Why is a compressor not used in the acetonitrile method for extracting butadiene, whereas it is required in the DMF method?
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This post was last edited by *nyang3390 on 2012-3-16 at 14:56. I have recently started learning about dibutene extraction units. In some literature, it is stated that \"when extracting dibutene using the acetonitrile method, solvent stripping can be carried out under high pressure, eliminating the need for a dibutene gas compressor and thus reducing costs\", while the DMF method \"involves the use of compressors in its process.\" My main doubts are as follows: 1. Is the so-called solvent stripping tower what we call a solvent recovery tower? Is it still a separation column for separating alkynes from the solvent? 2. I don’t quite understand why there is a difference between these two methods; is it because the boiling points of the two solvents are different? I would appreciate detailed guidance from those who are more experienced!
1. Is the so-called solvent stripping tower what we call a solvent recovery tower? Is it still a separation column for separating alkynes from the solvent? It is a stripping tower for separating alkynes from the solvent. 2. I don’t quite understand why there are differences between these two methods; is it because of the different boiling points of the two solvents? DMF has a high boiling point, which increases the pressure in the stripping tower and thus requires a higher operating temperature, leading to increased steam consumption. Additionally, this accelerates the hydrolysis of DMF. Acetonitrile has a low boiling point, so the operating pressure can be increased during stripping and separation.