摘要:
Organic compounds containing at least one site of ethylenic unsaturation are catalytically hydrocyanated and the medium of hydrocyanation is separated into desired linear organic compounds containing at least one nitrile function, e.g., 3-pentenenitrile, and undesired nitrile by-products, e.g., methylglutaronitrile, and the undesired nitrile by-products are hydrodenitrogenated into ammonia and at least one hydrocarbon compound under an absolute hydrogen pressure ranging from 0.1 to 10 MPa at a temperature ranging from 200° to 500° C. and in the presence of a hydrodenitrogenation catalyst.
摘要:
Process for the purification of diamines The present invention relates to a process for the purification of diamines obtained by hydrogenation of dinitriles. It relates more particularly to the purification of hexamethylenediamine obtained from the hydrogenation of adiponitrile. The process of the invention consists in treating a portion of the hexamethylenediamine stream withdrawn from the distillation column and in reinjecting this treated stream into the said column.
摘要:
The present invention concerns a process for hydrocyanating ethylenically unsaturated organic compounds to compounds containing at least one nitrile function. It relates more particularly to the hydrocyanation of diolefins such as butadiene or of substituted olefins such as alkenenitriles, for instance pentenenitriles. According to the process of the invention the reaction is implemented in the presence of a metal complex catalyst comprising a transition metal such as nickel and an organic ligand.
摘要:
A method for hydrogenating aromatic nitro compounds by reacting at least one aromatic nitro compound with hydrogen in two adiabatically operated fixed-bed catalytic reactors arranged in series, wherein one part of the reaction mixture from the first reactor is recirculated therein while the other part is fed into the second reactor.
摘要:
Halonitroaromatic compounds, e.g., 3-chloro-4-fluoronitrobenzene, are selectively hydrogenated into the corresponding haloaromatic amines, in the essential absence of hydrodehalogenation, by reacting same with hydrogen in the presence of a catalytically effective amount of a novel Raney-type catalyst composition consisting essentially of an alloy of nickel, aluminum and molybdenum, Ni/Al/Mo, the Al/Mo ratio by weight thereof being equal to or greater than 1.
摘要翻译:通过在催化有效量的新型阮内型催化剂组合物的存在下,使氢卤素化合物,例如3-氯-4-氟硝基苯,在基本不存在加氢脱卤的情况下,通过与氢反应,选择性氢化成相应的卤代芳族胺 基本上由镍,铝和钼的合金,Ni / Al / Mo组成,Al / Mo的重量比等于或大于1。