WO2021014513A9 - 高純度人工ゼオライトの工業的大量生産に関する製造方法 - Google Patents
高純度人工ゼオライトの工業的大量生産に関する製造方法 Download PDFInfo
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
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- C01B33/28—Base exchange silicates, e.g. zeolites
- C01B33/2807—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
- C01B33/2869—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of other types characterised by an X-ray spectrum and a definite composition
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- C01B33/28—Base exchange silicates, e.g. zeolites
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- C01B33/2815—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L)
- C01B33/283—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of type A (UNION CARBIDE trade name; corresponds to GRACE's types Z-12 or Z-12L) from a reaction mixture containing at least one aluminium silicate or aluminosilicate of a clay-type, e.g. kaolin or metakaolin or its exotherm modification or allophane
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- C01B33/28—Base exchange silicates, e.g. zeolites
- C01B33/2807—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
- C01B33/2838—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of faujasite type, or type X or Y (UNION CARBIDE trade names; correspond to GRACE's types Z-14 and Z-14HS, respectively)
- C01B33/2846—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of faujasite type, or type X or Y (UNION CARBIDE trade names; correspond to GRACE's types Z-14 and Z-14HS, respectively) of type X
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- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
- C01B33/28—Base exchange silicates, e.g. zeolites
- C01B33/2807—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures
- C01B33/2838—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of faujasite type, or type X or Y (UNION CARBIDE trade names; correspond to GRACE's types Z-14 and Z-14HS, respectively)
- C01B33/2853—Zeolitic silicoaluminates with a tridimensional crystalline structure possessing molecular sieve properties; Isomorphous compounds wherein a part of the aluminium ore of the silicon present may be replaced by other elements such as gallium, germanium, phosphorus; Preparation of zeolitic molecular sieves from molecular sieves of another type or from preformed reacting mixtures of faujasite type, or type X or Y (UNION CARBIDE trade names; correspond to GRACE's types Z-14 and Z-14HS, respectively) of type Y
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
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- C01B39/22—Type X
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
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- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
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Definitions
- the present invention is a method for producing an artificial zeolite using fly ash as a raw material, particularly relating to an industrial mass production of high-purity artificial zeolite.
- the starting composition is composed of at least four components (molar ratio) of oxides (bases) such as alkali (NaOH, KOH), alumina, silica and water, and zeolite is a naturally occurring natural zeolite.
- bases such as alkali (NaOH, KOH), alumina, silica and water
- zeolite is a naturally occurring natural zeolite.
- High-purity synthetic zeolite is made from reagents such as "alkali raw sodium hydroxide, potassium hydroxide, silica raw water glass, colloidal silica, sodium silicate, etc., alumina raw sodium aluminate, aluminum hydroxide, nitrate.
- the starting composition is four components (containing no impurities) from "a raw material such as aluminum and water", and is crystallized under conditions such as temperature conditions and reaction time. Therefore, in the evaluation of the synthetic zeolite using the reagent, it can be said that the synthetic zeolite is a high-purity synthetic zeolite because the "X-ray diffraction pattern intensity" (hereinafter referred to as "lattice constant”) has the same relative intensity value.
- Japanese Unexamined Patent Publication No. 7-165418 Conventionally, when producing an artificial zeolite made from coal ash (fly ash), the production was carried out by hydrothermal reaction with an alkaline aqueous solution without removing impurities contained in the fly ash in advance. Most of the methods.
- Patent Document 1 is not particularly limited as long as it can be washed by dissolving iron, calcium, sodium, magnesium and other impurities contained in fly ash using a strong acid, and specific examples thereof include sulfuric acid and hydrochloric acid. It is disclosed that it dissolves in a strongly acidic aqueous solution of (concentration 90 wt% to 100 wt%, concentration 10 to 50% by volume). If the concentration is lower than the above-mentioned predetermined range, impurities are not dissolved so much that pickling cannot be sufficiently performed. Further, it is described that even if it exceeds a predetermined range, the cleaning effect is not significantly improved and it is not practical from the viewpoint of usage efficiency. Further, in this method, it is described that the addition of one or more zeolitic auxiliary agents selected from sodium aluminate, colloidal silica and sodium silicate to the mixture further promotes the purification of zeolite.
