摘要:
A method for preparing a partially fluorinated alcohol, comprises reacting an epoxide: wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group comprising H, F, Cl, Br, I, CF 3 , alkyl, fluoroalkyl, haloalkyl with a fluorinating agent.
摘要:
The present invention relates to a process for the continuous production, through the glycerine route, of epichlorohydrin from dichlorohydrins, in presence of an alkali solution, wherein the reactive column for the reaction of dichlorohydrin to epichlorohydrin is characterized by single or multiple feed injections and by multiple alkali solution injections, in order to optimize the epichlorohydrin production and to minimize the aqueous effluents in quantity and in organic contaminants.
摘要:
Disclosed are a method for preparing chlorohydrins composition and a method for preparing epichlorohydrin using chlorohydrins composition prepared thereby. The disclosed method for preparing chlorohydrins composition reacts polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst, comprises at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in the respective order, and includes an additional step for mixing chlorohydrins concentration, which was obtained by refining a reaction mixture discharged from the final reaction step of the plurality of reaction steps, with a water-rich layer, which was discharged from the water removal step. The disclosed method for preparing epichlorohydrin includes a step for contacting the chlorohydrins composition, which was prepared using the method for preparing chlorohydrins composition, with an alkaline chemical.
摘要:
Disclosed are a method for preparing chlorohydrins and a method for preparing epichlorohydrin using chlorohydrins prepared thereby. The disclosed method for preparing chlorohydrins reacts polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst, comprises at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in the respective order, and after mixing at least a portion of a reaction mixture discharged from at least one of the reaction steps from the plurality of reaction steps with an additional chlorinated agent, recirculates the reaction mixture to the reaction step from which the mixture was discharged. The disclosed method for preparing epichlorohydrin includes a step for reacting the chlorohydrins, which was prepared using the method for preparing chlorohydrins, with an alkaline chemical.
摘要:
Disclosed are a method for preparing chlorohydrins and a method for preparing epichlorohydrin using chlorohydrins prepared thereby. The disclosed method for preparing chlorohydrins reacts polyhydroxy aliphatic hydrocarbon with a chlorination agent in the presence of a catalyst, comprises at least one combination of a series of unit operations including a first reaction step, a water removal step, and a second reaction step, in the respective order, and additionally includes a step for refining cholorihydrins from a reaction mixture discharged from the final reaction step of the plurality of reaction steps. The disclosed method for preparing epichlorohydrin includes a step for reacting the chlorohydrins, which was prepared using the method for preparing chlorohydrins, with an alkaline chemical.
摘要:
A process for stereoselective synthesis of a compound of Formula (X) or Formula (X') : wherein: R1 is an aryl group substituted with one to three substituent groups, wherein each substituent group of R1 is independently C1-C5 alkyl, C2-C5 alkenyl, C2- C5 alkynyl, C1-C5 alkoxy, C1-C5 alkoxycarbonyl, aminocarbonyl, alkylaminocarbonyl, dialkylaminocarbonyl, C1-C5 alkoxycarbonylamino, aminosulfonyl, C1-C5 alkylaminosulfonyl, C1-C5 dialkylaminosulfonyl, halogen, hydroxy, carboxy, cyano, trifluoromethyl, trifluoromethoxy, nitro, or C1-C5 alkylthio wherein the sulfur atom is oxidized to sulfoxide or sulfone, and R2 and R3 are each independently hydrogen or C1-C5 alkyl.