Method for producing cyclic carbonate
AssigneesNational Institute of Advanced Industrial Science and Technology, Maruzen Petrochemical Co., Ltd.
InventorsToshikazu Takahashi, Hiroyuki Yasuda, Shouji Yamamoto, Takashi Naniki, Yasunori Hayashi, Takeshi Haruna, Takuro Furukawa
Life of this patent
Estimating the term…
Abstract
Provided is a method for producing a cyclic carbonate obtained by reacting epoxide and carbon dioxide in the presence of a quaternary onium salt as a counter ion or a quaternary phosphonium salt having a halogenated anion as a counter ion, or in the presence of a solid catalyst obtained by immobilizing the quaternary onium salt onto a carrier, wherein an organohalogen compound containing at least one halogen atom in one molecule is added to the reaction system.
Claims15
A method for producing a cyclic carbonate comprising:
- (i) reacting epoxide and carbon dioxide in the presence of a quaternary onium salt selected from the group consisting of a quaternary ammonium salt having a halogenated anion as a counter ion and a quaternary phosphonium salt having a halogenated anion as a counter ion, or
- (ii) reacting epoxide and carbon dioxide in the presence of a solid catalyst obtained by immobilizing the quaternary onium salt onto a carrier;
- and
- adding an organohalogen compound to (i) or (ii);
- wherein the organohalogen compound is represented by the following formula (2):
- RZ (2),
- wherein R represents linear or branched chain alkyl having 1 to 6 of carbon atom, aralkyl having 7 to 20 of carbon atom, alkoxyalkyl having 2 to 12 of carbon atom, alkanoylalkyl having 3 to 12 of carbon atom, formylalkyl having 2 to 6 of carbon atom, or hydroxyalkyl having 1 to 6 of carbon atom, and Z represents a halogen atom,
- wherein the organohalogen compound of formula (2) is a different compound compared to the epoxide.
A method for continuously producing a cyclic carbonate comprising:
- filling a catalyst in a fixed bed tubular reactor and continuously supplying carbon dioxide and epoxide to the fixed bed tubular reactor to be brought into contact with the catalyst and, at the same time, continuously extracting the reaction solution contained in the fixed bed tubular reactor, wherein the catalyst comprises a solid catalyst obtained by immobilizing a quaternary onium salt selected from the group consisting of a quaternary ammonium salt having a halogenated anion as a counter ion and a quaternary phosphonium salt having a halogenated anion as a counter ion onto a carrier, and
- supplying to the fixed bed tubular reactor an organohalogen compound-represented by the following formula (2):
- RZ (2),
- wherein R represents linear or branched chain alkyl having 1 to 6 of carbon atom, aralkyl having 7 to 20 of carbon atom, alkoxyalkyl having 2 to 12 of carbon atom, alkanoylalkyl having 3 to 12 of carbon atom, formylalkyl having 2 to 6 of carbon atom or hydroxyalkyl having 1 to 6 of carbon atom, and Z represents a halogen atom.
A method for producing a cyclic carbonate comprising:
- (i) reacting epoxide and carbon dioxide in the presence of a quaternary onium salt selected from the group consisting of a quaternary ammonium salt having a halogenated anion as a counter ion and a quaternary phosphonium salt having a halogenated anion as a counter ion, or
- (ii) reacting epoxide and carbon dioxide in the presence of a solid catalyst obtained by immobilizing the quaternary onium salt onto a carrier;
- and
- adding an organohalogen compound to (i) or (ii), wherein the organomonohalogen compound is a monohalogenated alcohol selected from the group consisting of chloromethanol, chloroethanol, chloropropanol, chlorobutanol, chloropentanol, bromomethanol, bromopropanol, bromobutanol, bromoethanol, bromopentanol, iodomethanol, iodoethanol, and iodopropanol.
Dependencies are inferred from the claim text.