Production of polymers from waste cooking oil
A technology for cooking oil and composition, which is applied in the field of preparing polymers from waste cooking oil, and can solve the problems of pollution hazards and the like
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Embodiment 1
[0033] Example 1: Laboratory preparation of alkyd resin by alcoholysis step
[0034] A bench-scale alkyd resin synthesis was performed as described below. 1.2 moles of yellow grease and 1.2 moles of glycerin were charged into a 3.0 liter flask equipped with a stirrer, packed column, condenser, thermometer and inert gas inlet. The reactor was flushed with inert gas and heated to 235°C. The reactor was maintained at 235°C, and the reaction was allowed to proceed for 1 hour under an inert atmosphere. The reaction temperature was then lowered to 185°C, and 4.4 moles of ethylene glycol, 0.8 moles of 2,2-dimethyl-1,3-propanediol, and 4.6 moles of phthalic anhydride were added to the reactor. The reaction was heated to 235°C over 5 hours while removing water. The batch temperature was maintained at 235° C. until an acid number of less than 10 and a viscosity of K on the Gardner-Holt scale (measured as a 70% solution in xylene) was obtained.
[0035] The resulting alkyd product h...
Embodiment 2
[0036] Example 2: Pilot Reactor Preparation of Pilot Batch by Alcoholysis Step
[0037] The method of Example 1 was scaled up for use in a stainless steel walled pilot reactor. 15.8 kg of glycerol and 49.2 kg of yellow fat were charged into a pilot reactor equipped with a stirrer, packed column, condenser, thermometer and inert gas inlet. The reactor was flushed with inert gas and heated to 235°C. The reactor was maintained at 235°C, and the reaction was allowed to proceed for 1 hour under an inert atmosphere. The reaction temperature was then lowered to 185°C, and 37.7 kg of ethylene glycol, 10.9 kg of 2,2-dimethyl-1,3-propanediol, and 93.8 kg of phthalic anhydride were added to the reactor. The reaction was heated to 235°C over 5 hours while removing water. During this time, an undesired phase of acrolein production was observed.
[0038] The ongoing test yielded an acid number of 17 and a Q (Gardner Holt scale) viscosity (measured as a 70% by weight solution of the al...
Embodiment 3
[0040] Example 3: Pilot plant preparation of alkyd resin without alcoholysis step
[0041] The method of Example 2 was modified to address the production of acrolein encountered in Example 2. 15.8 kg of glycerin, 10.9 kg of 2,2 dimethyl 1,3-propanediol, 37.7 kg of ethylene glycol, and 93.8 kg of phthalic anhydride were charged into a tank equipped with a stirrer, packed column, condenser, Thermometer and inert gas inlet in the pilot reactor. The reactor was flushed with inert gas and heated to 160°C. At 160°C, 49.2 kg of yellow grease was charged to the reactor. The reaction was heated to 235°C over 5 hours while removing water. The batch temperature was maintained at 235°C until an acid number of less than 10 was obtained, a viscosity in K (Gardner-Holt scale) (measured as a 70% solution in xylene) was obtained, and the alkyd product was free of haze . The reaction was held at 235°C for an additional 1 hour to ensure complete transesterification. Unlike the method of ...
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