Ethyl acetate, also known as ethyl acetate, has low toxicity, sweet taste, pungent odor at higher concentrations, and volatile. It is a fine chemical product with a wide range of uses. It has excellent solubility, quick-drying, and has a wide range of uses. It is an important organic chemical raw material and industrial solvent.
Ethyl acetate is sensitive to air, absorbs water and slowly hydrolyzes and becomes acidic. Ethyl acetate soluble in water (10%ml/ml); can be miscible with chloroform, ethanol, acetone and ether; can dissolve some metal salts (such as lithium chloride, cobalt chloride, zinc chloride, iron chloride, etc.) )reaction.
Use
1. As an industrial solvent, used in coatings, adhesives, ethyl cellulose, artificial leather, linoleum colorants, artificial fibers and other products.
2. As an adhesive, used in the production of printing inks and artificial pearls.
3. As an extractant, it is used in the production of medicines, organic acids and other products.
4. As a spice raw material, it is used as the main raw material for pineapple, banana, strawberry and other fruit flavors and whiskey, cream and other spices. Spice manufacturing, can be used as spices and artificial flavors for liquor blending.
5. Extracting agent, which extracts many compounds (phosphorus, tungsten, arsenic, cobalt) from the aqueous solution.
6. Organic solvents. When separating sugars, it is used as a standard substance for calibrating thermometers.
7. Verification of bismuth, gold, iron, mercury, oxidants and platinum.
8. Determination of bismuth, boron, gold, iron, molybdenum, platinum, potassium and thallium.
9. Biochemical research, protein sequence analysis.
10. Analysis of environmental protection and pesticide residues.
11. Organic synthesis.
12. It is a quick-drying solvent for nitrocellulose, ethyl cellulose, cellulose acetate and chloroprene rubber, and also a low-toxic solvent used in industry.
13. It can also be used as a cleaning agent in the textile industry and an extractant for natural fragrances. It is also an important raw material for the pharmaceutical industry and organic synthesis.
14. GB 2760-96 stipulates that it is permitted to use edible spices. Mainly used for aroma, persimmon de-astringency, making spice granules or tablets, and vinegar ingredients. It is widely used in the preparation of fruit flavors such as cherries, peaches, apricots, and wine flavors such as brandy.
Notes
1. The esterification reaction is a reversible reaction. In order to increase the yield of esters, the reaction must be made as far as possible to facilitate the formation of esters. Generally, one of the reactants acid and alcohol is made in excess. In industrial production, which kind of excess is better, generally depends on whether the raw materials are easily available, whether the price is cheap, and whether it is easy to recycle. In the laboratory, the method of excessive ethanol is generally used. The mass fraction of ethanol should be high, and the effect would be better if the ethanol with a mass fraction of 95% could be replaced by anhydrous ethanol. The amount of concentrated sulfuric acid used in the catalysis is very small. Generally, the catalysis can be completed as long as the quality of sulfuric acid reaches 3% of the mass of ethanol. However, in order to remove the water generated in the reaction, the amount of concentrated sulfuric acid should be increased slightly.
2. The reaction temperature should not be too high when preparing ethyl acetate. Keep it between 60°C and 70°C. When the temperature is too high, impurities such as ether, sulfurous acid or ethylene will be produced. After the liquid is heated to boiling, it should be heated with a small fire. Several pieces of broken porcelain can be added to the test tube in advance to prevent the liquid from bumping.
3. Do not extend the air duct into the Na2CO3 solution to prevent the Na2CO3 solution from being poured into the test tube of the heated reactant due to uneven heating. In addition, ethanol and acetic acid are easily soluble in water, which can cause back suction.
Safety matters
Hazardous characteristics
Flammable, its vapor and air can form an explosive mixture. Exposure to open flames and high heat can cause combustion and explosion. It will react violently on contact with oxidants. In the fire scene, the heated container is at risk of explosion. Its vapor is heavier than air and can spread to a considerable distance in a lower place, and it will cause back-combustion when it encounters an open flame.
