| 1. | Study of the purification of m - xylene and m - toluic
间二甲苯和间甲基苯甲酸分离提纯工艺的研究 |
| 2. | Mix - xylene isomer grade
异构间二甲苯 |
| 3. | Nitro - meta - xylene
硝基间二甲苯 |
| 4. | Adsorption characteristics of catalysts used for ammoxidation of m - xylene to isophthalonitrile
工业用间二甲苯氨氧化催化剂的表面吸附特征研究 |
| 5. | Toluene and m - xylene are not cancer - causing substances . their effects on health depend on the level one is exposed to and the duration of exposure
甲苯和间二甲苯并非致癌物质，对人体影响需视乎个人处于甲苯和间二甲苯成份的水平和时间。 |
| 6. | The government chemist conducted the tests again on the seventh day after unpacking the samples . it did not detect benzene , toluene and m - xylene in all the five models of plastic mats
政府化验所在样本拆封七日后再测试该五款样本，结果显示五款样本均没有验出苯、甲苯和间二甲苯成份。 |
| 7. | The order of biochemical property is toluene better than m - xylene , m - xylene better than benzene , benzene better than p - xylene , p - xylene better than ethylbenzene and ethylbenzene better than o - xylene
实验条件下生化降解难易顺序是：甲苯间二甲苯苯对二甲苯乙基苯邻二甲苯。 |
| 8. | The present paper analyses the relative volatility of ethyl - benzene / styrene and meta - xylene / styrene and para - xylene / styrene is affected by pressure variation in ethyl - benzene / styrene packed tower , and also analyses the fractional composition is affected by pressure variation in above packed tower
摘要通过模拟计算，分析乙苯苯乙烯塔压力变化对乙苯苯乙烯、间二甲苯苯乙烯、对二甲苯苯乙烯相对挥发度的影响；压力变化对塔釜乙苯含量、间二甲苯含量、对二甲苯含量及塔顶乙苯中苯乙烯浓度的影响。 |
| 9. | The substitution of pervaporation for traditional separation in organic mixtures is of energy - saving and environment - protecting significance . in this paper , pervaporation of two kinds of organic mixtures is investigated : one is using ca membrane and ca - eva ( ethylene - co - ethylene acetate ) composite membrane for methanol removal from mtbe ( methyl t - butyl ether ) , focused on the influence of casting solvent mixtures ; the other is utilizing proper membrane stuff and additive to separate p - xylene from m - xylene
本文对两类有机有机混合体系进行了渗透汽化膜过程的研究，其一为醋酸纤维素( ca )膜及ca -乙烯醋酸乙烯共聚物( eva )复合膜用于甲基特丁基醚( mtbe )中少量甲醇( 5 meoh )的脱除，探讨铸膜混合溶剂及后处理技术对膜分离性能的影响。其二为运用适当的膜材料及添加剂去除间二甲苯( mx )中的少量对二甲苯( 10 px ) 。 |
