Effect of a chelating agent on the synthesis of zeolitic materials from waste sandstone cake using alkali fusion

• Autorzy: Wajima T. , Ikegami Y.
• Języki publikacji: EN

Abstrakty

EN

During quarrying, waste stone cake is discharged as industrial waste, and in Japan the amount of cake amounts annually to 50 millions tons. To promote waste recycling, we attempted to convert waste sandstone cake into zeolitic material using alkali fusion. However, calcium causes the synthesis of an undesirable zeolite by interfering in the synthesis of a high functional zeolite. As a means to inhibit this Ca-interference, we studied the effect of adding a chelating agent, EDTA (Ethylenediaminetetraacetic acid disodium dihydrate), on the synthesis of zeolitic material from sandstone cake using alkali fusion. Hydroxysodalite, zeolite-X and zeolite-P can be synthesized from sandstone cake using alkali fusion. With the addition of EDTA, calcium ions in solution were trapped by chelation, and the amount of zeolite-X and zeolite-P increased. A product with a high CEC, which has a high content of zeolite-X, can be obtained. The chelating agent can inhibit Cainterference for zeolite synthesis by Ca-masking, and the product with high content of zeolite-X can be obtained from waste sandstone cake using alkali fusion.

Słowa kluczowe

EN

zeolite synthesis; waste sandstone cake; alkali fusion; EDTA; Ca-masking

• Wydawca: Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz
• Czasopismo: Ars Separatoria Acta
• Rocznik: 2007
• Tom: No. 5
• Strony: 76--87
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Wajima T.

autor

Ikegami Y.

• Department of Materials-process Engineering and Applied Chemistry for Environments, Akita University, 1-1, Tegata-Gakuen cho, Akita 010-8502, Japan,

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