摘要
α-甲基萘馏份中含有高浓度硫化物杂质甲基苯并噻吩，可以通过乙酸酐／过氧化氢催化氧化法脱除。以质量分数30％的过氧化氯水溶液为氧化剂，乙酸酐为催化剂，考察了n（乙酸酐）／n（H2O2）和n（HiO2）／n（S）、反应时间、原料中氮化物杂质（甲基喹啉、吲哚等）的存在对α-甲基萘中甲基苯并噻吩转化率的影响。结果表明，n（乙酸酐）／n（H2O2）对转化率有显著影响；但转化率对过氧化氢并不敏感；在40-70℃，温度的升高有利于反应的进行；在n（乙酸酐）／n（H2O2）=0．5，n（H2O2）／n（S）=16，温度为70℃，反应时间为60min时，甲基苯并噻吩转化率达96％。另外，原料中的碱性氮化物对转化率有一定的影响。
There is high concentration impurity of methylbenzothiophene （MBT） in 1 - methylnaphthalene fraction of wash oil. Acetic anhydride and hydrogen peroxide were used to remove MBT by eatalytic oxidation. The effects of n （acetic anhydride）/n （H2O2） and n（H2O2）/n（S）, reaction time and nitrogen impurities （indole and methylquinoline） on the conversion ratio of MBT were investigated with hydrogen peroxide solution（mass fraction of H2O2 is 30% ） as oxidizer and acetic anhydride as catalyst. The results show that n （acetic anhydride ）/n （H2O2） has notable effect on the conversion ratio, but the conversion ratio is insensitive to hydrogen peroxide, the temperature increase in the range of 40 to 70 ℃ promotes reaction proceeding. The conversion ratio of MBT is 96 % when n （acetic anhydride）/n （H2O2） is 0.5, n （H2O2）/n （S） is 16 and reacting for 60 rain at 70 ℃. The concentration of basic nitrogen in feed material has some effects on conversion ratio of MBT.
出处
《石油化工高等学校学报》
EI
CAS
2006年第4期15-18,共4页
Journal of Petrochemical Universities
基金
北京市属
市管高校人才强教计划资助项目(BJJWR20051102)
关键词
Α-甲基萘
甲基苯并噻吩
氧化脱硫
过氧化氢
乙酸酐
1 - Methylnaphthalene
Methylbenzothiophene
Oxidation removal of sulfur
Hydrogen peroxide
Acetic anhydride
