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The following is a novel synthesis method for GBL.
excerpt:
source:
I have a question about this procedure. Is it possible to use a lower concentration of hydrogen peroxide such as 30% instead of 50% due to regulatory reasons while adjusting the amount of H2O2 used in the reaction?
excerpt:
In to a 100 ml round-bottomed double necked flask containing, THF (0.02 mol,
1.44g), 50% aq. hydrogen peroxide (0.06 mol, 4.08g) and Se02 ( 15mol%, 0.22g).
The reaction was continued with vigorous stirring at 35 oc for 15h. The reaction
mixture was then filtered through a Buckner funnel, passed through a short
column of silica gel to remove the catalyst and concentrated under reduced
pressure. The resulting residue was analyzed by high resolution GCMSD, El,
quadrapole mass analyzer, EM detector. The conversion of THF to GBL was
determined on the basis of the weight of the residue left after evaporation and
selectivity for GBL formation was determined by GC. Based on these analyses,
the conversion of THF was found to be 88 % with the 100 % selectivity for the
formation of GBL.
source:
An Improved Process For The Production Of Gamma Butyrolactone - Patent
The present invention relates to an improved process for the synthesis of highpurity gamma-butyrolactone by the liquid phase oxidation of tetrahydrofuranwith hydrogen peroxide as environmentally benign oxidant in the presence ofcatalytic amount of selenium (IV) oxide in the temperature range ambient
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I have a question about this procedure. Is it possible to use a lower concentration of hydrogen peroxide such as 30% instead of 50% due to regulatory reasons while adjusting the amount of H2O2 used in the reaction?