摘要:
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an aqueous liquid phase and an organic liquid phase with mixing of the liquid phases, reaction mixture is continuously withdrawn from the mixed reactor and separated into a separated aqueous phase and a separated organic phase, and part of the separated aqueous phase is continuously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.
摘要:
The present invention relates to an epoxidation process for the preparation of alkylene oxide comprising contacting a hydroperoxide with an olefin in the presence of a catalyst, wherein the catalyst is a titanium containing catalyst obtainable by a method comprising the steps of (a) making a support by a method comprising reacting a silicate with water in the presence of a surfactant selected from block copolymers based on ethylene oxide (EO) and propylene oxide (PO), and calcining the obtained reaction product; and (b) impregnating the support of step (a) with a titanium containing agent.
摘要:
Conjugationally extended hydrazine compositions of the formula (RR2)N(H)n(NH2)n, fluorescent hydrazone compositions of the formula (RR2)NN═C(R1R2), methods of the formation of hydrazones from the reaction of conjugationally extended hydrazines with conjugationally extended carbonyls and methods of their use in assays systems are described. Use of these conjugationally extended hydrazine and oxime compositions for direct calorimetric and fluorometric assays wherein a chromophore or the fluorophore is incorporated into the linker that is positioned between a reactive linking moiety and a biotin molecule. More specifically the linker comprises one molecule of a high affinity binding pair such as for example biotin of the biotin/avidin high affinity binding pair, connected to a spacer molecule such as for example a length of polyethyleneglycol followed by a pro-chromophoric, chromophoric, pro-fluorescent or fluorescent moiety connected to an amino-, thiol- or carbohydrate-reactive moiety such as for example succinimidyl, maleimido or aminoxy group respectively, that may covalently link to a biomolecule.
摘要:
A catalyst for partial oxidation of olefin, which comprises silver or silver oxide and an alkali metal or a compound thereof supported on an α-alumina carrier containing silicon or a compound thereof, wherein the silicon or the compound thereof exists at a position substantially identical to that of a particle of the alkali metal or the compound thereof, a preparation method thereof, and a process for preparing olefin oxide which comprises subjecting olefin to vapor-phase oxidation with a molecular oxygen-containing gas in the presence of the catalyst.
摘要:
Novel compounds that are anti-angiogenic or immunosuppressive are described. Also described are methods for determining if an animal is at risk for a disease involving abnormal angiogenesis or an immune reaction resulting in pathology comprising evaluating an aspect of MetAP2 metabolism or structure; methods for identifying agents that are anti-angiogenic or immunosuppressive comprising evaluating the effect of the agent on an aspect of MetAP2 metabolism; methods for treating a cell having an abnormality in metabolism or structure of MetAP2; and methods for treating abnormal angiogenesis or an immune reaction which results in pathology in an animal. Pharmaceutical compositions are also provided.
摘要:
Novel compounds that are anti-angiogenic or immunosuppressive are described. Also described are methods for determining if an animal is at risk for a disease involving abnormal angiogenesis or an immune reaction resulting in pathology comprising evaluating an aspect of MetAP2 metabolism or structure; methods for identifying agents that are anti-angiogenic or immunosuppressive comprising evaluating the effect of the agent on an aspect of MetAP2 metabolism; methods for treating a cell having an abnormality in metabolism or structure of MetAP2; and methods for treating abnormal angiogenesis or an immune reaction which results in pathology in an animal. Pharmaceutical compositions are also provided.
摘要:
New 1-hydroxyethyl-azole derivatives of the general formula ##STR1## in which R represents an alkyl radical, an optionally substituted cycloalkyl radical or an optionally substituted phenyl radical,X represents a nitrogen atom or a CH group,Y represents a grouping --OCH.sub.2 --, --CH.sub.2 CH.sub.2 --or --CH.dbd.CH--,Z represents a halogen atom, an alkyl, cycloalkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy or halogenoalkylthio radical, an optionally substituted phenyl radical, an optionally substituted phenoxy radical, an optionally substituted phenylalkyl radical or an optionally substituted phenylalkoxy radical andm is 0, 1, 2 or 3, a process for their preparation and their use as plant growth regulators and fungicides.
摘要:
New 1-hydroxyethyl-azole derivatives of the general formula ##STR1## in which R represents an alkyl radical, an optionally substituted cycloalkyl radical or an optionally substituted phenyl radical,X represents a nitrogen atom or a CH group,Y represents a grouping --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or --CH.dbd.CH--,Z represents a halogen atom, an alkyl, cycloalkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy or halogenoalkylthio radical, an optionally substituted phenyl radical, an optionally substituted phenoxy radical, an optionally substituted phenylalkyl radical or an optionally substituted phenylalkoxy radical andm is 0, 1, 2 or 3,a process for their preparation and their use as plant growth regulators and fungicides.
摘要:
Oxirane compounds of the formula ##STR1## in which R represents tert-butyl, iso-propyl radical, cyclopropyl, substituted cyclopropyl, cyclopentyl or substituted cyclopentyl, cyclohexyl or substituted cyclohexyl, in each case the substituent being selected from methyl, or phenyl which is optionally mono or di-substituted by identical or different substituents selected from fluorine, chlorine, methyl and trifluoromethyl,Y represents a grouping --OCH.sub.2 --, each Z is individually selected from the group consisting of a fluorine, chlorine or bromine atom, methyl, tert-butyl, cyclohexyl, methoxy, methylthio, trifluoromethyl, trifluoromethoxy, trifluoromethylthio, phenyl, phenoxy, benzyl and benzyloxy, said phenyl, phenoxy, benzyl and benzyloxy being optionally mono or di-substituted by identical or different substituents selected from fluorine, chlorine and methyl,m is 0, 1, 2 or 3; these compounds are particularly useful as intermediates for compounds used in agricultural compositions as plant growth regulants.
摘要:
The present invention relates to a non-thermosetting composition made by reacting epichlorohydrin and a primary amine, to the use of that composition for making thermosetting (curable) adhesives suitable for bonding composites, to a method of preparing composites using the thermosetting (curable) adhesives, and to the related composites bonded with the thermosetting (curable) adhesives.