Double metal cyanide complex catalyst and method for producing same, double metal cyanide complex slurry catalyst and method for producing same, and polymer production method
AssigneeAGC Inc.
InventorsHajime TAKEDA, Takeaki ARAI
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Abstract
The present invention pertains to a double metal cyanide complex catalyst having a moisture content of 8,000 to 140,000 ppm as determined by the Karl Fischer method, and having diffraction peaks at 2θ=36° and 2θ=47°, but no diffraction peak at 2θ=34°, in an X-ray diffraction pattern.
Claims9
A double metal cyanide complex catalyst for epoxide polymerization reactions, wherein metal species contained in said double metal cyanide complex catalyst are zinc and cobalt,
- the double metal cyanide complex catalyst having a moisture content of 8,000 to 140,000 ppm in accordance with a Karl Fischer method, and having diffraction peaks at 2θ=36° and 2θ=47°, but no diffraction peak at 2θ=34° in an X-ray diffraction pattern.
A method for producing a double metal cyanide complex catalyst for epoxide polymerization reactions,
- the method comprising coordinating an organic ligand to a reaction product obtained by reacting a metal halide salt with a transition metal cyanide compound,
- wherein a metal of said metal halide salt is zinc, and a transition metal of said transition metal cyanide compound is cobalt, and,
- after coordinating said organic ligand, a moisture content of said double metal cyanide complex catalyst is adjusted so that a moisture content of said double metal cyanide complex catalyst in accordance with a Karl Fischer method is from 8,000 to 140,000 ppm, and diffraction peaks are present at 2θ=36° and 2θ=47°, but a diffraction peak is absent at 2θ=34° in an X-ray diffraction pattern of said double metal cyanide complex catalyst.
A method for producing a double metal cyanide complex slurry catalyst containing a double metal cyanide complex catalyst for epoxide polymerization reactions,
- in which metal species contained in said double metal cyanide complex catalyst are zinc and cobalt,
- the method comprising:
- a slurry preparation step of preparing a slurry containing said double metal cyanide complex catalyst and a dispersion medium;
- and
- a moisture adjustment step of adjusting a moisture content of said slurry so that a moisture content of said double metal cyanide complex catalyst in accordance with a Karl Fischer method is from 8,000 to 140,000 ppm, a moisture content of said dispersion medium in accordance with the Karl Fischer method is 500 ppm or less, and diffraction peaks are present at 2θ=36° and 2θ=47°, but a diffraction peak is absent at 2θ=34° in an X-ray diffraction pattern of said double metal cyanide complex catalyst.
Dependencies are inferred from the claim text.