Crude methanol causes high silver consumption in formaldehyde production enterprises
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Recently, after crude methanol produced by a facility in Luohe, Henan Province was supplied to a formaldehyde production plant, the manufacturer found that the consumption of silver catalysts increased significantly when using methanol from that facility compared to before. Regarding this phenomenon, please discuss what the possible reasons might be What are the possible substances that lead to high consumption? This post was last edited by bht11 on 2007-8-9 22:08]
It’s very informative. Worth learning from.
May I ask, do you all know the price difference between crude methanol and refined methanol?
Not bad; it’s worth learning*. It’s just that there aren’t many people who have posted comments
It’s well worth learning*. Communication helps us make greater progress. I’m a beginner; only after getting involved in this industry did I realize there are so many talented people. In the future, I need to learn from everyone more to contribute to our country’s chemical industry.
this piece of junk
Basically, **there are no relevant quality standards for crude alcohol**, resulting in inconsistent quality of crude alcohol products. Although they’re all referred to as crude alcohol, their compositions vary significantly. The current situation can be changed by using activated carbon filtration
Producing formaldehyde directly from crude methanol is definitely a good way to reduce costs. Could the methanol vapor coming out of the methanol distillation tower be sent directly to the formaldehyde production unit without being cooled first?
Producing formaldehyde directly is definitely a good way to reduce costs. However, crude methanol requires 4 stages of treatment. Only then can the unit consumption be maintained. If silver consumption is high, management issues should be considered. I’ve encountered it.
If it is crude methanol with a purity of around 95%, it is still feasible to produce formaldehyde as long as appropriate filtration measures are taken to remove the impurities that could contaminate the catalyst. Compared to refined methanol, this approach saves approximately 100 yuan per ton of formaldehyde produced, thanks to methods such as distillation and multi-stage purification. Methanol storage tanks are sealed, making it difficult to remove solid impurities; therefore, filtering devices cannot be installed inside them. If distillation is used, additional storage tanks are required, which increases the investment cost. Impurities will flow into the small storage tank through the pipe below via the pump; therefore, purification should take place between the large storage tank and the pump. By adding two adjacent purification units between the large storage tank and the pump, with a high-absorption filtering medium and a microporous filter placed at the front and natural sedimentation used at the back, volatile sulfides, chlorides, and solid suspended particles in the raw material can be effectively removed, thereby preventing the catalyst from being poisoned and rendered inactive. After each stop, it is necessary to clean the impurities from the purification device to ensure the purity of methanol in subsequent production.
Another reason for excessive silver consumption is related to the matching of the fineness grades of silver. Generally speaking, using a mixture of sponge silver and crystalline silver yields better results when dealing with coarser grades. For more detailed information, you can send me an email at 1395399@163.com or call me at 13953995551