Can the washing step be eliminated in coal tar refining?
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What would happen if the washing step were removed? Industrial naphthalene doesn’t meet the standards; is the equipment corroding rapidly?
Sure, it’s just that no one wants your industrial naphthalene
As the one who brings the washing to an end, I say there are no problems at all. :$
It is fine to omit the washing step; the phenol content in the oil will be higher as a result. It is impossible to reduce the phenol content in the washed oil, since it cannot be removed without washing, and the naphthalene content in the washed oil will also be higher. Industrial naphthalene is qualified with no issues. It mainly depends on sales; if a product can be sold, it doesn’t matter if it’s not washed.
I’m not sure which organization you work for; could you please share that? I have worked on tar processing in 3 plants that did not have a washing unit, so I have extensive experience. People in the industry give me the nickname \"The Washing Terminator\":lol:lol:lol
The fact that this feature of canceling washing has not been promoted indicates that there must be some problem with it; if it worked properly, it would have been promoted long ago
There are many issues involved here, such as: 1. Without washing, it is impossible to extract sodium phenolate, let alone proceed to extract the crude powder； 2. Industrial naphthalene can be considered qualified without a washing device, but it contains higher-level phenols such as xylene; over time, it will definitely oxidize and turn red, which will pose problems in the subsequent production of refined naphthalene. However, there are no issues if it is used as a water reducer ； 3. Without a washing device, the phenol content in the oil is definitely higher, which will certainly have some impact on benzene washing ； 4. The upper part of the primary tower for industrial naphthalene suffers from more severe corrosion; using 316L material can solve this problem. Ordinary carbon steel is sufficient after washing. 5......... 6. Technically, it’s not a problem; the key issue lies in sales.
I have been working in tar processing since 2004, and I have worked for several different companies; three of them didn’t even have washing facilities. The lack of washing isn’t the problem – the issue lies in sales. Of course, many facilities are designed with washing facilities from the start; personally, I think it’s necessary to produce coarse powder, as this allows for the extraction of products with higher value.