Why have several sets of the same hydrazine hydrate technology been introduced in the country, while the seemingly more advanced hydrogen peroxide method has not been adopted?
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This post was last edited by sunjl1981 on January 6, 2013, at 21:32. Why are the several domestic implementations of hydrazine hydrate production technologies based on the sodium hypochlorite and acetone synthesis method? Meanwhile, it seems that the seemingly more advanced hydrogen peroxide-based method hasn’t been introduced at all. Please share your opinions. hcbbs!!
What does your buddy do? Isn’t the urea method feasible?
The key point is that the hydrogen peroxide method is more advanced and environmentally friendly; foreign companies would not transfer such technology to China. What does make its way here are processes that are restricted abroad, so they are brought to China. You also mentioned in your post the issue of water evaporation required when recovering catalysts using the hydrogen peroxide method. Another key technique in this method is the production of high-concentration hydrogen peroxide; the higher the concentration of hydrogen peroxide, the less water needs to be evaporated. This is another advantage of this method, as it requires less energy compared to other similar approaches. The yield of hydrazine obtained through this method can reach 20% (on a basis of hydrated hydrazine). However, there are still quite a few researchers in China working on the hydrogen peroxide method; it just hasn’t been industrialized yet.
That makes sense; I think the same way. They keep the most advanced technologies for themselves, while only bringing in the second-rate ones to China. Additionally, the requirements in terms of manufacturing processes are also different
The use of hydrogen peroxide for the hydration of hydrazine has been extensively studied in China, for example by the Xi’an Research Institute. Sichuan Chuhua Group conducted ten years of research, including pilot and pilot-scale tests; it is not known what the actual situation is.
Chuanhua has been conducting research for ten years; it wasn’t easy at all! I wonder what the progress is now. The reaction between sodium hypochlorite and the same substance proceeds very rapidly to form hydrazine; no catalyst is required, and the efficiency is high. Therefore, a tubular reactor can be used, which significantly reduces equipment investment costs. The only issue is the problem of brine. In contrast, hydrogen peroxide requires several hours of reaction time under similar conditions; it also has more requirements regarding equipment. Meanwhile, there is no production of hydrogen peroxide at very high concentrations in China. When using low-concentration hydrogen peroxide, more water needs to be distilled off, thereby increasing energy consumption.
In fact, the reaction time between hydrogen peroxide, ammonia, and butadiene to form butadiene azide isn’t very long. I’ve conducted some small-scale tests; generally, after adding hydrogen peroxide, the reaction only needs one hour to complete, with a yield exceeding 85%. The nitrogen synthesis process proposed by Ding also has low requirements for equipment; ordinary reactors, or even storage tanks equipped with stirring or circulation, can be used.
How can the yield of hydrazine hydrate produced by the Bayer process be improved? From the perspective of the reaction system, if anyone knows, please let me know. Thank you
There is, right?! The hydrazine hydrate produced by Sichuan Yibin Tianyuan Chemical is made using the hydrogen peroxide method, right?
Hello! I sincerely seek advice. Can I add you as a friend? Thank you!
Is there no technology for producing hydrogen peroxide in the country?