摘要:
The instant invention relates to a process for the preparation of fluoroanilines of formula (I) wherein a fluorinated nitrated benzene compound of formula (II) is subjected to a catalytic hydrogenation in a liquid medium containing a catalyst, under hydrogen pressure, carrying out a catalytic reduction reaction and, optionally, a hydrogenolysis reaction, wherein the compound of formula (II) is introduced gradually into the said medium so that the content of compound of formula (II) in the liquid remains less than or equal to 1000 ppm by mass, in order selectively to form the compound of formula (I).
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。
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。
摘要:
The production of compounds comprising nitrile functions and of cyclic imide compounds is described. Further described, is the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, optionally of natural and renewable origin, and from a mixture N of dinitriles comprising 2-methylglutaronitrile (MGN), 2-ethylsuccinonitrile (ESN) and adiponitrile (AdN).
摘要:
The present invention relates to the production of compounds comprising nitrile functions and of cyclic imide compounds. It relates more particularly to the production of compounds comprising nitrile functions from compounds comprising carboxylic functions, advantageously of natural and renewable origin, and from 2-methylglutaronitrile (MGN) or a mixture N of dinitriles comprising 2-methylglutaronitrile (MGN), 2-ethylsuccinonitrile (ESN) and adiponitrile (AdN).
摘要:
The invention relates to a catalytic method for the industrial production of a diol compound, such as 2-methyl-2-4-pentanediol, also called 2,4-hexylene glycol (HGL), from a β-hydroxy carbonyl compound, Formula (I), in particular diacetone alcohol (DAA).
摘要:
A method for preparing a lactone is described. Also described, is the preparation of butyrolactone, valerolactone and caprolactone. The method for preparing a lactone can include a reduction of a dicarboxylic acid using hydrogen, in a gaseous phase and in the presence of an effective amount of a catalyst including an active ruthenium-tin phase including at least one Ru2Sn3 alloy and an Ru3Sn7 alloy.
摘要翻译:描述了制备内酯的方法。 还描述了丁内酯,戊内酯和己内酯的制备。 制备内酯的方法可以包括在气相中和在有效量的包含至少一种Ru 2 Sn 3合金和Ru 3 Sn 7合金的活性钌 - 锡相的催化剂的存在下还原二羧酸。
摘要:
A process for the preparation of compounds containing nitrile functions and, more specifically, compounds containing two nitrile functions, such as succinonitrile and adiponitrile, is described. A process for preparing dintrile compounds obtained by reacting ammonia with an aqueous solution of a dicarboxyl compound in the presence of a silicon orthophosphate catalyst is also described.
摘要:
Alcohols are prepared from aldehydes employing a bifunctional catalyst; the aldehydes are first condensed and the products of condensation thereof are then converted into alcohols by hydrogenation.
摘要:
Novel dicarboxylic acid diesters and admixture thereof have the formula (I): R1—OOC-A-COOR2 (I) and are advantageously prepared from fusel oils; these are particularly suited for formulation into useful solvent, cosolvent, stripping, crystallization inhibiting, cleaning and degreasing compositions.