The Use and Storage of Methyl Isocyanate (MIC) at Bayer CropScience (2012) / Chapter Skim
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Appendix B: Carbamate Pesticide and Methyl Isocyanate Timeline
Appendix B: Carbamate Pesticide and Methyl Isocyanate Timeline
Pages 157-172
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From page 157... ...
production started in Institute East Carbamoylation Center; production by isocyanate process (aldicarb oxime + methyl isocyanate → aldicarb)
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From page 158... ...
1979: UCC shuts down MIC Unit 1 because of lower projected demand. 1984: UCC methomyl and Larvin production started using isocyanate process in Institute West Carbamoylation Center on old olefins site.
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From page 159... ...
production and integrates with continuous methomyl process for minimum MIC inventory. 11 August 1985: Accidental release of aldicarb oxime and methylene chloride in Miscellaneous Carbamates Unit (aldicarb plant)
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From page 160... ...
buys Union Carbide Agricultural Products Division March 1987: Study by Schering Agrichemicals related to local Michigan production of carbamates given the loss of availability of bulk MIC (small scale: 1M lb/yr final product)
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From page 161... ...
DuPont methyl formamide oxidation process (methyl formamide + O2 → MIC + H2O) Pros: DuPont technology; cost depends on methyl formamide cost, but lower than cyanate process Cons: Need for pilot plant; Long development and startup time; lower MIC quality could risk lower aldicarb quality; needs "miracle" process and technology relationship with DuPont Also considered transfer of Woodbine formulation capabilities to Institute (except gypsum granulation)
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From page 162... ...
related to MIC, phosgene, and chlorine safety. Aspects include chlorine unloading, chlorine transfer, phosgene production, elimination of hard-to-clean small diameter piping, MIC refining system and phosgene separation system leak detection, water leak detection by analysis for CO2, reduce number of make tanks, field storage tank modifications, MIC transfer line changes, methylamine storage relocation, local storage of caustic for MIC destruction, standby emergency diesel electric generator; allow MIC production unit to operate at reduced rates (700-4000 lb/hr)
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From page 163... ...
Emergency dump tank available for safe transfer of product from leaking vessel, 2. Scrubber will destroy MIC from any storage tank, 3.
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From page 164... ...
; two batch lines; 1000kg/batch; no overnight storage. Has/Does: Scrubbers, dump tanks, backup control room instruments, auto matic MIC isolation valves, diking, fire deluge system, pressure relief valves, backup diesel power, gravity flow for MIC, mechanical seals on agitators, fire protection for transfer lines, periodic process hazard analysis, safety reviews for design and equipment changes, operational reviews for process changes, safety review team expertise, inventory limits, annual review of procedures, personnel safety procedures, enforced plant procedures, trained and qualified operators, trained maintenance, hazard communications, testing and inspection for leaks,
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From page 165... ...
November 1999: RP begins production of new carbamate Oxamyl in Miscellaneous Carbamates Unit. December 1999: Rhône-Poulenc agricultural products division merged with Hoechst Shering AgrEvo to form Aventis CropScience.
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From page 166... ...
MIC purity must be maintained to minimize the probability and rate of undesirable reactions; b. Multiple analyzers based on diverse technologies used to monitor MIC quality both before and after entering storage tanks; and c.
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From page 167... ...
15. Transfer from MIC underground tank to the aldicarb unit is also done continuously using double-walled pipe.The MIC goes directly into the batch aldicarb reactor and there is no MIC storage in the unit.
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From page 168... ...
2010: Bayer planned MIC production: 11.5M lbs 2010: In response to House Energy and Commerce Committee request to investigate alternative MIC technologies, Bayer evaluated five most promising alternatives: 1. Current Bayer (UCC)
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From page 169... ...
; in addition, impact on aldicarb formulation highly likely because of its complexity and sensitivity to low level of impurities; • mpact on manufacturing technologies for aldicarb and carbaryl: signifi I cant amount of process development required for adaptation (2-3 years) ; • tilization of recycle phenol (no experience of Enichem technology at U large scale available)
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From page 170... ...
11 January 2011: Bayer announces plans to restart the East Carbamoylation Center and the new reduced MIC inventory system for aldicarb and carbaryl production, but for a period of no more than 2 years.
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From page 171... ...
171 APPENDIX B 18 March 2011: As a result of legal challenges and delays that meant missing the production window to meet demand for the 2011 growing season, Bayer announces decision not to restart aldicarb, carbaryl, or MIC production facilities and to permanently shut down the East Carbamoylation Center, ending all MIC and carbamate pesticide production at Institute.
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