Combustion (decomposition) products: carbon monoxide, carbon dioxide.
On-site emergency monitoring method: gas detection tube method
Laboratory monitoring method: Pump-less sampling gas chromatography (WS/T155-1999, workplace air)
Steam may cause drowsiness and dizziness. Prolonged contact may cause dry and cracked skin.
Storage and transportation
1. This product is a first-class flammable product and should be stored in a low-temperature ventilated place, away from fire sources.
2. Take measures to prevent the occurrence of static electricity. When loading and unloading, please load and unload with care to prevent damage to packaging and containers, and to prevent static electricity from accumulating.
3. The product should be stored in a cool, ventilated warehouse. The temperature of the warehouse should not exceed 30°C to prevent direct sunlight and keep the container tightly closed. It should be stored separately from oxidants, acids and alkalis, and the storage area should be equipped with leakage emergency equipment and suitable storage materials.
4. The workplace should be ventilated, and operators should wear protective equipment.
Urgent treatment
Inhalation: quickly leave the scene to fresh air. Keep the airway unobstructed. If breathing is difficult, give oxygen. If breathing stops, give artificial respiration immediately. Seek medical attention.
Ingestion: Drink enough warm water, induce vomiting, and seek medical attention.
Skin contact: Take off contaminated clothing and wash skin thoroughly with soap and water.
Eye contact: Lift the eyelid and rinse with running water or normal saline. Seek medical attention.
Extinguishing agent: alcohol-resistant foam, carbon dioxide, dry powder, sandy soil. Extinguishing with water is ineffective.
Precautions for fire extinguishing: Water can be used to keep the container in the fire scene cool.
Leak handling
Leakage emergency treatment quickly evacuate personnel from the leaked contaminated area to a safe area, and isolate them, strictly restrict access. Cut off the fire source. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and fire protective clothing. Cut off the source of leakage as much as possible to prevent entry into restricted spaces such as sewers and flood drains.
Small leakage: Use activated carbon or other inert materials to absorb. It can also be washed with a large amount of water, and the washing water is diluted and put into the waste water system.
A large number of leaks: construct dikes or dig pits for storage; cover with foam to reduce steam disasters. Use explosion-proof pump to transfer to tank truck or special collector, recycle or transport to waste disposal site for disposal.
Compatibility taboo
Ethyl acetate reacts violently with strong oxidants, strong bases, strong acids and nitrates, which can cause fire or explosion. This product also reacts violently with chlorosulfonic acid, lithium aluminum hydride, 2-chloromethylfuran, and tetrabutylammonium hydroxide.
Alarm detection
The combustible gas concentration alarm is used to detect the leakage of combustible gas. When there is a flammable gas leak in the industrial environment, when the flammable gas concentration alarm detects that the gas concentration reaches the critical point of explosion, the flammable gas concentration alarm will send out an alarm signal to remind the on-site staff to take safety measures and drive the exhaust , Cut off and spray system to prevent explosion, fire, and poisoning accidents, so as to ensure safe production.
Safety Instructions
Chemical Safety Data Sheet (MSDS)
Ethyl acetate is non-toxic.
Health hazards: Irritating to eyes, nose and throat. High concentration inhalation can induce progressive anesthesia, acute pulmonary edema, liver and kidney damage. Continuous inhalation of large amounts can cause respiratory paralysis. People who take it by mistake can produce nausea, vomiting, abdominal pain, diarrhea and so on. It has a sensitizing effect, causing bleeding of the gums due to vascular and nerve disorders; it can cause eczema-like dermatitis. Chronic effects: Long-term exposure to this product can sometimes cause corneal opacity, secondary anemia, and leukocytosis.
Explosion hazard: This product is flammable, irritating, and sensitizing.
Hazardous characteristics: It is flammable, and its vapor and air can form an explosive mixture, which can cause combustion and explosion when exposed to open flames and high heat energy. It reacts violently on contact with oxidants. Its vapor is heavier than air and can spread to a considerable distance at a lower place, and will ignite when it encounters a fire source.
