溶剂抽提-选择性加氢脱硫组合技术的开发及工业应用

针对以硫含量和烯烃含量高、芳烃含量低的催化裂化汽油为原料加氢脱硫生产满足车用汽油(Ⅴ)标准的汽油(简称国Ⅴ标准汽油)时辛烷值损失偏大的问题,开发了催化裂化汽油溶剂抽提-选择性加氢脱硫组合技术(简称RCDS技术)。中试结果表明,采用RCDS技术处理具有上述特点的催化裂化汽油生产国Ⅴ标准汽油时的RON损失比单独采用选择性加氢脱硫技术时减少0.9～1.9个单位。工业应用结果表明,采用RCDS技术处理硫质量分数为418～460μg/g、烯烃体积分数为27.6%～27.9%、芳烃体积分数为19.2%～19.3%的催化裂化汽油,当产品硫质量分数降低至7μg/g时,汽油RON损失仅为1.0～1.3个单位,且装置汽油收率高达99.9%。

DEVELOPMENT AND INDUSTRIAL APPLICATION OF SOLVENT EXTRACTION- SELECTIVE HYDRODESULFURIZATION COMBINATION TECHNOLOGY

Aiming at the problem of large RON loss in the production of national Ⅴ standard gasoline from the catalytic cracking gasoline feed with high sulfur content，high olefin content and low aromatic content，solvent extraction and selective hydrodesulfurization combined technology（Referred to as RCDS technology） was developed. The results of the pilot test show that the RON loss is reduced by 0.9-1.9 units when using RCDS technology to process the catalytic cracking gasoline with the above characteristics producing national V standard gasoline compared with the selective hydrodesulfurization technology. Industrial application results show that using this technology to process Qingjiang catalytic cracking gasoline with sulfur mass fraction of 418-460 μg/g, olefin volume fraction of 27.6%-27.9%, and aromatic volume fraction of 19.2%-19.3%，When the product sulfur content is reduced to 7 μg/g，the gasoline RON loss is only 1.0-1.3 units，and the gasoline（C5+）yield is as high as 99.9%.