Surface-modified zeolite and process for synthesis thereof for sequestration of anions

Publication: US-7510659-B2 on Google Patents
Filed / published / granted: 2006-08-23 / 2009-03-31 / 2009-03-31
Offices: US
Applicants: CSIR (Council of Scientific & Industrial Research) (IN, government-rd)
Minerals: General metallurgy (mineral unspecified)
Stages: Compounds and materials
Waste stream: Coal fly ash and coal rejects
CPC: C02F2101/103, C01B39/026, C02F1/281, B01J20/186, C02F2103/06
Abstract (first 170 chars): Present invention deals with cost-effective surface-modified zeolite materials developed from commercial zeolites and flyash-based zeolites by treating with surface modifiers like hexadecyltrimethyl ammonium bromide (HDTMA-Br). The formation of zeolitic materials with anionic characteristics requires treatment with a surfactant with initial concentrations greater than its critical micelle concentration (CMC). The sorption of oxyanions on the surfactant-modified zeolite (SMZ) is attributed to surface complexation and surface precipitation. Incorporation of metal ions on SMZ showed improved anio

Why it is labelled this way

Decided by cpc-rules: Metallurgy classes (C22B) without a named mineral.

Source: Google Patents Public Data (BigQuery), CC BY 4.0.