JP2017154965A - 銀担持ゼオライト成形体 - Google Patents
銀担持ゼオライト成形体 Download PDFInfo
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- JP2017154965A JP2017154965A JP2017031864A JP2017031864A JP2017154965A JP 2017154965 A JP2017154965 A JP 2017154965A JP 2017031864 A JP2017031864 A JP 2017031864A JP 2017031864 A JP2017031864 A JP 2017031864A JP 2017154965 A JP2017154965 A JP 2017154965A
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- silver
- zeolite
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 232
- 239000010457 zeolite Substances 0.000 title claims abstract description 231
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 229
- 229910052709 silver Inorganic materials 0.000 claims abstract description 143
- 239000004332 silver Substances 0.000 claims abstract description 142
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 127
- 238000005342 ion exchange Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- -1 silver ions Chemical class 0.000 claims abstract description 17
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 14
- 150000001340 alkali metals Chemical class 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims description 41
- 239000002245 particle Substances 0.000 claims description 32
- 239000007864 aqueous solution Substances 0.000 claims description 27
- 239000010419 fine particle Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims 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 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 abstract description 12
- 238000004220 aggregation Methods 0.000 abstract description 11
- 229910000272 alkali metal oxide Inorganic materials 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 description 43
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 36
- 238000005259 measurement Methods 0.000 description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000011230 binding agent Substances 0.000 description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 229910001961 silver nitrate Inorganic materials 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 17
- 239000000203 mixture Substances 0.000 description 13
- 239000003513 alkali Substances 0.000 description 12
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical group [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 11
- 239000003463 adsorbent Substances 0.000 description 10
- 238000005469 granulation Methods 0.000 description 10
- 230000003179 granulation Effects 0.000 description 10
- 150000003378 silver Chemical class 0.000 description 10
- 238000000465 moulding Methods 0.000 description 9
- 241000894007 species Species 0.000 description 9
- 238000009826 distribution Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 239000005995 Aluminium silicate Substances 0.000 description 7
