Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Acetylene manganese oxides

Zinc and manganese oxides with chromium oxide Pumice — Acetylene Acetone (57)... [Pg.436]

In order to assess the function of the components of the mixture, metallic silver deposited on glass wool, unpromoted manganese ore, and silver oxide were tested separately. Silver was found to be wholly inactive at 140°C., marked activity being reached only at 250°C. at 300 C. it effected complete removal of acetylene. Manganese ore likewise showed weak activity under the experimental conditions. Silver oxide was found to react stoichiometrically, silver acetylide being formed... [Pg.116]

Nickel peroxide is a solid, insoluble oxidant prepared by reaction of nickel (II) salts with hypochlorite or ozone in aqueous alkaline solution. This reagent when used in nonpolar medium is similar to, but more reactive than, activated manganese dioxide in selectively oxidizing allylic or acetylenic alcohols. It also reacts rapidly with amines, phenols, hydrazones and sulfides so that selective oxidation of allylic alcohols in the presence of these functionalities may not be possible. In basic media the oxidizing power of nickel peroxide is increased and saturated primary alcohols can be oxidized directly to carboxylic acids. In the presence of ammonia at —20°, primary allylic alcohols give amides while at elevated temperatures nitriles are formed. At elevated temperatures efficient cleavage of a-glycols, a-ketols... [Pg.248]

Ionization interference is particularly a problem in the high temperature nitrous oxide-acetylene flame, where even elements such as manganese can be appreciably... [Pg.85]

Small amounts of acetaldehyde (from acetylene) are converted industrially into alcohol by catalytic hydrogenation, and large amounts are transformed into acetic acid by catalysed autoxidation (with oxides of manganese). [Pg.220]

Magnesium nitrate, Tin(ll) fluoride, 4693 Manganese(lV) oxide, Calcium hydride, 4705 Molybdenum(VI) oxide, Graphite, 4717 Nitric acid, Formaldehyde, 4436 Nitric acid, Formic acid, 4436 Nitric acid, Formic acid. Urea, 4436 Nitric acid, Metal thiocyanate, 4436 Oxalic acid, Urea, 0725 Ozone, Acetylene, 4846... [Pg.351]

See other pages where Acetylene manganese oxides is mentioned: [Pg.57]    [Pg.92]    [Pg.36]    [Pg.36]    [Pg.279]    [Pg.36]    [Pg.799]    [Pg.199]    [Pg.203]    [Pg.584]    [Pg.245]    [Pg.247]    [Pg.249]    [Pg.250]    [Pg.253]    [Pg.281]    [Pg.282]    [Pg.626]    [Pg.626]    [Pg.653]    [Pg.703]    [Pg.712]    [Pg.713]    [Pg.945]    [Pg.994]    [Pg.994]    [Pg.73]    [Pg.273]    [Pg.686]    [Pg.210]    [Pg.131]    [Pg.144]    [Pg.242]    [Pg.201]    [Pg.235]    [Pg.449]    [Pg.203]    [Pg.449]    [Pg.72]    [Pg.249]    [Pg.190]   
See also in sourсe #XX -- [ Pg.120 ]



SEARCH



Acetylene oxidation

Manganese oxidation

Manganese-oxidizing

Oxidants manganese

© 2024 chempedia.info