磷钨酸季铵盐催化氧化汽油深度脱硫  

Deep desulphurization of gasoline by catalytic oxidation using quaternary ammonium phosphotungstate as catalyst

作　　者：宋华[1,2] 李国忠[1] 李正光[1] 

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《燃料化学学报》2010年第4期439-444,共6页Journal of Fuel Chemistry and Technology

摘　　要：以十六烷基三甲基溴化铵和磷钨酸为原料制备了磷钨酸季铵盐催化剂,并对催化剂进行了红外光谱和SEM表征。研究了磷钨酸季铵盐为催化剂,双氧水为氧化剂,催化氧化法生产低硫汽油技术。考察了萃取剂以及氧化条件和萃取条件对脱硫效果的影响。结果表明,在汽油10 mL,双氧水0.01 mL,催化剂0.0016 g,氧化温度30℃,氧化时间60 m in的条件下,采用复合溶剂LJ-1进行萃取,萃取温度20℃,静置时间15 m in,剂油比为1时,直溜汽油中的硫含量由179.3 mg/L降至10.8 mg/L,脱硫率达94.0%。氧化萃取时的脱硫率比未经氧化直接萃取时的脱硫率高45.6%,氧化脱硫效果显著。Catalytic oxidation is an important means for deep desulfurization of oil products.In order to meet more stringent specifications of sulfur contents in oil products,studies on desulfurization methods with more selective and more active catalytic oxidation have become a hot subject.A quaternary ammonium phosphotungstate was prepared by hexadecyl trimethyl ammonium bromide and phosphotungstate.The prepared catalyst was characterized by FT-IR and SEM.The method of producing low sulfur gasoline was proposed using hydrogen peroxide as oxidant and the above catalyst.The effects of the extractants,oxidation and extraction conditions on desulphurization were examined.Under the conditions of gasoline 10 mL,hydrogen peroxide 0.01 mL,catalyst 0.001 6 g,oxidation reaction was performed at 30 ℃ with 60 min.Using the multiplex solvent LJ-1 as the extractant and the solvent/oil ratio of 1,the sulfur content of gasoline is reduced from 179.3 mg/L to 10.8 mg/L at 20 ℃ with 15 min.The desulphurization ratio reaches to 94.0%,which is higher than that of gasoline extracted directly without oxidation by 45.6%.The catalyst is high selective and low in dosage,which will be potential in gasoline desulphurization.The oxidized desulphurization effect is remarkable.

关 键 词：双氧水 磷钨酸十六烷基三甲基铵 氧化脱硫 汽油 

分 类 号：TQ028[化学工程]