2006•Industrial CatalysisRequires access

Influence of modification on behaviors of the catalysts for epoxidation of cis-propenylphosphonic acid for manufacture of phosphonomycin

LI Bao-jun

Abstract

Activated carbon supported phosphotungstic acid(PW/C) catalysts were prepared by in-situ method.Epoxypropylphosphate,a product from epoxidation of cis-propenylphosphonic acid,was added as the modifier during the preparation to obtain modified PW/C catalysts.The catalysts were used for epoxidation of cis-propenylphosphonic acid.The results showed that the catalyst with 5% mass fraction of the modifier enhanced the epoxypropylphosphate yield by 58.4%,with improved stability for repeated use.IR,BET and XRD results indicated that phosphotungstic acid heteropolyacid was the main active catalytic component.

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Key concepts: Phosphotungstic acid, Catalysis, Yield (engineering), Chemistry, Activated carbon, Mass fraction, Nuclear chemistry, Fraction (chemistry)