| Summary: | <p>The catalyst of palladium supported by allumina that was used to speed up the production of technical grade glyphosate from n-phosphonomethyl iminodiacetic acid (NPMIDA) and hydrogen peroxide (HPz) cannot be expected to be lasting for along time. Consequently, study on the effects and activity of catalyst of palladium supported by allumina reused for consecutive experiments in the production of technical glyphosate from NPMIDAand HPz is necessary. Five grams of NPMIDA,0.3 grams of palladium catalyst, and 85 mLof HzOwere put into a three neck flask. Every 10 minutes, 1 mLof HzOzwas added into the mixture, and total amount of HPz added was 9 mL Subsequently, the reaction was kept lasting for another 15 minutes. The catalyst was filtered, the filtrate was then naturally cooled to room temperature and was added with 130 mLof technical grade ethanol and its filtrate was collected in an ertenmeyer glass. The solution was left overnight for crystal formation. The glyphosate crystals formed were separated from the solution and then they were washed with 40 mL of technical grade ethanol and 40 mL of technical grade ether. The glY'phosate crystal was dried in open air. The amount of crystal glyphosate produced was weighed and the purity was analyzed using WMs spectrophotometer. The catalyst was then reused for next experiments. The activityof catalyst of palladium supported by allumina reused for a consecutive experiments to produce technical glyphosate from NPMIDAand HPz significantly decreased. The deactivation of the catalyst was caused by fouling or poisoning, and was shown by the decreasing of reaction rate constant with time which value at temperature of aooc, 75°
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