Catalyst system for producing cyclic carbonates and method related thereto
AssigneePtt Exploration and Production Public Company Limited
InventorsTaradon Piromchart, Valerio D'Elia
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Abstract
The present invention provides a catalyst system for producing cyclic carbonates from carbon dioxide (CO2) and epoxide-based compounds comprising: a pre-catalyst; and a co-catalyst wherein said pre catalyst is BiCl3 and said co-catalyst is selected from tetra-n-butylammonium bromide (TBAB), tetra-n-butylammonium iodide (TBAI), tetra-n-butylphosphonium bromide (PBu4Br), tetra-n-butylphosphonium iodide (PBu4I) or mixtures thereof.
Claims16
A method for producing cyclic carbonates which comprises reacting epoxide-based compounds with carbon dioxide (CO2) in the presence of a catalyst system comprising:
- a pre-catalyst;
- and
- a co-catalyst
- wherein said pre catalyst is BiCl3 and said co-catalyst is selected from tetra-n-butylammonium bromide (TBAB), tetra-n-butylammonium iodide (TBAI), tetra-n-butylphosphonium bromide (PBu4Br), tetra-n-butylphosphonium iodide (Pbu4I) or mixtures thereof;
- and
- wherein said method is performed using a mole ratio of the pre-catalyst:the co-catalyst:the epoxide-based compound in the range of 1:1:10 to 1:3:50;
- at a pressure of carbon dioxide in the range of 1 to 100 bar;
- a temperature in the range of 10 to 200° C.;
- and a reaction time in the range of 1 to 8 hours.
A method for producing cyclic carbonates which comprises reacting epoxide-based compounds with carbon dioxide (CO2) in the presence of a catalyst system comprising:
- a pre-catalyst;
- and
- a co-catalyst
- wherein said pre catalyst is BiCl3 and said co-catalyst is selected from tetra-n-butylammonium bromide (TBAB), tetra-n-butylammonium iodide (TBAI), tetra-n-butylphosphonium bromide (Pbu4Br), tetra-n-butylphosphonium iodide (Pbu4I) or mixtures thereof;
- and
- wherein said method is performed using a mole ratio of the pre-catalyst:the co-catalyst:the epoxide-based compound of 1:2:50;
- at a pressure of carbon dioxide in the range of 1 to 100 bar;
- a temperature in the range of 10 to 200° C.;
- and a reaction time in the range of 1 to 8 hours.
Dependencies are inferred from the claim text.