Titanium catalyst as well as preparation method and application thereof
A titanium-based catalyst and catalyst technology are applied in the field of titanium-based catalysts and polyester-based titanium-based catalysts, which can solve the problems of excessive size and particle impurities in polyester chips, and achieve small particle size, low particle impurity content, and good technology. effect of effect
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Embodiment 1
[0068] 40g of ethylene glycol was added to a 100mL three-mouth flask equipped with a stirrer, condenser and thermometer, and 2.84g of tetraisopropyl titanate was slowly dripped into the three-mouth flask, and the white turbid solution was obtained by stirring for several hours. After adding magnesium tetrahydrate magnesium acetate 2.14g and anhydrous sodium acetate 0.16g to the above solution, stirring for about 0.5h to obtain a clear and transparent solution, heated to 80 ° C. Stir for about 3 hours to get a white pellet. The above solution was filtered, washed with water, and then dried to obtain a solid powder titanium catalyst, which was tested by ICP, and the titanium content in the solid powder was 20.3wt%. The powder is microscopic as such Figure 1 as shown.
[0069] 500g of terephthalic acid, 316g of ethylene glycol, the above catalyst (based on the amount of polyester generated, the weight of titanium atoms is 5ppm) and trimethyl phosphate (based on the amount of polyest...
Embodiment 2
[0072] 40g of ethylene glycol was added to a 100mL three-mouth flask equipped with a stirrer, condenser and thermometer, and 2.84g of tetraisopropyl titanate was slowly dripped into the three-mouth flask, and the white turbid solution was obtained by stirring for several hours. After adding magnesium tetrahydrate magnesium acetate 1.07g and sodium anhydrous acetate 0.16g to the above solution, stirring for about 0.5h to obtain a clear and transparent solution, heated to 80 ° C. Stir for about 3 hours to get a white pellet. The above solution was filtered, washed with water, and then dried to obtain a solid powder titanium catalyst, which was tested by ICP, and the titanium content in the solid powder was 22.5wt%.
[0073] 500g of terephthalic acid, 316g of ethylene glycol, the above catalyst (based on the amount of polyester generated, the weight of titanium atoms is 5ppm) and trimethyl phosphate (based on the amount of polyester generated, the weight of the phosphorus atom is 20ppm...
Embodiment 3
[0076] 40g of ethylene glycol was added to a 100mL three-mouth flask equipped with a stirrer, condenser and thermometer, and 2.84g of tetraisopropyl titanate was slowly dripped into the three-mouth flask, and the white turbid solution was obtained by stirring for several hours. After adding magnesium tetrahydrate 5.35g and sodium anhydrous acetate 0.16g to the above solution, stirring for about 0.5h to obtain a clear and transparent solution, heated to 80 ° C. Stir for about 3 hours to get a white pellet. The above solution was filtered, washed with water, and then dried to obtain a solid powder titanium catalyst, which was tested by ICP and contained 18.2wt% of titanium in the solid powder.
[0077] 500g of terephthalic acid, 316g of ethylene glycol, the above catalyst (based on the amount of polyester generated, the weight of titanium atoms is 5ppm) and trimethyl phosphate (based on the amount of polyester generated, the weight of the phosphorus atom is 20ppm), mixed into a slur...
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