Ethyl acetate;Acetic acid
CAS : 141-78-6
formula : C4H8O2
molecular weight : 88.10
boiling point : 75-77.5 ° C
melting point : -83.5-84 ° C
Chinese name : ethyl acetate; ethyl acetate;
English title : Ethyl acetate; Acetic acid, ethyl ester; acetic ether
traits Description : colorless; the fruit flavor with flammable liquid. -83.6 ° C melting point, boiling point of 77.1 ° C and relative density of 0.9003, 1.3723 refractive index, the flash point (open cup) 4 ° C, the vapor pressure (20 ° C) 9.4kPa, vaporization heat 366.5J / g, heat capacity 1.92J / (g ° C). Explosion limits neonatal tetanus% 2.13% (volume).
with ether; Alcohol; Halohydrocarbon; Aromatics other immiscible organic solvent slightly soluble in water, 25 ° C 10ml water soluble 1ml the goods, a rise in temperature is lower solubility, water and ethyl alcohol are instantly formed 2 yuan azeotropic mixture.
water generated by azeotropic mixture to the boiling point of 70.4 ° C, 6.1% moisture content (weight)
and ethanol formation azeotropic mixture the boiling point of 71.8 ° C; also water and 7.8% and 9.0% ethanol azeotropic formation of ternary mixtures, the boiling point of 70.2 ° C and volatile. Moisture can make it slow decomposition acidic reaction.
production methods : 1. France is the direct esterification domestic industrial production of ethyl acetate on the main line. Acetate and raw materials for ethanol, sulfuric acid as the catalyst in direct esterification ethyl acetate, then dehydration, fractionation in refined products.
2. Acetaldehyde legitimate reduction in aluminum alkyl catalyst for condensation of acetaldehyde formed by reaction of ethyl acetate. Most foreign industrial production use of this technology.
3. Vinyl acetate direct esterification with the formation of ethyl acetate. Ethyl also be acid; Acetic anhydride or diketene and ethanol were obtained by the reaction; Also in the aluminum catalytic ethanol, acetaldehyde by the two molecules produced by the reaction.
In addition, the industry from acid oxidation of butane also vice - ethyl acetate.
purposes : ethyl acetate is the most widely applied one of the fatty acid ester, is a fast-drying solvent, the solution has excellent ability is excellent industrial solvents. For nitrocellulose, ethyl cellulose, rubber and vinyl chloride resin, acetate cellulose ester, butyl acetate cellulose and synthetic rubber, and can also be used with liquid nitro copier ink fibers.
bonding agent for the solvents, paint thinner, in the textile industry can be used as a cleaning agent,
the food industry can be modified as a special flavor of alcohol extraction agent , but also for the pharmaceutical and organic acids in the process of extraction agent.
the spice industry is an important spice additives for Flavoring agent components.