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Methanol

Issuing time:2020-07-31 10:42


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Methanol (CH3OH) is the most simple saturated monohydric alcohol with CAS No. 67-56-1 or 170082-17-4, molecular weight of 32.04 and boiling point of 64.7 ℃. It is also called "xylol" or "Xylin" because it is first found in retorted wood. The lowest dose of poisoning is about 100 mg / kg body weight. Oral intake of 0.3-1 g / kg can cause death. It can be used to produce formaldehyde and pesticide, as extractant of organic matter and denaturant of alcohol. The finished product is usually prepared by the reaction of carbon monoxide with hydrogen.


Application Area


1. One of the basic organic raw materials, which is used to produce various organic products such as methyl chloride, methylamine and dimethyl sulfate. It is also the raw material of pesticide (insecticide, acaricide), medicine (sulfonamides, oxytetracycline, etc.), and one of the raw materials for synthesis of dimethyl terephthalate, methyl methacrylate and methyl acrylate


2. The main application field of methanol is the production of formaldehyde. Formaldehyde can be used to produce adhesives, mainly used in wood processing industry, and then used as a treatment agent for molding plastics, coatings, textiles and paper.


3. Another main use of methanol is to produce acetic acid. The consumption of acetic acid accounts for about 7% of the global methanol demand, which can produce vinyl acetate, acetate fiber and acetate, etc., and its demand is closely related to the demand of coatings, adhesives and textiles.


4. Methanol can be used to produce methyl formate. Methyl formate can be used to produce formic acid, formamide and other fine chemical products. It can also be used as insecticide, fungicide, fumigant, tobacco treatment agent and gasoline additive.


5. Methanol can also be used to produce methylamine, which is an important fatty amine. Taking liquid nitrogen and methanol as raw materials, it can be separated into monomethylamine, dimethylamine and trimethylamine through processing, which is one of the basic chemical raw materials.


6. It can be synthesized into dimethyl carbonate, which is an environmental protection product, which is used in medicine, agriculture and special industries.


7. It can be synthesized into ethylene glycol, which is one of petrochemical intermediate raw materials, and can be used to produce polyester and antifreeze.


8. It can be used to manufacture growth promoter. It can increase the yield of crops greatly, keep the branches and leaves fresh and tender, thrive and flourish, and will not wither in summer. It can greatly reduce the irrigation water, which is conducive to the growth of dryland crops.


9. Methanol protein can be synthesized. The methanol protein produced by microbial fermentation with methanol as raw material is called the second generation single cell protein. Compared with natural protein, it has higher nutritional value, crude protein content is much higher than fish meal and soybean, and contains rich amino acids, minerals and vitamins. It can replace fish meal, soybean, bone meal, meat and skimmed milk powder.


10. Methanol is used as cleaning and degreasing agent, MOS level is mainly used for discrete devices, medium and large scale integrated circuits, and bv - III is mainly used for VLSI process technology.


11. Used as analytical reagent, such as solvent, methylation reagent and chromatographic reagent. It is also used in organic synthesis.


In general, methanol is a better solvent than ethanol, which can dissolve many inorganic salts. It can also be blended with gasoline as an alternative fuel. Since 1980s, methanol has been used to produce gasoline octane number additive methyl tert butyl ether, methanol gasoline, methanol fuel, and methanol protein, which promotes the development of methanol production and market demand.


12. Methanol is not only an important chemical raw material, but also an excellent energy and vehicle fuel. MTBE (methyl tert butyl ether) is prepared by the reaction of methanol and isobutylene. It is a high octane number lead-free gasoline additive and can also be used as solvent. In addition, it can also produce olefins and propylene to solve the problem of resource shortage.


13. Methanol can be used to produce dimethyl ether, which is not only widely used in daily chemical industry, pharmacy, pesticide, dyestuff and coating, but also has the advantages of convenient cleaning, high cetane number, good dynamic performance and less pollution. Easy to pressurize for liquid, easy to store and other fuel properties. A new type of liquid fuel prepared by methanol and dimethyl ether in a certain proportion is called alcohol ether fuel. Its combustion efficiency and thermal efficiency are higher than that of LPG.


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