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| 1 | Catalytic performance of Cu-and Zr-modified beta zeolite catalysts in the methylation of 2-methylnaphthalene显示文摘2,6-Dimethylnaphthalene(2,6-DMN) is a commercially important chemical for the production of polyethylenenaphthalate and polybutylene naphthalate. However, its complex synthesis procedure and high production cost significantly reduce the use of 2,6-DMN. In this study, the synthesis of 2,6-DMN was investigated with methylation of 2-methylnaphthalene(2-MN) over metal-loaded beta zeolite catalysts including beta zeolite, Cu-impregnated beta zeolite and Zr-impregnated beta zeolite. The experiments were performed in a fixed-bed reactor at atmospheric pressure under a nitrogen atmosphere. The reactor was operated at a temperature range of 400–500 °C and varying weight hourly space velocity between 1 and 3 h^(-1).The results demonstrated that 2,6-DMN can be synthesized by methylation of 2-MN over beta type zeolite catalysts.Besides 2,6-DMN, the product stream also contained other DMN isomers such as 2,7-DMN, 1,3-DMN, 1,2-DMN and 2,3-DMN. The activity and selectivity of beta zeolite catalyst were remarkably enhanced by Zr impregnation, whereas Cu modification of beta zeolite catalyst had an insignificant effect on its selectivity. The highest conversion of 2-MN reached81%, the highest ratio of 2,6-DMN/2,7-DMN reached 2.6 and the highest selectivity of 2,6-DMN was found to be 20% by using Zr-modified beta zeolite catalyst. | Fatih Gülec Farooq Sher Ali Karaduman | 2019 | Petroleum Science2019，16，1： | 8 |
| 2 | Methylation of 2-Methylnaphthalene with Methanol over NH_4 F and Pt Modified HZSM-5 Catalysts显示文摘Shape-selective methylation of 2-methylnaphthalene (2-MN) was carried out over NH 4 F and Pt modified HZSM-5 (SiO 2 /Al 2 O 3 = 83) catalysts in a fixed-bed down-flow reactor using methanol as methylating agent and 1,3,5-trimethylbenzene (1,3,5-TMB) as a solvent. Pt promoted HZSM-5 catalysts showed low concentration of coke-like polycondensed aromatics, NH 4 F modification decreased non-shape-selective acid sites. After Pt and NH 4 F co-modification, both conversion of 2-MN and selectivity to 2,6-DMN were improved. 6%NH 4 F/0.5%Pt/HZSM-5 catalyst exhibited 13.8% of 2-MN conversion with 6.2% of 2,6-DMN yield after 7 h time on stream (TOS), and 2,6-/2,7-DMN ratio of 1.7 after 10 h of TOS. | 赵亮 郭新闻 刘民 王祥生 宋春山 | 2010 | Chinese Journal of Chemical Engineering2010，18，5： | 6 |
| 3 | MgO沉积改性HZSM-12分子筛的结构表征与催化性能显示文摘采用化学液相沉积法用MgO对HZSM-12分子筛进行表面沉积改性,对改性分子筛的结构、酸性进行了表征,研究了改性HZSM-12分子筛对萘和甲醇烷基化的催化反应性能。结果表明MgO与HZSM-12分子筛的表面羟基发生作用,减少了分子筛的Bronsted酸中心,而产生了新的Lewis酸中心。用于催化萘和甲醇烷基化的反应结果表明,由于MgO沉积减少了HZSM-12分子筛的强酸中心,有效地提高了HZSM-12分子筛的抗积炭失活能力。 | 吴伟 孙可一 闫鹏飞 | 2008 | 现代化工2008，28，5： | 3 |
| 4 | 固体催化剂氟改性方法及应用研究进展显示文摘介绍了对固体催化剂进行氟改性的两种方法,并叙述了改性催化剂在催化反应中的应用。改性后氟元素的引入能对催化剂的酸性位点进行调节,提高催化剂表面活性位点的覆盖度以及减小反应分子的内扩散阻力,使催化剂具有更高的活性及稳定性。 | 吕婧 张伟 杨志强 李娇毅 唐晓博 吕剑 | 2012 | 化学世界2012，53，9： | 3 |
| 5 | 氯铝酸盐离子液体催化合成2,6-二甲基萘的工艺研究显示文摘通过转移甲基化反应合成2,6-二甲基萘,考察了催化剂种类、离子液体催化剂用量、原料种类、转移甲基化试剂种类以及反应温度对2,6-二甲基萘选择性和收率的影响。以β-甲基萘为原料,Et 3NHCl-AlCl 3离子液体催化剂和反应原料摩尔比为1∶1,反应温度为40℃时,2,6-二甲基萘收率为39.2%。 | 徐啸峰 王继元 汪洋 孙海龙 魏延雨 刘经伟 | 2019 | 精细石油化工2019，36，6： | 3 |
| 6 | 纳米晶堆积结构ZSM-5微球的合成及其在2-甲基萘甲基化中的应用显示文摘以乙烯基三乙氧基硅烷和正硅酸乙酯为双硅源,采用变温晶化法合成纳米晶堆积结构ZSM-5微球,并采用XRD、FT-IR、SEM、TEM和N2吸附-脱附手段对其进行结构表征,考察了其对2-甲基萘(2-MN)与甲醇烷基化合成2,6-二甲基萘(2,6-DMN)反应的催化性能。结果表明,所合成样品是由若干纳米晶堆积而成的高度晶化的ZSM-5分子筛,在合成2,6-DMN反应中显示出较高的催化活性和选择性,2-MN转化率最高可达39.2%,反应至8h时,2,6-DMN产率为7.1%,2,6-/2,7-DMN摩尔比可达1.9,主要归结于其较多的酸量和较弱的酸强度。 | 靳立军 刘斯宝 胡浩权 | 2015 | 石油学报(石油加工)2015，31，3： | 3 |
| 7 | Co改性SAPO-11分子筛择形催化2-甲基萘烷基化反应显示文摘2,6-二甲基萘(2,6-DMN)是一种高附加值的聚酯单体。通过水热法合成SAPO-11分子筛,再经不同浓度Co(NO3)2进行改性,并用于催化2-甲基萘(2-MN)烷基化反应制备2,6-DMN。结果表明:经Co改性后的SAPO-11分子筛催化剂,2-MN转化率有一定程度降低,但是2,6-DMN选择性以及2,6-DMN和2,7-DMN(2,7-二甲基萘)物质的量之比(2,6-/2,7-DMN比)均有不同程度的提升。其中,Co质量分数为3%的Co/SAPO-11分子筛具有较高的活性,在400℃下反应3 h后,2,6-DMN的选择性和2,6-/2,7-DMN比分别达到了44.1%和2.06。Co浸渍修饰了SAPO-11分子筛的孔道结构并调变了分子筛的酸性性质,提高了催化剂的催化性能。 | 文志辉 刘清华 张荣斌 冯刚 | 2022 | 化学反应工程与工艺2022，38，6： | 0 |
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