CONDUCTIVITY DATA OF AQUEOUS MIXTURES OF HYDROGEN PEROXIDE AND ORGANIC ACIDS

1931 ◽  
Vol 4 (1) ◽  
pp. 35-38 ◽  
Author(s):  
W. H. Hatcher ◽  
M. G. Sturrock

Preliminary results obtained by measuring changes in conductivity of organic acids mixed with aqueous hydrogen peroxide show a rapid though measurable progression to the attainment of a maximum or minimum within an hour. These establish previous findings, and afford a clue to the conductivity of organic peracids.

1932 ◽  
Vol 7 (3) ◽  
pp. 270-282
Author(s):  
W. H. Hatcher ◽  
E. C. Powell

The conductivities of formic, acetic, propionic and succinic acids and succinic monoperacid have been studied in water and in aqueous hydrogen peroxide solution. These acids all add hydrogen peroxide to form un-ionized complexes which later, with time, lose water to form the so-called peracids of negligible conductivity. The formation of such complexes is dependent solely on the concentration of reagents, the peracid being produced subsequently by loss of water.


1938 ◽  
Vol 16b (8) ◽  
pp. 253-259 ◽  
Author(s):  
W. H. Hatcher ◽  
D. W. MacLauchlan

Solutions of hydrogen peroxide and nitric acid are unstable when the concentration of the latter is greater than 50%. The conductivities of nitric acid solutions of concentrations lower than this value in water and water-peroxide mixtures have been determined, and the results indicate the formation of one or more unstable peroxides or peracids apparently incapable of ionizing.


Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.


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