甲醇介绍（Introduction of methanol）.docVIP

甲醇介绍（Introduction of methanol） Introduction of methanol Physical and chemical properties Methanol is a colorless, transparent, flammable and volatile poisonous liquid. It is non corrosive to metals at room temperature (except lead and aluminum) and has a slight alcohol flavor. Molecular weight 32. 04, relative density 0. 792 (20/4 DEG C), melting point -97. 8 DEG C, boiling point 64. 5 DEG C, flash point 12. 463 self ignition point 22. 89, vapor density 1. 11, the vapor pressure 13. 33KPa (100mmHg21. 2 degrees Celsius, explosion limit of mixture of steam and air 6~36. 5% (volume ratio), with water, ethanol, ethyl ether, benzene, ketones, halogenated hydrocarbons and other organic solvent miscible, heat, fire or flammable oxidant. Combustion reaction: CH3OH+O2 to CO2+H2O use Methanol is widely used as the basic organic chemical raw material and high quality fuel. Mainly used in chemical industry, plastic and other fields, used to produce formaldehyde, acetic acid, methyl chloride, ammonia sulfate, two methyl ester and other organic products, is one of the important raw material of pesticide and medicine. After deep processing, methanol can be used as a new type of clean fuel, and also blended with gasoline. System of law The production of methanol is mainly synthetic method, there are still a small amount of distillation from wood as by-product recovery. The synthetic chemical formula is: 2H2+CO to CH3OH The synthesis of methanol can be solid (such as coal, coke) liquid (such as crude oil, heavy oil, light oil) or gases (such as natural gas and other combustible gas) as raw material, made by gas purification (FGD) transformation, removal of carbon dioxide, preparation of synthesis gas (carbon monoxide and hydrogen). In the presence of different catalysts, different process conditions were chosen. Yield per unit area methanol (high pressure method, low pressure and medium pressure method), or methanol production with synthetic ammonia (combined alcohol method). The sy