Device and method for energy saving and consumption reduction of dimethyl carbonate device
A technology of dimethyl carbonate and methanol, applied in the purification/separation of carbonate/haloformate, preparation of carbonate/haloformate, separation method, etc., can solve the problem of high-consumption steam pressurized rectification Tower reaction temperature and pressure, waste of latent heat of condensation of methanol and dimethyl carbonate mixture, inability to achieve high-density quality monitoring, etc., to achieve the effect of increasing product monitoring frequency, obvious energy saving effect, and improving mass transfer and separation efficiency
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[0045] Example 1: refer to the attached Figure 2-11 , a kind of method for energy saving and consumption reduction of dimethyl carbonate device mentioned in the present invention, comprises the following steps, below by mass percentage:
[0046] a) propylene carbonate, methanol and methanol base catalyst mixture material 9 enter the reactive distillation column 1 after heat exchanger 18 to carry out preliminary reaction fractionation, and the propylene glycol 12 generated by the reaction is discharged from the bottom of the tower to remove the propylene glycol refining tower, and the generated dicarbonate A part of the azeotrope of methyl ester and methanol is condensed from the overhead condenser 4 back to the reactive rectification tower 1, and a part of the azeotrope 10 enters the pressurized rectification tower 2 and carries out pressurized rectification;
[0047] b) after the pressurized rectifying tower 2 is separated, the content is that the dimethyl carbonate heavy fr...
Example Embodiment
[0082] Embodiment 2: a kind of method for energy saving and consumption reduction of dimethyl carbonate device mentioned in the present invention, the difference from embodiment 1 is: an online continuous detection and analysis device and a method are added, and the concrete device includes the following:
[0083] The dimethyl carbonate crude product discharged from the pressurized rectifying tower 2 is sent to the dimethyl carbonate refining tower 21, and the bottom of the dimethyl carbonate refining tower 21 discharges high-purity dimethyl carbonate, and the light component discharged from the top is sent again Enter the pressurized rectifying tower 2 and continue to circulate; In addition, the high-purity dimethyl carbonate of production is sent into the online synchronous detector 22, and after the online quality detection of the online synchronous detector 22, the dimethyl carbonate is sent into in storage tank 23.
[0084] Among them, the online synchronous detector incl...
Example Embodiment
[0091] Example 3: refer to the attached Figure 12 , the only difference from Embodiment 2 is that the pressure relief device 28 used is also additionally provided with an extension pipe 28.5. The extension pipe 28.5 is a flat closed pipe, one end is connected with the bell-shaped main body 28.3, and the other end is connected to the The advantage of the gas chromatograph is that the liquid after pressure relief passes through the flat closed tube and enters the gas chromatograph more smoothly, so that the continuous measurement and analysis of the present invention is more accurate.
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