【JST-014】One-on-one answering office for gas-liquid aromatic hydrocarbon extraction
Thread Content
This post was last edited by Firefly on 2015-4-10 08:19. I have been engaged in the extraction of gas and liquid aromatic hydrocarbons for 10 years. I have a certain understanding of the extraction of gas and liquid aromatic hydrocarbons. If you need help, please consult me and I will do my best to answer your questions.
Some time ago, we looked at the aromatic hydrocarbon extraction process and found that 3.7MPa steam was consumed in the consumption of public works. Please explain the parts where steam is used.
If there are only three towers: extractive distillation tower, solvent recovery tower, and regeneration tower, then it is impossible to use 3.7MPA steam, or the steam grade used for extraction is not available in the factory, and the temperature and pressure need to be reduced. The steam temperature used in the extraction unit must be below 210°C and if there is post-fractionation then a clay feed heater may be used.
I understood it as soon as you explained it, thank you. Originally we planned to only carry out monobenzene extraction, but we probably won’t do it now.
The reason why 3.7MPA steam is not used is because the solvent degrades at high temperatures. The consequence of solvent degradation is acid corrosion.
If you need help with anything, call me anytime, haha.
Let’s discuss together and learn from each other* , if you friends have any questions in this regard, I may @ you then!
Absolutely no problem, in fact I am also learning* , Haha, I also hope to make friends who know aromatics extraction technology.
This post seems to have been opened just in time. We use the sulfolane extraction and distillation process of the Institute of Petroleum and Chemical Engineering. In which sulfolane is used in conjunction with a co-solvent, but I don’t know what the co-solvent consists of. Please give me some advice. Thank you!
I can send you a MSDS of techtiv-100, and you can check it yourself for details. However, based on my personal understanding, the common co-solvent for sulfolane solvents is usually water, mixed with a small amount of water, which helps to improve the selectivity of the solvent. In addition, it can lower the freezing point during transportation. The freezing point of the solvent is low, and the purity of the solvent is not 100%. The purity is generally around 95%. Send me an email if necessary
I have never understood why water has high solvent selectivity. What is the principle? And you mentioned lowering the freezing point, what are the benefits to him.