Glycerol method for epichlorohydrin
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This post was last edited by QXZ-1966 on 2009-5-12 at 20:25. What are the current standards for raw material consumption, as well as for water, electricity, and steam consumption in the production of epichlorohydrin using the glycerol method in China? How many companies are still using this method for production? What is the current price of glycerin?
Glycerol consumption: 1.2 tons (95% crude glycerol)； 0.9 tons of hydrogen chloride. At present, only Jiangsu Yangnong is engaged in large-scale production (60,000 tons), while Jiangsu Kunbao has a production capacity of several thousand tons. Others such as Dow, Ningbo Donggang Electric, and Shanghai Chlor-Alkali are in the planning or design phase and have not yet established production capabilities. Several other companies are considering pursuing this project, mainly with the aim of utilizing the by-produced hydrogen chloride to balance their products. The production of ECH using the glycerol method poses a challenge to the high-temperature chlorination process using propylene, mainly in terms of cost and wastewater treatment. The capital required for establishing a facility using the glycerol method is also much lower than that for the propylene method; it is possible that the propylene method will be phased out in the future. If you’re interested, we can continue the discussion.
"Glycerol consumption: 1.2 tons (95% crude glycerol)； Is the amount of 0.9 tons of hydrogen chloride industrial production data or experimental data? Will the glycerol method be cost-competitive now or in the next few years?
It is production data; the wastewater generated by the glycerol method is much less compared to that produced by the chlorohydrin method, and it can be treated using multi-effect evaporation technology at a low cost
The biggest challenge with this project is the treatment of waste brine; Yangnong is dumping it illegally, and it will have to close down in just a few days.
Reply to 5# wxl110: You can’t just talk nonsense about this. I understand that it can be handled; there are ways to treat high-salt wastewater.
I’ve done it too; it causes a lot of pollution. The workshop has a strong smell. The pipes of the equipment are highly corrosive. Pump failure rates are very high. The operational stability is fairly good.
Reply to 9# Chen Xuhui: It depends on the materials you choose and your skill level. The saying that details determine success or failure probably refers to something like this
Reply to 11# jjf278204: The pipe materials are all lined with PTFE; some of the storage tanks are made of fiberglass, while the reaction vessels are either lined with enamel or made of graphite. The towers are also made of graphite, and the packing is made of PTFE. But a balance needs to be found: graphite requires high investment and complex installation requirements, yet it offers better operational stability compared to enamel.
Could any colleague send me a feasibility study report on the use of glycerol for epichlorohydrin production? I’d like to take a brief look at it. gaodezhigo@163.com