Method and device for preparing rosin ester by coupling catalytic esterification and separation

[0037] as attached Figure 1-4 As shown, the device for catalyzing esterification-separation coupling to prepare rosin ester method includes: dissolution kettle 1, esterification reactor 2, expander 3, gas-liquid separator 4, turbine compressor 5, separation tower 6, Return pump7.

[0038] The discharge port of the dissolution kettle 1 is connected with the feed port of the esterification reactor 2, and the dissolution kettle 1 is used for dissolving raw materials required for production. The esterification reactor 2 is cylindrical, and the top of the esterification reactor is provided with a feed inlet 21, a gas outlet 22, and the bottom is provided with a discharge outlet 23, and the esterification reactor 2 includes a heating pipe 24, which is a heating coil. It is arranged inside the esterification reactor; the gas distributor 25 includes an air inlet 251 and a plurality of nozzles 252 for exhaust; the expander 3 is connected to the gas outlet of the esterification reacto...

[0044] The reaction device that uses is identical with embodiment 1, and a kind of catalytic esterification-separation coupling prepares rosin ester method:

[0045] Add ethanol and rosin in a molar ratio of 3:1 to the melting tank 1, then add glycerin and dimethyl carbonate of 25% of the weight of rosin, heat and melt to form a mixed material, and feed CO2 to press the material into the esterification reactor Inner 2, then raise the temperature to 150°C, and continuously feed CO2 until the pressure inside the esterification reactor 2 is 0.01Mpa, then open the gas outlet valve of the esterification reactor 2, so that the water vapor and glycerin vapor generated during the esterification reaction , dimethyl carbonate vapor, and CO2 mixed gas-phase substances flow out continuously, the outflow volume is ≤12000m3 / h, the pressure is ≤10.0MPa, and enters the gas-liquid separator 4 after being throttled and expanded by the expander 3, and then expanded and dropped by the expander 3 ...

[0047] The reaction device that uses is identical with embodiment 1, and a kind of catalytic esterification-separation coupling prepares rosin ester method:

[0048] Glycerol (glycerol) and rosin are added into the melting pot 1 in a molar ratio of 5:1, and the added glycerin and rosin weight of 10% 200# solvent oil are heated and melted to form a mixed material. Enter the esterification reactor 2, then raise the temperature to 100°C, and continuously feed CO2 until the pressure in the esterification reactor 2 is 3.0Mpa, then open the gas outlet valve of the esterification reactor 2, so that the gas generated during the esterification reaction Water vapor, glycerin vapor, 200# solvent oil vapor, and CO2 mixed gas phase substances continuously flow out, the outflow volume is ≤12000m3 / h, and the pressure is ≤10.0MPa. After being throttled and expanded by the expander 3, it enters the gas-liquid separator 4. The expansion and pressure reduction or throttling expansion and pressur...