Zobrazeno 1 - 10
of 22
pro vyhledávání: '"V. P. Nekhoroshev"'
Autor:
V. P. Nekhoroshev, Ilya E. Nifant'ev
Publikováno v:
Russian Journal of Applied Chemistry. 94:217-222
A procedure was developed for preparing resorcinolpyromellitein [3,3,7,7-tetrakis(4-hydroxy-2,2ʹ-oxydiphenyl)pyromellitide] by acylation of resorcinol with pyromellitic dianhydride using tin tetrachloride as a catalyst (120–210°С, 30 h, reactant
Publikováno v:
Petroleum Chemistry. 59:1240-1244
The acylation of o-cresol with pyromellitic dianhydride (PMDA) has been experimentally studied. The optimum conditions of the acylation reaction of o-cresol with PMDA have been determined. The synthesis has been performed in o-cresol melt at 120°C f
Publikováno v:
Petroleum Chemistry. 58:400-406
An experimental study on obtaining concentrates of organic compounds from fuel fractions of petroleum by complexation with metal halides: aluminum chloride, aluminum bromide, anhydrous zinc chloride, and its crystal hydrate has been performed. Optima
Publikováno v:
Petroleum Chemistry. 57:643-648
The results of experiments on chemical modification of viscous road asphalts with atactic polypropylene (APP) obtained by polymerization over a titanium–magnesium catalyst are presented. It has been shown that the preparation of an asphalt–polyme
Autor:
E. O. Voronkov, O. Kh. Poleshchuk, Ilya E. Nifant'ev, O. I. Tarasova, A. G. Yarkova, R. R. Gubaidullin, A. V. Nekhorosheva, V. P. Nekhoroshev
Publikováno v:
Petroleum Chemistry. 57:272-277
Thianthrene has been synthesized by reacting diphenyl sulfide with AlCl3 in heptane at 98°C for 8 h at a diphenyl sulfide: AlCl3 molar ratio of 2: 1; the thianthrene yield is 58%. The reaction mechanism proposed previously has been confirmed by quan
Autor:
O. Kh. Poleshchuk, A. K. Gasparyan, A. V. Nekhorosheva, S. V. Nekhoroshev, A. G. Yarkova, V. P. Nekhoroshev
Publikováno v:
Russian Journal of Applied Chemistry. 88:711-718
New chemical markers based on mixtures of individual phthaleins were developed. These markers are characterized by high level of secrecy in use, good transferability to contacting persons, enhanced retention on the objects marked, and reliable identi
Publikováno v:
Journal of Analytical Chemistry. 66:1196-1200
The composition of methanol extracts of Spice aromatic smoking blends was studied by chromatography-mass spectrometry. The following compounds from the group of new synthetic cannabinoids were identified: 1-pentyl-3-(1-naphthoyl)indol, 1-butyl-3-(1-n
Publikováno v:
Russian Journal of Applied Chemistry. 84:461-467
The composition and structure of low-molecular-weight products of thermal oxidative degradation of atactic polypropylene were studied.
Publikováno v:
Journal of Analytical Chemistry. 65:988-994
The actual situation and prospects of identification with the use of chemical labeling are discussed in detail for substances, composites, and final articles.
Publikováno v:
Journal of Analytical Chemistry. 64:1007-1011
A procedure for the identification of gasoline samples containing hidden chemical markers based on the results of fuel analysis by gas-liquid chromatography with sample preevaporation is proposed. Tetracosane (C24H50) in a concentration of 2.0 × 10