- 235000012211 aluminium silicate Nutrition 0.000 description 7
- 239000004927 clay Substances 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 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 7
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 235000004035 Cryptotaenia japonica Nutrition 0.000 description 2
- 235000015724 Trifolium pratense Nutrition 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- JYIMWRSJCRRYNK-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4] JYIMWRSJCRRYNK-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 229940100890 silver compound Drugs 0.000 description 2
- 150000003379 silver compounds Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 102000007641 Trefoil Factors Human genes 0.000 description 1
- 240000002913 Trifolium pratense Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- CQLFBEKRDQMJLZ-UHFFFAOYSA-M silver acetate Chemical compound [Ag+].CC([O-])=O CQLFBEKRDQMJLZ-UHFFFAOYSA-M 0.000 description 1
- 229940071536 silver acetate Drugs 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 229910000367 silver sulfate Inorganic materials 0.000 description 1
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
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- B01J20/16—Alumino-silicates
- B01J20/18—Synthetic zeolitic molecular sieves
- B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
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- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/10—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing iron group metals, noble metals or copper
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- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
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Abstract
【解決手段】 Si/Al2モル比が2.0以上3.0以下、(アルカリ金属+Ag)/Alモル比が0.9以上1.1以下、SiO2、Al2O3、Ag2O、及びアルカリ金属酸化物の総量が90重量%以上であり、なおかつ、銀イオンを5重量%以上含み、ゼオライトは1種である銀担持ゼオライト成形体。当該成形体はゼオライト純度が90%以上のゼオライト成形体を銀含有水溶液でイオン交換処理することにより製造できる。
【選択図】 図1
Description
例えば、X型ゼオライト粉末を含む成形体のゼオライト純度は以下の式(2)から算出できる。
このような高いゼオライト純度を有するゼオライト成形体は、成形体中の無機バインダーをゼオライトに転換することにより得られる。すなわち、本発明の成形体は、ゼオライトに転換された無機バインダーを含有する。通常、無機バインダーをゼオライトに転換すると、後述するゼオライト微粒子となり、ゼオライト粉末の表面に存在する。ゼオライト微粒子はゼオライト粉末同士を結合するバインダーとして機能するため、本発明の成形体の機械強度は高くなる。つまり、ゼオライト微粒子を含まない、ゼオライト純度90%未満の成形体の強度は実質的に低くなる。通常ゼオライト成形体は、ゼオライト粉末と無機バインダーの混合物を成形することで得られるが、ゼオライト粉末を90重量%以上混合した物では、成形に必要な可塑性を得ることができず、一定の形状を有する成形体にすることが極めて困難になる。したがって、本発明の成形体はゼオライト粉末とゼオライト微粒子を含むことが好ましい。
例えば、銀イオンの含有量は、以下の式(4)で表される。
なお、本発明において各銀種の割合はUV−VIS測定により求めることができる。すなわち、本発明の成形体のUV−VISパターンを波形分離し、波形分離後のUV−VISパターンにおいて、波長210nm以上240nm以下にピークトップを有するピークを銀イオンのピーク、波長240nm超350nm以下にピークトップを有するピークを銀クラスターのピーク、及び、波長350nm超700nm以下にピークトップを有するピークを金属銀として求めることができる。得られた各ピークのピーク面積から銀イオン、銀クラスター、及び、金属銀に含まれる銀の割合を求めることができる。
