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US 12,312,442 B2Granted
Method for separating organic zinc catalyst using filtering membrane
AssigneeLG Chem, Ltd.
InventorsKyung Min Min, Sung Kyoung Kim, Seung Young Park, Sang Cheol Shin
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Abstract
The present disclosure relates to a method for separating an organic zinc catalyst dispersed in a polyalkylene carbonate resin solution by filtering the polyalkylene carbonate resin solution using a composite filtering membrane, which is a composite material comprising a hydroxyl group-containing material and polyolefin material and has a form in which one or both surfaces of the polyolefin material is coated with the hydroxyl group-containing material.
Claims10
A method for separating an organic zinc catalyst, the method comprising:
- filtering, through a composite filtering membrane, a polyalkylene carbonate resin solution containing a polyalkylene carbonate resin and an organic zinc catalyst,
- wherein the composite filtering membrane is a composite material comprising a hydroxyl group-containing material and a polyolefin material,
- wherein the composite filtering membrane has a form in which one or both surfaces of the polyolefin material is coated with the hydroxyl group-containing material, and
- wherein the hydroxyl group-containing material is coated with a thickness of 10 μm to 10 mm.
1 more element
Dependencies are inferred from the claim text.