
************
The manufacture process of nicotinic acid based on ammonia oxidation method, which is introduced in this article, reached 99% conversion of 3-methyl pyridine.
本文介绍的基于氨氧化法生产烟酸的工艺,选择了适当的复合催化剂,使原料3-************转化率可达99%,技术水平达到国外先进水平。
A method was established for determining two intermediates in synthesis of imidacloprid, 2 chloro 5 methyl pyridine and 2 chloro 5 chloromethyl pyridine by HPLC.
建立了用高效液相色谱法同时测定农药吡虫啉中间体2 -氯- 5 -************和2 -氯- 5 -*********吡啶含量的方法。
In the picoline pyrolysis experiment, the methyl disengages from aromatic ring to form methane firstly, then the following reaction of the aromatic ring is similar to pyridine.
************的热稳定性比吡啶差,热解时甲基首先脱离芳香环进入气相,随后芳香环的反应途径和吡啶类似;
The quantitative relationships between the catalytic ability of Rh-complex of 2-vinyl pyridine-methyl methacrylate copolymer and the sequence structures of the copolymer ligands have been determined.
本工作定量测定了2-*********吡啶-甲基*********甲酯-铑络合物的烯烃催化加氢性能与共聚物配体序列结构的关系。
N-Methyl-N-vinylacetamide was synthesized from N-methylacetamide and vinyl acetate with N, N-dimethylamino pyridine (DMAP) as catalyst.
以N-甲基乙酰胺、***************为原料,N,N-************吡啶(DMAP)为催化剂,合成N-甲基-N-*********乙酰胺。
甲基吡啶(methylpyridine)是一类吡啶的甲基衍生物,化学式为C₆H₇N,由吡啶环上的一个氢原子被甲基(-CH₃)取代形成。根据甲基取代位置不同,存在三种主要异构体:2-甲基吡啶(α-甲基吡啶)、3-甲基吡啶(β-甲基吡啶)和4-甲基吡啶(γ-甲基吡啶)。
甲基吡啶的物理性质因异构体而异。例如:
甲基吡啶对皮肤和呼吸道有刺激性,操作需佩戴防护设备。其生物降解性较低,排放需遵守《化学污染物控制标准》。
methylpyridine(甲基吡啶)是吡啶的衍生物,指吡啶环上的一个氢原子被甲基(-CH₃)取代形成的化合物。以下是详细解释:
如需了解具体异构体的CAS号或更详细物性参数,可参考化学数据库(如、7)。
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