Layered Ni(ii)-Zn(ii) hydroxyacetates. Anion exchange and thermal decomposition of the hydroxysalts obtainedElectronic supplementary information (ESI): PXRD and FTIR of all four NiZn samples; PXRD of calcined chloride, bromide, carbonate and nitrate samples. See http://www.rsc.org/suppdata/jm/b1/b110145e

2002 ◽  
Vol 12 (4) ◽  
pp. 1071-1078 ◽  
Author(s):  
Ricardo Rojas ◽  
Cristobalina Barriga ◽  
Maria Angeles Ulibarri ◽  
Pilar Malet ◽  
Vicente Rives
Keyword(s):  
Thermal Decomposition ◽  
Anion Exchange ◽  
Supplementary Information

Design and Research of Spent Resin Conical Dryer Device

2017 ◽  
Author(s):  
Yan Zhou ◽  
Haifeng Zhang
Keyword(s):  
Thermal Decomposition ◽  
Cation Exchange ◽  
Water Content ◽  
Anion Exchange ◽  
Vacuum Drying ◽  
Drying Process ◽  
Anion Exchange Resins ◽  
Cation Exchange Resins ◽  
Exchange Resins ◽  
Spent Resin

This paper introduced the design and research of spent resin conical dryer which was based on the analysis of the thermal decomposition characteristics of resins. The drying experiment of non-radioactive cation exchange resins and anion exchange resins was also carried out in this study. The result showed that the water content of resins reduced from about 55%(wt) to 8.5%(wt) and the volume reduction ration reached 2.17 with a drying end temperature of 90°C, which preliminarily verified the feasibility of the vacuum drying process and conical dryer device for treating radioactive spent resins.

scholarly journals “Intrinsic” Anion Exchange Polymers through the Dissociation of Strong Basic Groups: PPO with Grafted Bicyclic Guanidines

Membranes ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 57 ◽  
Author(s):  
Riccardo Narducci ◽  
Gianfranco Ercolani ◽  
Raul Andres Becerra-Arciniegas ◽  
Luca Pasquini ◽  
Philippe Knauth ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Nmr Spectroscopy ◽  
Ionic Conductivity ◽  
Anion Exchange ◽  
Benzyl Chloride ◽  
Butyl Lithium ◽  
Basic Group ◽  
Phenylene Oxide ◽  
Amine Groups ◽  
Anion Conductivity

We synthesized anion exchange polymers by a reaction of chloromethylated poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with strongly basic 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). TBD contains secondary and tertiary amine groups in the guanidine portion. To favor the functionalization with the secondary amine, TBD was activated with butyl lithium. The yield of amine formation via the reaction of the benzyl chloride moiety with TBD was 85%. Furthermore, we prepared polymers with quaternary ammonium groups by the reaction of PPO-TBD with CH3I. The synthesis pathways and ionomer structure were investigated by NMR spectroscopy. The thermal decomposition of both ionomers, studied by thermogravimetry, started above 200 °C, corresponding to the loss of the basic group. The ion exchange capacities, water uptake and volumetric swelling are also reported. The “intrinsic” anion conductivity of PPO-TBD due to the dissociation of grafted TBD was in the order of 1 mS/cm (Cl form). The quaternized ionomer (PPO-TBD-Me) showed an even larger ionic conductivity, above 10 mS/cm at 80 °C in fully humidified conditions.

Thermal decomposition of anion-exchange resin based on copolymer of 4-vinylpyridine

2016 ◽  
Vol 89 (4) ◽  
pp. 554-558
Author(s):  
I. A. Blinov ◽  
V. M. Belokhvostov ◽  
A. A. Kossoy ◽  
D. A. Mukhortov ◽  
M. P. Kambur ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Anion Exchange ◽  
Exchange Resin ◽  
Anion Exchange Resin

Applications of Photoelectron Microscopy

1976 ◽  
Vol 34 ◽  
pp. 506-507
Author(s):  
William J. Baxter
Keyword(s):  
Electron Microscopy ◽  
Thermal Decomposition ◽  
Chemical Composition ◽  
Ultraviolet Radiation ◽  
Thin Layer ◽  
Edge Effects ◽  
Electron Optics ◽  
Surface Layers ◽  
Crystalline Orientation ◽  
Fluorescent Screen

In this form of electron microscopy, photoelectrons emitted from a metal by ultraviolet radiation are accelerated and imaged onto a fluorescent screen by conventional electron optics. image contrast is determined by spatial variations in the intensity of the photoemission. The dominant source of contrast is due to changes in the photoelectric work function, between surfaces of different crystalline orientation, or different chemical composition. Topographical variations produce a relatively weak contrast due to shadowing and edge effects.Since the photoelectrons originate from the surface layers (e.g. ∼5-10 nm for metals), photoelectron microscopy is surface sensitive. Thus to see the microstructure of a metal the thin layer (∼3 nm) of surface oxide must be removed, either by ion bombardment or by thermal decomposition in the vacuum of the microscope.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

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