A Novel Desulfurization Process for Fuel Oils Based on the Formation and Subsequent Precipitation of S-Alkylsulfonium Salts. 4. Desulfurization and Simultaneous Denitrogenation of Vacuum Gas Oil
A Novel Desulfurization Process for Fuel Oils Based on the Formation and Subsequent Precipitation of S-Alkylsulfonium Salts. 4. Desulfurization and Simultaneous Denitrogenation of Vacuum Gas Oil
复制标题
基于 S-烷基锍盐的形成和随后沉淀的新型燃料油脱硫工艺。
DOI：
10.1021/ie001091b
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
I. Komasawa
中科院分区：
文献类型：
--
作者：
Yasuhiro Shiraishi;T. Hirai;I. Komasawa
研究了以烷基化剂（CH_3I和AgBF_4）为催化剂，采用烷基化-沉淀法同时脱除减压蜡油中含硫和含氮化合物的方法。采用场离子化-质谱（FI-MS）和气相色谱-原子发射检测器（GC-AED）分别研究了减压馏分油（VGO）中各种化合物的脱硫和脱氮活性。发现VGO中的硫和氮化合物通过在温和条件下加入烷基化剂而被甲基化，并且作为相应的S-甲基锍和N，N-二甲基咔唑四氟硼酸盐的沉淀物被成功地去除。通过这种方法，VGO的硫和氮的浓度同时降低到小于0.1%和7.0%的相应的进料值，在存在下的20倍摩尔过量的CH 3 I和10倍摩尔过量的AgBF 4，分别基于初始硫浓度的...
The simultaneous removal of sulfur- and nitrogen-containing compounds from vacuum gas oil (VGO), based on alkylation and a subsequent precipitation method using alkylating agents (CH3I and AgBF4), has been investigated. Desulfurization and denitrogenation reactivities for various compounds in VGO have been studied by means of field ionization−mass spectrometry (FI−MS) and gas chromatography−atomic emission detection (GC−AED), respectively. The sulfur and nitrogen compounds in the VGO were found to be methylated by the addition of the alkylating agents under moderate conditions and were removed successfully as the precipitates of the corresponding S-methylsulfonium and N,N-dimethylcarbazolium tetrafluoroborates. By this means, the sulfur and nitrogen concentrations of the VGO were reduced simultaneously to less than 0.1% and 7.0% of the corresponding feed values, in the presence of a 20-fold molar excess of CH3I and a 10-fold molar excess of AgBF4, respectively, based on the initial sulfur concentration of...