Gas fractionation propylene yield
Thread Content
I have been studying recently* Gas fractionation device, the propylene content in the liquefied gas of our device is more than 30%. After gas fractionation, the yield of propylene is generally around 18%. I would like to ask how your device is like. Is the yield of propylene like our device low?
The propylene content in our liquefied gas is also about 30%. However, after gas fractionation, almost all propylene is recovered. What about 99.8% of propylene?
Then the propylene we can recycle can only reach 70% to 80%. Isn’t it too wasteful?
Analyze whether the propylene content of the heavy component at the bottom of the tower exceeds the standard and adjust the tower operation. There should be an operation problem.
Yes, when you talk about propylene yield, do you mean the proportion of raw materials? Our yield is only about 5%. If it is the proportion of liquefied gas, our yield is about 40%. If you think your propylene yield is low, you should analyze whether the propylene content in the propane at the bottom of the purified propylene column exceeds the standard! !
Under normal circumstances, the propylene recovery rate is 95%. Check the propane purity, ethane concentration, and the amount of propylene carried by C4 products.
Ours is almost 98%
Generally, the LPG produced by one's own catalysis is degassed, and the propylene content of conventional catalysts (referring to the kind that does not produce more olefins) is 30-45% (volume ratio). After gas separation, the maximum output is converted into weight yield, plus what escapes from the pressure control at the top of the deethanizer tower, the top of the propylene tower, and the four decarbonization towers For the propylene brought into the C4 and propane at the bottom of the propylene tower, the propylene mass yield of more than 99.5% is generally 18-25-30%, which is relatively normal. If it is lower than this value, please start or stop the deethanizer tower, strengthen the operation and management of the decarbonization tower and the propylene tower, and enhance the propylene recovery rate. . . :lol
Take a look to see if the calculation is wrong?