, wherein the anion exchange membrane is a monovalent anion selectively permeable membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18406190A JPH0471682A (en) | 1990-07-13 | 1990-07-13 | Method for recovering monobasic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18406190A JPH0471682A (en) | 1990-07-13 | 1990-07-13 | Method for recovering monobasic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0471682A true JPH0471682A (en) | 1992-03-06 |
Family
ID=16146695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18406190A Pending JPH0471682A (en) | 1990-07-13 | 1990-07-13 | Method for recovering monobasic acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0471682A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1939142A1 (en) * | 2006-12-22 | 2008-07-02 | The European Community, represented by the European Commission | Method for nitrate collection |
| DE102011077706A1 (en) | 2010-06-17 | 2011-12-22 | Nextgen Solar, Llc | Bicontinuous, interpenetrating composite useful in photovoltaic device e.g. solar cell, comprises semiconducting organic phase, semiconducting particulate phase, p-n junctions at interfaces, and processing aid |
-
1990
- 1990-07-13 JP JP18406190A patent/JPH0471682A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1939142A1 (en) * | 2006-12-22 | 2008-07-02 | The European Community, represented by the European Commission | Method for nitrate collection |
| DE102011077706A1 (en) | 2010-06-17 | 2011-12-22 | Nextgen Solar, Llc | Bicontinuous, interpenetrating composite useful in photovoltaic device e.g. solar cell, comprises semiconducting organic phase, semiconducting particulate phase, p-n junctions at interfaces, and processing aid |
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