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Title: Improvement in optical brightness of fly ash based zeolite-A for use as detergent builder
Authors: Udhoji, J S
Bansiwal, A K
Meshram, S U
Rayalu, S S
Keywords: Zeolite-A
Fly ash
Optical brightness
Detergent builder
Issue Date: May-2005
Publisher: CSIR
IPC CodeB 29 D 11/00
Abstract:  A process has been formulated for synthesis of fly ash-based Zeolite-A (FAZ-A), whose optical brightness (58.2%) is slightly less for use as detergent builder. Attempts have been made to improve the optical brightness (OB) of FAZ A samples using pretreatment of fly ash (FA) through magnetic separation of iron, acid treatment and lime treatment to control colour development in zeolite sample. Treatment of FA and FAZ-A samples has also been attempted by EDTA chelation technique to control iron content. OB, iron content and cation binding capacity (CBC) in FAZ-A sample are crucial and diagnostic parameters for assessing their use as detergent builder. Treatment methodologies have therefore been standardized for improvement in OB as a trade-off between CBC and iron content depending upon the end use of zeolite-A.
Page(s): 367-371
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.64(05) [May 2005]

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