Adiponitrile (ADN), also known as 1,4-dicyanobutane, is a colorless and transparent oily liquid with a slightly bitter taste. Soluble in methanol, ethanol, chloroform. Insoluble in water, cyclohexane, ether, carbon disulfide and carbon tetrachloride.
Adiponitrile is an organic compound having the molecular formula (CH2)4(CN)2 and is a precursor of an important polymer nylon 66. In 2005, its production could reach 100 million kilograms. About 90% of the world’s annual production of adiponitrile is used in the production of nylon 66 salts.
At present, the methods for producing adiponitrile in industry are mainly adipic acid ammoniation method, butadiene method and acrylonitrile dimerization method. Among them, butadiene hydrogenation to produce adiponitrile has the advantages of easy availability of raw materials, low energy consumption, It has the advantages of low cost, short process flow, large-scale production, high yield, high product quality, and low environmental pollution. It is the most advanced adiponitrile production process in the world.
Adiponitrile is an important organic chemical intermediate. It is mainly used as the precursor for the production of polyhexamethylene adipamide (nylon 66), 1,6-hexamethylene diisocyanate (HDI) and nylon 610. At the same time, it is also used in the fields of electronics, light industry and organic synthesis. . According to statistics, about 90% of adiponitrile in the world is used in the production of nylon 66 every year, and its cost accounts for about 40% to 50% of nylon 66.
Adiponitrile is an important raw material for making nylon 66. Nylon 66 has excellent comprehensive properties and can be widely used in textile, machinery, instrumentation, automobile, rail transit, electrical and electronic industries. Nylon 66 is especially suitable for the military industry due to its excellent heat resistance and special performance of strong impact resistance.
Adiponitrile is mainly used in the production of polyamide fiber intermediate hexamethylene diamine, rubber accelerator and rust inhibitor, etc., also used as detergent additive, terpolymerization of acrylonitrile, methacrylonitrile and methyl methacrylate Spinning solvent for polyvinyl chloride fibers, solvent for wet and dry spinning of polyvinyl chloride fibers, colorant for polyamides, auxiliaries for fabric bleaches, acetate, propionate, butyrate and mixed ester plasticizers; and as aromatic Extracted extractants, etc.
The hydrogenation reduction of adiponitrile to form hexamethylene diamine, and the photochemical reaction of hexamethylene diamine to generate HDI (1,6-hexamethylene diisocyanate) is another important application for the development of the downstream product chain of adiponitrile. The neutralization reaction of hexamethylene diamine and adipic acid produces nylon 66 salt, which is the most important industrial use developed so far for adiponitrile.
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