摘要:
An efficient dehalogenation can be carried out by a method which comprises treating an organic compound containing a compound of halogen, such as fluorine or chlorine, as an impurity and having non-conjugated carbon-carbon double bonds, for example, butene polymer produced with a boron trifluoride catalyst, with an inorganic solid treating agent containing aluminum atoms. When the dehalogenation is conducted in the presence of a basic substance such as ammonia or an amine, it can be continued over long while inhibiting the isomerization of the non-conjugated carbon-carbon double bonds.
摘要:
A process for producing a butene polymer which comprises a step (I) of adding a complex catalyst comprising boron trifluoride, an ether, and an alcohol and/or water to a C4 fraction in a speci fic proportion to conduct liquid phase polymerization and a step (II) of diminishing the mono- to trimers in the resultant polymer to 0.2 wt.% or lower by distillation. Thus, a butene polymer can be obtained in high yield in which 80 mol. % or more of the polymer molecules each has a terminal vinylidene structure and which is reduced in residual organofluorine content.
摘要:
A direct and/or alternating voltage is applied to a nonconductive fluid containing a boron trifluoride complex at least partly dispersed and/or dissolved therein to thereby precipitate the boron trifluoride complex, and the precipitate is separated from the nonconductive fluid. Thus, the complex can be recovered without changing the molar coordination ratio in the complex. By utilizing this method for olefin oligomer production in which a boron trifluoride complex catalyst is used, the recovered catalyst can be reused as it is for the reaction.
摘要:
Butene oligomer derivatives having tert-butyl groups as one of the terminal groups, having a repeating unit of the main hydrocarbon chain consisting of 80% by mole or more of -CH2C(CH3)2-, and carrying the other terminal group consisting of 60% by mole or more of 1,4-butanediol type functional groups. These derivatives are useful as macromonomers which can be subjected to polycondensation, polyaddition, etc.
摘要:
A method which comprises contacting a fluid containing boron trifluoride or a complex thereof with a metal fluoride to selectively adsorb and remove the boron trifluoride contained in the complex and heating the resultant metal tetrafluoroborate at a temperature in the range of 100 to 600 DEG C to separate it into boron trifluoride and the metal fluoride. Thus, boron trifluoride can be economically recovered in a reusable state without causing environmental pollution. By applying the method to a process for producing polybutylene, an olefin oligomer, etc. where a boron trifluoride complex catalyst is used, the catalyst retaining its activity can be recovered and effectively utilized.