In the method for the epoxidation of an olefin, the olefin is continuously reacted with hydrogen peroxide in a mixed reactor in the presence of a water soluble epoxidation catalyst, comprising a manganese complex, the reaction is carried out in a reaction mixture comprising an aqueous liquid phase and an organic liquid phase with mixing of the liquid phases, reaction mixture is continuously withdrawn from the mixed reactor and separated into a separated aqueous phase and a separated organic phase, and part of the separated aqueous phase is continuously recycled into the mixed reactor, with the combined hold-up time of aqueous phase in withdrawing, separating phases and recycling aqueous phase being kept at less than 15 minutes.

Method for the epoxidation of an olefin with hydrogen peroxide

The invention relates to a process for the manufacture of an epoxyethyl carboxylate or glycidyl carboxylate, including reacting a vinyl carboxylate or an allyl carboxylate using an oxidant and a water-soluble manganese complex in an aqueous reaction medium, and the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I): [LMnX 3 ]Y, or a binuclear species of the general formula (II): [LMn(μ-X) 3 MnL]Y n , wherein Mn is a manganese; L is a ligand and each L is independently a polydentate ligand, each X is independently a coordinating species and each μ-X is independently a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 7.0.

Manufacture of an epoxyethyl carboxylate or glycidyl carboxylate

The invention provides an method for asymmetrically catalytically epoxidizing non-functionalized alkenes. A chiral complex formed by a tetra-dentate nitrogen organic ligand and a metal manganese manganese compound formation is employed as a catalyst, and hydrogen peroxide is taken as an oxidizing agent, so that a non-functionalized alkene is subjected to asymmetric catalytic epoxidation and a corresponding chiral epoxidized compound is obtained. The yield and the enantioselectivity are both larger than 95%. The reaction is clean, mild in reaction conditions, and high in conversion rate and enantioselectivity, and has industrial prospect.

Asymmetric epoxidation method for alkenes

Methods and compositions are provided for the manufacture of an epoxide. In one embodiment, the invention provides a process for the manufacture of an epoxide including providing an olefin, hydrogen peroxide, a manganese complex, alkaline earth metal ions from an alkaline earth metal salt of an acid having a pKa of 15 or less, a buffer component, and water to form a reaction mixture and reacting the olefin with the oxidant in the reaction mixture.

Catalytic epoxidation process

PROBLEM TO BE SOLVED: To provide a method for producing epichlorohydrin (ECH) using an aqueous solvent free from environmental problems as a reaction medium, also having no generation of by-products such as diol, and commercially realizable.SOLUTION: Provided is a method for producing epichlorohydrin reacting allyl chloride and hydrogen peroxide at a molar ratio of 1:0.1 to 1:1 in the presence of a water-soluble manganese complex illustrated in the following.

Hydrogen peroxide, and method for producing epichlorohydrin using manganese complex

PROBLEM TO BE SOLVED: To provide a process for the manufacture of a 1,2-epoxide by catalytic oxidation of a terminal olefin using hydrogen peroxide and a manganese complex, which substantially does not form a byproduct such as a diol and can be commercially achieved.SOLUTION: A process for the manufacture of a 1,2-epoxide comprises catalytically oxidizing a terminal olefin with hydrogen peroxide in the presence of a catalyst, in a biphasic system comprising an organic phase and an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, and the molar ratio of the terminal olefin to hydrogen peroxide is in the range of from 1:0.1 to 1:2. The water-soluble manganese complex is a manganese complex containing a polydentate ligand of triazacyclononane or a substituted triazacyclononane.

Process for the manufacture of 1,2-epoxide

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Process for the manufacture of 1,2-epoxide