SU202173A1 - Method of producing a, p-dehydro-y-butyrolactone - Google Patents
Method of producing a, p-dehydro-y-butyrolactoneInfo
- Publication number
- SU202173A1 SU202173A1 SU1083302A SU1083302A SU202173A1 SU 202173 A1 SU202173 A1 SU 202173A1 SU 1083302 A SU1083302 A SU 1083302A SU 1083302 A SU1083302 A SU 1083302A SU 202173 A1 SU202173 A1 SU 202173A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dehydro
- butyrolactone
- producing
- solution
- acetoxyfuran
- Prior art date
Links
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- UMYRBJJAPQINKS-UHFFFAOYSA-N furan-2-yl acetate Chemical compound CC(=O)OC1=CC=CO1 UMYRBJJAPQINKS-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ITHZDDVSAWDQPZ-UHFFFAOYSA-L Barium acetate Chemical compound [Ba+2].CC([O-])=O.CC([O-])=O ITHZDDVSAWDQPZ-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 150000004652 butanoic acids Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Description
Известен способ получени а, р-дегидро- бутиролактона , исход из производных масл ной кислоты.A known method for the preparation of a, p-dehydro-butyrolactone, starting from derivatives of butyric acid.
С целью расширени сырьевой базы, предложен способ получени а, р-дегидро-у-бутиролактона , заключающийс в том, что 2-ацетоксифуран обрабатывают разбавленной кислотой при нагревании до 70-80°С.In order to expand the raw material base, a method is proposed for the preparation of a, p-dehydro-y-butyrolactone, which consists in the fact that 2-acetoxyfuran is treated with dilute acid when heated to 70-80 ° C.
Пример. Смесь 15 г 2-ацетоксифурана и 30 мл 2,5%-ного раствора серной кислоты нагревают при перемешивании в течение 1 час на вод ной бане при температуре 70- 80°С до наступлени полной гомогенности раствора. Нагревание продолжают еш,е 15 мин, смесь охлаждают, прибавл ют рассчитанное количество уксуснокислого бари , осаДОК центрифугируют, раствор испар ют в вакууме . Остаток после удалени воды и уксусной кислоты перегон ют, собира фракцию 91-92°С (11 мм рт. ст.). Выход 7,1 г (71%Example. A mixture of 15 g of 2-acetoxyfuran and 30 ml of a 2.5% aqueous solution of sulfuric acid is heated with stirring for 1 hour in a water bath at a temperature of 70-80 ° C until the solution is completely homogeneous. Heating is continued for 10–5 minutes, the mixture is cooled, the calculated amount of barium acetate is added, the precipitate is centrifuged, and the solution is evaporated in vacuo. The residue after removal of water and acetic acid is distilled, collecting a fraction of 91-92 ° C (11 mm Hg). Yield 7.1 g (71%
пгpg
от теоретического); Пп 1,4665. Найдено, %: С 56,83; 56,88; Н 4,93; 5,04. C.HiO,. Вычислено, %: С 57,13; Н 4,79.from theoretical); PP 1.4665. Found,%: C 56.83; 56.88; H 4.93; 5.04. C.HiO ,. Calculated,%: C 57.13; H 4.79.
Предмет изобретени Subject invention
Способ получени а, |3-дегидро-у-бутиролактона , отличающийс тем, что, с целью расширени сырьевой базы, 2-ацетоксифуран обрабатывают водным раствором кислоты при нагревании до 70-80°С.The method of producing a, α-3-dehydro-y-butyrolactone, characterized in that, in order to expand the raw material base, 2-acetoxyfuran is treated with an aqueous acid solution when heated to 70-80 ° C.
Publications (1)
Publication Number | Publication Date |
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SU202173A1 true SU202173A1 (en) |
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