Preparation and characterization of nanocrystalline NiO by the thermal decomposition of oxalate salts for the dehydrogenation of 2-butanol to methyl ethyl ketone

Rates and products have been determined for the thermal decomposition of sec-butyl peroxide at 110–150 °C in several solvents.The decomposition was shown to be unimolecular with energies of activation in toluene, benzene, and cyclohexane of 35.5 ± 1.0, 33.2 ± 1.0, 33.8 ± 1.0 kcal/mole respectively. The activation energy of thermal decomposition for the deuterated peroxide was found to be 37.2 + 1.0 kcal/mole in toluene.About 70–80% of the products could be explained by known reactions of free alkoxy radicals, and very little, if any, disproportionation of two sec-butoxy radicals in the solvent cage could be detected.The other 20–30% of the peroxide yielded H2 and methyl ethyl ketone. The yield of H2 was unaffected by the nature or the viscosity of the solvent, but H2 was not formed when s-Bu2O2 was photolyzed in toluene at 35 °C nor when the peroxide was thermally decomposed in the gas phase.α,α′-Dideutero-sec-butyl peroxide was prepared and decomposed in toluene at 110–150 °C. The yield of D2 was about the same as the yield of H2 from s-Bu2O2, but the rate of decomposition (at 135 °C) was only 1/1.55 as fast.Mechanisms for hydrogen production are discussed, but none satisfactorily explains all the evidence.

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Study of thermal decomposition of methyl ethyl ketone peroxide using DSC and simulation

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2006.06.103 ◽

2007 ◽

Vol 142 (3) ◽

pp. 765-770 ◽

Cited By ~ 32

Author(s):

Jo-Ming Tseng ◽

Ying-Yu Chang ◽

Teh-Sheng Su ◽

Chi-Min Shu

Keyword(s):

Thermal Decomposition ◽

Methyl Ethyl Ketone ◽

Methyl Ethyl Ketone Peroxide ◽

Methyl Ethyl

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Preparation and Characterization of New Carrier Drug Polymers Based Maleimide and Its Drug Release Behaviour

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21638 ◽

2019 ◽

Vol 31 (3) ◽

pp. 569-574 ◽

Cited By ~ 4

Author(s):

Fatimah Abdul Razzak Mageed ◽

Mohanad Musa Kareem ◽

Mohammad N. Al-Baiati

Keyword(s):

Free Radicals ◽

Drug Release ◽

Methyl Ethyl Ketone ◽

Controlled Drug Release ◽

Polymerization Reaction ◽

Methyl Ethyl Ketone Peroxide ◽

Methyl Ethyl ◽

Ft Ir ◽

Heterogeneous Polymers

In this work, two new drug substituted monomers and new homogenous and heterogeneous polymers were synthesized loaded with medicinal properties to extend the controlled drug. The first step includes preparation of compound (F1) via reaction of maleic anhydride with 4-aminobenzoic acid. Then compound (F1) was converted to its corresponding acyl chloride derivative which reacted with amino drugs (sulfadiazine, chlordiazepoxide) afforded (F2 and F3) monomers. Homogeneous polymers (F8 and F9) prepared through polymerization reaction of free radicals of the monomers (F2 and F3) under nitrogen using methyl ethyl ketone peroxide (MEKP) as initiator. Heterogeneous polymers (F14 and F15) prepared through polymerization reaction of free radicals of the monomers (F2 and F3) separately with acrylic acid under nitrogen using methyl ethyl ketone peroxide (MEKP) as initiator. All these prepared monomers and polymers were characterized by FT-IR and 1H NMR, 13C NMR spectroscopies. Controlled drug release and swelling % was studied in different pH values at 37 ºC. Intrinsic viscosities were measured at 25 ºC with Ostwald viscometer and applied the characteristic of solubility for these polymers.

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