- Patent Document 1 in Examples 1 to 6, 1 liter of an aqueous solution of 30% by volume of industrial concentrated sulfuric acid is heated to 80 ° C. using fly ash as a raw material, and 500 g of fly ash is added thereto. I left it for a while. Then, the dissolved components were washed and removed with water. Then, 50 g of the washed fly ash, the required amount of NaOH and colloidal silica are put into 100 ml of water and mixed and stirred, then sodium aluminate is dissolved in 200 ml of water and added to the heated mixture while stirring. It is described that the reaction was carried out at the reaction temperature, the reaction time and the standing state, and then the solid content was filtered off to obtain the zeolites of Examples 1 to 6.
- the conventionally known method for producing artificial zeolite is a laboratory-scale synthetic method in which a small amount of sample is prepared over many hours, and it cannot be said that it can be mass-produced industrially.
- An object of the present invention is to provide a method for producing a high-purity artificial zeolite that is industrially suitable for mass production scale, not on a laboratory scale.
- the fly ash infiltrated into an alkaline aqueous solution, and then the alkaline aqueous solution (fly ash infiltration treatment liquid) is subjected to an acid (hydrochloride, sulfuric acid, nitrate, etc.) ) Is added and permeated again with an acidic aqueous solution of pH (1.0 or less), and then solid-liquid separation and dehydration are performed while washing with water in a centrifuge to obtain SiO 2 , trace amounts of Na 2 O, and K 2.
- an acid hydrochloride, sulfuric acid, nitrate, etc.
- fly ash is infiltrated into an alkaline aqueous solution, an acid is added to the fly ash infiltrated aqueous solution, and the fly ash is permeated again with an acidic aqueous solution having a pH of 1.0 or less.
- This is a method for producing an artificial zeolite in which a starting composition is synthesized by liquid separation and dehydration, and the starting composition is subjected to an aqueous thermal reaction treatment to industrially mass-produce high-purity artificial zeolite.
- the mass ratio of the fly ash to the alkaline aqueous solution is preferably 1:10 to 25. Further, in the alkaline aqueous solution, the molar ratio of NaOH / KOH is preferably 1.0, and the pH is preferably 13.0 or more.
- the alkaline aqueous solution is permeated at room temperature of 5 to 25 degrees for 1 to 48 hours. Subsequently, an aqueous acid solution is added, and the permeation treatment is carried out at room temperature of 5 to 25 degrees for 1 to 48 hours.
- the acid is preferably sulfuric acid, hydrochloric acid, nitric acid or the like. After that, solid-liquid separation is performed while washing with water using a centrifuge. Dehydration produces a white crystalline product, such as silica.
- the zeolite production equipment (this plant) in the present invention is shown in FIG.
- High-temperature and high-pressure device (autoclave) MAX capacity 130L (maximum temperature 180 ° C, maximum pressure 1,5MPa), once-through boiler (160kg / h, 1,5Mpa), centrifuge, electric furnace, etc.
- MAX capacity 130L maximum temperature 180 ° C, maximum pressure 1,5MPa
- once-through boiler 160kg / h, 1,5Mpa
- centrifuge electric furnace, etc.
- Example 1 The following is a typical method for producing a hydrophilic type A artificial zeolite.
- the A-type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 2.0 and Na 2 O / SiO 2 of 1. .0, H 2 O / Na 2 O should consist of 56.
- the silica source is 100 liters (8) of a 2.0 N alkaline aqueous solution consisting of SiO 2 (ignoring a small amount of alkaline Na2O) from which impurities have been removed, sodium hydroxide as an alkali source, aluminum hydroxide as an alumina source, and water.
- FIG. 6 shows a comparison diagram of the X-ray analysis data diagram of the artificial zeolite A type of Example 1.
- FIG. 6-a shows the artificial zeolite A type of Example 1 of the present application
- FIG. 6-b shows the X-ray analysis data of the conventional artificial zeolite A type as Comparative Example 1.
- the lattice constant intensity (CPS) of FIG. 6-a of Example 1 of the present application is 240000.
- the lattice constant intensity (CPS) of Comparative Example FIG. 6-b is 165000.
