Organic sulphur

Substitution reactions, aromatic, hydrogen isotope effects in, 2, 163 Substitution reactions, bimolecular, in protic and dipolar aprotic solvents, 5,173 Sulphur, organic oxyacids of, and their anhydrides, mechanisms and reactivity in reactions of, 17, 65... 

Sulphur, organic oxyacids of, and their anhydrides, mechanisms and reactivity in reactions of,... 

The catalytic conversion of heavy hydrocarbons, such as heavy oil or sulphurous organic residues, from the oil industry via steam reforming is not feasible because solid carbon starts to be deposited at temperatures above 800 °C, which renders the catalyst inactive in a short period of time and, furthermore, blocks the gas flow in the reactor. Heavy hydrocarbons are, therefore, converted to hydrogen using partial oxidation (POX). Note that in refineries the term gasification is more commonly used partial oxidation is the scientific terminology. 

Calvert S. E. and Karlin R. E. (1991) Relationships between sulphur, organic carbon, and iron in the modern sediments of the Black Sea. Geochim. Cosmochim. Acta 55,... 

Many other sulphur-organic reagents have found use in the determination of Ru, e.g., rubeanic acid [44] and unithiol [45]. 2-Thiobarbituric acid has been used in a method based on derivative spectrophotometry [46]. Dithizone (at 85 C) forms with Ru a complex extractable into CHCI3 [47]. 

Dithizone has been utilized not only for the separation of thallium but also for its determination [16,42], The molar absorptivity of TlHDz in CHCI3 is 3.710 at max 505 nm. Interfering species include Pb, Bi, and Sn(II). Other sulphur-organic reagents proposed for determining T1 include thiodibenzoylmethane [43] and thio-HTTA [44],... 

Sulphur organic compounds are very sensitive to pH (Fig. 66). As the acidic form absorbs differently from the basic one, it is possible to calculate the pKa value of these compounds. The example of thiophenol is given, and the estimated pKa value is close to 6.2 (Fig. 66). 

Charrid-Duhaut,A.,Connan,J.,Damell,M.,Spangenberg, J.,Szymczyk,E.,Bissada,A.,Albrecht,P. (2009) Molecular and isotopic characterization of organic samples from the wreck of the Saint-Etienne merchant ship (XVIIIth century) identification of pitch, fat, hair and sulphur. Organic Geochemistry, 40,647-665. 

Lithium-sulphur Organic 2.8 Flat SAFT LX 16/34 1000 1 to lOOmA -40 to 4-55 Cylinder 16x34 5.60... 

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