Electrostatic Filter Ash from Silane Production as Silicate Substitute in Zeolite Chemistry

Abstract

Abstract. This paper is a case study of complete substitution of sodium-metasilicate in zeolite Na-A synthesis by an electrostatic filter ash (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 NaAlO 2 and variation of the alkalinity and the reaction period. Characterization and fine tuning of the process was mainly

Low Temperature Synthesis of Zeolites of the Faujasite Family (FAU-EMT) Using Industrial Mineral Waste (FR) from Silane Production

“…A high content of SiO 2 and sometimes also Al 2 O 3 as well as sodium, potassium or calcium, favors these residues as substitutes within the educts of zeolite synthesis but always only under the basic requirement that their chemical composition is without elements or components being harmful to the environment. Newly even wastes like paper sludge combustion ash [9] [10] [11] [12] [13] and filtration residues from industrial waste water cleaning [14] as well as electrostatic filtration ash from combustion of silane production residues [15] were involved in those experimental studies. Important zeolites like LTA, Na-P, SOD or Li-ABW could be prepared therefrom.…”

“…The authors inserted pure synthesis chemicals in their experiments. Newly this superalkaline low temperature method was revealed for zeolite formation from industrial wastes like paper sludge combustion ash or silica rich filtration residues from industrial waste water cleaning and already the residue FR of the present paper was tested here [13] [14] [15].…”