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Received May 26, 2009
Accepted July 15, 2009
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세제 빌더용 제올라이트 4A의 물성 향상을 위한 합성공정 연구
A Study on Synthesis Process of Zeolite 4A for Improvement of Properties as a Detergent Builder
충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 1(주)제오빌더, 137-952 서울시 서초구 서초동 1500-10 2한국화학연구원 환경자원연구센터, 305-600 대전시 유성구 장동 100
Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 1Zeobulider Co. Ltd., 1500-10, Seocho-dong, Seocho-gu, Seoul 137-952, Korea 2Environment & Resource Center, Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon 305-600, Korea
Korean Chemical Engineering Research, August 2009, 47(4), 488-494(7), NONE Epub 25 August 2009
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Abstract
세제 빌더의 중요한 물성인 흡유능(O.A.C)을 향상시키기 위하여 새로운 합성방법인 2단계 결정화법을 이용하여 제올라이트 4A를 합성하였다. 즉, 기존의 원료인 cullet(SiO2)과 수산화알루미늄 대신에 베트남산 모래와 천연 보크사이트로부터 용출한 알루민산소다 용액을 활성탄소로 정제하여 사용하였고, 합성과정은 1단계는 Si/Al 몰비를 1.15로 조절하고 55 ℃에서 4시간, 2단계는 알루미나 용액을 추가로 가하여 Si/Al 몰비를 0.98로 낮추고 65 ℃에서 5시간 반응시켰다. 새로운 방법은 제올라이트 4A의 입도(평균 1.2 μm)와 입자응집 및 표면극성을 더 잘 제어할 수 있었고, 백색도를 향상시켰다. 이렇게 합성된 제올라이트 4A는 기존제품과 비교하여 대등한 칼슘이온교환 능력을 가짐은 물론 100 g당 50 ml 이상의 우수한 흡유능력을 보여줌으로서 새로운 공정의 경제성 및 유효성이 검증되었다.
Zeolite 4A was prepared by new synthesis method, 2-step crystallization, for enhancement of oil absorption capacity. Vietnamese sand and NaAlO2 solution from natural bauxite were used as raw materials in stead of conventional cullet and Al(OH)3 to reduced the processing cost. Some dissolved organics in NaAlO2 solution were removed by activated carbon. Synthetic method was progressed by 1) reacting the raw materials at 55 ℃, 4 hr with the ratio of Si/Al to 1.15, and 2) reacting at 65 ℃, 5 hr with reducing the ratio of Si/Al to 0.98. New method can easily control the particle size, aggregation, surface polarity, and enhanced the whiteness of the products. The prepared zeolite 4A shows excellent oil absorption capacity(O.A.C>50 ml/100 g) as well as equal value with calcium ion exchange capacity, and proves the 2-step crystallization is the economic and effective process for the preparation of zeolite 4A.
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Lietzmann A, Blasey G, Rahse W, Semrau M, Kruse HF, WO 42142 (2000)
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Mackinnon I, Millar G, Stolz W, WO 087573 A1 (2004)
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Min BG, Lee JY, Song YS, Seo G, Korean Chem. Eng. Res., 45(6), 547 (2007)
