反応式
C([N:3]1[CH2:7][CH2:6][CH2:5][C:4]1=[O:8])=C.[NH:9]1[CH2:13][CH2:12][CH2:11][C:10]1=O>>[NH:3]1[CH2:7][CH2:6][CH2:5][C:4]1=[O:8].[C:13](#[N:9])[CH2:12][CH2:11][C:10]#[N:3]参加物
実験手順
The distillation residue, 59.1 grams, is dissolved in 16.2 grams water and mixed with 60 grams toluene. While stirring, carbon dioxide is then passed through the mixture until the pH is approximately 13.2. The potassium pyrrolidonate remaining in the residue has then been converted into pyrrolidone and potassium carbonate. The supernatant toluene layer is separated off. The remaining mixture is then extracted four times, each time with 60 grams toluene. After evaporating the toluene from the combined toluene layers, 54 grams of 98.8% pure pyrrolidone is obtained which is suitable for conversion into, for instance, N-vinyl pyrrolidone. If desired, this pyrrolidone can be recirculated to the section where the reaction mixture obtained in the preparation of pyrrolidone from succinonitrile is worked up.
出典と根拠
- ORDレコード
- ord-f713574c87e64fdab2496485ab688bd5
- 出典データセット
- uspto-grants-1983_05
- 特許番号
- US04384125
関連ノート
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