A kind of synthetic method of triisodecyl trimellitate
A technology for the synthesis of triisodecyl trimellitate and its synthesis method, which is applied in the field of synthesis of triisodecyl trimellitate, can solve problems such as dissolution, and achieve the effects of bright color, reduced acid value, and high ester content
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Embodiment 1
[0026] Put 121g of trimellitic anhydride into the esterification reaction kettle, then add 504g of 2-propyl-1-heptanol, and add 90g of mesitylene, heat up to 115°C to dissolve, then raise the temperature to 160°C to keep the liquid out for 50min, then add 1g Tetrabutyl titanate, finally heated up to 220°C and kept for 5 hours, and the esterification was completed when the acid value of the reaction solution to be detected was less than or equal to 0.1mgKOH / g;
[0027] Under the condition of 195°C, exhaust the remaining isodecyl alcohol in the reaction system under negative pressure vacuum, and the exhaust time is 2h;
[0028] Lower the temperature to 75°C, prepare a solution of 0.1g of sodium bicarbonate dissolved in 21g of water, add it to the reaction solution, and stir for 0.5h to destroy the unhydrolyzed catalyst in the reaction solution;
[0029] Then add 0.5g active soil, stir evenly for decolorization for 1.5h, then filter, and add a small amount of perlite as a filter ...
Embodiment 2
[0033] (1) Put 115g of trimellitic anhydride into an esterification reaction kettle, then add 465g of 2-propyl-1-heptanol, and add 65g of trimethylene, heat up to 140°C to dissolve, then heat up to 175°C to keep the liquid out for 15min, Then add 2g of tetrapropyl titanate, and finally raise the temperature to 215°C and keep it warm for 3h. When the acid value of the reaction solution to be detected is less than or equal to 0.1mgKOH / g, the esterification is completed;
[0034] (2) Under the condition of 200°C, exhaust the remaining isodecyl alcohol in the reaction system under negative pressure vacuum, and the exhaust time is 1.5h;
[0035] (3) Lower the temperature to 95° C., prepare a solution of 0.2 g of sodium bicarbonate dissolved in 32 g of water, add it to the reaction solution, and stir for 1 hour to destroy the unhydrolyzed catalyst in the reaction solution;
[0036] (4) Then add 1.5g activated alumina, stir evenly for decolorization for 2h, then add a small amount of...
Embodiment 3
[0039] (1) Put 109g of trimellitic anhydride into an esterification reaction kettle, then add 475g of 2-propyl-1-heptanol, and add 85g of xylene, heat up to 130°C to dissolve, then heat up to 165°C to keep the liquid out for 45min, then Add 1.5g of tetraisopropyl titanate, and finally raise the temperature to 205°C and keep it warm for 3.5h. When the acid value of the reaction solution to be detected is less than or equal to 0.1mgKOH / g, the esterification is completed;
[0040] (2) Under the condition of 195°C, exhaust the remaining isodecyl alcohol in the reaction system under negative pressure vacuum, and the exhaust time is 2.5h;
[0041] (3) Lower the temperature to 85°C, prepare a solution of 0.15 g of potassium bicarbonate dissolved in 35 g of water, add it to the reaction solution, and stir for 1.5 h to destroy the unhydrolyzed catalyst in the reaction solution.
[0042] (4) Then add 2g of activated carbon, uniformly stir and decolorize for 2h, then add a small amount o...
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Abstract
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