Method for stabilizing high-purity ethylene carbonate-containing composition
AssigneeMitsubishi Chemical Corporation
InventorsKouki MINEMOTO, Takayuki ISOGAI
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Abstract
To provide a novel stabilization method for suppressing over-time denaturation of a high-purity ethylene carbonate-containing composition, a stabilized high-purity ethylene carbonate-containing composition, and the like. A method for stabilizing a high-purity ethylene carbonate-containing composition includes adjustment of content of the total of formic acid and a formic acid salt, or 2-chloroethanol to 500 ppm by mass or less in the high-purity ethylene carbonate-containing composition including 90% by mass or more ethylene carbonate.
Claims9
A method for stabilizing a high-purity ethylene carbonate-containing composition,
- wherein the method comprises
- a step of adjustment of content of the total of formic acid and a formic acid salt in a high-purity ethylene carbonate-containing composition comprising 90% by mass or more ethylene carbonate to 500 ppm by mass or less.
A method for stabilizing a high-purity ethylene carbonate-containing composition,
- wherein the method comprises
- a step of adjustment of the content of 2-chloroethanol in a high-purity ethylene carbonate-containing composition comprising 90% by mass or more ethylene carbonate to 500 ppm by mass or less.
A stabilized high-purity ethylene carbonate-containing composition comprising
- 90% by mass or more ethylene carbonate, and
- 500 ppm by mass or less in total of formic acid and a formic acid salt.
A stabilized high-purity ethylene carbonate-containing composition,
- wherein the composition comprises
- 90% by mass or more ethylene carbonate, and
- 500 ppm by mass or less of 2-chloroethanol.
A method for producing a high-purity ethylene carbonate-containing composition comprising 90% by mass or more ethylene carbonate,
- wherein the method comprises the following steps:
- (1) a reaction step of providing an ethylene carbonate-containing composition by reacting ethylene oxide with carbon dioxide;
- (2) a step of measuring the total content of formic acid and a formic acid salt, or the content of 2-chloroethanol in the ethylene carbonate-containing composition;
- and
- (3) a step of selecting the ethylene carbonate-containing composition having a total content of the formic acid and the formic acid salt or a content of the 2-chloroethanol, of 500 ppm by mass or less.
Dependencies are inferred from the claim text.