γ-Al_2O_3催化剂上合成甲硫醇的影响.pdf

石油化工
1376
PETROCHEMICAL TECHNOLOGY
2014年第43卷第12期
工艺条件对K2WO4-ZnCI2y-A203催化剂上
合成甲硫醇的影响
常弈3,郭攀2,丛轮刚,赵莺),曹建新2,刘飞3
(1.贵州大学化学与化工学院,贵州贵阳550025;2.贵州省绿色化与清洁能源技术重点实验室,贵州
贵阳50025;3.贵州省矿产资源高效利用与绿色化工技术特色重点实验室,贵州贵阳550025)
[摘要』」采用浸渍法制备了K2WO:- Zncl /Y-Al2O催化剂,利用XRD,SEM,BET,TPD等方法对该催化剂进行了表征。表征
结果显示,KWO4-ZnCl2y-Al2O3催化剂保持了典型γ-A2O2晶体结构的特征,活性组分的分散度较高,孔道为典型的圆柱型
介孔结构且孔分布较集中,同时其有弱酸位和弱碱位。考察了工艺条件对硫化氢和甲醇在KWO2-ZnCl2-AO)催化剂上生成
甲硫醇的影响。实验结果表明,硫化氢和甲醇在该催化剂上生成甲硫醇适宜的条件为:n(硫化氢):n(甲醇)=2:1、空速
2.0hl、反应温度400℃、反应压力1.0MPa。在此条件下,甲醇转化率、甲硫醇选择性和甲硫醇收率分别为87.85%,
91.43%,80.32%。
关键词硫化氢;甲醇;甲硫醇;钨基催化剂;氯化锌
文章编号]1000-8144(2014)12-1376-05
中图分类号]TQ413.24
[文献标志码]A
Effects of Process Conditions on the Synthesis of Methyl Mercaptan
over K, WO4 -Zn Cl /Y-A12O2 Catalyst
Chang Yi, Guo Pan Cong Ligang, Zhao Ying", Cao Jianxin., Liu Fei
(1. School of Chemistry and hemical Engineering, Guizhou University, Guiyang Guizhou 550025, China; 2. Guizhou Key
Laboratory for Green Chemical and Clean Energy Technology, Guiyang Guizhou 550025, China; 3. Guizhou Key Laboratory for
Efficient Utilization of Mineral and Green Chemical Technology, Guiyang Guizhou 550025, China)
I Abstract J The K WO -Zncl,/ O, catalyst was prepared by impregnation and characterized
by XRD, SEM, BET and TPD. The results showed that, the K2 WO* Cl /Y-A120 catalyst
maintained a typical crystal structure of, O; and active components were dispersed well on the
catalyst surface; the pores were typical cylindrical with mesoporous structure and the pore distribution
was relatively concentrated; there were weak acid and weak base sites on the catalyst surface
The synthesis of methyl mercaptan from hydrogen sulfide and methanol over the K2,-ZNCL2/
Y-AL20, catalyst was investigated. Under the optimum conditions of WHSV 2.0 h, n(H2S)
n (CH OH)2: 1, reaction temperature 400 C and reaction pressure 1.0 Mpa, the conversion of methanol
selectivity to methyl mercaptan and yield of methyl mercaptan were 87.85%0, 91.43%and 80.32%0, respectively.
I Keywords hydro en sulfide; methanol; methyl mercaptan; tungsten based catalyst; zinc chloride
甲硫醇作为最简单的硫醇,是一种重要的50%~60%4。推广硫化氢甲醇法合成甲硫醇工艺
精细化工中间体,可广泛应用于食品、饲料添[收稿日期]2014-06-12:「[修改稿日期]2014-09-15
加剂、农药及医药等工业2。最早的研究是以「作者简介]常弈(1987-),男,河南省周口市人,硕土生,电
ThO为催化剂,用硫化氡和甲醇合成甲硫醇,但话(0851-3604936,电邮chmn871260m。联系人:刘飞
ThO催化剂的使用温度范围较窄,甲硫醇收率很
电话
604936,电邮 cc. feiliu(@gzu.
基金项目」国家公派出国留学基金项目(201406675007);贵州
低(35%~40%)3。20世纪60年代美国 Pure Oil公
省优秀青年科技人オ专项(黔科合人字2013-14);国家大学生创新
司开发了新的A14O2催化剂,使甲硫醇收率提高至基金项日(贵大国创字201304)。