Product Details
CasNo： 100-21-0
MF： C8H6O4
Appearance： White crystal or powder
Delivery Time： 15 days
Packing： 25kg/bag
Purity： 99%
- Basic Information
- Chinese Name: Purified Terephthalic Acid, abbreviated as PTA
- English Name: Purified Terephthalic Acid; P - Phthalic Acid
- Chemical Formula: C₈H₆O₄ or C₆H₄(COOH)₂
- CAS Number: 100 - 21 - 3 (crude product), 546 - 67 - 8 (purified product)
- Physical and Chemical Properties
- Appearance: White crystal or powder
- Odor: Almost odorless
- Density: 1.522 - 1.55g/cm³
- Melting Point: 300 - 303℃ (decomposition temperature)
- Solubility: Slightly soluble in cold water, slightly soluble in hot ethanol, can be well - dissolved in hot water and organic solvents such as ethanol, acetone and other polar solvents, soluble in alkaline solutions, insoluble in water, ether, glacial acetic acid and chloroform.
- Acidity and Alkalinity: It is a weak acid, which is partially ionized in water, showing certain acidity.
- Flammability: Low - toxicity and flammable. If mixed with air, it will burn or even explode when encountering fire within a certain limit.
- Auto - ignition Temperature: 680℃, Ignition Point: 384 - 421℃
- Production Methods
- Oxidation Method: The most common industrial production method is to start from p - xylene (PX), use acetic acid as a solvent, and oxidize it with air to form crude terephthalic acid under the action of a catalyst. Then, the crude terephthalic acid is successively crystallized, filtered and dried to obtain the crude product. The crude terephthalic acid is hydrogenated to remove impurities, and then crystallized, centrifugally separated and dried to obtain the PTA finished product.
- Other Methods: Potassium benzoate or potassium phthalate can also be used to produce terephthalic acid through a rearrangement reaction in the presence of a cadmium or zinc catalyst and carbon dioxide.
- Uses
- Polyester Fiber Field: It is the main raw material for producing polyester fiber (polyester). Polyester can be used to make special materials such as bullet - proof vests, seat belts, tire cords, fishing nets, ropes, filter cloths and insulating materials. However, its main use is as a textile raw material. Polyester filament is used by textile enterprises to produce chemical fiber fabrics, and polyester staple fiber is generally blended with cotton.
- Polyester Bottle Chip Field: It is used to produce bottle - grade polyester, which is mainly applied to the packaging of various beverages, especially carbonated beverages, and can also be used for packaging containers of medicines, cosmetics, etc.
- Polyester Film Field: It is used to produce film - grade polyester, which is mainly applied to packaging materials, films and tapes, and can also be used in insulating materials, capacitor films, etc. in the electronic and electrical industry, as well as in the field of solar cell backsheets.
- Other Fields: It can also be made into engineering polyester plastics for auto parts, electronic equipment casings, etc.; it can also be used as the raw material for plasticizers and dye intermediates, and can also be used to manufacture herbicides and adhesives.
- Packaging and Storage
- Packaging: The bag - packed products use packaging bags lined with plastic films. The net weight of each bag of products is usually 1000±2kg, and there are also other specifications such as 25kg/bag. The packaging bag should be printed with the name and address of the manufacturer, trademark, product name, grade, batch number, net weight and standard code. Stainless steel tank cars can also be used for transportation.
- Storage: It should be stored in a cool, ventilated and dry warehouse, away from fire sources and heat sources, to prevent dust from flying, and avoid contact with oxidants, alkalis and other substances.
