Method of removing CO2 from allyl acetate product gas
A technology of allyl acetate and carbon dioxide, applied in chemical instruments and methods, separation/purification of carboxylate, preparation of carboxylate, etc., can solve problems such as accumulation of inert gas carbon dioxide, increase yield and improve reactants Efficient utilization and fewer side reactions
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Embodiment 1～6
[0037] Taking the removal of carbon dioxide from the product gas of a 100,000-ton / year allyl acetate plant as an example, the absorption tower and the carbon dioxide stripping tower use packed towers, the absorbent uses potassium carbonate, the temperature of the absorbent is 95°C, and the concentration of the absorbent is 20%. The ratio of the flow rate of the recycle stream to the flow rate of the recycle stream is used to investigate the change in the yield of the target product allyl acetate, the change in energy consumption and the change in the content of carbon dioxide in the absorption tail gas. The reference standard for energy consumption changes is the allyl acetate plant without carbon dioxide removal process.
[0038] according to figure 1 Described inventive method, implementation result is as shown in table 1. It can be seen from the table that when the ratio of the flow rate of the partial recycle stream to the flow rate of the recycle stream is around 0.15, t...
Embodiment 7～10
[0043] Taking the removal of carbon dioxide from the product gas of a 100,000-ton / year allyl acetate plant as an example, the absorption tower and carbon dioxide stripping tower adopt packed tower, plate tower and valve tower respectively, and the absorbent uses potassium carbonate or sodium carbonate. 95 ℃, the concentration of absorbent is 20%, the ratio of the flow rate of part of the recycle stream to the flow rate of the recycle stream is 0.15, and the change of the yield of the target product allyl acetate, the change of energy consumption and the change of the content of carbon dioxide in the absorption tail gas are investigated. The reference standard for energy consumption changes is the allyl acetate plant without carbon dioxide removal process.
[0044] As can be seen from Table 2, the form of the tower has little influence on the effect of absorption, and the use of potassium carbonate or sodium carbonate as the absorbent has no effect on yield and energy consumptio...
Embodiment 11～15
[0049] Taking the removal of carbon dioxide from the product gas of a 100,000-ton / year allyl acetate plant as an example, the absorption tower and the carbon dioxide stripping tower adopt packed towers or plate towers, and the absorbent uses potassium carbonate. The temperature of the absorbent is changed, and the concentration of the absorbent is 15%. The ratio of the flow rate of part of the recycle stream to the flow rate of the recycle stream is 0.15, and the change of the yield of the target product allyl acetate, the change of energy consumption and the change of the content of carbon dioxide in the absorption tail gas are investigated. The reference standard for energy consumption changes is the allyl acetate plant without carbon dioxide removal process.
[0050] according to figure 1 Described inventive method, implementation result is as shown in table 3. It can be seen from the table that the temperature of the absorbent is around 100°C, the yield increases the most...
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