Crystallization of JBW, CAN, SOD and ABW type zeolite from transformation of meta-kaolin

Lin, De-Chang; Xu, Xiaojun; Zuo, Feng; Long, Yingcai

doi:10.1016/j.micromeso.2004.03.003

Cited by 69 publications

(51 citation statements)

References 34 publications

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“…Nowadays, the use of clays, particularly those containing SiO2 and Al2O3, are experiencing a considerable interest in the industry. Low cost zeolite A with an Al/Si ratio of 1:1 is a major product from thermally activated clay materials containing kaolin or metakaolin [5][6][7]. Zeolites LTA are more versatile and are widely used in industrial applications such as catalysts, adsorbent, sieving and ion exchanger [1,5,7].…”

Section: Introductionmentioning

confidence: 99%

“…Low cost zeolite A with an Al/Si ratio of 1:1 is a major product from thermally activated clay materials containing kaolin or metakaolin [5][6][7]. Zeolites LTA are more versatile and are widely used in industrial applications such as catalysts, adsorbent, sieving and ion exchanger [1,5,7]. The contamination of waste water with complex carcinogenic aromatic structures in synthetic dyes discharged daily as aqueous waste causes many problems such as toxicity and oxygen demand of the effluent [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

Chinar

Benbouzid

2016

Eur. J. Chem.

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The zeolitic porous material was prepared from kaolinitic clay (DD1 from Gebel Debbagh, Algeria) using a cheap and easy process to insert a sodium ion into the kaolinitic clay structure. The obtained zeolitic Linde Type-A (LTA) material was characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and X-ray diffraction techniques. The adsorption capacity of the zeolitic porous material was tested with methylene blue. The best correlation of experimental results was obtained with the Langmuir model giving a Qmax of 11.5 mg/g indicating a favorable process for the adsorption of the dye. KEYWORDS

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

Chinar

Benbouzid

2016

Eur. J. Chem.

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“…Kaolin has been widely used in the synthesis of zeolites (4A zeolite [13] , 5A zeolite [14] , zeolite Y [15] , zeolite X [16] , zeolite ZSM-5 [17] , zeolite LTA [18] , JBW, CAN, SOD and ABW type zeolite [19] , et al). However, the technique for synthesizing mesoporous materials using coal-measure kaolin as raw materials has not yet been thoroughly investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of surfactant/silica and hydrothermal time on the specific surface area of mesoporous materials from coal-measure kaolin

2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Mesoporous materials with the highest surface area were synthesized by hydrothermal treatment from coal-measure kaolin using cetyltrimethylammonium bromide (CTAB) as template. The effect of several factors on surface area of products also had been discussed. The products were characterized by FT-IR, HRTEM and N 2 adsorption and desorption isotherm plot methods. There was typical structure as Si-O, Si-OH and Si-O-Si of mesoporous materials in the framework of synthesized materials; the pore size distributions of the products showed a sharp peak at 3.82 nm. The effect of hydrothermal treatment time and the amount of template on the specifi c surface area of mesoporous materials was important, when the Surf/Si = 0.135, and hydrothermal time = 12 h, and the surface area of the product reached up to 1 070 m 2 /g, which was higher than other products.

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“…On the other hand, kaolin is one of the clay materials most widely used by human being since antiquity. It is an ideal raw material for syntheses of low-silica zeolites, such as zeolite A (Chandrasekhar et al, 1997;Chandrasekhar and Pramada, 2008), X (Colina and Llorens, 2007), JBW, CAN, SOD, and ABW (Lin et al, 2004), because the molar contents DOI 10.1007/s12182-010-0085-x of SiO 2 and Al 2 O 3 are similar with each other. Some zeolites with higher Si/Al ratios, such as mordenite (Mignoni et al, 2008), ZSM-5 (Madhusoodana, et al, 2005) and Y have also been prepared by using kaolin and additional silica sources as starting materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin

Zhang

Cao

et al. 2010

Pet. Sci.

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Well-crystallized high-silica NaY zeolites (Si/Al>2.5) were prepared from a reaction mixture consisting of metakaolin, sodium silicate solution and seed solution via optimization of the mixture composition and reaction conditions. The transformation from kaolin to high-silica NaY zeolite was confirmed by XRD, SEM and IR techniques. Subsequently, the influence of synthesis parameters, i.e. initial SiO 2 /Al 2 O 3 , initial Na 2 O/SiO 2 , initial H 2 O/SiO 2 , aging time of the seed solution, crystallization temperature and crystallization time, on the NaY growth was investigated in terms of crystallinity and Si/Al ratio. The results showed that the effects of initial SiO 2 /Al 2 O 3 , initial Na 2 O/SiO 2 and initial H 2 O/ SiO 2 on the crystallinity and Si/Al ratio of NaY zeolite are similar to those observed in the conventional syntheses of NaY zeolites only using sodium silicate solution as silicon source. However, due to the use of metakaolin as the main silicon and aluminum sources in the present study, a long crystallization induction period of 20 h was achieved, which can be attributed to the dissolution of metakaolin. In addition, different from the conventional syntheses of zeolite NaY, pure NaY zeolites (i.e. without NaP zeolite impurity) were still obtained even at 120 °C because of the use of a large quantity of seed solution (23 wt%) in the reaction mixture. As the aging time of the seed solution increased from 3.5 h to 22 h, the relative crystallinity of the NaY zeolite fi rst increased sharply and then reached a plateau, while the Si/Al ratio fi rst increased rapidly up to a maximum value of 2.75 corresponding to an aging time of 6.5 h, and then decreased sharply with the aging time.

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Crystallization of JBW, CAN, SOD and ABW type zeolite from transformation of meta-kaolin

Cited by 69 publications

References 34 publications

Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

Preparation and characterization of an efficient zeolitic material from a local natural kaolinitic clay and its uses in the elimination of an organic dye

Effect of surfactant/silica and hydrothermal time on the specific surface area of mesoporous materials from coal-measure kaolin

Influence of synthesis parameters on the crystallinity and Si/Al ratio of NaY zeolite synthesized from kaolin

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