Method for synthesizing acetone ketal glycerinum acetate from glycerinum
A technology of acetone acetal acetate and acetone acetal is applied in the field of production technology of acetone acetal acetate, can solve the problems of increasing atomization, reducing fuel viscosity, etc., and achieves the advantages of less equipment corrosion, environmental protection and high yield. Effect
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Embodiment 1
[0023] 1) Add 2 mol of glycerol, a by-product of biodiesel (accounting for about 10% of the total mass of biodiesel), to the condensation reactor after pretreatment, deodorization, decolorization, and rectification to a purity of 98%, and then press glycerol: acetone = 1 : 2 (ratio of substances, the same below) Add acetone to the condensation kettle, add acidic ion exchange resin HND-580 according to 1% of the mass of glycerin, and stir at 40°C for 4.5h for condensation reaction; after the condensation reaction is completed, transfer the product to the extraction kettle, cooled to room temperature, and extracted three times with an equal volume of butyl ether. The extract was heated to 75°C by a heater and entered into a rectification tower. Under the condition of vacuum degree of 0.099-0.1, collect the distillate at 80-83°C, which is acetonide;
[0024] 2) Add 1 mol of acetonide to the reaction / azeotropic distillation device, and add acetone glycerol with a mass of 0.1 % KO...
Embodiment 2
[0026] 1) Add 2 mol of glycerin, a by-product of biodiesel (accounting for about 10% of the total mass of biodiesel), to the condensation reactor after pretreatment, deodorization, decolorization, and rectification, and then press glycerol: acetone = 1:3 Add acetone, add acidic ion exchange resin HND-580 according to 3% of glycerin mass, and stir and react at 50°C for 3h; The second time, the extract is heated by a heater to 75°C and enters the rectification tower, acetone is evaporated at normal pressure, butyl ether is evaporated under reduced pressure for recycling, and then the fraction at 80-83°C is collected under the condition of vacuum degree of 0.099-0.1MPa , which is acetone glycalol;
[0027] 2) Add 1 mol of acetonide to the reaction / azeotropic distillation device, and add acetone glyceride mass 0.2% solid K according to acetone glycerol: propyl acetate = 1:10 (mass ratio) 2 CO 3 , reacted at 100°C, and refluxed for 8 hours, until the content of propanol in the to...
Embodiment 3
[0029] 1) Add 2 mol of glycerin, a by-product of biodiesel (accounting for about 10% of the total mass of biodiesel), to the condensation reactor after pretreatment, deodorization, decolorization, and rectification, and then add glycerin: acetone = 1:5 Add acetone, add acidic ion exchange resin HND-580 according to 5% glycerin mass, and stir and react at 60°C for 1 h; after the condensation reaction is completed, transfer the product to an extraction kettle, cool to room temperature, and extract with 3 times the volume of butyl ether Three times, the extract was heated by a heater to 75°C and entered the rectification tower, acetone was steamed under normal pressure, butyl ether and acetonide were evaporated under reduced pressure, and the 80-83°C was collected under the condition of vacuum degree of 0.099-0.1MPa. The distillate is acetonide;
[0030] 2) Add acetonide to the reaction / azeotropic distillation device, add acetone mass 0.2% CH according to acetone: propyl acetate ...
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