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US 2023/0399462 A1Published application
Method for purifying bis-2-hydroxylethyl terephthalate and polyester resin comprising same
AssigneeSK Chemicals Co., Ltd.
InventorsDa-Young HWANG, Kwang-Woo PARK, Yoo Jin LEE, Jong-In LEE
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Abstract
The present disclosure relates to a method for purifying bis-2-hydroxyethyl terephthalate with high purity and a polyester resin containing the same.
Claims18
A method for purifying bis-2-hydroxyethyl terephthalate, comprising the steps of:
- 1) mixing bis-2-hydroxyethyl terephthalate and water;
- 2) adding activated carbon to the mixture of step 1;
- and
- 3) recovering bis-2-hydroxyethyl terephthalate from the mixture of step 2.
1 more element
Dependencies are inferred from the claim text.