- SiO 2 / Al 2 O 3 is 1.0 for the following reasons. Since the mass of SiO 2 is 11.85 kg and the molecular weight of SiO 2 is 60, 11.85 / 60 is 0.1975. Since the mass of Al 2 O 3 is 10.05 kg and the molecular weight of Al 2 O 3 is 102, 10.05 / 102 is 0.09852. Therefore, the molar ratio SiO 2 / Al 2 O is 0.1975 / 0.09852, which is 2.0.
- Na 2 O / SiO 2 is 1.0 for the following reasons. Since 99% of 8.0 kg of NaOH is Na 2 O, the mass of Na 2 O is 7.92 kg. In place of NaOH, the molecular weight of NaOH is 40, so 7.92 / 40 is 0.198. Since the mass of SiO 2 is 11.85 kg and the molecular weight of SiO 2 is 60, 11.85 / 60 is 0.1975. Therefore, the molar ratio of Na 2 O / SiO 2 is 0.198 / 0.1975, which is 1.0.
- H 2 O / Na 2 O is 56 for the following reasons.
- the alkaline aqueous solution is a 2.0 N alkaline aqueous solution, from Table 3 below, the NaOH concentration of 2.0 N is 56 for H 2 O / Na 2 O.
- Table 3 is a list of molar ratios.
- Example 2 The following is a typical method for producing a hydrophilic X-type artificial zeolite.
- the X-type starting composition has a molar ratio of 5.0 of SiO 2 / Al 2 O 3 and 0 of Na 2 O / SiO 2. .8, H 2 O / Na 2 O should consist of 40.
- Silica raw is 100 liters of alkaline aqueous solution (10.) of SiO 2 (ignoring a small amount of alkaline Na2O) from which impurities have been removed, consisting of sodium hydroxide of alkaline raw material, aluminum hydroxide of alumina raw material, and water with a four-component ratio of 2.7 N. 30.6 kg of fly ash from which impurities have been removed (Since the concentration of SiO 2 in the fly ash is 58.7%, SiO 2 is 17.96 kg) is added to 0 kg of NaOH and 90.0 liters of H 2 O)).
- FIG. 7 shows a comparison diagram of the X-ray analysis data diagram of the artificial zeolite X type of Example 2. This is a graph of the relationship between the lattice constant intensity and the reaction time.
- FIG. 7-a shows the X-ray analysis data of the artificial zeolite X type of Example 2 of the present application
- FIG. 7-b shows the X-ray analysis data of the conventional artificial zeolite X type as Comparative Example 2.
- the lattice constant intensity (CPS) of Example 2 of the present application in FIG. 7-a is 350,000.
- the lattice constant intensity (CPS) of Comparative Example 2 in FIG. 7-b is 230000.
- the calculation of the molar ratio of the artificial zeolite X-type starting composition of Example 2 is the same as the calculation method of the artificial zeolite A-type of Example 1 as described above. The same shall apply hereinafter.
- Example 3 The following is a typical method for producing a hydrophobic Y-type artificial zeolite.
- the production conditions for using the Y-type artificial zeolite as a single crystal phase are as follows: in the starting composition, the Y-type starting composition has a molar ratio of 10 SiO 2 / Al 2 O 3 and 0.5 Na 2 O / SiO 2. , H 2 O / Na 2 O is made up of 44.5. Similar to the description in Example 1, in the silica source, SiO 2 from which impurities have been removed (a trace amount of alkali Na 2 O is ignored) is 2 of four component ratios consisting of aluminum hydroxide as an alkali source, aluminum hydroxide as an alumina source, and water.
- Example 4 The following is a typical method for producing a hydrophobic MOD type artificial zeolite.
- the MOD type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 15.6 and Na 2 O / SiO 2 of 0. .3, H 2 O / Na 2 O should consist of 56.
- the silica source is 50 liters of a 2.0 N alkaline aqueous solution consisting of SiO 2 (ignoring a small amount of alkaline Na 2 O) from which impurities have been removed, sodium hydroxide as an alkali source, aluminum hydroxide as an alumina source, and water.
- the temperature is set to 175 ° C. and the reaction time is 16 hours, and the hydrothermal reaction treatment is performed to obtain a gel slurry of the artificial zeolite MOD type product.
