Publication details

Imobilizovaný katalytický systém pro oxidaci pyridinu a jeho derivátů na pyridin-1-oxidy peroxidem vodíku a způsob jeho přípravy

Title in English Immobilized catalytic system for oxidation of pyridine and derivatives thereof to pyridine-1-oxides by hydrogen peroxide and process for preparing thereof
Authors

PAZDERA Pavel CHMIELOVÁ Marcela

Year of publication 2015
Type Patent
MU Faculty or unit

Faculty of Science

Publisher ÚPV Praha
State Czech Republic
Patent's number 305316
Web http://spisy.upv.cz/Patents/FullDocuments/305/305316.pdf
Description In the present invention, there is provided a catalytic system and use thereof for oxidation of pyridine and methyl-derivatives thereof to corresponding pyridine-1-oxides by hydrogen peroxide, containing an active catalyzing component being represented by mixed heterooxo polyanions of the general formula [(P)ia(Si)ib(B)ic(W)ip(Mo)iq(V)irOi40]ex-, wherein phosphorus is in the oxidation state +5, silicon is in the oxidation state +4, boron is in the oxidation state +3, indices a, b, c are numbers in the range of 0 to 1, wherein the sum of a+b+c=1, tungsten is in the oxidation state +6, molybdenum is in the oxidation state +6, vanadium is in the oxidation state +5, the indices p, q, r are numbers in the range of 0 through 12, wherein the sum p+r+q=12, a x=80-5a-4b-3c-6p-6q-5r, and the mixtures of these hetero polyanions, wherein the active catalyzing component is ion-immobilized on an organic anion-exchange resin. The organic anion-exchange resin is preferably represented by copolymer of divinylbenzene, being preferably selected from the group consisting of a crosslinked methyl styrene-divinylbenzene, crosslinked copolymer acrylate-divinylbenzene, and crosslinked copolymer methacrylate-divinylbenzene. The active catalytic component is immobilized through the mediation of protonized or quaternized oligoamines -[NRCHi2CHi2(CHi2)im]inNRi3e+, wherein m = 0 to 2, n = 1 to 5, and the substituent R is selected from the group consisting of hydrogen and alkyl containing 1 to 4 carbon atoms, and/or through the mediation of quaternary ammonium groups -(NR´i3)e+, wherein R´ is selected from the group consisting of alkyl containing 1 to 4 carbon atoms and 2-hydroxyethyl, bound to the organic anion-exchange resin through the mediation of methylene-CHi2- or carbonyl -(C=O)- functional group. The invention also relates to a process for preparing the above-described catalytic system.
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