无苛性碱精制工艺在催化汽油脱臭中的工业应用

以催化裂化装置精制前的稳定汽油为原料,采用THS-1脱硫化氢催化剂、TM-1脱硫化氢助剂以及AFS-12脱硫醇催化剂、HY-1脱硫醇助剂,经无苛性碱精制工艺,制备了精制汽油。结果表明,稳定汽油经精制脱硫后,汽油腐蚀级别由三级下降到一级;试样1汽油硫醇质量分数由0.002 5%下降到0.000 4%,试样2的由0.002 3%下降到0.000 3%;试样1的总硫质量分数由0.007%下降到0.003%,试样2的由0.009%下降到0.004%;试样1和试样2脱除硫化氢质量分数分别为0.001 9%,0.003 0%;说明催化汽油无苛性碱精制工艺脱硫效果明显。与苛性碱预碱洗工艺相比,利用无苛性碱精制工艺精制催化汽油,整个过程不产生废碱液,有利于环保,且每年可节省装置运行费用6万元。

Industrial application of alkali-free refining technology in thiol removal process for fluidized-bed catalytic cracking gasoline

The refining gasoline was prepared by alkali -free refining technology with THS -1 as hydrogen sulfide removal catalyst,TM - 1 as its assistant,AFS - 12 as thiol removal catalyst, HY - 1 as its assistant, and fluidized - bed catalytic cracking （FCC） gasoline as raw material. The results showed that after the desulfuration, the corrosion level of gasoline was decreased from three to one. The mass fraction of thiol in gasoline sample 1 was reduced from 0. 002 5% to 0. 000 4% , in gasoline sample 2 from 0. 002 3% to 0. 000 3%. The mass fraction of sulfur in gasoline sample 1 was reduced from 0.007% to 0.003%, in gasoline sample 2 from 0. 009% to 0. 004%. The mass fractions of hydrogen sulfide removal in sample 1 and sample 2 were 0. 001 9% and 0.003 0% respectively. The desulfuration of alkali - free refining technology was obvious. Compared with alkali refining technology, no waste alkali engendered during the process. It was favorable for environment protection. The running cost was saved by 60 thousands yuan per year.