前処理として、ゼオライト粉末、またはゼオライト成形体(以下、単に「試料」ともいう。)を大気中110℃で乾燥し、水分を十分に除去した。前処理後の試料をデシケーター内に静置し、温度25℃、相対湿度80%の条件下で16時間以上放置し、水分を飽和吸着させる水和処理を行った。水和処理後の試料重量(X1)を測定した。更に、水和処理後の試料に対して大気中、900℃の条件下で、1時間熱処理し、水分を十分に除去した。熱処理後の試料重量(X2)を測定した。X1及びX2の値を用いて以下の式(5)により試料100g当たりの水分吸着量(以下、「g/100g−剤」とする。)を求めた。
式(5)により得られた水分吸着量を式(1)に代入してゼオライト純度を算出した。
一般的なBET比表面測定装置(装置名:BELSORP 28SA、日本ベル社製)を用い、BET比表面積を測定した。吸着温度は液体窒素温度(−196℃)として吸着等温線を測定した。得られた吸着等温線における相対圧力0〜0.1に相当する範囲の窒素吸着容量から、BET比表面積を計算した。
成形体試料を酸に溶解し測定溶液とした。測定溶液中の金属イオン濃度をICP法により測定した。測定には、一般的なICP−AES(装置名:OPTIMA3000DV、PERKIN−ELMER社製)を使用した。
成形体中の銀の状態(銀種)は紫外可視光測定により測定した。すなわち、積分球付属装置(装置名:ISR−3100、島津製作所社製)を試料室に取り付けた自記分光光度計(装置名:UV−3100、島津製作所社製)を用い、以下の条件で紫外可視吸光測定を行った。
スキャンスピード :200nm/min
スリット幅 :5.0nm
ベースライン補正 :硫酸バリウム粉末
測定波長範囲 :210〜700nm
得られたUV−VISパターンを波形分離した。波形分離後のUV−VISパターンにおいて、波長210nm以上240nm以下にピークトップを有するピークを銀イオンのピーク、波長240nm超350nm以下にピークトップを有するピークを銀クラスターのピーク、及び、波長350nm超700nm以下にピークトップを有するピークを金属銀とした。得られた各ピークのピーク面積から銀イオン(Ag(ion))、銀クラスター(Ag(clus))、及び、金属銀(Ag(metal))に含まれる銀の割合を求めた。
ICP測定により得られた銀担持量、及び、UV−VIS測定により得られた各銀種の割合から、測定試料中の各銀種の含有量を求めた。
10,000倍の測定倍率で観察した走査型電子顕微鏡観察図において確認できる独立した最小単位の粒子であって粒子径が1.5μm以下の粒子を無作為に30個抽出し、その大きさを計測し、その平均径を求め、ゼオライト微粒子の平均粒子径とした。
成形体5gを乳鉢にて10分間粉砕した後、目開き200μmの篩を通した。篩を通過した粉砕後の試料0.5gを純水50mlに添加してスラリーとした後、ホモジナイザーにて2分間超音波分散を行った。その後、そのスラリー溶液の粒度分布をマイクロトラック(日機装社製)にて測定した。
X型ゼオライト粉末(商品名:F−9、東ソー製)100重量部に対し、カオリン粘土20重量部、カルボキシメチルセルロース3重量部を、水を添加しながら混練して混合物を得た。得られた混合物の水分量は45重量%であった。
市販のX型ゼオライト成形体(商品名:モレキュラーシーブ13X、キシダ化学社製、Si/Al2モル比=3.3)を使用したこと以外は実施例1と同様な方法で本比較例の成形体を得た。市販のX型ゼオライト成形体の水分吸着量は29.5(g/100g−剤)であり、よって、ゼオライト純度は84.3重量%であった。
硝酸銀29.9gを純水142gに溶解して、17.4重量%の硝酸銀水溶液を作製したこと以外は実施例1と同様な方法で本実施例の成形体を得た。本実施例の成形体の評価結果を表4、表5及び表6に示す。
硝酸銀32.5gを純水142gに溶解して、18.6重量%の硝酸銀水溶液を作製したこと以外は比較例1と同様な方法で本実施例の成形体を得た。本比較例の成形体の評価結果を表4、表5及び表6に示す。
A型ゼオライト粉末(商品名:A−4、東ソー製)100重量部に対し、カオリン粘土20重量部、カルボキシメチルセルロース3重量部を、水を添加しながら混練して混合物を得た。得られた混合物の含水量は45重量%であった。
硝酸銀30、7gを純水142gに溶解して、17.8重量%の硝酸銀水溶液を作製したこと以外は実施例3と同様な方法で本実施例の成形体を得た。本実施例の成形体の評価結果を表7、表8及び表9に示す。
焼成後の成形体を室温の純水で洗浄し、洗浄後、NaOHを6重量%含む水溶液を、235mL/分の流速で、当該成形体に循環流通した。循環流通は40℃で1時間行った後、80℃で5時間行い、カオリン粘土をA型ゼオライトに転換したこと以外は実施例1と同様な方法でゼオライト成形体を得た。
Claims (8)
- Si/Al2モル比が2.0以上3.0以下、(アルカリ金属+Ag)/Alモル比が0.9以上1.1以下、SiO2、Al2O3、Ag2O、及びアルカリ金属酸化物の総量が90重量%以上であり、なおかつ、銀イオンを5重量%以上含み、ゼオライトは1種である銀担持ゼオライト成形体。
- アルカリ金属がナトリウムである請求項1に記載の銀担持ゼオライト成形体。
- BET比表面積が560m2/g以上900m2/g以下である請求項1又は2に記載の銀担持ゼオライト成形体。
- FAU型の結晶構造を有する請求項1乃至3いずれか一項に記載の銀担持ゼオライト成形体。
- 銀含有量が36重量%未満である請求項1乃至4いずれか一項に記載の銀担持ゼオライト成形体。
- ゼオライト粉末の表面に、平均粒子径が0.2μm以上1.5μm以下のゼオライト微粒子を有する請求項1乃至5いずれか一項に記載の銀担持ゼオライト成形体。
- ゼオライト純度が90%以上のゼオライト成形体を銀含有水溶液でイオン交換処理するイオン交換工程を有する請求項1乃至6いずれか一項に記載の銀担持ゼオライト成形体の製造方法。
- イオン交換処理工程後のゼオライト成形体を100℃以下で乾燥する乾燥工程を有する請求項7に記載の製造方法。
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JP2020015651A (ja) * | 2018-07-26 | 2020-01-30 | 東ソー株式会社 | 銀イオン交換ゼオライトの製造方法 |
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