7758-99-8Relevant articles and documents
Fungicidal and bactericidal activity of metal diethyldithiocarbamate fungicides: Synthesis and characterization
Rathore,Ishratullah,Varshney,Varshney,Mojumdar
, p. 75 - 81 (2008)
Copper diethyldithiocarbamate, cadmium diethyldithiocarbamate, lead diethyldithiocarbamate, nickel diethyldithiocarbamate and zinc diethyldithiocarbamate have been synthesized. They have been characterized using TG, DTA, IR spectroscopy, X-ray and atomic
Eyring parameters of dehydration processes
Olszak-Humienik, Magdalena,Mozejko, Janina
, p. 171 - 181 (2003)
Thermogravimetry was used in the study of the kinetics of dehydration of MnSO4·5H2O, CuSO4·5H 2O and 3CDSO4·8H2O under static air atmosphere. The values of the kinetic and thermodynamic par
Activation of Dioxygen and Catalytic Oxidation of Ethanol to Acetaldehyde and Hydrogen Peroxide by Copper(I) Complexes containing 2,2'-Bipyridyl and Tertiary Phosphine Ligands
Bhaduri, Sumit,Sapre, Niteen Y.
, p. 2585 - 2586 (1981)
Reactions of (bipy=2,2'-bipyridyl; L=PPh3, PMePh2, PBun3, or PEt3) with O2 alone in dimethylformamide and SO2 plus O2 in dichloromethane lead to the formation of I2 and precipitation of Cu.The complex catalyses the oxidation of ethanol by dioxygen to acetaldehyde and H2O2 in the presence of equimolar quantities of Na.Added phosphine acts as a strong inhibitor and the catalytic decomposition of H2O2 by the complexes leads to their deactivation.A tentative reaction mechanism is discussed.
Kinetic study and mechanism of chalcocite and covellite oxidation process
?ivkovi?,?trbac, Nada,?ivkovi?, Dragana,Velinovski,Mihajlovi?
, p. 715 - 720 (2005)
Results of the experimental investigation of the copper natural sulfide minerals (chalcocite and covellite) oxidation process in the air atmosphere are presented in this paper. Based on data obtained using thermal analysis methods and by construction of P
Synthesis, structural characterisation and thermal decomposition of a new organic-inorganic hybrid material (C5H14N2)[Cu(SO4)2(H2O)4] · H2O
Hajlaoui, Fadhel,Yahyaoui, Samia,Na?li, Houcine,Mhiri, Tahar,Bataille, Thierry
, p. 2113 - 2118 (2009)
The crystal structure of copper sulfate templated by 2-methylpiperazine, (C5H14N2)[Cu(SO4)2(H2O)4] · H2O, was investigated using single crystal X-ray diffraction data.
Vibrational spectra of copper sulfate hydrates investigated with low-temperature raman spectroscopy and terahertz time domain spectroscopy
Fu, Xiaojian,Yang, Guang,Sun, Jingbo,Zhou, Ji
, p. 7314 - 7318 (2012)
In this paper, the vibrational spectra of copper sulfate hydrates (CuSO4xH2O, x = 5, 3, 1, 0) have been investigated with low-temperature Raman spectroscopy and terahertz time domain spectroscopy (THz-TDS). It is found that the four groups of Raman bands between 90 and 4000 cm-1 can be assigned to lattice vibration as well as intramolecular vibrations of a copper complex, sulfate group, and water molecules. The variation of vibrational spectra during the dehydrated process are discussed in detail considering the transformation of the crystal structure, especially the bands between 3000 and 3500 cm-1, which are attributed to the v 1 and v3 modes of water molecules. In addition, as a complement of Raman spectra, the THz spectra at 0.1-3 THz indicate the absorption due to the low-frequency lattice vibration and hydrogen bond.
Thermobalance for teaching purposes
Wiederholt,Fahrney,Skrozki
, p. 541 - 545 (1989)
A thermobalance for teaching purposes was constructed which is able to measure simultaneously the mass and temperature of a sample. The effectiveness of the device is discussed by the TGA curves of the evaporation of acetone, the dehydration of copper sul
Role of liquid water in crystalline hydrate dehydration. Copper sulphate pentahydrate
De Castelnuovo,Harness,McColm
, p. 233 - 247 (2001)
Simultaneous Differential Thermal Analysis/Thermogravimetric experiments carried out on one large single crystal, several small single crystals and powdered crystals of pentahydrate copper sulphate have been used to demonstrate the role that retained liquid water plays in maintaining crystal morphology during dehydration. Measured activation energies for stepwise dehydration in the system show the presence of solution-based transformations provide lower energy paths for the dehydration steps and stress relieving mechanisms. Skeletal anhydrous crystals from large-sized pentahydrate copper sulphate have the same morphology as the starting crystal on complete dehydration at controlled heating rates as long as a solution phase is maintained within the crystal during decomposition. The athermal activation energies, in this work, are in agreement with those obtained by isothermal methods as long as coincident reaction paths for the two techniques are maintained. The literature has been reviewed in the light of this work and a three-stage process is presented to rationalise the conflicting obtained by workers using a variety of different experimental techniques.
Intracrystalline Site Preference of Hydrogen Isotopes in the Water of Crystallization of Copper Sulfate Pentahydrate
Kita, Itsuro,Matsuo, Sadao
, p. 792 - 797 (1981)
Difference in the isotopic partition at the water of crystallization of CuSO4*5H20 (the site preference) was estimated for the hydrogen isotopes.Fractional dehydration of CuSO4*5H2O under vacuum at 0 and 25 deg C was used to determine the isotopic ratio, the amount of dehydrated water, and the rate process of dehydration.The following results were obtained. (1) Two maxima occur in the isotopic ratio in the dehydration range, FA) and one bonded to the sulfate ion through hydrogen bonding (site B) was made.The site preference of hydrogen isotopes (δD.) was concluded to be -32.0+/-5.2 for site A and +22.6+/-20.9 for site B, where the δD value was referred to the isotopic ratio of the mother liquor from which the crystal formed.
Kinetics of salt roasting of chalcopyrite using KCl
Chakravortty,Srikanth
, p. 25 - 35 (2000)
The process of salt roasting appears to be very promising because it lowers the reaction temperature and leads to water soluble chloride salt. This paper presents the kinetics of salt roasting of chalcopyrite using KCl as the chlorinating agent. Isothermal thermogravimetric studies were carded out in the temperature range of 523-773 K under oxygen, static air and argon atmospheres. It is observed that the weight gain is more in the presence of oxygen than in static air. Weight loss is observed when salt roasting is carried out under an inert atmosphere. It is deduced that the reaction is chemically controlled at temperatures below 600 K both under static air and oxygen atmosphere. At higher temperatures, the process is not thermally activated. The weight gain decreases with increase in temperature because of a change in the chemistry of the process. The roasting experiments carried out in a horizontal electric tube furnace under an oxygen atmosphere shows that up to 96% Cu can be recovered from the chalcopyrite by salt roasting with KCl and subsequent water leaching. (C) 2000 Elsevier Science B.V.
