What is the current progress of mercury-free catalysts?
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Mercury emission reduction has become a bottleneck for the PVC industry. I wonder if there are any companies currently making significant investments and conducting research in this area?
Yunnan Salt Chemicals says they have done a good job; you can consult them
Our new project takes into account the mercury emission standards; we have hired an environmental protection company to handle mercury-containing wastewater, and they have promised to reduce the mercury level to 5 ppb. We’ll have to wait and see… As for those low-mercury catalysts, according to the design institutes, they cannot be widely adopted at the moment because the technology is not yet fully developed.
High mercury → Low mercury → No mercury. Pressed by form. It is said that global mercury resources are in short supply. But even low-mercury versions are not yet mature, making the promotion of mercury-free options even more difficult.
Current development trends: 1. Heavy metals that can replace mercury and are more expensive have shown some success in laboratories, but industrial adoption is still hesitant due to investment costs. 2. The positive attitude of domestic universities and research institutions is encouraging, but there is a lack of willingness to seek advice from abroad; just because mercury pollution does not exist overseas does not mean that effective solutions for dealing with it do not exist as well. 3. Domestic companies that started working on this issue early on have now managed to develop mercury-free formulations at a cost of 3 or 4 yuan