摘要:
Die Erfindung betrifft ein Verfahren zur katalytischen Erzeugung eines Alkylformiats, wobei mindestens ein alpha-Hydroxyaldehyd, mindestens eine alpha-Hydroxycarbonsäure, mindestens ein Kohlenhydrat und/oder mindestens ein Glycosid mittels einer Vanadium in der Oxidationsstufe +IV oder +V enthaltenden Vanadium-Sauerstoff-Verbindung oder eines Salzes davon als Katalysator in einer Lösung umgesetzt wird, wobei die Lösung ein Alkanol enthält, wobei das dabei als Reaktionsprodukt entstehende Alkylformiat von mindestens einem dabei entstehenden weiteren Reaktionsprodukt separiert wird, wobei der bei der katalytischen Reaktion reduzierte Katalysator durch Oxidation wieder in seinen Ausgangszustand versetzt wird.
摘要:
The invention relates to a method for oxidation of glycerol into glyceric acid which includes a step of treating glycerol with a supported metal catalyst in the presence of oxygen, said catalyst including platinum and a metal element selected from the group comprising tin, molybdenum, bismuth and a mixture thereof.
摘要:
A process for preparing a carboxylic acid, by oxidative cleavage of at least one vicinal diol, or an epoxide, wherein the reaction is carried out in the presence of a catalyst and of an oxidizing agent and in the absence of solvent.
摘要:
A method for producing polyoxyalkylene alkyl ether carboxylic acid or a salt thereof includes an oxidation reaction process of oxidizing polyoxyalkylene alkyl ether with oxygen by supplying an oxygen-containing gas to a suspension or a solution that has a depth of 200 mm or more and includes polyoxyalkylene alkyl ether. In the oxidation reaction process, a supply rate of the oxygen-containing gas is reduced in a period in which the conversion is greater than or equal to 50% and less than 70%.
摘要:
The present invention relates to a process for the oxidation of a hydroxy compound comprising the steps of:
a) providing a first mixture containing an organic protonated hydroxylamine compound, b) oxidizing said protonated hydroxylamine compound to the corresponding nitrosonium compound, c) reacting the nitrosonium compound obtained thereby with a second mixture containing a hydroxy compound, and d) oxidizing said hydroxy compound by means of the nitrosonium compound, thereby generating the hydroxylamine.
摘要:
The invention concerns a method for making carboxylic acids by oxidizing an alkyl hydroperoxide compound. More particularly, the invention concerns oxidation of a cyclohexyl peroxide into an adipic acid with an oxidizing agent containing molecular oxygen or an oxygen-containing gas in the presence of an oxidation catalyst including a metal belonging to the groups of transition metals.
摘要:
Solid-supported transition metal complex catalysts each of which is represented by the following formula (I) : wherein A represents a polystyrene-polyethylene glycol copolymer resin, Q represents a heterocycle which may be substituted by one or more lower alkyl groups, lower alkoxy groups or halogen atoms, L 1 and L 2 may be the same or different and each represents a halogen atom or an acetoxy, trifluoroacetoxy, trifluoromethanesulfonyl, tetrafluoroborate or π-allyl group, and M represents copper, palladium, nickel, cobalt, rhodium or platinum; and S-solid-supported transition metal catalysts each of which comprises a compound, which is represented by the following formula (II): wherein A and Q have the same meanings as defined above, and a transition metal selected from copper, palladium, nickel, cobalt, rhodium or platinum and supported on said compound. These catalysts are usable for a wide variety of reactions, permit conducting the reactions in water systems, exhibit sufficient catalytic functions even in oxygen atmosphere, and allow recovery and reuse.