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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 6, 2009
Accepted June 8, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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물유리에서 소달라이트의 합성: 합성모액 조성이 결정화도와 입자 크기에 미치는 영향

Synthesis of Sodalite from Water Glass: Effect of the Composition of Synthetic Mixtures on Its Crystallinity and Crystallite Size

배송은 서곤^† 송미경¹ 노경태²

Song Eun Bae Gon Seo^† Mee Kyung Song¹ Kyoung Tai No²

전남대학교 응용화학공학부, 500-757 광주광역시 북구 용봉동 300 ¹(사)분자설계연구소 신소재설계팀, 120-749 서울특별시 서대문구 신촌동 134 ²연세대학교 생명공학과, 120-749 서울특별시 서대문구 신촌동 134

School of Applied Chemical Engineering and the Institute for Catalysis Research, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju 500-757, Korea ¹Bioinformatics and Molecular Design Research Center, , Yonsei Engineering Research Complex B138A, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 120-749, Korea ²Department of Biotechnology, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 120-749, Korea

gseo@chonnam.ac.kr

Korean Chemical Engineering Research, August 2009, 47(4), 424-429(6), NONE Epub 25 August 2009

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Abstract

물유리로 제조한 알칼리성 실리카-알루미나 합성모액에서 Na2O, SiO2, H2O 함량이 소달라이트의 결정화도와 입자 크기에 미치는 영향을 조사하였다. x=2.5~7.5, y=1.4~3.0, z=140~400 범위에서 한 성분의 함량만 바꾸어 제조한 x Na2O·y SiO2·Al2O3·z H2O 조성의 합성모액을 140 ℃에서 2일간 수열 반응시켜 소달라이트를 합성하였다. Na2O 함량이 많아지면 소달라이트의 결정화도가 높아지나 입자는 작아졌다. 합성모액의 SiO2/Al2O3 몰비가 2 근처에서 소달 라이트가 생성되었으며, 물의 함량이 달라지면 합성되는 제올라이트의 종류가 달라졌다. 이 합성조건에서는 SiO2/Al2O3 몰비가 2.0 근처이고, Na2O 함량이 많은 영역에서는 결정화도가 높은 소달라이트가 합성되었으며, 나트륨 이온의 구조유도체로서 효과로 입자 크기는 작아졌다.

The effects of Na2O, SiO2 and H2O contents of the synthetic mixtures prepared from water glass on the crystallinity and crystallite size of sodalite were studied. The composition of the synthetic mixtures described by x Na2O·y SiO2·Al2O3·z H2O was varied within x=2.5~7.5, y=1.4~3.0, z=140~400. The hydrothermal reaction was carried out at 140 ℃ for 2 days. High content of Na2O resulted in the high crystallinity and small crystallite of sodalite. The SiO2/Al2O3 molar ratios of around 2 were suitable for the synthesis of sodalite, and produced zeolite species were varied_x000D_ by the H2O content. Sodalite was mainly obtained with a high crystallinity from the synthetic mixtures with SiO2/Al2O3 molar ratio of around 2 and high content of Na2O. The high content of sodium ions caused a decrease in the particle sizes because of their role of structure directing agent.

Keywords

Sodalite Water Glass Synthesis Crystallinity Crystallite Size

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