- the gel slurry of the MOD type product is cooled and precipitated for 1 to 24 hours, clean water is removed, and while washing with a centrifuge, PH (10 or less) solid-liquid separation and dehydration is performed, and then dried in an electric furnace (100 ° C., 7 hours). Crystallization of the hydrophilic white artificial zeolite MOD type was obtained.
- a high-purity artificial zeolite MOD type having a lattice constant ( ⁇ ) could be industrially mass-produced (42.5 kg / batch).
- the following is a typical method for producing an artificial zeolite Na-P type that can produce both hydrophilic and hydrophobic.
- Example 5 The production conditions for using the hydrophilic Na-P type artificial zeolite as a single crystal phase are that the hydrophilic Na-P type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 2 and Na 2 O in the starting composition. / SiO 2 is 1.0 and H 2 O / Na 2 O is 33. Similar to the description in Example 1, in the silica source, SiO 2 from which impurities have been removed (a trace amount of alkali N2O is ignored) is composed of aluminum hydroxide as an alkali source, aluminum hydroxide as an alumina source, and 3N NaOH having a four component ratio of water.
- a gel slurry of the mold composition was obtained. After the gel slurry of the artificial zeolite Na-P type composition is cooled and precipitated for 1 to 24 hr, clean water is removed, and the mixture is separated and dehydrated at pH (10 or less) while being washed with a centrifuge, and then dried in an electric furnace (drying in an electric furnace (10 or less). (100 ° C., 7 hours) to obtain hydrophilic white artificial zeolite Na-P type crystals. The obtained crystal composition was a hydrophilic high-purity artificial zeolite Na-P type crystal having a high lattice constant ( ⁇ ) as a result of powder XRD analysis.
- Example 6 The production conditions for using the hydrophobic Na-P type artificial zeolite as a single crystal phase are that the hydrophobic Na-P type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 10 and Na 2 O in the starting composition. / SiO 2 is 0.5 and H 2 O / Na 2 O is 56. Similar to the description in Example 1, the silica source is a 2N NaOH aqueous solution having four component ratios consisting of SiO 2 from which impurities have been removed, sodium hydroxide of Na 2 O which tends to be deficient in alkali source, aluminum hydroxide of alumina source, and water.
- the solution was added, and the mixture was transferred to an autoclave while maintaining the temperature at 60 to 40 ° C., set to a temperature of 110 ° C. and a reaction time of 6 hours, and subjected to hydrothermal reaction treatment to obtain a gel slurry of artificial zeolite Na-P type composition.
- the gel slurry of the obtained Na-P type composition was cooled and precipitated for 1 to 24 hours, then the clean water was removed and the gel slurry was purified by a centrifuge, and after solid-liquid separation and dehydration at pH (10 or less), an electric furnace was used. Crystallization of hydrophobic white artificial zeolite Na-P type was obtained by internal drying (100 ° C., 7 hours). The obtained crystal composition was found to have a high hydrophobicity with a high lattice constant ( ⁇ ) as a result of powder XRD analysis. It was a pure artificial zeolite Na-P type crystal.
- the A-type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 1.0 to 2.0 and Na 2 O / SiO 2. It is preferably 0.5 to 1.2 and H 2 O / Na 2 O is 40 to 60.
- the X-type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 2.5 to 5.0 and Na 2 O / SiO 2 of 0.5. It is preferable that the content is ⁇ 1.2 and H 2 O / Na 2 O is 40 to 60.
- the X-type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 10 to 27, Na 2 O / SiO 2 of 0.5, and H 2 O. / Na 2 O is preferably 40 to 60.
- SiO 2 / Al 2 O 3 is 7.0 to 16, Na 2 O / SiO 2 is 2.6, and H 2 O / Na 2 O is 56. It is preferable to have.
- the Na-P type starting composition has a molar ratio of SiO 2 / Al 2 O 3 of 1.0 to 12, and Na 2 O / SiO 2 of 0. It is preferable that .5 to 1.2 and H 2 O / Na 2 O are 33 to 60.
- FIG. 8 is a technical data for crystal structure analysis (Rietveld method) of zeolite.
- Zeolites have a pore structure called a pore structure in their crystal structure, and can adsorb cations and water molecules in their internal cavities. Due to these characteristics, zeolite is industrially used as a catalyst, molecular sieve, adsorbent and the like.
