摘要:
Disclosed herein is a process for the production of acetic acid by the controlled oxidation of ethanol. The process according to the invention comprises the reaction of ethanol with a source of oxygen. The reaction is performed in the presence of a catalyst in which the active stage is vanadium, titanium, and oxygen.
摘要:
Optionally substituted p-aminophenol compounds, easily converted into the N-acylated derivatives thereof, are prepared by hydrogenating the corresponding nitrobenzene, in solution in a saturated aliphatic monocarboxylic acid, notably acetic acid, in the presence of an effective amount of a protonic acid.
摘要:
Phenols/phenol ethers are hydroxylated by reaction with hydrogen peroxide in the presence of a catalytically effective amount of a calcined germanozeosilite MFI zeolite.
摘要:
The phenols and phenol ethers, e.g., phenol itself, are effectively hydroxylated by reacting hydrogen peroxide therewith, in the presence of a catalytically effective amount of titanium dioxide.
摘要:
The invention relates to chemical compounds and their use as catalysts in the solvolysis of alkyl halides. The chemical compounds, when dry, have formula (I):(EO.sub.4 M).multidot.(Imp)p (I)wherein E is selected from the group consisting of phosphorus, arsenic, antimony and bismuth, and is preferably phosphorus, and M is a metal or a mixture of metals.Imp corresponds to a basic impregnating compound consisting of alkaline earth metal, or preferably alkali metal, and their mixtures in combination with a counter-anion to ensure electrical neutrality.The coefficient p is between 10.sup.-2 and 1/3.
摘要:
Phenol/substituted phenols are prepared by directly hydroxylating an aromatic substrate with nitrous oxide, in vapor phase, in the presence of a modified (acidified) ZSM-5 or ZSM-11 zeolite, containing such elements as Ga, Fe, B, In, Cr, Sc, Co, Ni, Be, Zn, Cu, Sb, As or V.
摘要:
The use of silica for controlling the thermal degradation of bicarbonate of an alkaline, alkaline-earth metal or bicarbonate of ammonia with an average particle size less than or equal to 100 &mgr;m is disclosed. The resulting bicarbonate and silica mixtures may be used in cosmetics and detergents, and more particularly in formulae for toothpaste.
摘要:
Process for the treatment of a material comprising a polymer, especially a polyamide. The process consists in subjecting the polyamide to hydrolysis in the presence of a hydrolyzing nitrous grouping and transforming the hydrolyzed compounds into diacids. The treatment of a polyamide 6.6 results in the recovery of adipic acid and other diacids corresponding to the participating acid monomer and to the transformation of at least one part of the diamine monomer into diacids.
摘要:
The present invention relates to a process for the preparation of carboxylic acids by controlled oxidation of the corresponding alkanes. The process according to the invention consists in reacting the alkane with a source of oxygen, the reaction being performed in the presence of a catalyst in which the active phase is based on vanadium, titanium, molybdenum, phosphorus and oxygen.