Preparation method of coalescing agent alcohol ester-12
A technology of dodecyl alcohol esters and film-forming additives, which is applied in the field of chemical additives, can solve the problems of using toxic substances, low yield, complicated process, etc., and achieves reaction process control, easy reaction process, and high product selectivity Effect
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Embodiment 1
[0013] Under normal pressure and room temperature conditions (25°C±2°C), in a 500ml three-neck flask equipped with a reflux condenser and a stirring device, (1) add 100.00g of isobutyraldehyde and keep stirring, and then slowly pour into the flask A total of 0.72 g of NaOH solid particles was added to the reaction solution. At this time, the reaction solution began to reflux, and the temperature rose to 69° C. at the highest. (2) When the reflux of the reaction system is significantly reduced and the temperature drops to 25°C, continue to add 100.00g of isobutyraldehyde to the flask, and slowly add 0.72g of NaOH particles in total, and the temperature of the reaction solution rises to 61°C. (3) When the reflux of the reaction solution is significantly reduced, the temperature of the solution is raised to 50°C, and a total of 3.56g of NaOH particles are slowly and gradually added to the solution, and the temperature of the solution rises to 76°C at the highest. At ℃±2℃, continu...
Embodiment 2
[0015] Under normal pressure and room temperature conditions (25°C±2°C), in a 2000ml three-neck flask equipped with a reflux condenser and a stirring device, (1) add 200.00g of isobutyraldehyde and keep stirring, and then slowly pour into the flask Add a total of 1.50g of NaOH particles to the flask. At this time, the reaction solution begins to reflux, and the temperature rises to 73°C; (2) When the reflux of the reaction system is significantly reduced and the temperature drops to 25°C, continue to add 200.00g of isobutylene to the flask Aldehyde, and slowly and gradually add a total of 1.50g of NaOH particles, the temperature of the reaction solution rose to 69 ° C; (3) Repeat step (2) three times to complete the addition of isobutyraldehyde a total of 1000.00g, a total of 7.50g of NaOH particles; ( 4) When the reflux of the reaction solution was significantly reduced, the temperature was raised to 50° C., and the remaining NaOH particles were slowly and gradually added to t...
Embodiment 3
[0017] Under normal pressure, room temperature condition (25 ℃ ± 2 ℃), catalyst addition ratio is 2.5% (the total addition of NaOH accounts for the total mass of isobutyraldehyde), in the 2000ml there-necked flask that is equipped with reflux condenser and stirring device, (1) Add 500.00g of isobutyraldehyde and keep stirring, then slowly add 2.41g of NaOH particles into the flask, at this time, the reaction solution starts to reflux, and the temperature rises to 76°C at the highest. (2) When the reflux of the reaction system is significantly reduced and the temperature drops to 25°C, continue to add 500.00g of isobutyraldehyde to the flask, and slowly add 2.41g of NaOH particles in total, and the temperature of the reaction solution rises to 71°C. (3) When the reflux of the reaction solution is significantly reduced, the temperature is raised to 50°C, and the remaining NaOH particles are slowly and gradually added to the solution, a total of 20.18g, and the solution temperatur...
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