- Information on the crystal structure and ions is important for the development of zeolite. Information is obtained using powder X-rays (XRD Rietveld method), and XRD patterns are simulated from lattice constants and atomic locus diseases, and measured. Fit the powder XRD pattern. As a result, evaluation and determination of various zeolites are made based on the coordinates and occupancy of atoms (ions).
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Abstract
Description
この方法のフローを図1に示す。
高温高圧装置(オートクレーブ)MAX容量130L(最高温度180℃・最大圧1、5MPa)・貫流式ボイラー(160kg/h・1,5Mpa)・遠心分離機 ・電気炉など一連の製造設備(本プラントと表記)を使用することで高純度人工ゼオライトの工業的大量生産をすることができる。
下記は、代表的な親水性A型人工ゼオライトの製造方法である。
A型人工ゼオライトを単一の結晶相とする製造条件として、出発組成物において、A型出発組成物がモル比でSiO2/Al2O3が2.0、Na2O/SiO2が1.0、H2O/Na2Oが56からなるようにする。シリカ原は不純物除去したSiO2(微量のアルカリNa2Oを無視した)をアルカリ原の水酸化ナトリウム、アルミナ原の水酸化アルミニウム及び水からなる4つの成分比の2.0Nのアルカリ水溶液100リットル(8.0kgのNaOH及び92.0リットルのH2O)に不純物除去した20.2kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は11.85kg)を添加し、0.3~1hr攪拌し、半透明溶液を得た。この溶液に続いて16.9kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、10.05kg)を加えて白濁溶液になるまで攪拌してゲルスラリー溶液を60~40℃に保ったまま、オートクレーブに移行し、温度100℃及び反応時間4hに設定して水熱反応処理して人工ゼオライトA型組成物のゲルスラリーを得る。そのA型組成物のゲルスラリーを1~24h冷却沈殿したあと、上水を除去して遠心分離機で洗浄しながら、pH10以下で固液分離脱水後、100℃で7時間、電気炉内乾燥させて、親水性白色人工ゼオライトA型の結晶化が得られた。得られた結晶組成物をXRD分析結果格子定数(Å)の高純度人工ゼオライトA型を工業的に大量生産(42.29kg/バッチ)できた。
図6-aに本願実施例1の人工ゼオライトA型、図6-bに比較例1として従来の人工ゼオライトA型のX線解析データを示す。
本願実施例1の図6-aの格子定数強度(CPS)は、240000である。一方、比較例図6-bの格子定数強度(CPS)は、165000である。
比較例と実施例1の格子定数強度の比は、165000/240000=0.666となる。
従って、図6-bの格子定数強度は低く、従来の人工ゼオライトA型は、高純度人工ゼオライトとは呼べない。
SiO2の質量は11.85kg、SiO2の分子量は60であるから、11.85/60は、0.1975である。
Al2O3の質量は10.05kg、Al2O3の分子量は102であるから、10.05/102は、0.09852である。
よって、モル比SiO2/Al2Oは、0.1975/0.09852は、2.0である。
8.0kgのNaOHの99パーセントがNa2Oになるので、Na2Oの質量は7.92kgである。NaOHにおきかえて、NaOHの分子量は40であるから、7.92/40は、0.198である。
SiO2の質量は11.85kg、SiO2の分子量は60であるから、11.85/60は、0.1975である。
よって、モル比Na2O/SiO2は、0.198/0.1975は、1.0である。
実施例1において、アルカリ水溶液は2.0Nのアルカリ水溶液であるから下記の表3から、2.0NのNaOH濃度は、H2O/Na2Oが56である。表3は、モル比一覧表である。
下記は、代表的な親水性X型人工ゼオライトの製造方法である。
X型人工ゼオライトを単一の結晶相とする製造条件として、出発組成物において、X型出発組成物がモル比でSiO2/Al2O3が5.0、Na2O/SiO2が0.8、H2O/Na2Oが40からなるようにする。
