氧化还原法分离润滑油基础油中硫化物的研究

为了建立一套切实可行的氧化还原法分离润滑油基础油中各类硫化物的方案，选择氧化剂ＴＢＡＰＩ和ＭＣＰＢＡ分别对模型 经物环戊硫醚、二苯并噻吩进行氧化并选择还原剂ＬｉＡｌＨ４对各自的氧化产物进行还原，利用红外分析法考察了氧化，还原前后分子结构的变化。采用氧化还原法对高硫润滑油基础油中的含硫化合物进行了分离富集，考察了氧化和氧化剂量对分离效果的影响。利用ＧＣ／ＭＳ鉴定出的硫化物的结构和类型。结果表明，硫醚

STUDY ON SEPARATING SULFUR COMPOUNDS FROM LUBE BASE OILS BY OXIDATION REDUCTION METHOD

In order to study the feasibility of the separating scheme of sulfur compounds from lube base oils by oxidation reduction method,oxidant TBAPI and MCPMA were selected to oxidize thio lane a nd dibenzothiophene separately,reductant LiAlH 4 was used to reduce their oxidized products.The change of compound structure was indentified by IR.The conversion of oxidation reduction and recovery of sulfur compounds are all more than 80%.The oxidation reduction method was used to isolate sulfide and thiophene from lube base oils.The influence of oxidant volume and oxidation time were studied,GC/MS detected that most of the sulfides were cyclic sulfides with complex side chains and the thiophenes were alkythiophene,benzpthiophene,dibenzophene and their homologues.