Reference

Determination of intermediate products from levomycetin synthesis and the study of their chemical stability in natural waters

Determination of intermediate products from levomycetin synthesis and the study of their chemical stability in natural waters. Dyatlovitskaya, F. G.; Maktaz, E. D.; Botvinova, L. E.; Gorshkova, L. I.; Kruchinina, A. A. (Kiev. NII Obshch. Kommunal. Gig., Kiev, USSR). Khim. Tekhnol. Vody, 5(5), 441-2 (Russian) 1983. CODEN: KTVODL. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 60, 63, 80 The 5 intermediate nitrophenyl compds. [1-p-nitrophenyl-2-aminoethanol (I) [16428-47-0], styrene nitrochlorhydrin (II) [84412-10-2], p-nitrostyrene oxide (III) [6388-74-5], nitrophenyl ethylene glycol (IV) [88057-19-6], and 1-p-nitrophenyl-2-acetamidoethanol (V) [41578-77-2]] from levomycetin [56-75-7] synthesis were detd. sep. by extn. and thin-layer chromatog. on silufol. The detection limit for I was equiv. to the permissible water concn. of 0.5 mg/L; the detection limit for the other compds. was 0.1; max.Several substances with their cas registry numbers 84412-10-2 and 56-75-7 may be metioned in this study. permissible concns. are lacking for III and IV, for II and V the stds. are 0.2 and 1.0 mg/L, resp. Styrene chlorhydrin VI [1674-30-2] was detd. with a detection limit of 2-5 mg/L by hydrolysis in alk. soln., oxidn. of the resultant glycol, and reaction of the product with chromotropic acid. Dichloroethane [1300-21-6], another common compd. in levomycetin synthesis wastewaters, was detd. by hydrolysis at high pressure, oxidn., and reaction with chromotropic acid. In tests at 20° in an aquarium with mineralized water, similar to the condition of a lake receiving the wastewaters, the degrdn. of II, V, and I was the same in the presence and absence of sediments, indicating that they are not adsorbed; evapn. was a more important factor. After 20 days, V decompd. to I and II to IV. The chem. stability of VI in open systems in the absence of sediments was very high: degrdn. took 40 days. .

Extraction of cyanide ion-associative complexes of metals with pyrazolone derivatives

Extraction of cyanide ion-associative complexes of metals with pyrazolone derivatives. Akimov, V. K.; Tela, N. M.; Dolidze, L. Sh. (NII Org. Poluprod. Krasitel., Moscow, USSR).Several reagents with their cas registry numbers 1606-56-0 and 7439-96-5 are used here. Izv. Akad. Nauk Gruz. SSR, Ser. Khim., 9(4), 256-62 (Russian) 1982. CODEN: IGSKDH. DOCUMENT TYPE: Journal CA Section: 54 (Extractive Metallurgy) The effect of different factors on extn. of cyanide complexes of metals with dichloroethane [1300-21-6] in the presence of pyrazolone [39455-90-8] derivs. is described. Those factors are: (a) structure of a complex cyanide metal anion; (b) pH of the soln.; (c) concn. of CN- and reagent; and (d) cation (HL)+, where L is diantipyrylmethane [1251-85-0], methyl diantipyrylmethane [1606-56-0], propyl diantipyrylmethane [1461-17-2], or phenyl diantipyrylmethane [1861-84-3]. .