Polycarbonate-manufacturing catalyst, and polycarbonate manufacturing method
A technology of polycarbonate and catalyst, which is applied in the field of catalyst for polycarbonate production and polycarbonate production, and can solve the problems that metal components are easy to remain and catalysts are difficult to separate
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Embodiment 1
[0127] (1) Produce fixed catalyst A
[0128] 1.26 g of poly(4-vinylpyridine) (molecular weight Mw: 100000, manufactured by Koei Chemical Ind. Co., Ltd.) was dissolved in 40 ml of dichloromethane, and then dichlorobis(benzonitrile) was slowly added thereto. Palladium(II) dichloromethane solution (dichlorobis(benzonitrile)palladium: 1.0 mmol, dichloromethane: 30 ml). Thereafter, an acetone solution of cobalt(II) chloride (cobalt(II) chloride: 5 mmol, acetone: 70 ml) was added thereto, and stirred at room temperature for 2 hours. Subsequently, the precipitate was filtered, washed with acetone and dried under vacuum at 60° C. for 24 hours. The expected immobilized catalyst A was obtained in a yield of 1.90 g.
[0129] (2) Confirm catalyst performance
[0130] Charge in a 30ml volume autoclave: 4.16mmol bisphenol A, 52.5mg immobilized catalyst A obtained in (1) above, 0.625mmol tetrabutylammonium bromide, 0.125mmol benzoquinone, 1.0g synthetic zeolite A -3 powder (particle size...
Embodiment 2
[0132] (1) Production of fixed catalyst B
[0133] The same procedure as in Example 1(1) was carried out except that poly(2-vinylpyridine) (molecular weight Mw: 18000, produced by Koei Chemical Ind. Co., Ltd.) was used except in Example 1(1). instead of poly(4-vinylpyridine). The expected immobilized catalyst B was obtained in a yield of 1.83 g.
[0134] (2) Confirm catalyst performance
[0135] Carry out the same procedure among the embodiment 1 (2), and the difference with embodiment 1 (2) is to use the immobilized catalyst B prepared in the above (1) to replace the immobilized catalyst A. Table 1 shows the yield and molecular weight (Mn, Mw) of the obtained polycarbonate prepolymer.
Embodiment 3
[0137] (1) Produce fixed catalyst C
[0138] Carry out the same step among the embodiment 1 (1), difference with embodiment 1 (1) is to use 1.43g poly(6-methyl-2-vinylpyridine) (molecular weight Mw: 58000, by Koei ChemicalInd.Co ., Ltd. production) instead of 1.26 g of poly (4-vinylpyridine). The expected immobilized catalyst C was obtained in a yield of 2.12 g.
[0139] (2) Confirm catalyst performance
[0140] The same procedure as in Example 1(2) was carried out, except that 56.4 mg of fixed catalyst C obtained in the above (1) was used instead of 52.5 mg of fixed catalyst A from Example 1(2). Table 1 shows the yield and molecular weight (Mn, Mw) of the obtained polycarbonate prepolymer.
[0141] Reference Example 1
[0142] The synthesized zeolite and immobilized catalyst isolated in Example 1(2) were dried under vacuum at 130° C. for 24 hours. In a 30ml volume autoclave was charged: 4.16mmol bisphenol A, dry synthetic zeolite and immobilized catalyst (total amount ...
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