シリカ原は不純物除去したSiO2(微量のアルカリNa2Oを無視した)をアルカリ原の水酸化ナトリウム・アルミナ原の水酸化アルミ・水からなる4つ成分比 2,7Nのアルカリ水溶液100リットル(10.0kgのNaOH及び90.0リットルのH2O))に不純物除去した30.6kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は17.96kg)を添加し0,3~1h撹拌し半透明溶液の溶液を得た溶液(A)に、次いて10.2kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、6.069kg)を加えて白濁溶液になるまで撹拌してゲルスラリー溶液(B)を60~40℃に保ったまま、オートクレーブに移行し、温度100℃・反応時間5hに設定して水熱反応処理して人工ゼオライトX型生成物のゲルスラリーを図る。
そのX型生成物のゲルスラリーを1~24h冷却沈殿したあと、上水を除去して遠心分離機で洗浄しながらPH(10以下)固液分離脱水後、電気炉内乾燥(100℃・7h)させて親水性白色人工ゼオライトX型の結晶化が得られた。
得られた結晶生成物を粉末XRD分析結果格子定数(Å)の高純度人工ゼオライトX型(表2)を工業的に大量生産(46,51kg/バッチ)できた。
図7-aに本願実施例2の人工ゼオライトX型、図7-bに比較例2として従来の人工ゼオライトX型のX線解析データを示す。
図7-aの本願実施例2の格子定数強度(CPS)は、350000である。一方、図7-bの比較例2の格子定数強度(CPS)は230000である。
比較例2と実施例2の格子定数強度の比は、230000/350000=0.657となる。
従って、図7-bの比較例2の格子定数強度は低く、従来の人工ゼオライトX型は、高純度人工ゼオライトとは呼べない。
下記は、代表的な疎水性Y型人工ゼオライトの製造方法である。
Y型人工ゼオライトを単一の結晶相とする製造条件は、出発組成物において、Y型出発組成物がモル比でSiO2/Al2O3が10、Na2O/SiO2が0.5、H2O/Na2Oが44.5からなるようにする。実施例1記載と同様に、シリカ原は不純物除去したSiO2(微量のアルカリNa2Oは無視)をアルカリ原の水酸化アルミニウム、アルミナ原の水酸化アルミニウム及び水からなる4つの成分比の2.5NのNaOH水溶液50リットル(5kgのNaOH及び45リットルのH2O)に不純物除去した50.5kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は29.64kg)を添加し、0.5~1hr攪拌し、半透明の溶液を得る。次いで、8.4kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、4.998kg)を加えて、白濁溶液になるまで攪拌し、ゲルスラリー溶液を得て、そのゲルスラリー溶液に半透明溶液を加えて、オートクレーブに移行し、60~50℃に保ったまま、12~24時間熟成させた後、温度100℃及び反応時間24hr設定して水熱反応処理して人工ゼオライトY型組成物のゲルスラリーを図る。そのY型組成物のゲルスラリーを1~24h冷却沈殿したあと、上水を除去して遠心分離機で洗浄しながら、pH(10以下)で固液分離脱水後、電気炉内乾燥(100℃、7h)させて、親水性白色人工ゼオライトY型の結晶化が得られた。得られた結晶組成物を粉末XRD分析結果格子定数(Å)の高純度人工ゼオライトY型を工業的に大量生産(67.1kg/バッチ)できた。
下記は、代表的な疎水性MOD型人工ゼオライトの製造方法である。
MOD型人工ゼオライトを単一の結晶相とする製造条件として、出発組成物において、MOD型出発組成物がモル比でSiO2/Al2O3が15.6、Na2O/SiO2が0.3、H2O/Na2Oが56からなるようにする。シリカ原は不純物除去したSiO2(微量のアルカリNa2Oを無視した)をアルカリ原の水酸化ナトリウム、アルミナ原の水酸化アルミニウム及び水からなる4つの成分比の2.0Nのアルカリ水溶液50リットル(4.0kgのNaOH及び46.0リットルのH2O)に不純物除去した33.7kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は19.78kg)を添加し、0.3~1hr攪拌し、半透明溶液を得た。この溶液に続いて3.6kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、2.142kg)を加えて白濁溶液になるまで攪拌してゲルスラリー溶液(B)の得て、そのゲルスラリー溶液(B)に半透明溶液の溶液(A)を加えてオートクレーブに移行し60~50℃に保ったまま12~24時間熟成させた後、温度175℃・反応時間16hに設定して水熱反応処理して人工ゼオライトMOD型生成物のゲルスラリーを図る。そのMOD型生成物のゲルスラリーを1~24h冷却沈殿したあと、上水を除去して遠心分離機で洗浄しながらPH(10以下)固液分離脱水後、電気炉内乾燥(100℃・7h)させて親水性白色人工ゼオライトMOD型の結晶化が得られた。得られた結晶生成物を粉末XRD分析結果格子定数(Å)の高純度人工ゼオライトMOD型を工業的に大量生産(42,5kg/バッチ)できた。
