DOP is one of the most effective plasticizers in terms of plasticizing performance, while also being cost-effective. Therefore, DOP (Dioctyl Phthalate) is a most used plasticizer“. BASTONE is the leading DOP Producer in china
DOP Production Process
DOP Producer continuous prodution process
Phthalic anhydride reacts with 2-ethylhexanol in a molar ratio of 1:1.6 at 120°C for monoesterification. The reaction proceeds continuously into a diesterification reactor.
At 130–150°C and 7.9 kPa, with sulfuric acid catalyst (0.5% of total feed), the reaction continues to form the diester (DOP).
The crude ester product is first washed with water at 50°C using 1/5 of the total volume, followed by neutralization with 2%–3% sulfuric acid at 60–70°C. Then, it is further neutralized at a 1:1 ratio with water at 70–80°C, followed by a final hot water wash.
Then, 0.1% activated carbon is added and the mixture is deacidified and decolored at 150°C and 3.9 kPa under vacuum. Finally, the product is filtered to obtain purified DOP.
Specification
| Appearance | Transparent oily liquid |
|---|---|
| Chroma | ≤30 |
| Purity | ≥99.5% |
| Density(20℃) | 0.982-0.988 g/cm3 |
| Flash Point | ≥196℃ |
| Acidity | ≤0.030% |
| Water | ≤0.10% |
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