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Seiichi Ohyama 《Topics in Catalysis》2003,22(3-4):337-343
Catalytic systems composed of copper-based oxides and alkali alkoxides are tested for low-temperature methanol synthesis in liquid phases, which involves carbonylation of methanol to methyl formate and consecutive hydrogenation of methyl formate to methanol. The effects of reaction variables on the catalytic performance are investigated under the conditions of 373-423K temperature and 1.5-5.0 Mpa pressure. The combined catalytic systems of copper chromite and potassium methoxide exhibit excellent activities for the production of methanol. Higher values of reaction temperature, initial pressure, catalyst loading, and H2/CO ratio of the feed gas lead to higher methanol productivity. In particular, the reaction temperatures and the feed gas compositions strongly influence the catalytic performance. No methanol is formed when employing a feed gas containing 2% CO2. The catalytic systems are deactivated in a short period even in a CO2-free feed gas, due to the consumption of the alkoxide component. Alkali alkoxides are consumed through reactions with trace amounts of CO2 and H2O which are formed as by-products during the course of the runs. The results also suggest that the hydrogenation step of methyl formate over copper chromite is greatly accelerated in the presence of the alkali alkoxide. 相似文献
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综述甲醇羰基化法,甲醇脱氢法,合成气直接合成法3种甲酸甲酯(MF)合成工艺及丙酸甲酯、乙醇酸甲酯、丙烯酸甲酯、甲醇等下游化学品最近几年的开发研究情况。 相似文献
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甲醇是大宗化工产品,甲酸甲酯(MF)是新一代C_1化工产品的基础中间体之一。本文介绍以合成气为原料,低温低压液相催化联产甲醇和MF的新工艺,该工艺反应温度低,利用浆态床反应器。与ICI公司的通用合成甲醇工艺及甲醇羰化法制造甲酸甲酯工艺相比,均显示了操作条件温和、成本低等优点,在国际上亦处于领先地位,这一新工艺的开发将会提升我国有关产品的国际竞争能力。 相似文献
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Catalytic synthesis of methyl formate has been investigated by a novel route starting from methyl nitrite in vapor phase. The acidic sites of the catalysts play a crucial role for the catalytic activity and the selectivity of formation of methyl formate. The H-Y zeolite catalyst gave higher yield and selectivity of the target product. This study provides a new approach for the synthesis of methyl formate from methanol via methyl nitrite. 相似文献
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介绍了甲酸酯化法、甲醇催化脱氢法、合成气直接合成法、甲醇羰基化法等甲酸甲酯的7种合成方法及制甲酰胺、二甲基甲酰胺、甲酸、醋酸等方面的7种用途 相似文献
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在釜式反应器中研究了氨基磺酸催化甲醛和甲酸甲酯偶联反应,考察了反应温度、反应时间、原料配比和催化剂用量等因素对乙醇酸甲酯和甲氧基乙酸甲酯生成量的影响,最佳反应条件为: 反应温度150~160 ℃,反应时间4 h,n(甲醛):n(甲酸甲酯)=05,在此条件下得到最大的乙醇酸甲酯和甲氧基乙酸甲酯的生成量,总生成量达到2134 mmol·(g-cat)-1。与其他催化剂的性能进行对比发现,氨基磺酸对催化甲醛和甲酸甲酯偶联反应显示出较好的催化性能。 相似文献