1,4-butanediol-containing composition
View Patent ↗A 1,4-butanediol (1,4BG)-containing composition having high thermal stability, and having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight.
1. A 1,4-butanediol-containing composition having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and containing 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight, wherein the 1,4-butanediol-containing composition is used to produce tetrahydrofuran.
2. The 1,4-butanediol-containing composition according to claim 1 , which has a pH is 5.0 or more and not more than 7.9.
3. The 1,4-butanediol-containing composition according to claim 1 , which has a thermal stability as measured by the formation of tetrahydrofuran of not greater than about 2998 ppm by weight.