IR@NEIST - North East Institute of Science and Technology (CSIR)
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Sulphate behaviour from dissolution of gypsum in organic acids
Get PDFThe solubility of gypsum in organic acids namely acetic, oxalic, tartaric and
succinic acids at low temperature (3
Cleaning of Indian coals by agglomeration with xylene and hexane
Get PDFA laboratory scale agglomeration process has been undertaken for
cleaning Indian coals using oils namely, xylene and hexane.
Maximum organic matter recovery for xylene has been found to be
91.9% whereas with hexane, the value is 54.7% on a dry basis. The
highest ash rejection values with xylene (90.7%) and with hexane
(89.7%) are almost same. Promising results for rejection of metals
(Fe, Mg and Zn) have been observed. It has been found that xylene
is more selective than hexane for the agglomeration process.
Knowledge gained from this study will be helpful for technological
advancement of this kind of work
Cultivation of Candidalangeronii in sugar cane bagasse hemicellosic hydrolyzate for the production of single cell protein
Get PDFNovel synthesis of active metal oxide surface from a self-organising system of inorganic solids
Get PDFSelf-organising aqueous suspension of layers of cationic montmorillonite and anionic mixed metal layered hydroxides
�MMLH. after thermal treatment at about 5008C gives active and well-dispersed layers of metal oxides over montmorillonite
matrix exhibiting enhanced reactivity with gaseous reactants. Increased absorption of H2S by ZnO supported on montmorillonite
matrix is given as an exampl
Rhodium(I) carbonyl complexes of triphenylphosphine chalcogenides and their catalytic activity
Get PDFRhodium(I) carbonyl complexes [Rh(CO)2ClL] where L = Ph3PO, Ph3PS and Ph3PSe, were synthesized and
characterized by elemental analysis, i.r. and by 1H-, 13C- and 31P-n.m.r. spectroscopy. The m(CO) band frequencies
in the complexes follow the order: Ph3PO > Ph3PS > Ph3PSe, in keeping with the hard/soft nature of the
interactions. The complexes undergo oxidative additions with electrophiles such as MeI, PhCH2Cl and I2 to give,
e.g. [Rh(CO)(COMe)ClIL] which react with PPh3 to give trans-[Rh(CO)Cl(PPh3)2]. The catalytic activity of the
[Rh(CO)2ClL] complexes in carbonylation of MeOH is higher than that of the well-known [Rh(CO)2I2]ÿ specie
Viscosity of trioxalato complexes of Al(III), Fe(III), Co(III) and Cr(III) between 15 and 35 degree Centigrade
Get PDFBibliometric study of the doctoral dissertations in organic chemistry submitted by S T workers of RRL, Jorhat to evaluate the utility factor of the library Bibliometric study of the doctoral dissertations in organic chemistry submitted by S T workers of RRL, Jorhat to evaluate the utility factor of the library
Get PDFAdsorption of Cr(VI) by layered double hydroxides
Get PDFAdsorption of Cr�VI. by various uncalcined and calcined layered double hydroxides �LDH. of
Mg 13Al, Ni 13Al and Zn 13Cr types was investigated. Adsorption of Cr2O72y through ion exchange
in uncalcined LDH is slower in rate and smaller in amount than in calcined one where the
adsorption occurs via rehydration. The nature and content of bi- and trivalent metal ions in LDH
influence the adsorption. Calcined Mg 13Al LDH with higher Al3q content in the precursor
structure shows higher adsorption capacity. Adsorption is higher in the Mg 13Al LDH than in
Ni 13Al and Zn 13Cr LDH. A two-step first-order rate kinetics was observed for the adsorption
process which follows the Freundlich-type adsorption isotherm. The explanation of adsorption
phenomenon has been supported by X-ray diffraction patterns. The pH of initial Cr2O72y solution
has no affect on adsorption by calcined LDH. Release of Cr2O72y from the adsorbed product
depends upon the type of anion in the aqueous phase and CO32y being the most effective ion.
Calcination of the Cr2O72y adsorbed product up to 12508C has not resulted in the formation of
Cr-immobilized phase
Continuous cultivation of the candida utilis at different dilution rates in pineapple cannery effluent
Get PDFA protocol for micropropagation of Alpinia galanga
Get PDFEmerging buds of rhizome of Alpinia galanga Willd produced shoots and roots simultaneously when cultured in
MS medium supplemented with kinetin 3.0 mg