Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite

被引：25

作者：

Youcef, Lamia Dali ^{[1
]}

Lopez-Galindo, Alberto ^{[2
]}

Verdugo-Escamilla, Cristobal ^{[2
]}

Belaroui, Lala Setti ^{[1
,3
]}

机构：

[1] Univ Oran1, Lab Chim Mat LCM, Fac Sci Exactes & Appl, Oran BP 1524, Oran, Algeria

[2] Univ Granada, Inst Andaluz Ciencias Tierra, Consejo Super Invest Cient, Avda Palmeras 4, Granada 18100, Spain

[3] Univ Oran1, Dept Pharm, Fac Med, BP 1510 Oran El MNaouer, Oran, Algeria

来源：

APPLIED CLAY SCIENCE | 2020年 / 193卷

关键词：

Algerian palygorskite; Hydrothermal synthesis; Zeolite LTA; COAL FLY-ASH; NA-X ZEOLITE; A-TYPE; SILICA; CRYSTALLIZATION; KAOLINITE; SEPIOLITE; CLAY; METAKAOLINITE; SODALITE;

D O I：

10.1016/j.clay.2020.105690

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A palygorskitic-rich Algerian clay (Sif Pal) has been selected as Si source to synthesize zeolite LTA through a hydrothermal treatment by using sodium aluminate. Sif Pal is activated under re flux using hydrochloric acid solutions at different concentrations (4, 6 and 7 mol.L-1 ) in a ratio of 50 g.L-1 and then analysed using XRD, SEM and XRF analysis. The selected product (PalH1) is mixed with NaOH solutions at different concentrations (1, 2, 3, 4 and 5 mol.L-1 ), diverse NaAl2O3 quantities (1, 2, 3 and 5 g) and analysed after several nucleation (1, 2, 3 and 5 h) and crystallization (6, 18 and 24 h) times to check the in fluence of these parameters on the synthesis of zeolite LTA. To obtain almost pure (>98%) zeolite LTA, the better experimental conditions were: 3 mol.L-1 of NaOH solutions, 3 g of sodium aluminate, 3 h for nucleation and 24 h for crystallization.

引用

页数：8

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