| 摘要 |
A PROCESS FOR EFFICIENTLY REMOVING TITANIUM OXIDE OR RED OXIDE FROM AN ETHYLENE GLYCOL SOLVOLYSIS PRODUCT OF A POLYESTER CONTAINING TITANIUM OXIDE OR RED OXIDE. THE PROCESS COMPRISES THE STEPS OF: (L) MIXING AT LEAST ONE CALCIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE, CALCIUM CARBONATE AND CALCIUM HYDROXIDE WITH A POLYESTER DECOMPOSITION PRODUCT CONTAINING TITANIUM OXIDE WHICH IS AN ETHYLENE GLYCOL SOLVOLYSIS PRODUCT OF A POLYESTER CONTAINING TITANIUM OXIDE TO AGGLOMERATE TITANIUM OXIDE CONTAINED IN THE POLYESTER DECOMPOSITION PRODUCT, OR MIXING TITANIUM OXIDE WITH A POLYESTER DECOMPOSITION PRODUCT CONTAINING RED OXIDE WHICH IS AN ETHYLENE GLYCOL SOLVOLYSIS PRODUCT OF A POLYESTER CONTAINING RED OXIDE TO AGGLOMERATE RED OXIDE CONTAINED IN THE POLYESTER DECOMPOSITION PRODUCT; AND (2) SUBJECTING THE AGGLOMERATES TO SOLID-LIQUID SEPARATION TO REMOVE TITANIUM OXIDE OR RED OXIDE FROM THE POLYESTER DECOMPOSITION PRODUCT.
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