Influence of tungsten compounds on reaction of 1-octene epoxidation by tert-butyl hydroperoxide and hydroperoxide decomposition

2021 ◽  
Vol 4 (2) ◽  
pp. 23-27
Author(s):  
O. I. Makota ◽  
◽  
L. P. Oliynyk ◽  
Z. М. Komarenska ◽  
◽  
...  

Catalytic ability of tungsten compounds in the reaction of hydroperoxide epoxidation of 1- octene and tert-butyl hydroperoxide decomposition was investigated. It is shown that the nature of ligand has significant effect on the catalytic activity of tungsten compounds in these reactions. It is established that boride and silicide of tungsten are the best choice for epoxidation reaction, whereas tungsten carbide exhibits poor activity. Tungsten boride is also the most active in the hydroxide decomposition reaction.

2016 ◽  
Vol 56 (2) ◽  
pp. 171-174 ◽  
Author(s):  
Kh. E. Kharlampidi ◽  
N. M. Nurullina ◽  
N. N. Batyrshin ◽  
V. I. Anisimova ◽  
I. A. Suvorova

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 636 ◽  
Author(s):  
Gonçalo Tiago ◽  
Ana Ribeiro ◽  
M. C. Guedes da Silva ◽  
Kamran Mahmudov ◽  
Luís Branco ◽  
...  

The copper(II) complexes [CuL(H2O)2]∙H2O (1) and [CuL(dea)] (2) [L = 2-(2-(1,3-dioxo-1H-inden-2(3H)-ylidene)hydrazinyl)benzenesulfonate, dea = diethanolamine] were applied as catalysts in the peroxidative (with tert-butyl-hydroperoxide or hydrogen peroxide) conversion of cyclohexane to cyclohexanol and cyclohexanone, either in acetonitrile or in any of the ionic liquids [bmim][NTf2] and [hmim][NTf2] [bmim = 1-butyl-3-methylimidazolium, hmim = 1-hexyl-3-methylimidazolium, NTf2 = bis(trifluoromethanesulfonyl) imide]. Tert-butyl-hydroperoxide led to better product yields, as compared to H2O2, with a selectivity directed towards cyclohexanone. The ILs showed a better performance than the conventional solvent for the copper complex 1. No catalytic activity was observed for 2 in the presence of an IL.


2010 ◽  
Vol 35 (3) ◽  
pp. 345-348 ◽  
Author(s):  
Yuriy Trach ◽  
Oksana Makota ◽  
Jadwiga Skubiszewska-Zięba ◽  
Tadeusz Borowiecki ◽  
Roman Leboda

1984 ◽  
Vol 49 (2) ◽  
pp. 404-409 ◽  
Author(s):  
Jiří Pavlinec ◽  
Milan Lazár

The radical polymerization of methyl methacrylate may be efficiently initiated by tert-butyl-hydroperoxide at 40°C and lower, deep below the temperatures of spontaneous hydroperoxide decomposition, when sulphuric acid simultaneously with ketones is used as the activator of peroxide decomposition. The initial reaction rate depends on concentration of initiator components, the exponents with regard to tert-butyl hydroperoxide, sulphuric acid and acetone being 0.25, 0.5 and 0.5, respectively. Water retards the hydroperoxide decomposition very efficiently and the polymerization rate is inversely proportional to the square root of water concentration in the system. Within the concentration range of hydroperoxide (1. 10-3 - 3. 10-2 mol dm-3), sulphuric acid 2.62 . 10-2 mol dm-3 and acetone 0.2 mol dm-3 the observed initial polymerization rate varies from 14.4%/hour to 34.5%/hour at 40°C. The concentration of water, introduced into the system by the polymerization components, was 0.05% in all cases. The activating effect of ketones upon the acid catalyzed hydroperoxide decomposition is accounted for by the formation of ketone-H2SO4 adduct that facilities the decomposition of hydroperoxide.


2011 ◽  
Vol 19 (5) ◽  
pp. 677-682 ◽  
Author(s):  
Gaffar Imran ◽  
Muthusamy Poomalai Pachamuthu ◽  
Rajamanickam Maheswari ◽  
Anand Ramanathan ◽  
S. J. Sardhar Basha

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