Pure glacial acetic acid, that is, anhydrous acetic acid, acetic acid is one of the important organic acids, organic compounds. It solidifies into ice at low temperatures and is often called glacial acetic acid. The freezing point is 16.6 ° C (62 ° F), and after solidification, it becomes a colorless crystal. Its aqueous solution is weakly acidic and highly corrosive, and it is strongly corrosive to metals. The steam has an irritating effect on the eyes and nose. So, what are the specific uses of glacial acetic acid in different industries?
First, glacial acetic acid industrial use
1. Used for synthetic dyes and inks.
2. In the food industry, it is used as acidity regulator, acidifier, pickling agent, flavor enhancer, spice and so on. It is also a good antimicrobial agent, mainly due to its ability to reduce the pH below the pH required for optimal microbial growth.
3. It is used in the rubber and plastics industry. It is used as a solvent and starting material for many important polymers (such as PVA, PET, etc.) in the rubber and plastics industry.
4. Used as a starting material for paint and adhesive ingredients.
5. Glacial acetic acid also plays a very important role in laundry, mainly in preventing the loss of color on clothes, has a strong removal of stains, and can neutralize pH, so glacial acetic acid is more popular in laundry. When using, it needs to be used according to certain instructions, and can not blindly use glacial acetic acid.
Second, glacial acetic acid chemical use
1. For the synthesis of cellulose acetate. Cellulose acetate is used in photographic film and textiles. Before the invention of cellulose acetate film, photographic film used to be made from nitrates and there were many safety concerns.
2. Used as a solvent for the synthesis of terephthalic acid. P-xylene is oxidized to terephthalic acid. Terephthalic acid is used in the synthesis of PET and is widely used in the manufacture of plastic bottles.
3. Widely used to synthesize esters by reacting with various alcohols. Acetate derivatives are widely used as food additives.
4. Used for synthesis of vinyl acetate monomer. The monomer can then be polymerized to form poly (vinyl acetate), also commonly known as PVA.
5. Used as solvent in many organic catalytic reactions.
6. Used as scale and rust remover. When acetic acid reacts with water, the scale hisses and bubbles disappear, breaking it down from the solid into a liquid that can be easily removed.
Post time: May-30-2024