摘要:
Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.
摘要:
Provided is a method for oligomerization of ethylene, and more particularly, a method for producing 1-hexene and 1-octene at a high selectivity under an ethylene atmosphere by inducing a remarkably improved catalytic activity while effectively reducing a production amount of polyethylene by introducing the oligomerization catalyst and a cocatalyst mixture containing at least two aluminums together and adjusting the kind of oligomerization catalyst and injection conditions thereof.
摘要:
Provided are a double metal cyanide (DMC) catalyst used in copolymerization of an epoxide/carbon dioxide useful for preparing polyurethane, a foaming agent, an elastomer, a sealant, a coating material, and the like, and an epoxide/carbon dioxide copolymer prepared using the same. In addition, the present invention provides a double metal cyanide (DMC) catalyst prepared us ing an ion-exchange resin without washing alcohol, and an epoxide/carbon dioxide copolymer having a high purity, a high selectivity, and a high carbonate content prepared using the same.
摘要:
Provided are a mobility control fluid composition for enhancing oil recovery from an oilfield used for enhancing oil recovery from the oilfield and an enhanced oil recovery method using the same, and more specifically, a mobility control fluid composition including an amine oxide compound and an enhanced oil recovery method from an oilfield using the same. By using the mobility control fluid composition including the amine oxide compound for enhancing oil recovery from the oilfield according to the present invention, foam formation and mobility of the fluid may be effectively controlled.
摘要:
Provided is a method for oligomerization of ethylene, and more particularly, a method for producing 1-hexene and 1-octene at a high selectivity under an ethylene atmosphere by inducing a remarkably improved catalytic activity while effectively reducing a production amount of polyethylene by introducing the oligomerization catalyst and a cocatalyst mixture containing at least two aluminums together and adjusting the kind of oligomerization catalyst and injection conditions thereof.
摘要:
Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.
摘要:
The present invention is directed to a novel complex synthesized from a Salen-type ligand. The novel complex contains a quaternary ammonium salt. The present invention is also directed to a preparation method of a copolymer of carbon dioxide and epoxide using the complex synthesized from a Salen-type ligand as a catalyst.
摘要:
Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.
摘要:
Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.
摘要:
Provided are a double metal cyanide (DMC) catalyst used in copolymerization of an epoxide/carbon dioxide useful for preparing polyurethane, a foaming agent, an elastomer, sealant, a coating material, and the like, and an epoxide/carbon dioxide copolymer prepared using the same.In addition, the present invention provides a double metal cyanide (DMC) catalyst prepared using an ion-exchange resin without washing alcohol, and an epoxide/carbon dioxide copolymer having a high purity, a high selectivity, and a high carbonate content prepared using the same.