Preparation method for 2-phenylacrylonitrile
The invention discloses a preparation method for 2-phenylacrylonitrile. Benzyl cyanide and paraformaldehyde are used as raw materials. The preparation method comprises the following steps: 1) enablingthe benzyl cyanide, the paraformaldehyde, an acid-binding agent, a phase transfer catalyst and a sol...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a preparation method for 2-phenylacrylonitrile. Benzyl cyanide and paraformaldehyde are used as raw materials. The preparation method comprises the following steps: 1) enablingthe benzyl cyanide, the paraformaldehyde, an acid-binding agent, a phase transfer catalyst and a solvent to be mixed in a reactor, warming to 50-80 DEG C and reacting for 1-3 h; and 2) after ending areaction, cooling to a room temperature, stewing and layering, taking an organic phase I positioned on the upper layer, adding diluted hydrochloric acid to the organic phase I until a pH is neutral,stewing and layering, taking an organic phase II positioned on the upper layer, after rotary-evaporating and removing the solvent, performing rectification in vacuum, to obtain the 2-phenylacrylonitrile. The 2-phenylacrylonitrile prepared by using the method has the technical advantages of high chemoselectivity and high yield.
本发明公开了种2-苯基丙烯腈的制备方法，以苯乙腈和多聚甲醛作为原料，包括以下步骤：1)、将苯乙腈、多聚甲醛、缚酸剂、相转移催化剂和溶剂于反应器中混合后，升温至50～80℃反应1～3h；2)、步骤1 |
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