摘要:
Phenol or a substituted phenol is oxidized to the corresponding benzoquinone or substituted benzoquinone in the presence of a copper halide or copper nitrate catalyst promoted with an oxide or hydroxide of a Group II metal.
摘要:
Phenol or a substituted phenol is oxidized to the corresponding benzoquinone or substituted benzoquinone in a nitroalkane solvent in the presence of a copper ion catalyst promoted with a base selected from alkali metal phenoxides, and secondary or tertiary lower alkyl amines.
摘要:
The rate of selective hydrogenation of carboxylic acid anhydrides to esters or lactones in the presence of a ruthenium organophosphorous catalyst which contains or liberates a hydrogen halide during the hydrogenation, is improved by providing in the reaction medium prior to or during the hydrogenation a basic amino compound to remove the hydrogen halide.
摘要:
In the process of oxidizing phenol to p-benzoquinone with a bivalent copper ion catalyst, the improvement of promoting the catalyst with a base to obtain improved conversion and/or selectivity. The preferred bases used are alkali metal hydroxides and phenates and secondary and tertiary lower alkyl amines.
摘要:
The oxidation of methyl benzenes, such as toluene, with air or oxygen in the presence of acetic anhydride and sulfuric acid catalyst to form a phenolic acetate and methylene diacetate may be carried out under mild conditions when small amounts of benzaldehyde are added to the reaction.The resulting acetates may then be pyrolyzed to yield phenolic compounds and formaldehyde, respectively.
摘要:
Norbornadiene and an alkyne are catalytically codimerized in the presence of a homogeneous catalytic system of cobaltic or cobaltous acetylacetonate, 1,2-bisdiphenylphosphino ethane and an alkyl alluminum chloride. Also, novel codimers of norbornadiene and an alkyne containing at least three carbons are disclosed. After hydrogenation, resulting codimers can be used as high energy fuels or diluents for such fuels.
摘要:
Acylic or cyclic epoxyalcohols can be prepared by direct oxidation of an olefin when there is employed a ion-exchanged bimetallic catalyst, wherein one metal is from Groups IB or VIII, and the other from Group V or VI.
摘要:
Alkyl halide exchange may be catalyzed under mild conditions in homogeneous solution by ligand stabilized, low valent, coordinatively unsaturated d.sup.6 or d.sup.8 Group VIII metal complexes of the formulaM.sup.n X.sub.n L.sub.xwherein M is a metal of Group VIII of the Periodic Table; X is chloride, bromide or iodide; n is 1 or 2; L is a neutral ligand such as CO; trialkyl or triaryl- phosphines, arsines, amines, or stibines and the like; x is an integer from 2-4 and L.sub.x represents x neutral ligands which may be the same or different.In this manner the halide group of one alkyl halide may be replaced by the halogen of another alkyl halide by a process of alkyl halide exchange.
摘要:
Formamides of formula R--NHCHO where R is a lower alkyl, cycloalkyl, aryl or aralkyl can be converted to isocyanates of the formula R--N=C=O when contacted with certain ruthenium, palladium, or platinum dehydrogenation catalysts.
摘要翻译:当与某些钌,钯或铂脱氢催化剂接触时,其中R为低级烷基,环烷基,芳基或芳烷基的式R-NHCHO的甲酰胺可转化为式R-N = C = O的异氰酸酯。