親水性Na-P型人工ゼオライトを単一の結晶相とする製造条件は、出発組成物において親水性Na-P型出発組成物がモル比でSiO2/Al2O3が2、Na2O/SiO2が1.0、H2O/Na2Oが33からなるようにする。
実施例1記載と同様に、シリカ原は不純物除去したSiO2(微量のアルカリN2Oは無視)をアルカリ原の水酸化アルミニウム、アルミナ原の水酸化アルミニウム及び水からなる4つの成分比の3NのNaOH水溶液100リットル(12kgのNaOH及び88リットルのH2O)に不純物除去した30.7kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は18.02kg)を添加し、0.5~1hr攪拌し、半透明溶液を得る。次いでその溶液に25.4kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、15.11kg)を加えて、白濁溶液になるまで攪拌してゲルスラリー溶液を得て、温度60~40℃に保ったままの状態でオートクレーブに移行し、温度175℃及び反応時間1.5時間に設定し水熱反応処理して人工ゼオライトNa-P型組成物のゲルスラリーを得た。その人工ゼオライトNa-P型組成物のゲルスラリーを1~24hr冷却沈殿したあと、上水を除去して遠心分離機で洗浄しながらpH(10以下)で固液分離脱水後、電気炉内乾燥(100℃、7時間)させて親水性白色人工ゼオライトNa-P型の結晶が得られた。得られた結晶組成物は、粉末XRD分析結果格子定数(Å)の高い親水性高純度人工ゼオライトNa-P型の結晶であった。
疎水性Na-P型人工ゼオライトを単一の結晶相とする製造条件は、出発組成物において疎水性Na-P型出発組成物がモル比でSiO2/Al2O3が10、Na2O/SiO2が0.5、H2O/Na2Oが56からなるようにする。
実施例1記載と同様に、シリカ原は不純物除去したSiO2、アルカリ原不足がちのNa2Oの水酸化ナトリウム、アルミナ原の水酸化アルミニウム及び水からなる4つの成分比の2NのNaOH水溶液50リットル(NaOH(4.0kg)及びH2O(45リットル)に不純物除去した40.4kgのフライアッシュ(フライアッシュ中のSiO2 濃度は58.7%であるから、SiO2は23.71kg)を添加し、0.5~1h攪拌し、半透明溶液を得る。次いで、2NのNaOH水溶液50リットル(4kgのNaOH及び45リットルのH2O)、6.77kgの水酸化アルミニウム(上記水酸化アルミニウムにAl2O3を59.5%含有しており、Al2O3は、4.02kg)を加えて、白濁溶液になるまで攪拌してゲルスラリー溶液を得る。そのゲルスラリー溶液に半透明の溶液を加えて、温度60~40℃に保ったままの状態でオートクレーブに移行し、温度110℃及び反応時間6時間に設定し水熱反応処理して人工ゼオライトNa-P型組成物のゲルスラリーを得た。そのNa-P型組成物のゲルスラリーを1~24時間冷却沈殿したあと、上水を除去して遠心分離機で清浄しながら、pH(10以下)で固液分離脱水後、電気炉内乾燥(100℃、7時間)させて疎水性白色人工ゼオライトNa-P型の結晶化が得られた。得られた結晶組成物は、粉末XRD分析結果格子定数(Å)の高い疎水性高純度人工ゼオライトNa-P型の結晶であった。
X型人工ゼオライトを単一の結晶相とする製造では、X型出発組成物がモル比でSiO2/Al2O3が2.5~5.0、Na2O/SiO2が0.5~1.2、H2O/Na2Oが40~60であることが好ましい。
Y型人工ゼオライトを単一の結晶相とする製造では、X型出発組成物がモル比でSiO2/Al2O3が10~27、Na2O/SiO2が0.5、H2O/Na2Oが40~60であることが好ましい。
MOD型人工ゼオライトを単一の結晶相とする製造では、SiO2/Al2O3が7.0~16、Na2O/SiO2が2.6、H2O/Na2Oが56であることが好ましい。
Na-P型人工ゼオライトを単一の結晶相とする製造では、Na-P型出発組成物がモル比でSiO2/Al2O3が1.0~12、Na2O/SiO2が0.5~1.2、H2O/Na2Oが33~60であることが好ましい。
ゼオライトは、結晶構造に孔路と呼ばれる細孔構造を持ち、その内部空洞に陽イオンや水分子を吸着すことができる。これらの特徴から、ゼオライトは触媒、分子ふるい、吸着剤など工業的に引く利用されている。
