What is the use of o-xylene in plastics?
CAS 95-47-6 o-Xylene Chemical is an aromatic hydrocarbon widely utilized in the chemical industry. Serving as a core raw material within the plastics sector, o-xylene is primarily employed in the production of phthalic anhydride (PA)-an indispensable intermediate in the manufacturing of plastics.
Primary Use of o-Xylene (Plasticizers):
Over 80% of o-xylene is used to produce phthalic anhydride, which is converted into plasticizers that make rigid PVC soft and flexible.
PA Phthalic anhydride is a critical intermediate used to manufacture:
- Plasticizers (especially phthalate plasticizers)
- PVC compounds
- Unsaturated polyester resins
- Alkyd resins
The specific applications of ortho-xylene within the plastics industry are explained as follows:
1. Raw Material for Phthalic Anhydride (PA) Production
O-xylene (CAS 95-47-6) serves primarily as a petrochemical feedstock for the production of phthalic anhydride (PA) via a catalytic oxidation process. In this process, the two methyl groups situated on the aromatic ring undergo a selective oxidation reaction under controlled industrial conditions.
2. Key Intermediate in Aromatic Oxidation Processes
In the field of industrial organic chemistry, o-xylene, as an ortho-substituted aromatic hydrocarbon, is very suitable for gas-phase catalytic oxidation reactions in large-scale phthalic anhydride production.
3. Upstream Feedstock for Plasticizers
Globally, over 80% of o-xylene is utilized in the production of phthalic anhydride; subsequently, this phthalic anhydride undergoes esterification reactions with alcohols to yield phthalate plasticizers. These plasticizers are essential additives, used primarily to enhance the flexibility of polyvinyl chloride (PVC) materials.
4. Industrial Process Chain in Plastics Manufacturing
The typical production pathway can be summarized as follows:
O-xylene → Catalytic Oxidation → Phthalic Anhydride (PA) → Esterification → Plasticizers → Flexible PVC Products
5. Role in the Polymer Industry (Indirect Application)
Ortho xylene itself is not directly incorporated as a component into the final plastic products. Its value lies in enabling downstream chemical transformations that alter the mechanical properties of polymers-such as flexibility, softness, and processability.
6. Applications in Resin and Chemical Manufacturing
Phenylic anhydride, produced from o-xylene, has downstream derivatives that are widely used in the production of unsaturated polyester resins, alkyd resins, coatings, and plastic modification systems; these products are used in industries such as construction, automotive, and packaging.
Summary
O-Xylene (ortho-xylene) plays a crucial role in the plastics industry as a core chemical intermediate and solvent, especially in the production of plasticizers, PVC materials, and polyester resins. While it is not a finished plastic, its downstream products are essential to modern plastic manufacturing.
Why o-Xylene is Used in the Plastics Industry
o-Xylene (CAS 95-47-6) is used in the plastics industry because of its ortho-substituted aromatic structure, which allows both methyl groups to undergo catalytic oxidation under industrial conditions.
1. Oxidation reactivity
Ortho xylene can be converted in the presence of air and a vanadium-based catalyst into phthalic anhydride (PA), a key chemical intermediate.
2. Defined industrial pathway
The main reaction route is stable and widely used:
o-Xylene → Phthalic anhydride → Phthalate esters → Plasticizers
3. Role in plastics industry
Phthalic anhydride derivatives are used to produce plasticizers for PVC, which adjust flexibility and processing performance.
Technical Properties
| Property | Value / Description |
|---|---|
| Chemical Name | o-Xylene (Ortho-xylene) |
| CAS Number | 95-47-6 |
| Molecular Formula | C₈H₁₀ |
| Molecular Weight | 106.16 g/mol |
| Appearance | Colorless transparent liquid |
| Odor | Aromatic odor |
| Density | ~0.88 g/cm³ (20°C) |
| Boiling Point | ~144–145°C |
| Melting Point | ~-25°C |
| Flash Point | ~29°C (closed cup) |
| Solubility in Water | Insoluble |
| Vapor Pressure | Moderate (volatile organic compound) |
| Chemical Type | Aromatic hydrocarbon (xylene isomer) |
| Main Industrial Reaction | Catalytic oxidation to phthalic anhydride |
| Storage Condition | Cool, dry, well-ventilated area, away from ignition sources |
FAQ
1. What are the primary industrial applications of Ortho-xylene (CAS 95-47-6)?
It is primarily used as a feedstock for the production of phthalic anhydride, which serves as an intermediate in the manufacturing of plasticizers and resins.
2. Is o-xylene used directly in plastic production?
No. Ortho-xylene is not used directly as a plastic material itself. It is first converted into phthalic anhydride, which is subsequently transformed into downstream plasticizer products.
3. Why is 1,2-dimethylbenzene used in PVC manufacturing?
Because its derivative: phthalic anhydride, is used to produce plasticizers; these plasticizers enhance the flexibility and processing properties of PVC materials.
4. What are the key structural characteristics of ortho-xylene?
It is an ortho-substituted aromatic hydrocarbon featuring two adjacent methyl groups attached to its benzene ring; this structural feature influences the characteristics of its oxidation reactions.
5. Which industries utilize derivatives of o-xylene CAS 95-47-6?
Derivatives produced from o-xylol are primarily utilized in the manufacturing sectors of plastics (specifically PVC plasticizers), coatings, unsaturated polyester resins, and alkyd resins.
6. Is o-xylene chemical soluble in water?
No. Ortho-xylene is insoluble in water, but it is soluble in most organic solvents.
7. What is the difference between o-xylene and other xylene isomers?
o-Xylene has two adjacent methyl groups, which allows it to form phthalic anhydride directly through oxidation, while m-xylene and p-xylene produce different intermediates.
8. Can o-xylene be used as a solvent in industrial applications?
Yes. o-xylene can be used as a high-boiling aromatic solvent in some resin processing and cleaning applications, but its main use is as a chemical intermediate.
9. What safety considerations are required when handling it?
CAS 95-47-6 o-Xylene liquid is a flammable liquid and should be stored in sealed containers, away from heat and ignition sources, with proper ventilation during handling.
about us
Gneebio is a chemical supplier with partnerships with numerous manufacturing plants. The company specializes in supplying aromatics, solvents, and chemical intermediates, which have wide applications in downstream industries.
We focus on providing a stable bulk supply, consistent product specifications, and complete technical documentation, including COA, SDS, and TDS, to support industrial procurement and compliance requirements in international trade.
Gneebio Product Packaging
Customer Visit
