颜料助剂1-辛基-2-吡咯烷酮的合成新方法

Novel synthesis method of 1-octyl-2-pyrrolidone for pigment auxiliary

以辛胺（C8H19N）、γ-丁内酯（C4H6O4）为原料,采用ZSM-5分子筛-铈复合催化剂,合成1-辛基-2-吡咯烷酮.在n（C8H19N）∶n（C4H6O4）=1.26∶1.0,反应温度255～260℃,反应时间3.0～3.5 h,反应压力4.5～5.0 MPa,复合催化剂用量0.25%（对原料总质量）条件下,γ-丁内酯转化率大于98%,目标产物1-辛基-2-吡咯烷酮选择性大于97%.该方法解决了以磷酸作为催化剂的合成工艺对设备有腐蚀,后续分离提纯困难的缺点,具有工艺简单、操作方便、转化率及选择性高、成本低的特点.

1-Octyl-2-pyrrolidone was prepared with y-butyrolactone and octylamine as raw materials us- ing ZSM-5 zeolite-cerium composite as catalyst. The conversion of γ-butyrolactone was above 98%, and the selectivity of 1-octyl-2-pyrrolidone was above 97% under the following process conditions： the molar ratio of octylamine and γ-butyrolactone was 1.26： 1.0, reaction temperature was 255-260 ℃, reaction time was 3.0N 3.5 h, reaction pressure was 4.5-5.0 MPa, and the catalyst dosage was 0.25% （on the mass of raw materials）. The method solved the shortcomings of equipment corrosion and subsequent difficulties such as separation and purification in synthesis process with phosphoric acid as catalyst. And this method had simple process, convenient operation, high conversion and selectivity, and low cost.