Vinyl chlorides metal-ammonia

Thus, in ammonia synthesis, mixed oxide base catalysts allowed new progress towards operating conditions (lower pressure) approaching optimal thermodynamic conditions. Catalytic systems of the same type, with high weight productivity, achieved a decrease of up to 35 per cent in the size of the reactor for the synthesis of acrylonitrile by ammoxidation. Also worth mentioning is the vast development enjoyed as catalysis by artificial zeolites (molecular sieves). Their use as a precious metal support, or as a substitute for conventional silico-aluminaies. led to catalytic systems with much higher activity and selectivity in aromatic hydrocarbon conversion processes (xylene isomerization, toluene dismutation), in benzene alkylation, and even in the oxychlorination of ethane to vinyl chloride. 

Because enones are much more reactive towards dissolving metal reductions than nonactivated double bonds it is possible to selectively reduce the former in the presence of the latter type of double bond (Table 5, entries 1, 5 and 6). Furthermore, inverse addition of the lithium in ammonia solution to the substrate dissolved in diethyl ether allows selective reduction in the presence of other highly sensitive functional groups such as vinyl chlorides (entry 5). Under normal reaction conditions the chlorine is removed yielding the corresponding olefin49. 

METHYL STYRENE or 3-METHYL STYRENE or 4-METHYL STYRENE or m-METHYL STYRENE or p-METHYL STYRENE mixed Isomers (25013-15-4) C,H,o Flammable liquid. Forms explosive mixture with air (flash point 125°F/51°C). An inhibitor, usually 10 to 50 ppm of tert-butyl catechol, must be present in adequate concentrations to avoid explosive polymerization. Violent reaction with strong oxidizers, strong acids, peroxides and hydroperoxides. Incompatible with catalysts for vinyl or ionic polymers aluminum, aliuninum chloride, ammonia, aliphatic amines, alkanolamines, caustics, copper, halogens, iron chloride, metal salts (e.g., chlorides, iodides, sulfates, nitrates). The uninhibited monomer vapor may block vents and confined spaces by, forming a solid polymer material. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO extinguishers. a-METHYL STYRENE (98-83-9) C,H, Flammable liquid. Forms explosive mixture with air [explosion limits in air (vol %) 0.9 to 6.1 flashpoint 129°F/54°C autoignition temp 1066°F/574°C Fire Rating 2]. Easily polymerizable. Unless inhibited, forms unstable peroxides. Reacts with heat and/or lack of appropriate inhibitor concentration. Reacts with catalysts for vinyl or ionic polymerization, such as aluminum, iron chloride or 2,5-dimethyl-2,5-di(ieri-butylperoxy)hexane. Violent reaction with... 

CHEMICAL PROPERTIES combustible reacts with strong oxidizers, caustics, and liquid ammonia can also react with magnesium, aluminum powder, sodium, and potassium decomposes to vinyl chloride and hydrogen chloride above 1112°F corrodes iron and other metals at elevated temperatures when in contact with water FP (13°C, 56°F) LFL/UFL (6.2%, 15.9%) AT (413°C, 775°F) HF (-167.4 kJ/mol liquid at 25°C). 

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