Title:
METHOD FOR PREPARING PROPYLENE CARBONATE ON THE BASIS OF CARBON DIOXIDE RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2021/003974
Kind Code:
A1
Abstract:
The present invention relates to the field of preparation methods for propylene carbonate. Disclosed is a preparation method for propylene carbonate on the basis of a carbon dioxide raw material, comprising the following steps: under a temperature condition of 130°C to150°C and a pressure condition of 1.5 MPa to 1.8 MPa, introducing propylene oxide, carbon dioxide, a catalyst and a cocatalyst into a reaction tower, and performing a cycloaddition reaction to obtain an ester-containing gas-liquid mixture; introducing the ester-containing gas-liquid mixture into a separator, and performing a gas-liquid separation operation to obtain a mixed gas and an ester-containing mixed solution; and introducing the ester-containing mixed solution into a distillation tower, and performing a distillation operation to obtain a finished product of propylene carbonate and a circulating catalytic concentrated solution, the circulating catalytic concentrated solution comprising the catalyst and the cocatalyst. The synergistic catalysis of a catalyst and a cocatalyst in the present method can accelerate breaking speed of the C-O double bond of carbon dioxide, achieve a better catalytic effect, make a reaction more rapid and efficient, thereby improving the conversion rate of propylene oxide.
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Inventors:
ZHONG JIANJIAO (CN)
LI DAHAI (CN)
ZENG ZHIBING (CN)
LUO RONGCHANG (CN)
LI DAHAI (CN)
ZENG ZHIBING (CN)
LUO RONGCHANG (CN)
Application Number:
PCT/CN2019/122247
Publication Date:
January 14, 2021
Filing Date:
November 30, 2019
Export Citation:
Assignee:
HUIZHOU KAIMEITE GASES CO LTD (CN)
International Classes:
C07C68/04; C07C69/96; C07D317/36
Foreign References:
| CN110437200A | 2019-11-12 | |||
| CN1850755A | 2006-10-25 | |||
| CN1850755A | 2006-10-25 | |||
| CN86105205A | 1987-02-11 | |||
| CN108164497A | 2018-06-15 |
Other References:
ZHU, HONG ET AL.: "Synthesis of Propylene Carbonate in the Presence of Various Homogeneous Catalysts", NATURAL GAS CHEMICAL INDUSTRY, vol. 22, no. 1,, 31 December 1997 (1997-12-31), ISSN: 1001-9219, DOI: 20200224163139A
ZHU, H ET AL.: "Synthesis of propylene carbonate and some dialkyl carbonates in the presence of bifunctional catalyst compositions", POLYMERS FOR ADVANCED TECHNOLOGIES, vol. 7, no. 8, 31 August 1996 (1996-08-31), XP000623427, ISSN: 1099-1581, DOI: 20200224165057A
ZHU, H ET AL.: "Synthesis of propylene carbonate and some dialkyl carbonates in the presence of bifunctional catalyst compositions", POLYMERS FOR ADVANCED TECHNOLOGIES, vol. 7, no. 8, 31 August 1996 (1996-08-31), XP000623427, ISSN: 1099-1581, DOI: 20200224165057A
Attorney, Agent or Firm:
CO-HORIZON INTELLECTUAL PROPERTY INC. (CN)
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