Organosilicon thickening agent catalytic synthesis method with ultra-microporous platinum catalyst prepared with response surface optimization method
A response surface optimization method and platinum catalyst technology, applied in the field of organosilicon chemistry and chemical engineering, can solve the problems of violation, impact on chemical stability, and difficult recovery of catalysts, and achieve easy recovery, good chemical stability, and basically low catalytic performance. change effect
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Embodiment 1
[0022] Add a certain proportion of allyl alcohol polyoxyalkylene hydroxy ether HE-38 and platinum catalyst into the reactor of the parallel reaction station, raise the temperature to 60°C, keep it for 20 minutes, and slowly drop heptamethyltrisiloxane into the reactor. The molar ratio of the three is 0.7:1:0.005, the temperature is raised to 80°C, and kept for 2 hours; after the reaction is completed, the platinum catalyst is obtained by filtration, and reused, the obtained solution is the silicone thickener, and the conversion rate of heptamethyltrisiloxane is 80.2%, and the platinum catalyst selectivity is 78.9%.
Embodiment 2
[0024] Add a certain proportion of allyl alcohol polyoxyalkylene hydroxy ether HE-38 and platinum catalyst into the reactor of the parallel reaction station, raise the temperature to 60°C, keep it for 20 minutes, and slowly drop heptamethyltrisiloxane into the reactor. The molar ratio of the three is 0.8:1:0.005, the temperature is raised to 90°C, and kept for 2 hours; after the reaction is completed, the platinum catalyst is obtained by filtration, and reused, the obtained solution is the silicone thickener, and the conversion rate of heptamethyltrisiloxane is 81.5%, and the platinum catalyst selectivity is 79.6%.
Embodiment 3
[0026] Add a certain proportion of allyl alcohol polyoxyalkylene hydroxy ether HE-38 and platinum catalyst into the reactor of the parallel reaction station, raise the temperature to 70°C, keep it for 30 minutes, and slowly drop heptamethyltrisiloxane into the reactor. The molar ratio of the three is 0.9:1:0.005, the temperature is raised to 90°C, and kept for 2 hours; after the reaction is completed, the platinum catalyst is obtained by filtration, and reused, the obtained solution is the silicone thickener, and the conversion rate of heptamethyltrisiloxane The selectivity of the platinum catalyst was 82.1%, and the selectivity of the platinum catalyst was 80.9%.
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