TY - JOUR A1 - Hartmann, A. A1 - Petrov, V. A1 - Buhl, J.-C. A1 - Rübner, Katrin A1 - Lindemann, Mathias T1 - Electrostatic filter ash from silane production as silicate substitute in zeolite chemistry JF - ZAAC Zeitschrift für anorganische und allgemeine Chemie N2 - This paper is a case study of complete substitution of sodium-metasilicate in zeolite Na-A synthesis by an electrostatic filterash (FA) arising in high amounts during silane waste incineration process.The silicate abundant FA is a suitable material for reinsertion in zeolite chemistry. This is shown in the presented investigation by the development of a model reaction process at low temperatures (50–60 °C) and short times (1.5–4 h). The experiments were performed under addition of NaAlO2 and variation of the alkalinity and the reaction period. Characterization and fine tuning of the process was mainly done by studying the kinetics of FA digestion and zeolite crystallization by XRD and chemical analyses (ICP-OES) of solutions and solids. It could be shown that pure FA was mostly dissolved (98%) in 8 m NaOH already after 1 h. Addition of NaAlO2 and crystallization for further 60 min under optimized conditions at 50 °C yielded to a suitable product. It consists of zeolite Na-A (92% by mass) beside some hydrosodalite (8% by mass). According to this low temperature short time process this study is a contribution for the development of energy efficient recycling solutions. KW - Electrostatic filter ash KW - Sodium-metasilicate KW - Zeolites KW - Silanes PY - 2016 DO - https://doi.org/10.1002/zaac.201500803 SN - 0044-2313 SN - 1521-3749 VL - 642 IS - 6 SP - 472 EP - 479 PB - WILEY-VCH Verlag GmbH & KGaA CY - Weinheim AN - OPUS4-38259 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -