Sulfur phosphorus mixtures

The upper edge of the phosphorus-sulfur mixture is heated with a small flame until a reaction begins which spreads throughout the contents of the vessel. The flame is removed after the onset of the reaction which causes melting of the mass. 

Another method which has been used to prevent the sticking of isocyanate-bound composite boards to metal press surfaces is to treat the platens or cauls with a release agent. " This method has the obvious disadvantage that the metal surfaces have to be treated intermittently with the release agent. A more convenient method has been to add internal release agents to the binder composition. Several compounds have been patented for this use including derivatives of phosphorus, " sulfur, mixtures of furfural with phosphates, and vegetable waxes. ... 

The curious phase relations between phosphorus, sulfur and their binai compounds are worth noting. Because both P4 and Sg are stable molecules the phase diagram, if studied below 100°, shows only solid solutions with a simple eutectic at 10° (75 atom % P). By contrast, when the mixtures are heated above 200° the elements react and an entirely different phase diagram is obtained however, as only the most stable compounds P4S3, P4S7 and P4S10... 

In 2004, Molander et al. developed another type of chiral sulfur-containing ligands for the intermolecular Heck reaction. Thus, their corresponding novel cyclopropane-based phosphorus/sulfur palladium complexes proved to be active as catalysts for the reaction between phenyltriflate and dihydrofuran, providing at high temperature a mixture of the expected product and its iso-merised analogue (Scheme 7.7). The major isomer C was obtained with a maximum enantioseleetivity of 63% ee. 

Powdered aluminium reacts violently with phosphorus, sulfur or selenium, and a mixture of powdered metal with red phosphorus exploded when severely shocked. 

Potassium chlorate (or other metal halogenate) intimately mixed with arsenic, carbon, phosphorus, sulfur or other readily oxidised materials gives friction-, impact- and heat-sensitive mixtures which may explode violently [1], When potassium chlorate is moistened with a solution of phosphorus in carbon disulfide, it eventually explodes as the solvent evaporates and oxidation proceeds [2], Boron bums in molten chlorate with dazzling brilliance [3]. Mixtures of the chlorate and finely powdered sulfur containing over 20% of the latter will explode under a hammer-blow [4],... 

Addition of a phosphorus-sulfur bond to a carbon-carbon triple bond is catalyzed by a palladium(O) complex (Equation (130)).298 Terminal aliphatic alkynes having various functional groups undergo the addition with PhS-P(0)(OPh)2 to afford (Z)-adducts in high yield. In contrast to aliphatic alkynes, phenylacetylene gives a mixture of E Z adducts. Internal alkynes and alkenes are unreactive. 

Intimate mixtures of chlorates, bromates or iodates of barium, cadmium, calcium, magnesium, potassium, sodium or zinc, with finely divided aluminium, arsenic, copper carbon, phosphorus, sulfur hydrides of alkali- and alkaline earth-metals sulfides of antimony, arsenic, copper or tin metal cyanides, thiocyanates or impure manganese dioxide may react violently or explosively, either spontaneously (especially in presence of moisture) or on initiation by heat, friction, impact, sparks or addition of sulfuric acid [1], Mixtures of sodium or potassium chlorate with sulfur or phosphorus are rated as being exceptionally dangerous on frictional initiation. 

The elemental fuels applicable to IE production are not as obvious as the hydrocarbons described above and simply have to be learned and memorized. Those most prevalent are powdered metals (aluminum, magnesium, titanium), carbon disulfide, phosphorus, sulfur, and antimony sulfide. One important side note is that, for the most part, these elemental fuels produce IE formulations that are very sensitive and often unstable. Mixtures incorporating any of them should be treated with extra caution. 

Explodes on contact with acetic acid, acetic anhydride, ammonium nitrate, dimethylformamide, formaldehyde, concentrated hydrochloric acid, potassium chloride + sulfuric acid, sulfuric acid + water. Forms sensitive explosive mixtures with aluminum powder + ammonium nitrate + glyceryl nitrate + nitrocellulose, ammonium perchlorate, arsenic, phosphorus, sulfur, slag wool, titanium. 

Next to phosphorus, sulfur trioxide was the best smoke producer used in the w ar, notwnthstanding that it requires humid air to develop its full effect. It is prepared by passing a mixture of sulfur dioxide and oxygen... 

Mineralization of chloro-ethylenes decreases with the increase in chlorine atom substitution on the C=C bond and oxidation of nitrogen-containing compounds is slow when compared to the compounds containing phosphorus, sulfur, and chlorine. Photooxidation in a mixture of organics is complicated as the rate of one compound may be inhibited or enhanced by the presence of others (4). 

CADMIUM FUME (1306-19-0) Forms explosive mixture with aluminum, ammonium perchlorate, magnesium in the presence of heat, chlorine trifluoride. Explodes or ignites on contact with hydrazinium nitrate, hydrogen peroxide (90%), hydrogen sulfide, hydrogen trisulfide, lithium. Can increase the thermal and explosive sensitivity of nitroalkanes, hydrazinium perchlorate. May react with phosphorus, sulfur, sulfur dioxide, sulfur trioxide, selenium, zinc. 

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