ゼオライト開発には、結晶構造やイオンの情報が重要であり、粉末X線(XRDリートベルト法)を用いて、情報を入手し、格子定数や原子座病などからXRDバターンをシミュレーションし、実測の粉末XRDバターンををフィッティングする。
これにより、原子(イオン)の座標、占有率によって、各種ゼオライトの評価決定がされる。
Claims (6)
- アルカリ水溶液にフライアッシュを浸透処理した後、そのフライアッシュ浸透水溶液に酸を添加してpH1.0以下の酸性水溶液で再度浸透処理して、その後遠心分離機で水洗浄しながら固液分離し、脱水して、出発組成物を合成し、この出発組成物を水熱反応処理して、高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
- 出発組成物が人工ゼオライトA型であって、A型出発組成物がモル比でSiO2/Al2O3が1.0~2.0、Na2O/SiO2が0.5~1.2、H2O/Na2Oが40~60からなる請求項1記載の高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
- 出発組成物が人工ゼオライトX型であって、X型出発組成物がモル比でSiO2/Al2O3が2.5~5.0、Na2O/SiO2が0.5~1.2、H2O/Na2Oが40~60からなる請求項1記載の高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
- 出発組成物が人工ゼオライトY型であって、Y型出発組成物がモル比でSiO2/Al2O3が10~27、Na2O/SiO2が0.5、H2O/Na2Oが40~60からなる請求項1記載の高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
- 出発組成物が人工ゼオライトMOD型であって、MOD型出発組成物がモル比でSiO2/Al2O3が7.0~16、Na2O/SiO2が2.6、H2O/Na2Oが56からなる請求項1記載の高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
- 出発組成物が人工ゼオライトNa-P型であって、Na-P型出発組成物がモル比でSiO2/Al2O3が1.0~12、Na2O/SiO2が0.5~1.2、H2O/Na2Oが33~60からなる請求項1記載の高純度人工ゼオライトを工業的に大量生産する人工ゼオライトの製造方法。
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CN104291349B (zh) * | 2014-09-26 | 2016-06-01 | 东北石油大学 | 一种以粉煤灰为原料制备p型分子筛的方法 |
GB201610955D0 (en) * | 2016-06-23 | 2016-08-10 | Univ Of The Western Cape | Process for production of aluminosilicate zeolite from fly ash |
CN108946754B (zh) * | 2017-05-24 | 2021-02-26 | 神华集团有限责任公司 | Sba-15介孔分子筛及制法和应用以及粉煤灰产氧化铝和sba-15介孔分子筛之法 |
US11186894B2 (en) * | 2017-11-20 | 2021-11-30 | Purdue Research Foundation | Preparation of rare earth metals and other chemicals from industrial waste coal ash |
CN108059171B (zh) * | 2018-01-15 | 2021-04-23 | 天津大学 | 一种粉煤灰合成hzsm-5型沸石的方法 |
CN108959171A (zh) * | 2018-09-14 | 2018-12-07 | 上海头趣科技有限公司 | 基于am5728架构的模块及基于am5728架构的装置 |
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2019
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WO2021014513A1 (ja) | 2021-01-28 |
CN112533869B (zh) | 2023-10-20 |
CN112533869A (zh) | 2021-03-19 |
US20220363555A1 (en) | 2022-11-17 |
EP3978436A1 (en) | 2022-04-06 |
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