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NRDC/Chemical Registration Center Inventory Part of SEPA
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Phase 1 of NRDC/CRC Study Inventory mercury supply through mining and imports, estimate total annual supply Investigate usage in the battery sector Investigate usage in vinyl chloride monomer manufacture
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China Mercury Supply Estimate (based on average 2002-2005) Legal Mining700 tons Imports233 tons Catalyst Recycle290 tons Illegal Mining0-200 tons Total1223-1423 tons By-product capture…..
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China VCM Sector Mercury Usage, 2002-2004 (tons) Year200220032004 Mercury catalyst 354841516103 Total mercury354.8415.1610.3
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Growth estimates for PVC sector From 2002-2004, PVC output in China rose from 1.96 million tons to 3.1 million tons, an annual increase of over 25%. Mercury catalyst usage grew by an annual rate of 31.4% during this period. ***This is probably the largest single use of mercury within any sector of any country****
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Options for Reducing Mercury Usage in VCM manufacture Alternative non-mercury catalysts Coal to ethylene via naptha Better management of mercury catalyst during production Improvements in recycling??
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