It was suggested that the desulfurization of 2-thiopyrimidine nucleosides 167 with N-sulfonyloxaziridine 33 proceeds via the initial formation of a sulfur oxyacid followed by subsequent decomposition to 168 and sulfur dioxide. This was confirmed by the experiment where, 2′,3′,5′-O-tribenzoyl-...
(by impregnation or residual ions from the preparation) were characterized with respect to their acidic properties (n-butylamine adsorption at 373 K, gravimetric method), basic properties (sulphur dioxide chemisorption at 373 K, volumetric method) and textural properties (surface area and pore size ...
Compounds of formulaI(I), wherein the substituents are as defined in claim 1, and the agrochemically acceptable salts, stereoisomers, enantiomers, tautomers and N-oxides of t
In acient days,H(2)SO(4) was called oil of vitriol as it was prepared by distilling ferrous sulphate (Green vitriol ) 2FeSO(4).7H(2)O overset(Delta)rarr Fe(2)O(3)+underset("(Oil of virtol)")(H(2)SO(4))+SO(2)+13H(2)O By far the most important commerci
, or a mercury containing gaseous stream to which a sulphur compound has been added to effect mercury absorption. Suitable liquid streams include mercury containing LPG and naphtha streams. Other fluid streams that may be treated include mercury-containing nitrogen, argon, helium and carbon dioxide....
the reactivity of aqueous NaOH or aq.KOH or of aq. Ca(OH)2can vary depending upon the nature of the constituents present in coal ash. As low as 3.3% ash content was obtained from the Tuncbilek lignite which was treated with 30% aq.NaOH followed by 10% HCl treatment (Karaca and Yildi...
Compounds of formula (I) wherein the substituents are as defined in claim 1, and the agrochemically acceptable salts, stereoisomers, enantiomers, tautomers and N-oxides of th
sulphidic ores and mine wastes. Some studies suggest that such neutrophilic sulphur-oxidising bacteria are responsible for the first series of oxidation processes that reduce the pH of fresh sulphidic mine habitats from alkaline (or circumneutral) to acidic values, before the prevalence of acidophilic...
When an adsorbent such as activated carbon is treated or impregnated using a suitable basic solution, such as NaOH and KOH, the adsorption capacity of the activated carbon is further enhanced, since additional sulphide oxidation processes are occurring via the formation of sulphide salts according to...
We present an integrated approach to characterizing the Žvepovnik sulphur spring, comprising detailed basic geological (mapping), geochemical (physico-chemical, elementary), isotopic (δ2H, δ18O, δ13CDIC, δ34S and 3H), and microbiological analyses.