Processes Free Full-Text Characteristics and Treatment
Sulfur compounds are removed from petroleum by the addition of sodium hydroxide at a very high concentration. As a result, a residue called spent soda or spent caustic is generated, being extremely aggressive to the environment. In this work, the chemical properties of this residue are described in detail. The sodium hydroxide remains that have not reacted,
Figure 4 shows the breakthrough curves for sulfur present in the SSC (0,7 mol L-1 SH-) and 1 mol L-1 Na 2 S (in 1 mol L-1 NaOH) on the resins. The behavior of the two resins and reference solution was very similar. From data presented in this figure, the average sulfur uptake was 22.5 g L-1 (Dowex 1) and 21.0 g L-1 (Amberlite IRA 420).
Glycosaminoglycans detection methods: Applications of mass
A healthy control sample yields C4S, C6S, and HS. Samples from MPS I and II patients provide more DS and HS. Samples from MPS III patients show a strong band of HS and there is no difference of the HS band between subclasses of MPS III. An MPS IVA sample provides a characteristic KS band while an MPS VI sample yields a thick DS band.
Jan 01, 1997· Sulfur first produced from sour natural gas; by 1971 this source, together with crude oil, accounted for nearly one-third of world production. 1950: SF 4 first isolated by G. A. Silvery and G. H. Cady. 1951: Sulfur nmr signals (from 33 S) first detected by S. S. Dharmatti and H. E. Weaver. 1972
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Insoluble sulfur is an important rubber additive agent. It improves product quality, wearability and resistance to both fatigue and ageing. In addition to being universally recognized as the best vulcanizing agent, it is widely used in the manufacture of tire, rubber pipe, shoes, cable and wire insulating materials, latex, all kinds of automobile rubber parts and is also a necessary
Vat Dye [A Complete Overview] Textile Property
Vat Dye [A Complete Overview] Vat dye, one of the most important dye class, retains C=O chromophore in structure. This chromophore renders water insolubility. From an aqueous media, dyes are reduced and solubilized. In this state dyes show affinity for fibers. With higher strike rate, exhaustion of vat dye is excellent.
The insoluble nature of elemental sulfur in water [solubility of the α-S 8 at 20°C is only 5 μg L –1; Boulegue (1978)] and the larger size of the particles most likely slowed down the release and availability of electrons and consequently also the denitrification process.
Modelling of hydrogen sulfide fate and emissions
Odors due to the emission of hydrogen sulfide (H2S) have been a concern in the sewage treatment plants over the last decades. H2S fate and emissions from extended aeration activated sludge (EAAS
Decisions companies make have to balance many inputs—what works best to make a product, what is cost-effective, plus possible consideration of what can reduce or eliminate effects on the environment and health. Sometimes what works best is not the most benign compound to use in terms of effects on the environment.
