Titanium-based catalyst for polyester and preparation process of titanium-based catalyst
A titanium-based catalyst and preparation technology, applied in the field of polyester synthesis technology, can solve problems such as side reactions, poor solubility, and unsatisfactory viscosity of polyester slices
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Embodiment 1
[0028] A kind of preparation method of titanium series catalyst for polyester, it comprises the steps:
[0029] 1) Glyceryl chlorinated acetone and triethyl phosphite in a molar ratio of 1:1 were stirred and reacted at 150 °C for 4 h under the protection of nitrogen to obtain a crude product, and then the crude product was cooled to room temperature and distilled to obtain the retained product A 1 ;
[0030] 2) Will retain product A 1 Dissolved in 20 mL of acetic acid-water mixed solution with a mass ratio of 7:3, then stirred and reacted at 40 °C for 9 h, then distilled off the acetic acid and water in the mixture under reduced pressure to obtain product B 1 ;
[0031]3) Dissolve tetrabutyl titanate in 30 mL of anhydrous cyclohexane, then add 1,3-propanediol and react at 80 °C for 1 h to obtain the crude product, which is distilled to obtain the retained product C 1 ; Wherein, the molar ratio of organic titanate and 1,3 propanediol is 1:1.25;
[0032] 4) will retain the p...
Embodiment 2
[0034] 1) Glyceryl chlorinated acetone and triethyl phosphite in a molar ratio of 1:5 were stirred and reacted at 105 °C for 7.5 h under the protection of nitrogen to obtain a crude product, then the crude product was cooled to room temperature and distilled to obtain the retained product A 2 ;
[0035] 2) Will retain product A 2 Dissolved in 20 mL of acetic acid-water mixed solution with a mass ratio of 7:3, then stirred and reacted at 60 °C for 3 h, then distilled off the acetic acid and water in the mixture under reduced pressure to obtain product B 2 ;
[0036] 3) Dissolve tetrabutyl titanate in 30 mL of anhydrous cyclohexane, then add ethylene glycol and react at 60 °C for 2 h to obtain a crude product, which is distilled to obtain the retained product C 2 ; Wherein, the molar ratio of organic titanate and ethylene glycol is 1:1.5;
[0037] 4) will retain the product C 2 Dissolve in 40 mL of anhydrous cyclohexane, then add product B 2 React at 40°C for 5 h to obtain ...
Embodiment 3
[0039] A kind of preparation method of titanium series catalyst for polyester, it comprises the steps:
[0040] 1) Chloroacetone glycidyl and triethyl phosphite in a molar ratio of 1:2.5 were stirred and reacted at 80 °C for 15 h under the protection of nitrogen to obtain a crude product, then the crude product was cooled to room temperature and distilled to obtain the retained product A 3 ;
[0041] 2) Will retain product A 3 Dissolved in 20 mL of acetic acid-water mixed solution with a mass ratio of 7:3, then stirred and reacted at 25 °C for 12 h, and then distilled off the acetic acid and water in the mixture under reduced pressure to obtain product B 3 ;
[0042] 3) Dissolve tetrabutyl titanate in 30 mL of anhydrous cyclohexane, then add 1,2-propanediol and react at 45 °C for 4 h to obtain a crude product, which is distilled to obtain the retained product C 3 ; Wherein, the molar ratio of organic titanate and 1,2-propylene glycol is 1:0.8;
[0043] 4) will retain the p...
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