Method for preparing organic carbonates
AssigneeChina Petrochemical Development Corporation
InventorsMin-Sheng Chen, Chia-Jung Tsai, Chih-Wei Chang
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Abstract
A method for preparing organic carbonates comprising subjecting an alcohol compound to oxidative carbonylation in the presence of carbon monoxide, oxygen and a liquid-phase catalytic system, to form a organic carbonates, wherein the liquid-phase catalytic system includes at least one catalyst, at least one additive and at least one ionic liquid composed of a cation, which has a nitrogen-containing heterocyclic structure, and an anion. Through using the additive and the ionic liquid, the activity and the performance of the catalyst are enhanced, and increased reaction rate and yield can be obtained.
Claims12
A method for preparing organic carbonates comprising subjecting an alcohol compound to oxidative carbonylation in the presence of carbon monoxide, oxygen and a liquid-phase catalytic system, to form a organic carbonates of the formula CO(RO)2, wherein R representing an alkyl having 1 to 6 carbon atoms, and wherein the liquid-phase catalytic system includes at least one catalyst, at least one additive, and at least one ionic liquid composed of a cation and an anion, and wherein the catalyst is a copper catalyst, the additive is selected from the group consisting of an imidazole compound, a benzimidazole compound, a pyridine compound, a bipyridyl compound, a pyridazine compound, a pyrimidine compound, a pyrazine compound and a mixture thereof, and the cation of the ionic liquid has a structure of formula (I) or (II):
- wherein R1 and R3 are, independently, C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkanoyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl or C7-20 alkylaryl, each of these groups may be further substituted by halogen, nitro and/or cyano, and
- R2, R4 and R5 are, independently, hydrogen, halogen, nitro, cyano, amino, C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkanoyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl or C7-20 alkylaryl, wherein C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkanoyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl or C7-20 alkylaryl may be further substituted by halogen, nitro and/or cyano;
- and
- wherein R6 represents C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkanoyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl or C7-20 alkylaryl, each of these groups may be further substituted by halogen, nitro and/or cyano, and
- R7, R8, R9, R10 and R11 are, independently, hydrogen, halogen, nitro, cyano, amino, C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkylacyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl or C7-20 alkylaryl, wherein C1-12 alkyl, C1-12 alkylamino, C1-12 alkoxy, C1-12 alkylacyl, C3-20 cycloalkyl, C3-20 cycloalkyloxy, C3-20 cycloalkylacyl, C6-20 aryl, C7-20 arylalkyl and C7-20 alkylaryl may be further substituted by halogen, nitro and/or cyano.
Dependencies are inferred from the claim text.