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直接以碳化钙为炔源合成有机化合物
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作者 付如刚 李政 高磊 《化学进展》 SCIE CAS CSCD 北大核心 2019年第9期1303-1313,共11页
以往利用碳化钙作为原料制备有机化学品时,首先须将碳化钙转化成乙炔气体,再由乙炔气体进一步制备有机化合物,而乙炔气体易燃易爆,反应条件苛刻,应用受到一定限制。碳化钙可以由可再生的生物炭在较低的温度下快速制备,是一种绿色经济的... 以往利用碳化钙作为原料制备有机化学品时,首先须将碳化钙转化成乙炔气体,再由乙炔气体进一步制备有机化合物,而乙炔气体易燃易爆,反应条件苛刻,应用受到一定限制。碳化钙可以由可再生的生物炭在较低的温度下快速制备,是一种绿色经济的化工原料。因此,直接利用碳化钙作为绿色炔源代替乙炔气体、乙炔试剂制备各种重要有机化学品将是一条简洁的绿色化学途径。本文综述了直接以碳化钙为炔源合成有机化合物的反应类型、反应机理以及研究现状,展望了碳化钙作为固体炔源构建有机化合物的发展趋势。 展开更多
关键词 碳化钙 炔源 有机合成
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Thermo-mechanical and Experimental Analysis of Double Pass Line Heating
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作者 Pankaj Biswas N. R. Mandal +1 位作者 O. P. Sha M. M. Mahapatra 《Journal of Marine Science and Application》 2011年第2期190-198,共9页
The present investigation deals with process analysis of oxy-acetylene flame assisted double pass line heating for varying plate thickness, oxy-acetylene flame as the heat source for multi pass line heating to achieve... The present investigation deals with process analysis of oxy-acetylene flame assisted double pass line heating for varying plate thickness, oxy-acetylene flame as the heat source for multi pass line heating to achieve 3-D bending of plates with varying thicknesses was studied. The oxy-acetylene flame was modeled as the moving heat source in the FEM analysis. The transient thermal histories were predicted taking into account the temperature dependent thermo-mechanical properties. A comparative study between single pass and double pass line heating residual deformation was also carried out. The temperature distribution and residual detbrmations predicted by the numerical model developed in the present work compared fairly well with those of the experimental ones. 展开更多
关键词 double pass thermal history residual defolxnations 3-D FEM transient analysis elasto-plastic analysis oxy-acetylene gas torch
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