Sulfur hydrogenation

Carboxylic acid Thionyl Acyl chlonde Sulfur Hydrogen... 

Polythiodipropionic acids and their esters are prepared from acryUc acid or an acrylate with sulfur, hydrogen sulfide, and ammonium polysulfide (32). These polythio compounds are converted to the dithio analogs by reaction with an inorganic sulfite or cyanide. 

Other wet oxidation processes under development as of the mid-1990s include Marathon Oil s Hysulf process which uses an organic solvent to remove the hydrogen sulfide. One significant distinction of the Hysulf process is that in addition to sulfur, hydrogen is produced. 

Sulfur Compounds. All crude oils contain sulfur in one of several forms including elemental sulfur, hydrogen sulfide, carbonyl sulfide (COS), and in aliphatic and aromatic compounds. The amount of sulfur-containing compounds increases progressively with an increase in the boiling point of the fraction. A majority of these compounds have one sulfur atom per molecule, but certain aromatic and polynuclear aromatic molecules found in low concentrations in crude oil contain two and even three sulfur atoms. Identification of the individual sulfur compounds in the heavy fractions poses a considerable challenge to the analytical chemist. 

The specific activity of the sulfur dioxide was 14, 21, and 13% for the elemental sulfur, hydrogen sulfide, and sulfuric acid treated fruit, respectively (Table III). Thus about the same proportion (within experimental error) of sulfur dioxide is derived from the radioactive elemental sulfur and sulfur acids applied in the treatments. 

Synonym(s) Hydrosulfuric acid stink damp sulfur hydride sulfurated hydrogen dihydrogen monosulfide dihydrogen sulfide sewer gas HSDB 1998... 

A mixture of oxadiazoledichlorophosphine and dioxadiazolochlorophosphine treated in situ in pyridine solution with dimethylamine gave a mixture of the corresponding stable amides 102 and 103, which were separated and characterized spectroscopically. Amide 102 reacted under standard conditions with sulfur, hydrogen peroxide, or phenylazide, and then was converted to further respective derivatives 104a-c (Scheme 22) <1999CHE1117>. 

The release of odorous components (i.e., the water-air mass transfer aspects) is dealt with in Chapter 4, and the behavior of sulfur (hydrogen sulfide) was, in this respect, exemplified. Figure 4.4 gives not just an understanding of the release phenomena but also an overall view of the pathways and sinks of sulfur components under sewer conditions. 

The manufacturing processes for liquefied petroleum gas are designed so that the majority, if not all, of the sulfur compounds are removed. The total snlfnr level is therefore considerably lower than for other petrolenm fuels, and a maximnm limit for sulfur content helps to define the prodnct more completely. The snlfnr compounds that are primarily responsible for corrosion are hydrogen snlfide, carbonyl sulfide, and sometimes, elemental sulfur. Hydrogen sulfide and mercaptans have distinctive unpleasant odors. 

Acid Dew Point For fossil fuels, the acid dew point temperature is that temperature at which the actual mixed acid vapor pressure equals the mixed acid vapor saturation pressure. The mixed acid dew point can be approximated by the sulfuric acid dew point (Fig. 24-56). It can be described as a function of the SO3 and water content of the flue gas (Huijbregts). These concentrations result from the sulfur, hydrogen, and free water content of the fuel the relative humidity of the air and the amount of excess air used. Using the equation of Ver-hoff, where T is degrees K and P is mm Hg (see OUces, A.G.) ... 

Iliuta, M.C. and Larachi, P., Solubility of Total Reduced Sulfurs (Hydrogen Sulfide, Methyl Mercaptan, Dimethyl Sulfide, and Dimethyl Disulfide) in Liquids, J. Chem. Eng. Data, 52, 2 (2007)... 

Chemical (Kraft) pulping. Air Total reduced sulfur (hydrogen... 

Corrosion inhibitor Two inhibitors could be used a. Copper corrosion inhibitor to help prevent sulfur, hydrogen sulfide, and mercaptan attack on copper b. Ferrous metal corrosion inhibitor to prevent water/oxygen initiated corrosion of iron and steel system components... 

Thiols (RSH) cleave a( the sulfur-hydrogen bond on irradiation, and this allows the preparation of sulfides by subsequent radical addition to an alkene (5.62). Hydrogen sulfide behaves in the same way (5.631, and long-chain thiols are made commercially for use as modifiers in emulsion polymerization. 

Zone No. Fixed Carbon Volatiles Ash Content Moisture Sulfur Hydrogen Total Carbon... 

Acyl chloride Sulfur Hydrogen dioxide chloride... 

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