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US 11,976,164 B2Granted
Method of preparing organic zinc catalyst and method of preparing polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby
AssigneeLG Chem, Ltd.
InventorsSung Kyoung Kim, Seung Young Park, Sang Cheol Shin, Kyung Min Min
Life of this patent
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Abstract
The present disclosure relates to a method of preparing an organic zinc catalyst through solid phase blending that does not require a solvent and a washing process, and a method of preparing a polyalkylene carbonate resin by using the organic zinc catalyst prepared thereby.
Claims12
A method of preparing an organic zinc catalyst, the method comprising:
- mixing a solid-phase zinc compound with a solid-phase dicarboxylic acid having 3 to 20 carbon atoms in the absence of a solvent,
- wherein the mixing is performed so that the zinc compound and the dicarboxylic acid react to generate water, and
- wherein the mixing is performed by stirring using a mixer equipped with a stirrer under a condition in which a tip speed of the stirrer is less than 1.0 m/s and a Froude number of the mixer is less than 0.25.
Dependencies are inferred from the claim text.