JP6848415B2 - 超純水製造装置及び超純水製造装置の運転方法 - Google Patents
超純水製造装置及び超純水製造装置の運転方法 Download PDFInfo
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 112
- 229910052751 metal Inorganic materials 0.000 claims description 80
- 239000002184 metal Substances 0.000 claims description 80
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- 229910052697 platinum Inorganic materials 0.000 claims description 10
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
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- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
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- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
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Images
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- Degasification And Air Bubble Elimination (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Catalysts (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Description
平均粒子径3.5nmの白金ナノコロイド粒子を、0.07重量%の担持量で強塩基性ゲル型アニオン交換樹脂に担持させ、白金族金属触媒樹脂として、白金族の金属ナノ粒子を担持したアニオン交換樹脂を調製した。
実施例1において、水素ガス供給手段13を設けなかった以外は同様にして超純水製造装置1を構成して超純水W3を製造した。サブシステム4の白金族金属触媒樹脂塔14の入口水及び出口水の過酸化水素濃度(初期)を測定した結果を表1に示す。また、この超純水製造装置1の運転を長期間継続した後の白金族金属触媒樹脂塔14の出口水の過酸化水素濃度(末期)を測定した。結果を表1にあわせて示す。
比較例1において、サブシステム4の白金族金属触媒樹脂塔14の樹脂を表層部、中部、下部の3領域に分別して取り出し、表層部及び中部の樹脂をそれぞれの試験用のカラムに充填し、試験用の白金族金属触媒樹脂塔とした。また、参考例として新品の樹脂を同様に試験用のカラムに充填し、白金族金属触媒樹脂塔とした。
3 一次純水製造装置
4 サブシステム(二次純水製造装置)
6 紫外線酸化装置
7 再生型イオン交換装置
8 膜式脱気装置
12 紫外線酸化装置
13 水素ガス供給手段
14 白金族金属触媒樹脂塔
15 膜式脱気装置
16 非再生型混床式イオン交換装置
17 限外濾過膜
W 原水
W1 前処理水
W2 一次純水
W3 超純水(二次純水)
Claims (8)
- 紫外線酸化装置、再生型混床式イオン交換塔又は電気脱イオン装置及び膜式脱気装置を有する一次純水製造装置と、該一次純水製造装置から得られた一次純水を処理する紫外線酸化装置、白金族金属触媒樹脂塔及び膜式脱気装置をこの順で有するサブシステムを備える超純水製造装置において、
前記サブシステムの前記紫外線酸化装置と前記白金族金属触媒樹脂塔との間に、水素ガス供給手段を設けた、超純水製造装置。 - 前記サブシステムが非再生型混床式イオン交換塔を有する、請求項1に記載の超純水製造装置。
- 前記白金族金属触媒樹脂塔における白金族金属が白金、パラジウム又は白金/パラジウム合金である、請求項1又は2に記載の超純水製造装置。
- 前記白金族金属が平均粒子径1〜50nmの白金族の金属の粒子である、請求項1〜3のいずれかに記載の超純水製造装置。
- 紫外線酸化装置、再生型混床式イオン交換塔又は電気脱イオン装置、及び膜式脱気装置を有する一次純水製造装置と、該一次純水製造装置から得られた一次純水を処理する紫外線酸化装置、水素ガス供給手段、白金族金属触媒樹脂塔及び膜式脱気装置をこの順で有するサブシステムとを備える超純水製造装置の運転方法であって、被処理水を前記一次純水製造装置及び前記サブシステムに連続して通水して超純水を製造する、超純水製造装置の運転方法。
- 前記白金族金属触媒樹脂塔における白金族金属が白金、パラジウム又は白金/パラジウム合金である、請求項5に記載の超純水製造装置の運転方法。
- 前記白金族金属が平均粒子径1〜50nmの白金族の金属の粒子である、請求項5又は6に記載の超純水製造装置の運転方法。
- 前記サブシステムの前記紫外線酸化装置の処理水のH2O2濃度が10〜100μg/Lであり、該サブシステムの前記白金族金属触媒樹脂塔の処理水のH2O2濃度が0.1〜10μg/Lである、請求項5〜7のいずれかに記載の超純水製造装置の運転方法。
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