NOPR Collection:

Synthesis of organic nitriles from esters over zeolites and modified SiO₂-Al₂O₃ catalysts

Fri, 01 Mar 1996 00:00:00 GMT

Title: Synthesis of organic nitriles from esters over zeolites and modified SiO₂-Al₂O₃ catalysts Authors: Nagaiah, K; Kulkarni, S J; Subrahmanyam, M; Rao, A V Rama Abstract: Benzonitrile and acetonitrile are synthesized from ethyl- benzoate and ethylacetate over HZSM-5 (Si/Al = 30, 150 and 280), HY, H-mordenite, SAPO (TPA-40 type) and modified SiO₂AI₂O₃ catalysts. The typical maximum yields of benzonitrile obtained were 85.4 and 97.1 % over HZSM-5 (30) and ThO₂SiO₂Al₂O₃ catalysts; respectively. The yields of acetonitrile were 80.6 and 79.4'% over HZSM-5 (30) and HY catalysts, respectively. Page(s): 128-130

Slow release urea-Polymeric membrane matrice for clean and efficient utilisation

Fri, 01 Mar 1996 00:00:00 GMT

Title: Slow release urea-Polymeric membrane matrice for clean and efficient utilisation Authors: Vidyasagar, A; Dave, A M; Mehta, M H; Agrawal, Y K Abstract: To minimise the nitrogen losses from the applied urea, the urea granules have been coated with syntheticpolymer like urea form as well as a bio-polymer like Ca-alginate. Subsequently, the nitrogen release of the resultant urea granules in water have been studied over a period of 120h. The corresponding experimental procedure and the results obtained have been discussed. Page(s): 125-127

Synthesis and characterisation of copolymers of glycidyl methacrylate and acrylate comonomers

Fri, 01 Mar 1996 00:00:00 GMT

Title: Synthesis and characterisation of copolymers of glycidyl methacrylate and acrylate comonomers Authors: Deshpande, S M; Athawale, V D Abstract: Glycidyl methacrylate has been copolymerised with ethyl acrylate, n-butyl acrylate and 2-ethylhexyl acrylate in solution at 70°C using benzoyl peroxide as a free radical initiator. The copolymer composition has been determined by proton magnetic resonance spectroscopy, IR spectroscopy, thermogravimetric analysis, gel permeation chromatography and solubility measurement. The adhesive properties of the copolymers have also been studied. Page(s): 121-124

Electrochemical behaviour of inorganic redox systems during fluoride intercalation on graphite in aqueous-methanolic HF solutions

Fri, 01 Mar 1996 00:00:00 GMT

Title: Electrochemical behaviour of inorganic redox systems during fluoride intercalation on graphite in aqueous-methanolic HF solutions Authors: Noel, M; Santhanam, R; Flora, M Francisa Abstract: The electrochemical behaviour of well-polished graphite electrode has been compared with that of an electrode which was roughened by ftuoride intercalation/deintercalation process. 15 MHF aqueous-methanolic medium was employed for the study of intercalation/deintercalation as well as some redox processes containing potassium salt of ferricyanide/ferrocyanide, bromide/bromine and iodide/iodine. In all the three cases, the redox species were found to adhere to the electrochemically roughened electrode surface. SEM studies indicate the formation of small salt crystallites on the surface. The possible impact of such films on other electron transfer processes is discussed. Page(s): 117-120

NOPR Collection:

Synthesis of organic nitriles from esters over zeolites and modified SiO2-Al2O3 catalysts

Slow release urea-Polymeric membrane matrice for clean and efficient utilisation

Synthesis and characterisation of copolymers of glycidyl methacrylate and acrylate comonomers

Electrochemical behaviour of inorganic redox systems during fluoride intercalation on graphite in aqueous-methanolic HF solutions

Synthesis of organic nitriles from esters over zeolites and modified SiO₂-Al₂O₃ catalysts