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US 11,247,975 B2Granted
Process for purifying an alkylene oxide composition
AssigneeSK Picglobal Co., Ltd.
InventorsHanna Kim, Doojin Lee, Eun Su Lee, Taechan Ha, Dong Kyun Noh, Soo Hyun Park, Sungho Kim
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Abstract
Embodiments provide a process for purifying an alkylene oxide composition, which comprises (1) obtaining a crude alkylene oxide composition comprising an ionic component; (2) passing the crude alkylene oxide composition through a molecular sieve; and (3) obtaining a purified alkylene oxide composition. A purified alkylene oxide composition suitable for a subsequent process can be obtained.
Claims15
A process for purifying an alkylene oxide composition, which comprises:
- (1) obtaining a crude alkylene oxide composition comprising an ionic component;
- (2) passing the crude alkylene oxide composition through a molecular sieve;
- and
- (3) obtaining a purified alkylene oxide composition,
- wherein the ionic component comprises a nitrogen-containing ionic component,
- wherein the crude alkylene oxide composition in the above step (1) has a controlled polymerization rate (CPR) of 0.2 to 20,
- wherein the CRP is a value measured according to the test method of ASTM D6437, and
- wherein 30 g of the crude alkylene oxide composition is mixed with 100 ml of methanol, and the amount of hydrochloric acid (concentration:
- 0.001 N) for neutralization titration is measured.
6 more elements
Dependencies are inferred from the claim text.