The extraction of methanol is the main synthesis method, there are a few from the destructive distillation of wood as by-product recovery. Chemical reaction type synthesis: 2H2 + CO, CH3OH methanol synthesis can be solid (such as coal, coke) liquid (such as crude oil, heavy oil, light oil) or gases (such as natural gas and other flammable gas) as raw materials. The gas purification (FGD) transformation, removal of carbon dioxide, preparation of certain synthetic gas (carbon monoxide and hydrogen). In different catalysts, with different process conditions. The yield of methanol (high pressure method of low and medium pressure method), or with synthetic ammonia and methanol (methanol method). The crude methanol after synthesis, the removal of pre distillation ether, distillation and refined methanol. High pressure method is BASF first realization method of industrial synthesis, but because of its high energy consumption, complex processing, material demanding, many by-products of products, the future will lower by ICI Pressure and medium pressure method and Lurgi low pressure and medium pressure method
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