载体活化对PW12/炭化树脂催化剂醚化活性的影响

以大孔强酸性阳离子交换树脂为前驱体制备了炭化树脂, 以此为载体, 通过负载磷钨酸(PW_l2)制备了炭化树脂载磷钨酸催化剂。考察了炭化树脂活化条件对表面性能和磷钨酸负载量及负载牢固程度的影响。固体酸催化剂PW_l2在炭化树脂吸附过程中受预处理的影响。实验结果表明, HNO₃ 活化效果好于HCl、H₂SO₄和H₃PO₄ , HNO₃ 处理液的最佳浓度为4.5 mol/ L。在反应温度为70 ℃、醇烯摩尔比为1 .1 、压力为1 .0 MPa 、空速为1.0 h^-1的条件下进行了催化裂化轻汽油与甲醇的醚化试验, 叔碳烯烃转化率达到56.68 %, 高于D005 阳离子交换树脂催化剂。

Effect of Carrier Activation on Etherification Activity of PW12/Carbonized Resin Catalyst

The carbonized resin was prepared using strong acid cation exchange resin as the precursor. Using the carbonized resin as carrier, the carbonized resin supported PW_(12) catalyst was prepared by loading PW_(12) on the carbonized resin.Effect of activation condition of the carbonized resin on the surface performance,loadings of PW_(12) and stability of PW_(12) were investigated.The adsorption process of solid acid catalyst PW_(12) on carbonized resin was influenced.Research results show that activation of HNO_3 is better than that of HCl, H_2SO_4 and H_3PO_4, and the optimal concentration of HNO_3 of the pretreatment solution is 4.5 mol/L. The etherification of light catalytic cracking gasoline and methanol was carried out under the conditions of reaction temperature is 70 ℃,methanol and olefin mole ratio is 1.1,pressure is 1.0 MPa,LHSV is 1.0 h~(-1). The conversion of tertiary carbonic olefin is up to 56.68%,which is higher than that of D005 strong acid cation exchange resin catalyst.