Preparation method of sucrose polyether with high degree of functionality
A high-functionality, sucrose technology, applied in the field of preparation of polyether polyols, can solve the problems of sucrose conversion rate, large residual sucrose monomer, etc., and achieve the effects of good dimensional stability, improved functionality, and reduced cost
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Embodiment 1
[0024] Put 1102g of sucrose (solid), 342g of diethylene glycol, and 6g of sodium hydroxide into a 5L 1# reactor, replace with nitrogen 10 times, and stir when the temperature rises to 80°C to fully fuse the initiator for 1.5h. Vacuum at -0.09MPa, when the temperature is gradually raised to 90°C, 50g of propylene oxide is used for pre-dropping, and when the temperature is continued to rise to 110°C, 2506g of propylene oxide is used for reaction, the reaction pressure is 0.25MPa, and the reaction time is 7h. After the reaction, mature for 3 hours, turn on vacuum and open bubbling to remove the monomer for 2 hours to obtain a reaction solution.
[0025] Most of this reaction solution is discharged into the 2# kettle for aftertreatment, and 500g of the reaction solution remains in the 1# kettle as one of the initiators of the second batch of reactions.
[0026] The 2# kettle was neutralized with phosphoric acid to make the pH = 5.2, 1.0g of magnesium silicate was added, the temper...
Embodiment 2
[0030] Put 954g of sucrose (solid), 327g of glycerin, and 6g of potassium hydroxide into a 5L 1# reactor, replace with nitrogen 10 times, and stir when the temperature rises to 90°C to fully fuse the initiator for 1.5h. Vacuum at -0.09MPa, when the temperature is gradually raised to 95°C, 50g of propylene oxide is used for pre-dropping, and when the temperature is continued to rise to 120°C, 2670g of propylene oxide is used for reaction, the reaction pressure is 0.3MPa, and the reaction time is 6h. After the reaction, mature for 3 hours, turn on vacuum and open bubbling to remove the monomer for 2 hours to obtain a reaction solution.
[0031] Most of this reaction solution is discharged into the 2# kettle for aftertreatment, and 500g of the reaction solution remains in the 1# kettle as one of the initiators of the second batch of reactions.
[0032] The 2# tank was neutralized with phosphoric acid to make the pH = 5.0, 1.2g of magnesium silicate was added, the temperature was ...
Embodiment 3
[0036] Put 1127g of sucrose (solid) and 234g of propylene glycol into a 5L 1# reactor, replace with nitrogen 10 times, suck in 32g of dimethylamine under negative pressure, and stir when the temperature rises to 80°C to fully fuse the initiator for 1 hour. When the temperature is gradually raised to 80°C, 50g of propylene oxide is used for pre-dropping. When the temperature continues to rise to 95°C, 1290g of propylene oxide is used for the reaction. The reaction pressure is 0.3MPa. , Reaction pressure 0.3MPa, reaction time 9h. After the reaction, mature for 3 hours, turn on vacuum and open bubbling to remove the monomer for 2 hours to obtain a reaction solution.
[0037] Most of this reaction solution is discharged into the 2# kettle for aftertreatment, and 500g of the reaction solution remains in the 1# kettle as one of the initiators of the second batch of reactions.
[0038] The 2# tank was neutralized with oxalic acid to make the pH=5.4, 1.1g of magnesium silicate was ad...
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