In the desulfurization production process for MTBE products, crystallization of the desulfurized material occurred, causing blockages in the pipelines
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In the desulfurization process for MTBE products, crystallization occurred in the material after desulfurization, leading to blockages in the pipelines. What could be the cause? Is it the operating temperature during the desulfurization process? Was it the desulfurizer that caused crystallization after removing sulfides from MTBE? Could the expert give an analysis? Thank you
I’m not sure what process you use; I guess it’s probably an extractive distillation column. Under normal circumstances, gums form in the bottom of the extraction process tower.
What is used as a desulfurizing agent? I think it’s very likely related to the desulfurizer? Just like the ammonium salts resulting from the desulfurization of ethanolamine tend to crystallize easily!
It is a complexation extraction process; what substance is formed from the sulfur in the desulfurizer and MTBE? If it is a gel, is there a high possibility of crystallization when the temperature drops? Are there no other possibilities? Please analyze it for me, thank you
It is a nitrogen-containing compound; it is produced using complexation extraction technology by a company in Guangxi. Could you please help explain what crystallization is and its causes? Thank you so much
The complexation process generally includes three steps: extraction (rough removal), complexation (precise removal), and solvent regeneration. The process varies slightly depending on the sulfur content in crude MTBE. The solvent inevitably forms large-molecule complexes with organic sulfides, raising the solvating boiling point. The product may contain some impurities, and some solids may precipitate after water cooling. During extraction and complexation, the temperature at the bottom of the tower should not be too low, as there is a high likelihood of gel formation there. If you can provide the operating parameters, I can help analyze and assess it further.
The temperature at the bottom of the tower is around 90 degrees. If the macromolecular complexes are not removed or regenerated from the tank in a timely manner, will they coking or crystallize? The color of the material in the bottom of the tower has darkened significantly.
The complex will not do this in the short term; however, over time, or if the temperature at the bottom of the tower is too high, it will occur, and in such cases, external supply can be utilized promptly. Some manufacturers use anti-adhesive agents, which can alleviate the problem to some extent, but cannot eliminate it completely. A darker color is a normal phenomenon; the higher the sulfur content in the raw material, the darker the color will be.
Excuse me for a moment – can desulfurizing agents also remove the nitrogen element from MTBE? The nitrogen content in the bottom of the tower is 100 times higher than that of the fresh desulfurizer; where does this nitrogen come from?
Products rarely have excessive levels of N. There are two factors at play here: 1 is the basic nitrogen in the raw materials, and no problems occur during the initial and intermediate stages of using the M catalyst. 2 is the desulfurizer itself. I’m not aware of the composition of your desulfurization agent, so it’s difficult to draw a conclusion. You can send the raw material and product analysis reports to my email address, tuodila@126.com. By reviewing the analysis report, the reasons can be analyzed further.
I can’t log in to the Haichuan account on my computer. The APP allows me to read messages these past two days, but I can’t open posts. I was only able to log in via mobile this morning. Whoa, what’s going on?