Sulfides, organic hydrogenation

This is a process mainly used in power plants for removal of ions by forming insoluble salts. Common precipitating agents are lime, hydrogen sulfide, organic precipitants, and sods ash. Optimum pH depends on the ions to be removed. The removal efficiency for inorganic pollutants is as follows ... 

In such experiments, a preliminary preparation of the often difficulty obtainable pure thioaldehydes is not actually necessary. It suffices to bring the fermenting yeast in contact with the ordinary (non-thio) aldehydes and with ammonia and hydrogen sulfide (ammonium hydrogen sulfide). Such conditions frequently apply for animals and plants, for example, in bacteriological processes and probably also in the metabolism of higher organisms. 

Ammonium salts, adds, powdered metals, sulfur, finely divided organic or combustible materials Acetic acid, naphflialene, camphor, glycerol, alcohol, and flammable liquids in general Ammonia, methane, phosphine, hydrogen sulfide Acetylene, hydrogen peroxide... 

For instance in hot brine from the French Dogger, where reduced sulfur species [hydrogen sulfide, organic and inorganic polysulfides, elemental sulfur, thiosulfate) were found, there was a good agreement between analytical and electrochemical results as can be seen from the comparison of the data of Table II and Figures 11 and 12 [18). 

In the United States, the cost for water treatment and delivery is generally in the range of 1.00-1.50 per 1000 gal. The additional cost for removing organics, hydrogen sulfides, and carbon dioxides with PTA are within this cost but can significantly increase this cost for water. The costs for PTAs are presented in Table 12 for treatment of dibro-mochloropropane, trichloroethylene, vinyl chloride, and radon. As shown in this table, the additional costs per 1000 gal for flows of 0.1, 0.5, 1.0, and 10.0 MGD are within the... 

The influence of these inhibitors is known to increase in the following order saturated hydrocarbons, monoaromatics < condensed aromatics, oxygen compounds, hydrogen sulfide < organic sulfur compounds < basic nitrogen compounds. Three of these inhibitor classes are discussed here. 

Oxidation of organic sulfides with hydrogen peroxide, over Ti-containing zeolites, may be a selective, mild and facile method for preparing sulfoxides. The reactivity of thioethers is in... 

The majority of sulfur found in cloud and rainwater is sulfate (see later), while some sulfite (10-30 % of the total) has also been identified. It is believed that the quantity of sulfate ions found in rainwater samples at the surface is practically independent of reduced sulfur species (hydrogen sulfide, organic sulfides) because of their limited solubility. In other words this means that the wet removal of these compounds is expected to be unimportant (Hales, 1978). 

World Health Organization Hydrogen Sulfide Environmental Health Criteria 19. Geneva, World Health Organization, 1981... 

A. Poisoning by impurities brought into the system with the synthesis gas, for example dust, tar, resin formers, hydrogen sulfide, organic sulfur compounds, and chlorine and other elements. 

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