Main purposes
1. GB 2760-1996 stipulates that the edible spices are allowed to be used. It can be used in small amounts in magnolia, ylang-ylang, osmanthus, rabbit ear flowers, toilet water, fruity fragrances and other flavors to enhance the fresh fruity aroma. It is especially used in perfume flavors to have a rounding effect. Suitable for edible flavors such as cherries, peaches, apricots, grapes, strawberries, raspberries, bananas, pears, pineapples, lemons, and melons. Wine flavors such as brandy, whiskey, rum, rice wine, white wine, etc. are also used.
2. Ethyl acetate is one of the most widely used fatty acid esters. It is a quick-drying solvent with excellent solubility. It is an excellent industrial solvent and can also be used for column chromatography. of eluent. It can be used for nitrocellulose, ethylcellulose, chlorinated rubber and vinyl, cellulose acetate, cellulose butyl acetate and synthetic rubber. It can also be used for liquid nitrocellulose ink for copy machines. It can be used as a solvent for adhesives and a thinner for spray paint. Ethyl acetate is an efficient solvent for many types of resins and is widely used in the production of inks and artificial leather. Used as analytical reagents, chromatographic analysis standard materials and solvents.
3. It can be used as a cleaning agent in the textile industry, as a flavor extraction agent for special modified alcohol in the food industry, and as an extraction agent for pharmaceutical processes and organic acids. Ethyl acetate is also a raw material for the manufacture of dyes, drugs and fragrances.
3. Determination of bismuth, gold, iron, mercury, oxidants and platinum.
4. Used as a standard material for calibrating thermometers when separating sugars.
5. Biochemical research, protein sequence analysis.
6. Environmental protection and pesticide residue analysis.
Ethyl acetate, a compound, has a chemical formula of C4H8O2 and a molecular weight of 88.11. Also known as ethyl acetate, it is an ester with the functional group -COOR (a double bond between carbon and oxygen). It can undergo alcoholysis, ammonolysis, transesterification, reduction and other common ester synergistic reactions. It has low toxicity, sweet taste, pungent odor when the concentration is high, easy to volatilize, excellent solubility, quick drying, and wide range of uses. It is an important organic chemical raw material and industrial solvent. It is a first-class flammable product and should be stored in a low-temperature and ventilated place, away from fire sources.
Laboratories generally produce it through the esterification reaction of acetic acid and ethanol. Esterification reaction is a reversible reaction. In order to increase the yield of ester, the reaction must be carried out in a direction that is conducive to the formation of ester. Generally, an excess of one of the reactants acid and alcohol is used. In industrial production, which kind of excess is better generally depends on the specific circumstances such as whether the raw materials are easy to obtain, whether the price is cheap, and whether they are easy to recycle. In the laboratory, the method of excess ethanol is generally used. The mass fraction of ethanol should be high. If absolute ethanol can be used instead of ethanol with a mass fraction of 95, the effect will be better. The amount of concentrated sulfuric acid used for catalysis is very small. Generally, the catalysis can be completed as long as the mass of sulfuric acid reaches 3 times the mass of ethanol. However, in order to remove the water generated during the reaction, the amount of concentrated sulfuric acid should be slightly more.
The reaction temperature should not be too high when preparing ethyl acetate. Keep it between 60°C and 70°C. Impurities such as ether, sulfurous acid or ethylene will be produced when the temperature is too high. After the liquid is heated to boiling, it should be heated over low heat. A few pieces of broken porcelain can be added to the test tube in advance to prevent the liquid from boiling.