Novel synthetic process of tris (2-propylheptyl) trimellitate
A technology of trimellitic acid tris and trimellitic anhydride, which is applied in the field of organic chemical synthesis and the synthesis of plasticizer trimellitic acid triester, and can solve the index of trimellitic acid tris(2-propylheptyl)ester The color number and resistivity are difficult to reach high-grade products, etc., to achieve the effects of reducing energy consumption, speeding up the reaction speed, and increasing the washing temperature
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[0015] Get 1920 kilograms of trimellitic anhydride, 3248 kilograms of heptanol, and 17.1 kilograms of isopropyl titanate for subsequent use; earlier, 1920 kilograms of trimellitic anhydride, 2900 kilograms of heptanol, and 13.7 kilograms of isopropyl titanate are put into the reaction kettle, and the temperature rises. React at 180-190°C; after 2 hours of reaction, continue to heat up to 210°C, add the remaining 348 kg of heptanol and 3.4 kg of isopropyl titanate until the end of the reaction; add 52 kg of activated carbon and 51.9 kg of hydrogen peroxide was decolorized, and the crude product was obtained after decolorization; the crude product was neutralized and washed, and the temperature of the washing was controlled at 105° C., dealcoholized after washing, and filtered to obtain the finished product tris(2-propylheptyl) trimellitate.
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