JP4239006B2 - 硝酸廃液の処理方法 - Google Patents
硝酸廃液の処理方法 Download PDFInfo
- Publication number
- JP4239006B2 JP4239006B2 JP2004148772A JP2004148772A JP4239006B2 JP 4239006 B2 JP4239006 B2 JP 4239006B2 JP 2004148772 A JP2004148772 A JP 2004148772A JP 2004148772 A JP2004148772 A JP 2004148772A JP 4239006 B2 JP4239006 B2 JP 4239006B2
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- JP
- Japan
- Prior art keywords
- nitric acid
- acid
- waste liquid
- reducing agent
- organic reducing
- 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.)
- Expired - Lifetime
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- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 title claims description 55
- 229910017604 nitric acid Inorganic materials 0.000 title claims description 55
- 239000007788 liquid Substances 0.000 title claims description 31
- 239000002699 waste material Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 24
- 238000000354 decomposition reaction Methods 0.000 claims description 22
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 150000007522 mineralic acids Chemical class 0.000 claims description 13
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 12
- 238000003672 processing method Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 23
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate group Chemical group [N+](=O)([O-])[O-] NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
以下、本発明の分解処理方法を実施形態に基づいて具体的に説明する。
本発明の硝酸態窒素の分解処理方法は、処理すべき硝酸廃液に塩酸などの無機酸を加えて酸濃度の調整を行う。無機酸の添加は処理前でも良く、処理の途中でも良い。無機酸の添加量は処理終了時の酸濃度が0.3N〜1.0N、好ましくは0.3N〜0.5Nとなる量である。なお、硝酸の分解が進行すると硝酸による酸濃度は低下し、硝酸の全量が分解したときの酸濃度は添加した無機酸の量によって定まる。従って、硝酸の分解率が99%程度以上であるとき、添加する無機酸の量は硝酸を除くこの無機酸による酸濃度が概ね0.3N〜1.0N、好ましくは0.3N〜0.5Nとなる量であればよい。溶液の酸濃度がこれより低いと硝酸の分解が十分に進まない。一方、酸濃度がこれより高いと残留する無機酸の中和に多量の塩基薬剤を必要とするようになるので好ましくない。
2HNO3+HCHO → NO+NO2+2H20+CO2
〔実施例〕
図1に示すように、密閉反応容器10、ヒータ11、コンデンサー12、温度計13、有機還元剤供給管路14、掃気供給管路15を備えた分解装置を用い、表1に示す量の塩酸を加えた硝酸水溶液を反応容器10に入れ、これをヒータ11で90℃まで加熱し、容器内にホルマリン(HCHO)を数回に分けて滴下した。この滴下は1時間ごとに徐々に行った。酸濃度および反応時間と残留窒素濃度の関係を図2に示した。また、反応終了後の溶液中の残留窒素濃度を測定し、この結果を表1に示した。
Claims (3)
- 硝酸廃液に有機還元剤を添加して硝酸分を分解する方法において、処理前または処理中に、硫酸または塩酸を添加して、硝酸を除くこの無機酸(硫酸または塩酸)による分解処理終了時の酸濃度が0.3N〜1.0Nの範囲になるようにし、有機還元剤を徐々に添加して反応を進めることを特徴とする硝酸廃液の処理方法。
- 上記有機還元剤の添加量が、上記硝酸廃液の硝酸態窒素の1.0倍当量以上〜1.5倍当量以下である請求項1の処理方法。
- 常圧下で沸騰しない温度に加熱し、有機還元剤を数回に分けて添加して硝酸分を分解させる請求項1または2の処理方法。
Priority Applications (1)
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---|---|---|---|
JP2004148772A JP4239006B2 (ja) | 2004-05-19 | 2004-05-19 | 硝酸廃液の処理方法 |
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JP2004148772A JP4239006B2 (ja) | 2004-05-19 | 2004-05-19 | 硝酸廃液の処理方法 |
Publications (2)
Publication Number | Publication Date |
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JP2005329304A JP2005329304A (ja) | 2005-12-02 |
JP4239006B2 true JP4239006B2 (ja) | 2009-03-18 |
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JP2004148772A Expired - Lifetime JP4239006B2 (ja) | 2004-05-19 | 2004-05-19 | 硝酸廃液の処理方法 |
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JP (1) | JP4239006B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012170949A (ja) * | 2011-02-24 | 2012-09-10 | Mitsubishi Materials Corp | 硝酸廃液の処理方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1975945A4 (en) * | 2006-01-19 | 2014-09-17 | Japan Nuclear Fuel Limite | SODIUM SALT RECYCLING SYSTEM FOR USE IN WET REMRESTMENT OF USED NUCLEAR FUEL |
JP5908717B2 (ja) * | 2011-07-07 | 2016-04-26 | 三菱マテリアル株式会社 | 硝酸含有溶液の処理方法 |
RU2726224C1 (ru) * | 2019-12-11 | 2020-07-10 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" | Способ концентрирования жидких радиоактивных отходов |
CN115057418A (zh) * | 2022-06-24 | 2022-09-16 | 中国原子能科学研究院 | 用于制备二氧化氮的方法和装置 |
CN115043382A (zh) * | 2022-06-24 | 2022-09-13 | 中国原子能科学研究院 | 制备二氧化氮的方法和用于连续制备二氧化氮的装置 |
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2004
- 2004-05-19 JP JP2004148772A patent/JP4239006B2/ja not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012170949A (ja) * | 2011-02-24 | 2012-09-10 | Mitsubishi Materials Corp | 硝酸廃液の処理方法 |
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