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[Chemical Knowledge]：Properties and Uses of Purified Terephthalic Acid

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Purified terephthalic acid (PTA) is an important organic chemical raw material, which is widely used in the fields of polyester fiber, polyester film and polyester bottle. This article will detail the properties and uses of purified terephthalic acid.

1. nature of purified terephthalic acid

1. physical properties of
purified terephthalic acid is white crystalline powder, tasteless, non-toxic. It is insoluble in water, but soluble in hot acetic acid, formic acid and other organic solvents. The melting point of purified terephthalic acid is 425 ℃ and the boiling point is 370 ℃.

2. chemical properties
purified terephthalic acid has the chemical properties of carboxyl group, can react with alcohols to generate ester, can also react with alkali to generate salt. In addition, it can also undergo a polycondensation reaction to produce a polyester-based polymer compound.

2. Purified Terephthalic Acid Use

1. Polyester Fiber
Purified Terephthalic Acid is the main raw material for the production of polyester fiber (polyester). Polyester is a synthetic fiber with good wrinkle resistance, shape retention and elasticity, and is widely used in clothing, home textiles and industrial textiles.

2. polyester film
purified terephthalic acid can also be used in the production of polyester film. Polyester film has excellent mechanical properties, electrical insulation properties and chemical resistance, and can be used in packaging, electronic appliances, aerospace and other fields.

3. polyester bottle
purified terephthalic acid can also be used in the production of polyester bottles. Polyester bottles have the advantages of light weight, not easy to break, high transparency, and are widely used in packaging food, beverages and pharmaceuticals.

In short, as an important organic chemical raw material, purified terephthalic acid has a wide range of uses in the field of chemical production raw materials.

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