scholarly journals Ethylene oxide removal by sorption on aluminium oxide

2009 ◽  
Vol 63 (4) ◽  
pp. 337-343
Author(s):  
Zorana Arsenijevic ◽  
Bosko Grbic ◽  
Nenad Radic ◽  
Radmila Garic-Grulovic ◽  
Zeljko Grbavcic
Keyword(s):  
Thermal Stability ◽  
Ethylene Oxide ◽  
Specific Surface ◽  
Temperature Profiles ◽  
Air Stream ◽  
Organic Products ◽  
Oxide Removal ◽  
Derivatives Of ◽  
Adsorbed Ethylene ◽  
Thermal Stability Of

The dynamics of ethylene oxide sorption and desorption on Al2O3 sorbent were investigated. The investigations of ethylene oxide sorption on Al2O3 show that significant sorption appeared above 125?C. The removal of sorbed ethylene oxide from Al2O3 was achieved by continuous increasing of the temperature up to 450?C in air stream. The analysis of desorbed products show that 90% of adsorbed ethylene oxide is converted to CO2 and the rest consists of the three derivatives of ethylene oxide. The exact composition of desorbed organic products will be determined in further investigation. The desorption temperature profiles point out the presence of two exothermic picks, as was confirmed by detection of CO2 and derivates of ethylene oxide at these temperatures. Investigation of textural characteristics and thermal stability of Al2O3 sorbent show that there are no changes of any characteristics of Al2O3 in sorption/desorption operating temperatures regimes. Only at 700?C the specific surface area of Al2O3 decreases of about 10%. This indicates that the investigated Al2O3 is convenient material for removal of ethylene oxide by sorption.

Preparation and Pyrolysis of Stereoisomeric Bromobicyclo[n.1.0]alkanes ( n = 6, 8 , 10)

1987 ◽  
Vol 42 (4) ◽  
pp. 489-494 ◽  
Author(s):  
Eckehard V. Dehmlow ◽  
Roland Kramer
Keyword(s):  
Thermal Stability ◽  
Gas Phase ◽  
Condensed Phase ◽  
Secondary Products ◽  
Gas Phase Reactions ◽  
Stereoselective Reduction ◽  
Derivatives Of ◽  
Thermal Stability Of

Abstract The title compounds la-3c were prepared by stereoselective reduction of the respective dibromides. Pyrolysis gave allylic bromides (8, 9, 11) as primary and dienes (10, 12) as secondary products. Product ratios were independent of the stereochemistry of the starting materials. No differences of the rearrangement rates of the stereoisomers were observed in gas phase reactions of the derivatives of bicyclo[6.1.0]- and bicyclo[8.1.0]alkanes. With the larger bicyclo[10.1.0] derivatives, however, distinct differences in the thermal stability of cis-trans-isomers4c/5c or 2c/3c were found in condensed phase.

Thermal stability of polymers based on vinyl derivatives of silicon

1966 ◽  
Vol 8 (5) ◽  
pp. 976-981 ◽  
Author(s):  
N.S. Nametkin ◽  
N.A. Nechitailo ◽  
S.G. Durgar'yan ◽  
V.S. Khotimskii
Keyword(s):  
Thermal Stability ◽  
Vinyl Derivatives ◽  
Derivatives Of ◽  
Thermal Stability Of

Thermal stability of polyamides based on derivatives of bis-(p-aminophenyl) methane

1978 ◽  
Vol 20 (10) ◽  
pp. 2487-2493
Author(s):  
Yu.N. Sazanov ◽  
G.N. Fedorova ◽  
L.M. Shcherbakova ◽  
G.I. Nosova
Keyword(s):  
Thermal Stability ◽  
Derivatives Of ◽  
Thermal Stability Of

Ethoxy and silsesquioxane derivatives of antimony as dopant precursors: unravelling the structure and thermal stability of surface species on SiO2

2017 ◽  
Vol 19 (12) ◽  
pp. 8595-8601 ◽  
Author(s):  
T. Alphazan ◽  
P. Florian ◽  
C. Thieuleux
Keyword(s):  
Thermal Stability ◽  
Solid State Nmr ◽  
Surface Species ◽  
Elemental Analyses ◽  
Sb Doping ◽  
Controlled Preparation ◽  
Non Destructive ◽  
Derivatives Of ◽  
Thermal Stability Of

We report here the controlled preparation of SiO2 supported Sb-(mono)layers and their thorough characterization (in situ IR, solid-state NMR, elemental analyses) for the non-destructive Sb-doping of semiconductors.

scholarly journals LNA units present in [RP-PS]-(DNA#LNA) chimeras enhance the thermal stability of parallel duplexes and triplexes formed with (2′-OMe)-RNA strands

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22370-22376
Author(s):  
Katarzyna Jastrzębska ◽  
Barbara Mikołajczyk ◽  
Piotr Guga
Keyword(s):  
Thermal Stability ◽  
Thermally Stable ◽  
Derivatives Of ◽  
Thermal Stability Of

3′-O-(2-Thio-1,3,2-oxathiaphospholane) derivatives of 5′-O-DMT-LNA-nucleosides were used to prepare P-stereodefined (RP-PS)-DNA#LNA chimeras, which form thermally stable parallel complexes with (2′-OMe)-RNA matrices.

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