Gamma-butyrolactone composition and method for producing same
View Patent ↗An object of the present invention is to provide high-purity gamma-butyrolactone (GBL) capable of preventing occurrence of reaction other than the object at the time of use, which reaction is caused due to a high acidity of GBL, and the present invention relates to a gamma-butyrolactone composition containing gamma-butyrolactone and a nitrogen-containing compound, wherein a content of the gamma-butyrolactone is 99.0% by mass or more, and a total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom.
1. A gamma-butyrolactone composition, comprising:
gamma-butyrolactone; and
a nitrogen-containing compound,
wherein a content of the gamma-butyrolactone is 99.0% by mass or more, and a total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom.
2. The gamma-butyrolactone composition according to claim 1 ,
wherein an acid number is 10 mg-KOH/g or less.
3. The gamma-butyrolactone composition according to claim 1 ,
wherein an acid number is 0.05 to 0.9 mg-KOH/g.
4. The gamma-butyrolactone composition according to claim 1 ,
wherein an acid number is 0.05 to 0.5 mg-KOH/g.
5. The gamma-butyrolactone composition according to claim 1 ,
wherein a difference between a boiling point at atmospheric pressure of the nitrogen-containing compound and a boiling point at atmospheric pressure of the gamma-butyrolactone is within 50° C.
6. The gamma-butyrolactone composition according to claim 1 ,
wherein a molecular weight of the nitrogen-containing compound is 1,000 or less.
7. The gamma-butyrolactone composition according to claim 1 ,
wherein the nitrogen-containing compound is a compound represented by formula (1):
wherein R 1 to R 3 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an alkoxy group, a hydroxyl group, an amino group, an amide group, an alkylthio group, an arylthio group, an alkylcarbonyl group or an arylcarbonyl group; each of R 1 to R 3 may further have a substituent; a hetero atom may be contained in the substituent; and two groups selected from R 1 to R 3 may be bonded to each other to form a ring, provided that a sum total of the carbon atom number of R 1 to R 3 is 1 or more and 50 or less.
8. The gamma-butyrolactone composition according to claim 1 ,
wherein the nitrogen-containing compound is at least one of 2-pyrrolidone and N-methylpyrrolidone.
9. A method for producing a gamma-butyrolactone composition containing gamma-butyrolactone and a nitrogen-containing compound, in which a content of the gamma-butyrolactone is 99.0% by mass or more, and a total content of the nitrogen-containing compound is 0.1 ppm by mass to 1,000 ppm by mass as converted to a nitrogen atom,
wherein the nitrogen-containing compound is a compound derived from succinic acid or a succinic acid derivative, and
the method comprises the following steps (1) to (3):
Step (1): a step of subjecting succinic acid or a succinic acid derivative to hydrogenation reaction to obtain crude gamma-butyrolactone;
Step (2): a step of distilling the gamma-butyrolactone to distill off a low boiling compound and a high boiling compound; and
Step (3): a step of flowing the gamma-butyrolactone obtained in the step (2) through a cation exchange resin to achieve purification.