Production technology of dimethyl carbonate
A dimethyl carbonate and production process technology, applied in the field of dimethyl carbonate production process, to achieve the effects of reducing energy consumption, increasing production capacity, and increasing output
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Embodiment 1
[0010] The production technology of embodiment 1 dimethyl carbonate
[0011] In T1 (reactive distillation column), methanol and propylene carbon react under the action of catalyst sodium methoxide to form dimethyl carbonate, and the light component product dimethyl carbonate and raw material methanol formed by the reaction form an azeotrope and enter the column The vent balance tube on the top (condensing), wherein, the azeotrope formed by dimethyl carbonate and methanol is deeply condensed (introduced into the cryocooler by the vent balance tube), so that it changes from gas phase to liquid phase completely, After deep condensation, it is led to the +10m T4 feed tank by the frame +42 meters, thereby forming a jet self-priming, so that the pressure at the top of the T1 tower becomes a negative pressure state (adjust the pressure at the top of the T1 tower to -10KPa).
Embodiment 2
[0012] The production technology of embodiment 2 dimethyl carbonates
[0013] In T1 (reactive distillation column), methanol and propylene carbon react under the action of catalyst sodium methoxide to form dimethyl carbonate, and the light component product dimethyl carbonate and raw material methanol formed by the reaction form an azeotrope and enter the column The vent balance tube on the top (condensing), wherein, the azeotrope formed by dimethyl carbonate and methanol is deeply condensed (introduced into the cryocooler by the vent balance tube), so that it changes from gas phase to liquid phase completely, After deep condensation, it is led to the +10m T4 feed tank by the frame +42 meters, thereby forming a jet self-priming, making the pressure at the top of the T1 tower into a negative pressure state (adjust the pressure at the top of the T1 tower to -20KPa).
[0014] Production example: At present, the applicant has two sets of dimethyl carbonate production devices. The ...
example 1
[0015] Example 1: Application on an annual output of 12,000 tons of dimethyl carbonate production equipment
[0016] (1) when adjusting T1 tower top pressure down to-10KPa (method is with embodiment 1), the mass content of tower top dimethyl carbonate rises to 32% by 30% under normal pressure, thereby the production capacity of device is increased (32-30) / 30=6.67%, the annual increase of dimethyl ester products: 12000*6.67%=800.4 tons, calculated according to the profit of 1,000 yuan per ton of dimethyl carbonate production, the annual increase in benefits: 800*1000=800000 Yuan = 800,000 yuan;
[0017] (2) Due to the drop in the pressure at the top of the T1 tower, the temperature in the T1 tower dropped from 62.5°C under normal pressure to 57°C, reducing the amount of heating, thereby reducing the coal consumption per ton of dimethyl ester under normal pressure to 1.5 tons 1.3 tons, calculated according to the price of 750 yuan per ton of raw coal (Shanxi Shenmu), the annual...
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