颜料助剂1-辛基-2-吡咯烷酮的合成新方法

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.

5,7-二氯-2-辛基-1H-吲哚的合成研究

以2,4-二氯-6-碘苯胺为原料,通过Sonogashira交叉偶联反应以及环合反应合成5,7-二氯-2-辛基-1H-吲哚,反应总收率为86.8%,该反应条件温和,收率较高,产物立体选择性好,产物结构经1H NMR和MS得到了确证。

缚酸剂对合成光稳定剂944中间体4,6-二氯-2-叔辛基氨基-1,3,5-三嗪的影响

以三聚氯氰和叔辛胺为主要原料合成了光稳定剂944中间体4,6-二氯-2-叔辛基氨基-1,3,5-三嗪。实验考察了氢氧化钠、氢氧化钾、碳酸钠等无机碱和有机碱在上述合成过程中的缚酸作用,确定了较好的缚酸剂为二异丙基乙胺。与传统的氢氧化钠缚酸法相比,无水环境下使用二异丙基乙胺可杜绝三聚氯氰的水解。经实验优化,产物收率达97.0%以上,液相色谱纯度大于99.8%,以此为原料合成光稳定剂944,其收率较氢氧化钠缚酸法提高约5.0%。

Flotation behavior and adsorption mechanism of(1-hydroxy-2-methyl-2-octenyl) phosphonic acid to cassiterite

The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determination and density functional theory（DFT） calculation. The flotation results demonstrated that HEPA exhibited superior collecting performance compared with styrene phosphonic acid（SPA）. The cassiterite recovery maintained above 90% over a wide pH range of 2-9 with 50 mg/L HEPA. The results of zeta potential measurement and FTIR detection indicated that the adsorption of HEPA onto cassiterite was mainly attributed to the chemisorption between HEPA monoanions and Sn species on mineral surfaces. The DFT calculation results demonstrated that HEPA monoanions owned higher HOMO energy and exhibited a better affinity to cassiterite than SPA, which provided very clear evidence for the stronger collecting power of HEPA presented in floatation test and zeta potential measurement.

油溶性缓蚀剂ω,ω'-双(1-辛基苯并咪唑-2-基)烷烃的合成及缓蚀性能研究

合成了系列ω,ω'-双(1-辛基苯并咪唑-2-基)烷烃油溶性缓蚀剂,并通过红外、质谱等进行结构表征。通过恒电位极化曲线,考察了此类缓蚀剂在2×10-4mol/L H2S-乙醇溶液中对铜电极极化曲线的影响。结果表明,此系列油溶性缓蚀剂对铜电极具有明显的缓蚀作用,且对金属铜的缓蚀效率高,作为润滑油添加剂具有很好的应用前景。